10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended May 31, 2021

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                  to                 

Commission file number 0-50761

AngioDynamics, Inc.

(Exact name of registrant as specified in its charter)

Delaware	11-3146460
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

14 Plaza Drive, Latham, New York 12110

(Address of principal executive offices and zip code)

(518) 795-1400

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $.01 per share	ANGO	NASDAQ Global Select Market

Securities registered pursuant to Section 12(g) of the Act:

None

(Title of Class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☐    No  ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.    Yes  ☐    No  ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒   No  ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.  Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of November 30, 2020, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the registrant’s common stock held by non-affiliates was approximately $496,277,118 computed by reference to the last sale price of the common stock on that date as reported by The NASDAQ Global Select Market.

As of July 26, 2021 there were 38,444,076 shares of the registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

The information required for Part III of this Annual Report on Form 10-K is incorporated by reference to the registrant’s Proxy Statement for its 2021 Annual Meeting of Stockholders to be filed within 120 days of the registrant's fiscal year ended May 31, 2021.

AngioDynamics, Inc. and Subsidiaries

INDEX

		Page
Part I:
Item 1.	Business	2
Item 1A.	Risk Factors	16
Item 1B.	Unresolved Staff Comments	29
Item 2.	Properties	29
Item 3.	Legal Proceedings	29
Item 4.	Mine Safety Disclosures	29
Part II:
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity	30
Item 6.	Selected Financial Data	31
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	43
Item 8.	Financial Statements and Supplementary Data	43
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	43
Item 9A.	Controls and Procedures	44
Item 9B.	Other Information	46
Part III:
Item 10.	Directors, Executive Officers and Corporate Governance	47
Item 11.	Executive Compensation	47
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	47
Item 13.	Certain Relationships and Related Transactions, and Director Independence	47
Item 14.	Principal Accounting Fees and Services	47
Part IV:
Item 15.	Exhibits, Financial Statement Schedules	48

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Part I

Unless otherwise indicated in this report, "AngioDynamics," the "Company," "we," "our" or "us" refers to AngioDynamics, Inc and our consolidated subsidiaries.

Disclosure Regarding Forward-Looking Statements

This annual report on Form 10-K, including the sections entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements regarding AngioDynamics’ expected future financial position, results of operations, cash flows, business strategy, budgets, projected costs, capital expenditures, products, competitive positions, growth opportunities, plans and objectives of management for future operations, as well as statements that include words such as “expects,” “reaffirms,” “intends,” “anticipates,” “plans,” “believes,” “seeks,” “estimates,” “projects,” or variations of such words and similar expressions, are forward-looking statements. These forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties. Investors are cautioned that actual events or results may differ materially from our expectations, expressed or implied. Factors that may affect our actual results achieved include, without limitation, our ability to develop existing and new products, future actions by FDA or other regulatory agencies, results of pending or future clinical trials, the results of ongoing litigation, overall economic conditions, general market conditions, market acceptance, foreign currency exchange rate fluctuations, the effects on pricing from group purchasing organizations and competition, our ability to integrate purchased businesses and other factors including natural disasters and pandemics (such as the scope, scale and duration of the impact of COVID-19). Other risks and uncertainties include, but are not limited to, the factors described from time to time in our reports filed with the Securities and Exchange Commission (the "SEC").

Although we believe that the assumptions underlying the forward-looking statements contained herein are reasonable, any of the assumptions could be inaccurate and, therefore, there can be no assurance that the forward-looking statements included in this quarterly report on Form 10-K will prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that our objectives and plans will be achieved. Any forward-looking statements are made pursuant to the Private Securities Litigation Reform Act of 1995 and, as such, investors are cautioned not to place undue reliance on these forward-looking statements which speak only as of the date stated, or if no date is stated, as of the date of this report. AngioDynamics disclaims any obligation to update the forward-looking statements. 

Disclosure Regarding Trademarks

This report includes trademarks, tradenames and service marks that are our property or the property of other third parties. Solely for convenience, such trademarks and tradenames sometimes appear without any “™” or “®” symbol. However, failure to include such symbols is not intended to suggest, in any way, that we will not assert our rights or the rights of any applicable licensor, to these trademarks and tradenames. For a complete listing of all our trademarks, tradenames and service marks please visit www.angiodynamics.com/IP.

Item 1. Business.

OVERVIEW

AngioDynamics, Inc. designs, manufactures and sells a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for the treatment of peripheral vascular disease, vascular access and for use in oncology and surgical settings. Our devices are generally used in minimally invasive, image-guided procedures.

HISTORY

AngioDynamics was founded in Queensbury, N.Y., U.S., in 1988 and began manufacturing and shipping product in the early 1990s. The Company is headquartered in Latham, N.Y., with manufacturing primarily out of the Queensbury facility. Initially dedicated to the research and development of products used in interventional radiology, the Company soon became well established as a producer of diagnostic catheters for non-coronary angiography and thrombolytic delivery systems.

The Company grew over the following years as a result of acquisitions of companies including RITA Medical Systems in January 2007, Oncobionic in May 2008, Vortex Medical, Inc. in October 2012, Clinical Devices in August 2013, the assets of Diomed in June 2008 and the assets of Microsulis Medical Limited in January 2013. These acquisitions added product lines including ablation and NanoKnife systems, vascular access products, angiographic products and accessories, dialysis products, drainage products, thrombolytic products, embolization products and venous products. In May 2012, the Company acquired Navilyst Medical's Fluid Management business, which the Company sold in May 2019 to Medline Industries, Inc. pursuant to an asset purchase agreement.

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In August 2018, the Company acquired the BioSentry product line from Surgical Specialties, LLC. In September 2018, the Company acquired RadiaDyne, which included endorectal and vaginal balloons. On October 2, 2019, the Company acquired Eximo Medical, Ltd., a pre-commercial stage medical device company and its proprietary 355nm laser atherectomy technology (now called Auryon), which treats Peripheral Artery Disease. On December 17, 2019, the Company acquired the C3 Wave tip location asset from Medical Components Inc.

AngioDynamics is publicly traded on the NASDAQ stock exchange under the symbol ANGO.

PRODUCTS

Our product offerings fall within three Global Business Units (GBUs): Endovascular Therapies (formerly, Vascular Interventions and Therapies ("VIT")), Oncology/Surgery ("OS") and Vascular Access ("VA"). All products discussed below have been cleared for sale in the United States by the Food and Drug Administration. International regulatory clearances vary by product and jurisdiction.

Endovascular Therapies Products

AngioDynamics’ Endovascular Therapies product offerings support the medical areas of Thrombus Management, Atherectomy, Peripheral Products (Core) and Venous Insufficiency.

Thrombus Management

Our Thrombus Management portfolio includes the proprietary AngioVac venous drainage cannula and circuit, as well as catheter directed thrombolytic devices, including the Uni-Fuse system, the Uni-Fuse+ system, the Pulse Spray system and SpeedLyser infusion catheters. AngioDynamics offers a range of options when treating thrombus and removing fresh, soft thrombi or emboli.

AngioVac

Our AngioVac venous drainage system includes a Venous Drainage Cannula and Extracorporeal Circuit. The cannula is indicated for use as a venous drainage cannula and for removal of fresh, soft thrombi or emboli during extracorporeal bypass. The AngioVac circuit is indicated for use in procedures requiring extracorporeal circulatory support for periods of up to six hours. AngioVac devices are for use with other manufacturers’ off-the-shelf pump, filter and reinfusion cannula, to facilitate venous drainage as part of an extracorporeal bypass procedure.

The AngioVac venous drainage cannula is a 22 French flat coil-reinforced cannula designed with a proprietary self-expanding nitinol reinforced funnel shaped distal tip. The funnel shaped tip enhances venous drainage flow when the distal tip is exposed by retracting the sheath, helps prevent clogging of the cannula with commonly encountered undesirable intravascular material, and facilitates embolic removal of such extraneous material.

Auryon

The Auryon Atherectomy System is one of our latest advancement in peripheral arterial disease. The Auryon system is designed to deliver an optimized wavelength, pulse width, and amplitude to remove lesions while preserving vessel wall endothelium. Additionally, the Auryon system includes aspiration which enhances the safety of the procedure. Regardless of lesion type, the Auryon system provides exceptional safety and efficacy. The Auryon system is indicated for use in the treatment, including atherectomy, of infrainguinal stenoses and occlusions, including in-stent restenosis (ISR).

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Thrombolytic Catheters

Thrombolytic catheters are used to deliver thrombolytic agents, which are drugs that dissolve blood clots in hemodialysis access grafts, arteries, veins and surgical bypass grafts. AngioDynamics’ Uni-Fuse infusion catheter features pressure response outlets, a proprietary, time-tested slit technology that provides a consistent, even distribution of fluid volume along the entire length of the infusion pattern, resulting in a 12-fold advantage over standard side-hole catheters.

We also offer the Pulse-Spray infusion system for high pressure, pulsed delivery of lytic agents to shorten treatment time, and the SpeedLyser infusion system built for dialysis grafts and fistulas.¹

Peripheral Products (Core)

We offer a comprehensive portfolio for minimally invasive peripheral products. Product categories include an extensive line of angiographic catheters and diagnostic and interventional guidewires, percutaneous drainage catheters and coaxial micro-introducer kits.

¹ Yusuf SW, et al. Immediate and Early Follow-up Results of Pulse Spray Thrombolysis in Patients with Peripheral Ischaemia. British Journal of Surgery 1995; 82:338-340.

Angiographic Products and Accessories

Angiographic products and accessories are used during peripheral diagnostic and interventional procedures. These products permit physicians to reach targeted locations to deliver contrast media for visualization purposes and therapeutic agents and devices, such as percutaneous transluminal angioplasty (PTA) balloons. Angiographic products consist of angiographic catheters and guidewires.

Our angiographic catheter line includes the following brands, all with radiopaque tips to assure excellent visibility under fluoroscopy:

•Soft-Vu flush catheters are available in flush and selective varieties. Flush catheters are used in procedures where a high flow of contrast is required for “big picture” diagnostics. Anomalies discovered through a flush angiogram may require further investigation into a vessel of interest. Soft-Vu selective catheters are used to gain access to smaller or more distal vessels and advance the catheter or wire into the diseased section.

•Accu-Vu sizing catheters feature radiopaque marker bands at the distal (farthest away) portion of the catheter to provide a highly accurate measurement of the patient’s anatomy. This enables precise measurement for interventional devices such as stents.

•AngiOptic catheters have total catheter radiopacity, ensuring tip-to-hub visibility. This catheter is also constructed with a firm tip material that enhances stability during high-flow injections, providing excellent pushability.

•Mariner catheters have a hydrophilic coating that, when combined with water, reduces friction. This makes insertion potentially easier and more comfortable for the patient, and can also be used for advancing through tortuous anatomy.

AngioDynamics guidewires include Nit-Vu (featuring a kink-resistant NiTi alloy core facilitating smooth navigation through tortuous vasculature and accurate wire control) and PTFE (Polytetrafluoroethylene) Coated diagnostic guidewires (fixed core and movable core).

AngioDynamics catheters and guidewires are available in more than 500 tip configurations and lengths.

Drainage Products

Drainage products percutaneously drain abscesses and other fluid pockets. An abscess is a tender inflamed mass that typically must be drained by a physician. AngioDynamics offers two brands of drainage catheters for multi-purpose/general, nephrostomy and biliary drainage: Total Abscession and Exodus. Each offer features and benefits depending on case presentation and physician preferences.

Micro Access Kits

Our Micro Access sets provide interventional physicians a smaller introducer system for minimally-invasive procedures. Our Micro Access product line provides physicians with the means to choose from the wide selection of configurations, including guidewire, needle and introducer options. Two lines are available in stiff/standard, 10cm or 15cm and echogenic for visibility under ultrasound guidance: Micro Introducer Kit and Ministick Max.

¹ Yusuf SW, et al. Immediate and Early Follow-up Results of Pulse Spray Thrombolysis in Patients with Peripheral Ischaemia. British Journal of Surgery 1995; 82:338-340.

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Venous Insufficiency

VenaCure EVLT laser system

Our VenaCure EVLT system products are used in endovascular laser procedures to treat superficial venous disease (varicose veins). Superficial venous disease is a malfunction of one or more valves in the leg veins whereby blood refluxes or does not return to the heart, thereby pooling in the legs and leading to symptoms such as pain, swelling and ulcerations. The VenaCure EVLT system uses laser energy to stop the reflux by ablating (collapsing and destroying) the affected vein. Blood is then re-routed to other healthy veins.

The procedure is minimally invasive and generally takes less than an hour, typically allowing the patient to quickly return to normal activities.

The VenaCure EVLT system is sold as a system that includes diode laser hardware and procedure kits which include disposable laser fiber components, an access sheath, access wires and needles. Our VenaCure EVLT 1470 nanometer wavelength laser allows physicians to more efficiently heat the vein wall using lower power settings thereby reducing the risk of collateral damage. The NeverTouch tip fiber eliminates laser tip contact with the vein wall, which in turn minimizes perforations of the vein wall that typically result in less pain and bruising as compared to traditional bare-tip fibers. The NeverTouch tip also maximizes ultrasonic visibility, making it easier for physicians to use. Procedure kits are available in a variety of lengths and configurations to accommodate varied patient anatomies.

The VenaCure EVLT system comes with a comprehensive physician training program and extensive marketing support.

Oncology/Surgery Products

AngioDynamics offers a range of comprehensive ablation technologies, including thermal tissue ablation systems (microwave energy and radiofrequency energy), surgical resection and the Irreversible Electroporation ("IRE") technology, the NanoKnife System, an innovative alternative to thermal ablation.

IRE Ablation

NanoKnife

The NanoKnife Ablation System is an alternative to traditional thermal ablation that received 510(k) clearance from the Food and Drug Administration for the surgical ablation of soft tissue. The NanoKnife Ablation System utilizes low energy direct current electrical pulses to permanently open pores in target cell membranes. These permanent pores or nano-scale defects in the cell membranes result in cell death. The treated tissue is then removed by the body’s natural processes in a matter of weeks, mimicking natural cell death. Unlike other ablation technologies, the NanoKnife Ablation System does not achieve tissue ablation using thermal energy.

The NanoKnife Ablation System consists of two major components: a Low Energy Direct Current, or LEDC Generator and needle-like electrode probes. Up to six (6) electrode probes can be placed into or around the targeted soft tissue. Once the probes are in place, the user enters the appropriate parameters for voltage, number of pulses, interval between pulses, and the pulse length into the generator user interface. The generator then delivers a series of short electric pulses between each electrode probe. The energy delivery is hyperechoic and can be monitored under real-time ultrasound.

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Microwave Ablation

Solero Microwave Tissue Ablation (MTA) System

The Solero MTA System features the Solero Microwave (MW) Generator and the specially designed Solero MW Applicators. The solid state Solero MW Generator with a 2.45 GHz operating frequency can power up to 140W for optimized power delivery and fast ablations. The Solero MW Applicator’s optimized ceramic tip diffuses MW energy nearly spherically, and its patented cooling channel with thermocouple provides real-time monitoring to help protect non-targeted tissue during the ablation. In addition, the Solero MTA System offers physicians scalability with a single applicator designed for multiple, predictable ablation volumes by varying time and wattage. Solero is a single applicator system able to complete up to a 5 cm ablation in six (6) minutes at maximum power.

The Solero MTA System and Accessories are indicated for the ablation of soft tissue during open procedures. The Solero MTA System is not intended for cardiac use.

Radiofrequency Ablation

StarBurst Radiofrequency Ablation Devices

Radiofrequency Ablation (RFA) products use radiofrequency energy to provide a minimally invasive approach to ablating solid cancerous or benign tumors. Our StarBurst Radiofrequency Ablation devices deliver radiofrequency energy to raise the temperature of cells above 45-50°C, causing cellular death. The physician inserts the disposable needle electrode device into the targeted body tissue, typically under ultrasound, CT or Magnetic Resonance Imaging (MRI) guidance.

During the procedure, our system automatically adjusts the amount of energy delivered in order to maintain the temperature necessary to ablate the targeted tissue. For a typical 5 cm ablation using our StarBurst Xli-enhanced disposable device, the ablation process takes approximately ten (10) minutes. The RFA system consists of a radiofrequency generator and a family of disposable devices.

In addition to thermal ablation systems and the NanoKnife Ablation System, AngioDynamics also offers Habib 4X Surgical Resection devices that are used in minimally invasive laparoscopic surgery procedures in surgical specialties such as Hepato-Biliary, GI, Surgical Oncology, Transplant Surgery and Urology (Partial Nephrectomy Resections). It is clinically indicated to assist in coagulation of tissue during intraoperative and laparoscopic procedures.

BioSentry Tract Sealant System

The BioSentry tract sealant system deploys a self-expanding hydrogel plug into the pleural space following a percutaneous lung biopsy, creating an airtight seal that closes the pleural puncture. Depth markings provide accurate and consistent placement based on CT-guided measurements, while the depth adjustment wheel and locking mechanisms ensure proper plug deployment. The hydrogel plug is made from a synthetic tissue-friendly polymer that fully reabsorbs into the body and the coaxial adapter mates with a coaxial needle to ensure a proper fit and delivery of the plug. The BioSentry Tract Sealant System is indicated for sealing pleural punctures to significantly reduce the risk of pneumothoraxes (air leaks) associated with percutaneous, transthoracic needle lung biopsies and to provide accuracy in marking a biopsy location for visualization during surgical resection.

IsoLoc Endorectal Balloon

The IsoLoc Endorectal Balloon's unique, customer-driven design is the result of collaborations with Radiation Oncologists, Therapists and Physicists with one goal in mind, to create a new standard for endorectal balloons (ERB) in the oncology space.

The design of the IsoLoc device not only addresses patient comfort, but also simplifies three challenging clinical scenarios that many physicians face when using radiation therapy for and/or in relation to the prostate. First, it's gas-release tip removes rectal gas and reduces prostate motion for gaseous patients. Secondly, the structure of the ERB aids in defining the anatomy for difficult planning scenarios with post-radical patients. Lastly, the IsoLoc device repositions and lifts the bowel in patients that have a low-lying bowel.

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Alatus Vaginal Balloon Packing System

The Alatus device was developed with the patient's comfort in mind and to assist the physician to move healthy tissue away from the radiation treatment field. Prior to the Alatus device, the clinician would push gauze into the vagina to move the bladder and bowel away from the radiation treatment field. Inserting gauze into the vagina can be uncomfortable before treatment and unpleasant at the end of treatment as it tends to dry out before removing.

Studies have shown, relative to traditional gauze packing, the Alatus device offers a more comfortable procedure for the patient, reduces the need for post-procedural pain medication and moves healthy tissue away from the radiation field.

Vascular Access Products

Our portfolio of Vascular Access products includes a broad offering of peripherally inserted central catheters (PICCs), midline catheters, implantable ports, dialysis catheters and related accessories and supplies. These products are used primarily to deliver short-term drug therapies, such as chemotherapeutic agents and antibiotics, into the central venous system. Delivery to the circulatory system allows drugs to mix with a large volume of blood as compared to intravenous drug delivery into a superficial vessel. Our Vascular Access product family also includes the proprietary BioFlo catheter and C3 Wave tip location.

BioFlo

AngioDynamics offers the BioFlo catheter, the only catheter on the market with Endexo Technology, a material more resistant to thrombus accumulation, in vitro (based on platelet count). Endexo Technology is a permanent and non-eluting polymer that is “blended” into the polyurethane from which the catheter is made. It is present throughout the catheter, including the extraluminal, intraluminal and cut catheter surface of the tip. Endexo Technology remains present for the life of the catheter. The BioFlo catheter’s long-term durability and efficacy is intended to provide clinicians a high degree of safety and confidence in providing better patient care and improved patient outcomes. BioFlo catheters are available across the Vascular Access family of products, including PICCs, midlines, ports and dialysis catheters.

Midlines

Midline catheters are inserted via the same veins used for PICC placement in the middle third of the upper arm; however, the midline catheter is advanced and placed so that the catheter tip is level or near the level of the axilla and distal to the shoulder. Our Midline product offerings include:

•BioFlo Midline: Our BioFlo Midline Catheter which incorporates Endexo Technology, is an effective solution to preserving a patient’s peripheral access. It provides a cost-effective alternative to multiple IV site rotations for patients who need short-term venous access.

PICCs

A peripherally inserted central catheter, or PICC, is a long thin catheter that is inserted into a peripheral vein, typically in the upper arm, and advanced until the catheter tip terminates in a large vein in the chest near the heart to obtain intravenous access. PICCs can typically be used for prolonged periods of time and provide an alternative to central venous catheters. Our PICC product offerings include:

•BioFlo PICC: Our BioFlo PICC line is the only power injectable PICC available that incorporates Endexo Technology into the manufacturing and design of the catheter. Advanced features such as large lumen diameters allow the BioFlo PICC to deliver the power injection flow rates required for contrast-enhanced Computed Tomography (CT) scans compatible with up to 325 psi CT injections.

•Xcela PICC: The Xcela PICC line is designed to provide a high degree of safety, ease and confidence in patient care. Advanced features such as large lumen diameters allow the Xcela PICC to deliver the power injection flow rates required for contrast-enhanced CTs compatible with up to 325 psi CT injections.

•PASV Valve Technology: The PASV Valve Technology is available in both BioFlo and Xcela lines and is designed to automatically resist backflow and reduce blood reflux that could lead to catheter-related complications.

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C3 Wave PICC tip location system

The C3 Wave system is our innovative, wireless, app-based ECG system eliminates the need for a confirmatory chest x-ray of PICC tip placement, allowing greater patient access to the Company’s proprietary BioFlo PICCs.

Ports

Ports are implantable devices utilized for the central venous administration of a variety of medical therapies and for blood sampling and diagnostic purposes. Central venous access facilitates a more systemic delivery of treatment agents, while mitigating certain harsh side effects of certain treatment protocols and eliminating the need for repeated access to peripheral veins. Depending upon needle gauge size and the port size, a port can be utilized for up to approximately 2,000 accesses once implanted in the body. Our ports are used primarily in systemic or regional short- and long-term cancer treatment protocols that require frequent infusions of highly concentrated or toxic medications (such as chemotherapy agents, antibiotics or analgesics) and frequent blood samplings. Our port products and accessories include:

•BioFlo Port: Our BioFlo Port was the first port available featuring a catheter with Endexo Technology. Advanced features of the BioFlo Port include multiple profile and catheter options, a large septum area for ease of access and the ability to administer contrast through a CT injection for purposes of imaging.

•SmartPort, SmartPort+, SmartPort Plastic: The SmartPort power-injectable port with Vortex technology offers the ability for a clinician to access a vein for both the delivery of medications or fluids and for administering power-injected contrast to perform a CT scan. The ability to access a port for power-injected contrast studies eliminates the need for additional needle sticks in the patient’s arm and wrist veins. Once implanted, repeated access to the bloodstream can be accomplished with greater ease and less discomfort. Our SmartPort port line is available in standard, mini and low-profiles to accommodate more patient anatomies. The SmartPort+ port line combines Vortex technology with BioFlo catheters. In addition to the three titanium port body sizes, there is a plastic port body.

•Vortex: Our Vortex port technology line of ports is a clear-flow port technology that, we believe, revolutionized port design. With its rounded chamber, the Vortex port is designed to have no sludge-harboring corners or dead spaces. This product line consists of titanium, plastic and dual-lumen offerings.

•PASV Valve Technology: The PASV Valve Technology is designed to automatically resist backflow and reduce blood reflux that could lead to catheter-related complications.

•LifeGuard: The LifeGuard Safety Infusion Set and The LifeGuard Vision are used to infuse our ports and complement our port and vascular access catheters. The needles’ low profile design is intended to allow clinicians to easily dress the site.

Dialysis Products

We market an extensive line of dialysis products that provide short and long-term vascular access for dialysis patients. Dialysis, or cleaning of the blood, is necessary in conditions such as acute renal failure, chronic renal failure and end-stage renal disease (ESRD). We currently offer a variety of dialysis catheters, including:

•BioFlo DuraMax: Our BioFlo DuraMax dialysis catheter is the only dialysis catheter with Endexo Technology. Advanced features of the BioFlo DuraMax dialysis catheter include large inner diameter lumens designed for long term patency, a proprietary guidewire lumen to facilitate catheter exchanges and Curved Tip Technology that allows the catheter to self-center in the Superior Vena Cava (SVC).

•DuraMax: The DuraMax catheter is a stepped-tip catheter designed to improve ease of use, dialysis efficiency and overall patient outcomes.

In addition, AngioDynamics also offers other renal therapies, including our DuraFlow Chronic Hemodialysis Catheter, Schon Chronic Hemodialysis Catheter, EVENMORE Chronic Hemodialysis Catheter, EMBOSAFE Valved Splitable Sheath Dilator and Perchik Button Suture Retention Device.

RESEARCH & DEVELOPMENT

Our growth depends in large part on the continuous introduction of new and innovative products, together with ongoing enhancements to our existing products. This happens through internal product development, technology licensing, strategic alliances and acquisitions. Our R&D teams work closely with our marketing teams, sales force and regulatory and compliance teams to incorporate customer feedback into our development and design process. We believe that we have a reputation among interventional physicians as a strong partner for developing high quality products because of our tradition of close physician collaboration, dedicated market focus, responsiveness and execution capabilities for product development and commercialization. We recognize the importance of, and intend to continue to make investments in, research and development (R&D).

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COMPETITION

We encounter significant competition across our product lines and in each market in which our products are sold. These markets are characterized by rapid change resulting from technological advances, scientific discoveries and changing customer needs and expectations. We face competitors, ranging from large manufacturers with multiple business lines, to small manufacturers that offer a limited selection of products.

Our primary device competitors include: Boston Scientific Corporation; Cook Medical; Medical Components, Inc. (MedComp); TeleFlex Medical; Becton Dickinson; Smiths Medical, a subsidiary of Smiths Group plc; Medtronic; Merit Medical; Terumo Medical Corporation; Johnson and Johnson; Philips Healthcare; Inari Medical; Varian Medical Systems and Total Vein Systems.

We believe our products compete primarily based on their quality, clinical outcomes, ease of use, reliability, physician familiarity and cost-effectiveness. In the current environment of managed care, which is characterized by economically motivated buyers, consolidation among health care providers, increased competition and declining reimbursement rates, we have been increasingly required to compete on the basis of price. We believe that our continued competitive success will depend upon our ability to develop or acquire scientifically advanced technology, apply our technology cost-effectively across product lines and markets, attract and retain skilled personnel, obtain patent or other protection for our products, obtain required regulatory and reimbursement approvals, manufacture and successfully market our products either directly or through outside parties, and maintain sufficient inventory to meet customer demand.

SALES AND MARKETING

We sell our broad line of quality devices in the United States primarily through a direct sales force and internationally through a combination of direct sales and distributor relationships. We support our customers and sales organization with a marketing staff that includes product managers, customer service representatives and other marketing specialists. We focus our sales and marketing efforts on interventional radiologists, interventional cardiologists, vascular surgeons, urologists, interventional and surgical oncologists and critical care nurses.

MANUFACTURING

We manufacture certain proprietary components and products and then assemble, inspect, test and package our finished products. By designing and manufacturing many of our products from raw materials, and assembling and testing our subassemblies and products, we believe that we are able to maintain better quality control, ensure compliance with applicable regulatory standards and our internal specifications, and limit outside access to our proprietary technology. We have custom-designed proprietary manufacturing and processing equipment and have developed proprietary enhancements for existing production machinery.

We manufacture most of our products from two owned manufacturing properties, one in Queensbury, NY and one small facility in Glens Falls, NY, providing capabilities which include manufacturing, service, offices, engineering and research and we lease distribution warehouses. These facilities are registered with the FDA and have been certified to ISO 13485 standards. ISO 13485 is a quality system standard that satisfies European Union regulatory requirements, thus allowing us to market and sell our products in European Union countries. AngioDynamics is certified under the Medical Device Single Audit Program ("MDSAP") which allows a recognized auditing organization to conduct a single regulatory audit of a medical device manufacturer to satisfy the relevant requirements of the regulatory authorities participating in the program. International partners that are participating in the MDSAP include:

•Therapeutic Goods Administration of Australia

•Brazil’s Agência Nacional de Vigilância Sanitária

•Health Canada

•Japan’s Ministry of Health, Labour and Welfare, and the Japanese Pharmaceuticals and Medical Devices Agency

•U.S. Food and Drug Administration

Our manufacturing facilities are subject to periodic inspections by regulatory authorities to ensure compliance with domestic and non-U.S. regulatory requirements. See “Government Regulation” section of this Item 1 for additional information. See Part I, Item 2 "Properties" of this report for details on each manufacturing location.

BACKLOG

Historically, we ship the majority of products within 24-48 hours of receiving an order.

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 INTELLECTUAL PROPERTY

Patents, trademarks and other proprietary rights are very important to our business. We also rely upon trade secrets, manufacturing know-how, technological innovations and licensing opportunities to maintain and improve our competitive position. We regularly monitor and review third-party proprietary rights, including patents and patent applications, as available, to aid in the development of our intellectual property strategy, avoid infringement of third-party proprietary rights, and identify licensing opportunities. The Company owns an extensive portfolio of patents and patent applications in the United States and in certain foreign countries. The portfolio also includes exclusive licenses to third party patents and applications. Most of our products are sold under the AngioDynamics trade name or trademark. Additionally, products are sold under product trademarks and/or registered product trademarks owned by AngioDynamics, Inc., or an affiliate or subsidiary. Some products contain trademarks of companies other than AngioDynamics.

See Part I. Item 3 "Legal Proceedings" and Note 17 to the consolidated financial statements in this Annual Report on Form 10-K for additional details on litigation regarding proprietary technology.

LITIGATION

We operate in an industry characterized by extensive patent litigation. Patent litigation can result in significant damage awards and injunctions that could prevent the manufacture and sale of affected products, or result in significant royalty payments in order to continue selling those products. The medical device industry is also susceptible to significant product liability claims. These claims may be brought by individuals seeking relief on their own behalf or purporting to represent a class. In addition, product liability claims may be asserted against us in the future based on events we are not aware of at the present time. At any given time, we are involved in a number of product liability actions. For additional information, see both Part I. Item 3 "Legal Proceedings" and Note 17 to the consolidated financial statements in this Annual Report on Form 10-K.

GOVERNMENT REGULATION

The products we manufacture and market are subject to regulation by the United States Food and Drug Administration (FDA) under the Federal Food, Drug, and Cosmetic Act, or FDCA, and international regulations in our specific target markets.

United States FDA Regulation

Before a new medical device can be introduced into the market, a manufacturer generally must obtain marketing clearance or approval from the FDA through either a 510(k) submission (a premarket notification) or a premarket approval application (PMA).

The 510(k) procedure is available only in particular circumstances. The 510(k) clearance procedure is available only if a manufacturer can establish that its device is “substantially equivalent” in intended use and in safety and effectiveness to a “predicate device,” which is a legally marketed device with 510(k) clearance in class I or II or pre-amendment status based upon products commercially distributed on or before May 28, 1976. After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, requires a new 510(k) clearance. The 510(k) clearance procedure including questions and responses may take up to 12 months. In some cases, supporting clinical data may be required. The FDA may determine that a new or modified device is not substantially equivalent to a predicate device or may require that additional information, including clinical data, be submitted before a determination is made, either of which could significantly delay the introduction of new or modified device products. If a device cannot demonstrate substantial equivalence, it may be subject to either a de novo submission or a PMA.

The PMA application procedure is more comprehensive than the 510(k) procedure and typically takes more time to complete. The PMA application must be supported by scientific evidence providing pre-clinical and clinical data relating to the safety and efficacy of the device and must include other information about the device and its components, design, manufacturing and labeling. The FDA will approve a PMA application only if reasonable assurance that the device is safe and effective for its intended use can be provided. As part of the PMA application review, the FDA will inspect the manufacturer’s facilities for compliance with its Quality System Regulation, or QSR. As part of the PMA approval the FDA may place restrictions on the device, such as requiring additional patient follow-up for an indefinite period of time. If the FDA’s evaluation of the PMA application or the manufacturing facility is not favorable, the FDA may deny approval of the PMA application or issue a “not approvable” letter. The FDA may also require additional clinical trials, which can delay the PMA approval process by several years. After the PMA is approved, if significant changes are made to a device, its manufacturing or labeling, a PMA supplement containing additional information must be filed for prior FDA approval.

Historically, our products have been introduced into the market using the 510(k) procedure.

The process of FDA submissions requires extensive validations and testing which requires a significant amount of time and financial resources. Recent changes in both regulations and FDA perspectives have increased both time and testing

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requirements, which have caused and are expected to continue to cause significant delays and increased costs for clearances and approvals. The increased focus by the FDA on such issues as chemical identification of all colorants, non-acceptance of certain colorants (certain forms of carbon black) and other concerns, continue to cause challenges and delays. In addition, changes to existing products call into question previously approved devices and result in additional costs for testing and material analysis.

The devices manufactured by us are also subject to the QSR, which imposes elaborate testing, control, documentation and other quality assurance procedures. Every phase of production, including raw materials, components and subassembly, manufacturing, testing, quality control, labeling, tracing of consignees after distribution and follow-up and reporting of complaint information is governed by the FDA’s QSR. Device manufacturers are required to register their facilities and list their products with the FDA and certain state agencies. The FDA periodically inspects manufacturing facilities and, if there are alleged violations, the operator of a facility must correct them or satisfactorily demonstrate the absence of the violations or face regulatory action. Failure to maintain compliance with the QSR may result in the issuance of one or more Forms 483 or warning letters, and could potentially result in a consent decree. Failure to maintain the QSR appropriately could result in the issuance of further warning letters. In addition, non-compliance with applicable FDA requirements can result in, among other things, fines, injunctions, civil penalties, recall or seizure of products, total or partial suspension of production, failure of the FDA to grant marketing approvals, inability to obtain clearances or approvals for products, withdrawal of marketing approvals, a recommendation by the FDA to disallow us to enter into government contracts, and/or criminal prosecutions. The FDA also has the authority to request repair, replacement or refund of the cost of any device manufactured or distributed by us.

Other U.S. Regulatory Bodies

We and our products are subject to a variety of state and local laws in those jurisdictions where our products are, or will be, marketed. We and our products are also subject to a variety of federal, state and local laws relating to matters such as safe working conditions, manufacturing practices, environmental protection, fire hazard control and disposal of hazardous or potentially hazardous substances. In addition, we are subject to various federal and state laws governing our relationships with the physicians and others who purchase or make referrals for our products. For instance, federal law prohibits payments of any form that are intended to induce a referral for any item payable under Medicare, Medicaid or any other federal healthcare program. Many states have similar laws. There can be no assurance that we will not be required to incur significant costs to comply with such laws and regulations now or in the future, or that such laws or regulations will not have a material adverse effect upon our ability to do business.

International Regulation

Internationally, all of our current products are considered medical devices under applicable regulatory regimes, and we anticipate that this will be true for all of our future products. Sales of medical devices are subject to regulatory requirements in many countries. The regulatory review process may vary greatly from country to country. For example, the European Union has a dedicated set of regulations regarding medical devices, specifically regulating their design, manufacturing, clinical trials, labeling and adverse event reporting. Devices that comply with those requirements are entitled to bear a Conformité Européenne, or CE Mark, indicating that the device conforms to the essential requirements of the applicable directives and can be commercially distributed in countries that are members of the European Union. Similar regulations are in place for Canada, Japan, China and most other countries. In some cases, we rely on our international distributors to obtain regulatory approvals, complete product registrations, comply with clinical trial requirements and complete those steps that are customarily taken in the applicable jurisdictions.

International sales of medical devices manufactured in the United States that are not approved or cleared by the FDA for use in the United States, or are banned or deviate from lawful performance standards, are subject to FDA export requirements. Before exporting such products to a foreign country, we must first comply with the FDA’s regulatory procedures for exporting unapproved devices.

The process of obtaining approval to distribute medical products is costly and time-consuming in virtually all the major markets where we sell medical devices. We cannot assure that any new medical devices we develop will be approved in a timely or cost-effective manner or approved at all. There can be no assurance that new laws or regulations regarding the release or sale of medical devices will not delay or prevent sale of our current or future products.

THIRD-PARTY REIMBURSEMENT AND ANTI-FRAUD AND CORRUPT PRACTICES REGULATION

United States

The delivery of our devices is subject to regulation by the Department of Health and Human Services (HHS) and comparable state and non-U.S. agencies responsible for reimbursement and regulation of health care items and services. U.S. laws and regulations are imposed primarily in conjunction with the Medicare and Medicaid programs, as well as the government’s interest in regulating the quality and cost of health care. Foreign governments also impose regulations in conjunction with their health care reimbursement programs and the delivery of health care items and services.

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U.S. federal health care laws apply when we or customers submit claims for items or services that are reimbursed under Medicare, Medicaid, or other federally-funded health care programs. The principal U.S. federal laws include: (1) the Anti-kickback Statute which prohibits offers to pay or receive remuneration of any kind for the purpose of including or rewarding referrals of items or services reimbursable by a federal health care program, subject to certain safe harbor exceptions; (2) the False Claims Act which prohibits the submission of false or otherwise improper claims for payment to a federally-funded health care program, including claims resulting from a violation of the Anti-kickback Statute; (3) the Stark law which prohibits physicians from referring Medicare or Medicaid patients to a provider that bills these programs for the provision of certain designated health services if the physician (or a member of the physician’s immediate family) has a financial relationship with that provider; and (4) health care fraud statutes that prohibit false statements and improper claims to any third-party payer. There are often similar state false claims, anti-kickback, and anti-self-referral and insurance laws that apply to state-funded Medicaid and other health care programs and private third-party payers. In addition, the U.S. Foreign Corrupt Practices Act (FCPA) can be used to prosecute companies in the U.S. for arrangements with physicians or other parties outside the U.S. if the physician or party is a government official of another country and the arrangement violates the law of that country.

International

Our success in international markets will depend largely upon the availability of reimbursement from the third-party payors through which healthcare providers are paid in those markets. Reimbursement and healthcare payment systems vary significantly by country. The main types of healthcare payment systems are government sponsored healthcare and private insurance. Reimbursement approval must be obtained individually in each country in which our products are marketed. Outside the U.S., we generally rely on our distributors to obtain reimbursement approval in the countries in which they will sell our products. There can be no assurance that reimbursement approvals will be received. See Part I. Item 1A "Risk Factors" in this Annual Report on Form 10-K.

INSURANCE

Our product liability insurance coverage is limited to a maximum of $10 million per product liability claim and an annual aggregate policy limit of $10 million, subject to a self-insured retention of $500,000 per occurrence and $2 million in the aggregate. The policy covers, subject to policy conditions and exclusions, claims of bodily injury and property damage from any product sold or manufactured by us.

There is no assurance that this level of coverage is adequate. We may not be able to sustain or maintain this level of coverage and cannot assure you that adequate insurance coverage will continue to be available on commercially reasonable terms, or at all. A successful product liability claim or other claim, with respect to uninsured or underinsured liabilities, could have a material adverse effect on our business. See Part I. Item 1A "Risk Factors" in this Annual Report on Form 10-K.

ENVIRONMENTAL, HEALTH AND SAFETY

We are subject to federal, state and local laws, rules, regulations and policies governing the use, generation, manufacture, storage, air emission, effluent discharge, handling and disposal of certain hazardous and potentially hazardous substances used in connection with our operations. Our operations are also subject to laws and regulations related to occupational health and safety. We maintain safety, training and maintenance programs as part of our ongoing efforts to ensure compliance with applicable laws and regulations. Although we believe that we have complied with environmental, health and safety laws and regulations in all material respects and, to date, have not been required to take any action to correct any noncompliance, there can be no assurance that we will not be required to incur significant costs to comply with environmental regulations in the future.

EMPLOYEES

As of May 31, 2021, we had approximately 800 full time employees. None of our employees are represented by a labor union and we have never experienced a work stoppage. In the highly competitive medical device industry, we consider attracting, developing, and retaining talented people in technical, operational, marketing, sales, research, management and other positions to be critical to our long-term growth strategy. Our ability to recruit and retain such talent depends on several factors, including compensation and benefits, talent development, career opportunities and work environment. Our goal is to create a diverse and inclusive culture that encourages an environment where employees feel welcomed, respected and valued. We are an equal opportunity/affirmative action employer committed to making employment decisions without regard to race, religion, ethnicity or national origin, gender, sexual orientation, gender identity or expression, age, disability, protected veteran status or any other characteristics protected by law.

The engagement of our workforce is crucial to delivering on our competitive strategy, and we place high importance on informed and engaged employees. We communicate frequently and transparently with our employees through a variety of communication methods, including video and written communications, town hall meetings and our company intranet. As a result of the COVID-19 pandemic, we also further strengthened our communication platforms. Our employee communications

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during the pandemic have kept our employees informed on critical priorities, important actions being taken by management in response to the pandemic and continued efforts to protect employee health, safety and well-being.

Executive Officers of the Company

The following table sets forth certain information with respect to our executive officers.

Name	Age	Position
James C. Clemmer	57	President and Chief Executive Officer
Stephen A. Trowbridge	47	Executive Vice President and Chief Financial Officer
Marna Bronfen-Moore	54	Senior Vice President, Human Resources
Chad T. Campbell	50	Senior Vice President and General Manager, Vascular Access
Scott Centea	43	Senior Vice President and General Manager, Endovascular Therapies
Benjamin H. Davis	56	Senior Vice President, Business Development
David D. Helsel	57	Senior Vice President, Global Operations
Warren G. Nighan	52	Senior Vice President, Quality and Regulatory Affairs
Laura Piccinini	51	Senior Vice President and General Manager, International
Richard Rosenzweig	54	Senior Vice President, General Counsel and Secretary

James C. Clemmer became our President and Chief Executive Officer in April 2016. Prior to joining AngioDynamics, Mr. Clemmer served as President of the $1.8 billion medical supplies segment at Covidien plc. where he directed the strategic and day-to-day operations for global business divisions that collectively manufactured 23 different product categories. In addition, he managed global manufacturing, research and development, operational excellence, business development and all other functions associated with the medical supplies business. Prior to his role at Covidien, Mr. Clemmer served as Group President at Kendall Healthcare (which was acquired by Tyco International in 1994), where he managed the U.S. business across five divisions and built the strategic plan for the medical supplies segment before Covidien was spun off from Tyco. Mr. Clemmer began his career at Sage Products, Inc. Mr. Clemmer currently serves on the Board of Directors for AngioDynamics and previously served on the Board of Directors for Lantheus Medical Imaging. Mr. Clemmer is a graduate of the Massachusetts College of Liberal Arts, where he served as interim president from August 2015 until March 2016.

Stephen A. Trowbridge was appointed Executive Vice President and Chief Financial Officer in February 2020, having served as Interim Chief Financial Officer since October 2019. Prior to his appointment as Chief Financial Officer, he served as the Company’s Senior Vice President and General Counsel. He joined AngioDynamics in June 2008 as Corporate Counsel. In addition to serving as the Company’s CFO and managing the finance functions, Mr. Trowbridge also managed the Legal function on an interim basis until January 30, 2021. Prior to AngioDynamics, Mr. Trowbridge served as Corporate Counsel at Philips Healthcare and Intermagnetics General Corporation. Mr. Trowbridge began his career with Cadwalader, Wickersham & Taft LLP in the firm’s Mergers and Acquisitions and Securities Group. Mr. Trowbridge received a Bachelor of Science in Science and Technology Studies from Rensselaer Polytechnic Institute, a Juris Doctor from the University of Pennsylvania Law School, and a Master of Business Administration from Duke University’s Fuqua School of Business.

Marna I. Bronfen-Moore joined AngioDynamics as the Senior Vice President of Human Resources in September 2019 bringing with her over 20 years of experience in the medical device industry. Prior to joining AngioDynamics, Ms. Bronfen-Moore spent almost three years at Hologic as the Vice President, Global Human Resources, for both the Corporate Functions and Asia Pacific. Before Hologic, Ms. Bronfen-Moore served as Vice President, Human Resources for Global Operations, Quality, and Regulatory at Haemonetics, Director, Human Resources for Boston Scientific, and in various leadership roles of increasing responsibility at C. R. Bard, Inc. Ms. Bronfen-Moore began her professional career as the Head of Human Resources for Burrows Paper Corporation. Ms. Bronfen-Moore holds a Bachelor of Arts degree from Purdue University in Psychology, Master of Science in Industrial/Organizational Psychology from Rensselaer Polytechnic Institute, and completed all of the coursework requirements for a PhD in Management from Rensselaer Polytechnic Institute.

Chad T. Campbell joined AngioDynamics in May 2016 as the Senior Vice President and General Manager for the Vascular Access Global Business Unit. In his role, Mr. Campbell oversees research and development and global commercialization of the Global Business Unit’s portfolio. Mr. Campbell joined AngioDynamics from Medtronic where he served as the Vice President of Marketing for the Patient Care and Safety business after serving as the Vice President of Marketing for the SharpSafety business at Covidien (Medtronic). During his tenure at Covidien, Mr. Campbell also held roles including Director of Marketing, Area Vice President of Sales, Region Manager, Product Manager and Account Manager. Mr. Campbell received a Bachelor of Arts from the University of Kentucky.

Scott Centea joined AngioDynamics in 2005 as a sales representative serving the Carolinas. During his tenure, he has served in a variety of positions with increased responsibility including VP of Corporate Accounts where he was in charge of

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leading a team of individuals to execute Health System Purchasing Contracts. From there Mr. Centea assumed the role of VP of Marketing for Endovascular Therapies, before being promoted into his most recent and current role as Sr. Vice President/General Manager of Endovascular Therapies and Peripheral Artery Disease. Mr. Centea currently holds board positions with the American Venous Forum (AVF) and the Capital District American Heart Association. Mr. Centea holds a Bachelor of Arts in Communications from Newberry College.

Benjamin H. Davis joined AngioDynamics as Senior Vice President of Business Development in March 2015. Prior to joining AngioDynamics, Mr. Davis most recently was the Vice President of Business Integration at C. R. Bard, Inc. where he also served as the Divisional Head of Business Development from 2004-2013. Before joining C. R. Bard, Inc., Mr. Davis held the position of Chief Financial Officer and Treasurer at Axya Medical Inc. He holds a Bachelor of Science in Business Administration from Bryant College and Master in Business Administration in Finance from Bentley University Graduate School of Business.

David D. Helsel currently serves as Senior Vice President of Global Operations and has been with AngioDynamics since December 2017. Prior to joining AngioDynamics he was Senior Vice President, Global Supply Chain, at Hill-Rom Holdings for almost three years. Before that, Mr. Helsel worked at Haemonetics for three years where he served as Executive Vice President for Global Manufacturing and also spent almost nineteen years in various positions with increasing responsibility at Covidien, including Vice President of Operations for the Surgical Solutions Division and Medical Supplies Division. An expert in Lean and Six Sigma, Mr. Helsel also served as Global Director of Operational Excellence, supporting sixty-three manufacturing facilities. Mr. Helsel holds a Bachelor of Science in Mechanical Engineering from LeTourneau University.

Warren G. Nighan joined AngioDynamics as the Senior Vice President of Quality and Regulatory Affairs in April 2017. Before joining AngioDynamics, Mr. Nighan was a quality and regulatory consultant to clients in FDA-regulated industries, specializing in execution and management of quality systems implementation and remediation. Previously, Mr. Nighan served as the Executive Vice President of Global Clinical, Quality Affairs and Regulatory Affairs at Haemonetics Corporation, Vice President of Quality/Regulatory/Clinical/Technical Services at St. Jude Medical’s Atrial Fibrillation Division, and Corporate Vice President of Quality/Compliance at Tyco Healthcare/Covidien (Medtronic). Mr. Nighan earned a Bachelor and Master of Science in Nursing from Northeastern University’s Bouvé College of Health Sciences.

Laura Piccinini joined AngioDynamics as Senior Vice President and General Manager for International in June 2021. Ms. Piccinini brings more than 25 years of experience in leadership roles in the Medical Device industry, with an extensive background in the field of respiratory and surgical care. From June 2020 to June 2021, she served as CEO and a member of the Board of Directors for Respiratory Motion, Inc. Prior to that, from 2017 to 2020, she served as Global Head of Commercial Operations for the Implants business unit at Nobel Biocare Systems, then a Danaher subsidiary now part of Envista Holdings. From 2015 to 2017, Ms. Piccinini served as President of EMEA at Covidien and prior to that at Stryker. Ms. Piccinini is a graduate of the Parma University of Medicine, where she received a nursing degree with specializations in ICU, Anesthesia, and First Aid as a Helicopter Flight Coordinator.

Richard C. Rosenzweig joined AngioDynamics as Senior Vice President General Counsel and Secretary in February 2021. Mr. Rosenzweig brings to his role more than 20 years of experience in executive leadership providing legal guidance, governance and compliance oversight, and strategic business direction to global medical device and health care companies, including C. R. Bard for more than ten years where he most recently served as Vice President, Law, and Assistant Secretary, Phibro Animal Health Corporation and Impath, Inc. as Senior Vice President, General Counsel and Secretary, and Johnson & Johnson as Director, Licensing and Acquisitions. Prior to AngioDynamics, Mr. Rosenzweig advised companies in the medical device industry as an independent consultant on corporate development initiatives. Mr. Rosenzweig received his Bachelor of Arts in Psychology from Brandeis University and his Juris Doctor from Boston University School of Law. He is an advisor to TEAMFund, an impact investment fund, serves as Vice Chair and Chair-Elect of the Director’s Leadership Council of the Rutgers Cancer Institute of New Jersey, and is a member of the Director’s Leadership Council for Rutgers Biomedical and Health Sciences, an academic medical center.

AVAILABLE INFORMATION

Our corporate headquarters is located at 14 Plaza Drive, Latham, New York 12110. Our phone number is (518) 795-1400. Our website is www.angiodynamics.com.

We make available, free-of-charge through our website, our Annual Reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after we electronically file or furnish such materials to the SEC. In addition, our website includes, among other things, charters of the various committees of our Board of Directors and our code of business conduct and ethics applicable to all employees, officers and directors. Within the time period required by the SEC, we will post on our website any amendment to the code of business conduct and ethics and any waiver applicable to any executive officer, director or senior financial officer. We use our website as a means of disclosing material non-public

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information and for complying with our disclosure obligations under Regulation FD. Accordingly, investors should monitor our website, in addition to following our press releases, SEC filings and public conference calls and webcasts. We use these channels as well as social media and blogs to communicate with the public about our company, our services and other issues. It is possible that the information we post on social media and blogs could be deemed to be material information. Therefore, we encourage investors, the media, and others interested in our Company to review the information we post on the social media channels and blogs listed on our website. Any stockholder also may obtain copies of these documents, free of charge, by sending a request in writing to our Corporate headquarters, Attention: Saleem Cheeks. Information on our website or connected to our website is not incorporated by reference into this Annual Report on Form 10-K.

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Item 1A. Risk Factors.

In addition to the other information contained in this Annual Report on Form 10-K and in our other filings with the Securities and Exchange Commission, the following risk factors should be considered carefully by investors in evaluating our business. Our financial and operating results are subject to a number of risks and uncertainties, including those set forth below, many of which are not within our control. Our business, financial condition, results of operations and/or liquidity could be materially and adversely affected by any of these risks or by additional risks not presently known to us or that we currently deem immaterial.

RISKS RELATED TO OUR BUSINESS AND INDUSTRY

We face intense competition in the medical device industry which continues to experience consolidation. We may be unable to compete effectively with respect to technological innovation and price which may have a material adverse effect on our revenues, financial condition, results of operations and/or liquidity.

The markets for our products are highly competitive and we expect competition to continue to intensify. The medical device industry is characterized by rapid technological change, frequent product introductions and evolving customer requirements. Our customers consider many factors when choosing products, including technology, features and benefits, quality, reliability, ease of use, clinical or economic outcomes, availability, price and customer service. We face competition globally from a wide range of companies, many of whom have substantially greater financial, marketing and other resources than us. We may not be able to compete effectively, and we may lose market share to our competitors. Our primary device competitors include: Boston Scientific Corporation; Cook Medical; Medical Components, Inc. (MedComp); TeleFlex Medical; Becton Dickinson; Smiths Medical, a subsidiary of Smiths Group plc; Medtronic; Merit Medical; Terumo Medical Corporation; Johnson and Johnson; Philips Healthcare; Inari Medical; Varian Medical Systems and Total Vein Systems.

Our competitors may succeed in adapting faster than us to changing customer needs or requirements, in developing and introducing technologies and products earlier, in obtaining patent protection (which could create barriers to market entry for us) or regulatory clearance earlier, or in commercializing new products or technologies more rapidly than us. Our competitors may also develop products and technologies that are superior to ours or that otherwise could render our products obsolete or noncompetitive. The trend of increased consolidation in the medical technology industry has resulted in companies with greater scale and market power, intensifying competition and increasing pricing pressure. We may also face competition from providers of other medical therapies, such as pharmaceutical companies, that may offer non-surgical therapies for conditions that are currently, or in the future may be, treated using our products. If we are not able to compete effectively, our market share and revenue may decline.

In addition, the increasing purchasing power of health systems, group purchasing organizations (“GPOs”) and integrated health delivery networks (“IDNs”), together with increased competition and declining reimbursement rates, has resulted increasingly with the Company competing on the basis of price. Due to the highly competitive nature of the GPO and IDN contracting processes, we may not be able to obtain market prices for our products or obtain or maintain contract positions with major GPOs and IDNs, which could adversely impact our profitability. Also, sales through a GPO or IDN can be significant to our business and our inability to retain contracts with our customers, or acquire additional contracts, could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

Our inability to continue to effectively develop, acquire and/or market new products and technologies could have a material adverse effect on our business, financial condition and/or results of operations.

The market for our devices is characterized by rapid technological change, new product introductions, technological improvements, changes in physician requirements and evolving industry standards. Product life cycles are relatively short because medical device manufacturers continually develop more effective and less expensive versions of existing devices in response to physician demand. We engage in product development and improvement programs to maintain and improve our competitive position. Our products are technologically complex and these programs involve significant planning, market studies, investment in research and development, clinical trials and regulatory clearances or approvals and may require more time and expense than anticipated to bring such products to market. We may not, however, be successful in enhancing existing products, or developing new products or technologies that will achieve regulatory approval, be developed or manufactured in a cost-effective manner, obtain appropriate intellectual property protection or receive market acceptance. We also may be unable to recover all or a meaningful part of our investment in these products or technologies. Additionally, there can be no assurance that the size of the markets in which we compete will increase above existing levels or not decline, that we will be able to maintain, gain or regain market share or that we can compete effectively on the basis of price or that the number of procedures in which our products are used will increase above existing levels or not decline.

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In particular, the future prospects of many of our high growth products, such as the NanoKnife system, the AngioVac system and the Auryon system, rely on continued market development and continued generation of clinical data pursuant to clinical trials conducted by us, our competitors or other third parties. If the results of these trials are not what we expect or fail to generate meaningful clinical data, it may adversely impact our ability to obtain product approvals. If any of these products fail to achieve clinical acceptance or are perceived unfavorably by the market, it could severely limit our ability to drive revenue growth, which could have a material adverse effect on our business, financial condition, results of operations and/or liquidity. See Risk Factor titled “Our business and prospects rely heavily upon our ability to successfully complete clinical trials, including our NanoKnife DIRECT Clinical study, our Auryon Pathfinder study and clinical studies for AngioVac. We may choose to, or may be required to, suspend, repeat or terminate our clinical trials if they are not conducted in accordance with regulatory requirements, the results are negative or inconclusive or the trials are not well designed.”

As part of our business strategy, we expect to continue to engage in business development activities which includes selectively evaluating and pursuing the acquisition of complementary businesses, technologies and products. These activities may result in substantial investment of our time and financial resources and competition for targets may be significant. We may not be able to identify appropriate acquisition candidates, consummate transactions, obtain agreements with favorable terms or obtain any necessary financing or regulatory approvals. Further, once a business is acquired, any inability to successfully integrate the business or achieve anticipated cost savings or operating synergies, decreases in customer loyalty or product orders, failure to retain and develop its workforce, failure to establish and maintain appropriate controls, higher or unanticipated expenses, or unknown or contingent liabilities could adversely affect our ability to realize the anticipated benefits of any acquisition. The evaluation and integration of an acquired business, whether or not successful, requires significant efforts which may result in additional expenses and divert the attention of our management and technical personnel from other projects.

If we proceed with one or more significant acquisitions in which the consideration consists of cash, a substantial portion of our available cash could be used to consummate the acquisitions. If we consummate one or more acquisitions in which the consideration consists of capital stock, our stockholders could suffer significant dilution of their interest in us. In addition, we could incur or assume significant amounts of indebtedness in connection with acquisitions. These transactions are inherently risky and may not enhance our financial position or results of operations or create value for our shareholders as they are based on projections and assumptions which are uncertain and subject to change and there can be no assurance that any past or future transaction will be successful.

If we fail to develop and successfully manufacture and launch new products, generate satisfactory clinical results, provide sufficient economic value, enhance existing products, or identify, acquire and integrate complementary businesses, technologies and products or if we experience a decrease in market size or market share or declines in average selling price or procedural volumes, or otherwise fail to compete effectively, we may not achieve our growth goals, which could have a material adverse effect on our business, financial condition and/or results of operations.

If we do not maintain our reputation with interventional physicians, interventional and surgical oncologists and critical care nurses our growth will be limited and our business could be harmed.

Physicians typically influence the medical device purchasing decisions of the hospitals and other healthcare institutions in which they practice. Consequently, our reputation with interventional physicians, interventional and surgical oncologists and critical care nurses is crucial to our continued growth. We believe that we have built a positive reputation based on the quality of our products, our physician-driven product development efforts, our marketing and training efforts and our presence at medical society meetings. Any actual or perceived diminution in the quality of our products, or our failure or inability to maintain these other efforts, could damage our reputation with interventional physicians and cause our growth to be limited and our business to be harmed, which could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

Our business and prospects depend heavily on the NanoKnife system, which is currently approved for the surgical ablation of soft tissue. If we are unable to secure expanded specific regulatory approvals for the NanoKnife system, our business and prospects may be materially harmed.

Our NanoKnife System is indicated for the surgical ablation of soft tissue. The long-term prospects for our NanoKnife business may rely on securing expanded indications for specific disease states and treatments. Based on our current indication, our ability to promote the NanoKnife system and provide training with respect to the use of the NanoKnife system is limited to the surgical ablation of soft tissue. In the fourth quarter of our 2019, we received approval from the FDA to initiate our DIRECT clinical trial to study the use of the NanoKnife system for the treatment of Stage III pancreatic cancer. If we are not able to successfully complete this trial and secure clearances or approvals for expanded indications for our NanoKnife system, including for the treatment of Stage III pancreatic cancer, or if expanded indications are significantly delayed or limited, our business and prospects may be materially harmed and we may need to delay our initiatives or even significantly curtail

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operations, which could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

Our business and prospects rely heavily upon our ability to successfully complete clinical trials, including, but not limited to, our NanoKnife DIRECT clinical study, our NanoKnife PRESERVE clinical study, our Auryon Pathfinder study and clinical studies for AngioVac. We may choose to, or may be required to, suspend, repeat or terminate our clinical trials if they are not conducted in accordance with regulatory requirements, the results are negative or inconclusive or the trials are not well designed.

Clinical trials must be conducted in accordance with the applicable laws and regulations in the jurisdictions in which the clinical trials are conducted, including FDA’s current Good Clinical Practices. The clinical trials are subject to oversight by the FDA, regulatory agencies in other jurisdictions, ethics committees and institutional review boards at the medical institutions where the clinical trials are conducted. Clinical trial protocols may require a large number of patients to be enrolled in the trials. Patient enrollment is a function of many factors, including the size of the patient population for the target indication, the proximity of patients to clinical sites, the eligibility criteria for the trial, the existence of competing clinical trials and the availability of alternative or new treatments. Clinical trials may be suspended by the FDA or by a regulatory agency in another jurisdiction at any time if the FDA or the regulatory agency finds deficiencies in the conduct of these trials or it is believed that these trials expose patients to unacceptable health risks.

We, the FDA or regulatory agencies in other jurisdictions might delay or terminate our clinical trials for various reasons, including insufficient patient enrollment, fatalities, unforeseen adverse side effects by enrolled patients or the development of new therapies that require us to revise or amend our clinical trial protocols. Patients may be discouraged from enrolling in our clinical trials if the trial protocol requires them to undergo extensive follow-up to assess safety and effectiveness, if they determine that the treatments received under the trial protocols are not attractive or involve unacceptable risks or discomforts or if they participate in contemporaneous clinical trials of competing products.

In addition, we rely on contract research organizations, or CROs, with respect to conducting our clinical trials. We may experience significant cost overruns associated with, and we may encounter difficulties managing, these CROs. Termination of our clinical trials or significant delays in completing our clinical trials could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

If we are unable to convince customers that our products can improve the cost structure of their business, our revenue growth and profitability may be materially and adversely impacted.

Worldwide initiatives to contain healthcare costs have led governments and the private sector to enact cost containment efforts as a means of managing the growth of health care utilization. Common techniques include policies on price regulation, competitive pricing, bidding and tender mechanics, coverage and payment, comparative effectiveness of therapies, technology assessments, and managed-care arrangements. These changes are causing the marketplace to put increased emphasis on the delivery of more cost-effective medical devices and therapies. Government programs, including Medicare and Medicaid, private health care insurance, and managed-care plans have attempted to control costs by limiting the amount of reimbursement they will pay for particular procedures or treatments, tying reimbursement to outcomes, shifting to population health management, and other mechanisms designed to constrain utilization and contain costs. Simultaneously, hospitals are redefining their role in health care delivery as many assume much more risk and control of the total cost of patient care. To successfully make this transformation, health systems are consolidating, purchasing or partnering with physicians and post-acute care providers, while also narrowing networks thus allowing greater control over outcomes. This has created an increasing level of price sensitivity among customers for our products and could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

We are dependent on single and limited source suppliers which subjects our business and results of operations to risks of supplier business interruptions.

We currently purchase significant amounts of several key products and product components from single and limited source suppliers and anticipate that we will do so for future products as well. Any delays in delivery of or shortages in those or other products and components could interrupt and delay manufacturing of our products and result in the cancellation of orders for our products. Any or all of these suppliers could discontinue the manufacture or supply of these products and components at any time. Due to FDA and other business considerations, we may not be able to identify and integrate alternative sources of supply in a timely fashion or at all. Any transition to alternate suppliers may result in production delays and increased costs and may limit our ability to deliver products to our customers. Furthermore, if we are unable to identify alternative sources of supply, we would have to modify our products to use substitute components, which may cause delays in shipments, backlogs, increased prices for our products or increased design and manufacturing costs.

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In addition, we purchase certain products as a distributor for the manufacturer of those products. Any constraint or interruption in the supply of finished products that we distribute could materially impact our ability to sell products, and have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

We are heavily dependent on third-party distributors to generate a substantial portion of our international revenues and are at the risk of these distributors also selling for our competitors, failing to be financially viable and failing to effectively distribute our products in compliance with applicable laws.

Outside of North America we rely heavily on third party distributors, either on a country-by-country basis or on a multi-country, regional basis, to market, sell and distribute our products where we do not have a direct sales and marketing presence (including, among others, China, Japan, Brazil, the Middle East and many European countries). As such, our revenue, if any, depends on the terms of such arrangements and the distributors’ efforts. These efforts may turn out not to be sufficient and our third-party distributors may not effectively sell our products. International distributors accounted for approximately 64% of international revenues for the fiscal year ended May 31, 2021. If we are unable to maintain our relationships or establish direct sales capabilities on acceptable terms or at all, we may lose significant revenue or be unable to achieve our growth aspirations. In certain circumstances, distributors may also sell competing products, or products for competing diagnostic modalities, and may have incentives to shift sales towards those competing products. As a result, we cannot assure you that our international distributors will increase or maintain our current levels of unit sales or increase or maintain our current unit pricing, which, in turn, could have a material adverse effect on our business, financial condition, results of operations and/or liquidity. In addition, there is a risk that our distributors will not be financially viable due to current economic and/or regulatory events in their respective countries or remit payments to us in a timely manner. If our distributors fail to comply with applicable laws or fail to effectively market and sell our products, our financial condition and results of operations could be materially and adversely impacted.

Failure to secure adequate reimbursement for our products could materially impair our ability to grow revenue and drive profitability.

Our products are used in medical procedures and purchased principally by hospitals or physicians which typically bill various third-party payors, such as governmental programs (e.g., Medicare, Medicaid and comparable foreign programs), private insurance plans and managed care plans, for the healthcare services provided to their patients. The ability of our customers to obtain appropriate reimbursement for products and services from third-party payors is critical to the success of medical device companies because it affects which products customers purchase and the prices they are willing to pay. In general, a third-party payor only covers a medical product or procedure when the plan administrator is satisfied that the product or procedure improves health outcomes, including quality of life or functional ability, in a safe and cost-effective manner. Even if a device has received clearance or approval for marketing by the FDA, there is no assurance that third-party payors, including Medicare and managed care companies, will cover the cost of the device and related procedures. Even if coverage is available, third-party payors may place restrictions on the circumstances where they provide coverage or may offer reimbursement that is not sufficient to cover the cost of our products.

Third-party payors who cover the cost of medical products or equipment, in addition to allowing a general charge for the procedure, often maintain lists of exclusive suppliers or approved lists of products deemed to be cost-effective. If our products are not on approved lists of third-party payors, healthcare providers must determine if the additional cost and effort required in obtaining prior authorization, and the uncertainty of actually obtaining coverage, is justified by any perceived clinical benefits from using our products.

Finally, the advent of contracted fixed rates per procedure has made it difficult to receive reimbursement for disposable products, even if the use of these products improves clinical outcomes. In addition, many third-party payors are moving to managed care systems in which providers contract to provide comprehensive healthcare for a fixed cost per person. Managed care providers often attempt to control the cost of healthcare by authorizing fewer elective surgical procedures. Under current prospective payment systems, such as the diagnosis related group system and the hospital out-patient prospective payment system, both of which are used by Medicare and in many managed care systems used by private third-party payors, the cost of our products will be incorporated into the overall cost of a procedure and not be separately reimbursed. If hospitals and physicians cannot obtain adequate reimbursement for our products or the procedures in which they are used, this could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

Reimbursement varies by country and can significantly impact the acceptance of new technology. Implementation of healthcare reforms in the United States and in other countries may limit, reduce or eliminate reimbursement for our products and adversely affect both our pricing flexibility and the demand for our products. Even when we develop a promising new product, we may find limited demand for the product unless reimbursement approval is obtained from private and governmental third-party payors. Changes in healthcare systems in the United States or elsewhere in a manner that significantly reduces

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reimbursement for procedures using our medical devices or denies coverage for these procedures, or adverse decisions relating to our products by administrators of these systems in coverage or reimbursement issues, would have an adverse impact on the acceptance of our products and the prices which our customers are willing to pay for them.

If a product liability claim is brought against us or our product liability insurance coverage is inadequate, our business could be harmed.

The design, manufacture and marketing of the types of medical devices we sell entail an inherent risk of product liability. Our products are used by physicians to treat seriously ill patients. We are periodically subject to product liability claims, and patients or customers may in the future bring claims against us in a number of circumstances and for a number of reasons, including if our products were misused, if a component of our product fails, if our manufacture or design was flawed, if the product produced unsatisfactory results or if the instructions for use and operating manuals and disclosure of product related risks for our products were found to be inadequate. In addition, individuals or groups seeking to represent a class may file suit against us. The outcome of litigation, particularly class action lawsuits, is difficult to assess or quantify. Plaintiffs in these types of lawsuits often seek recovery of very large or indeterminate amounts, including not only actual damages, but also punitive damages. The magnitude of the potential losses relating to these lawsuits may remain unknown for substantial periods of time.

We carry a product liability policy with a limit of $10.0 million per product liability claim and an aggregate policy limit of $10.0 million, subject to a self-insured retention of $0.5 million per occurrence and $2.0 million in the aggregate. We believe, based on claims made against us in the past, our existing product liability insurance coverage is reasonably adequate to protect us from any liabilities we might incur. However, there is no assurance that this coverage will be sufficient to satisfy any claim made against us. In addition, we may not be able to continue to maintain adequate coverage at a reasonable cost and on reasonable terms, if at all. Any product liability claim brought against us, with or without merit, could increase our product liability insurance rates or prevent us from securing any coverage in the future. Additionally, if one or more product liability claims is brought against us for uninsured liabilities or is in excess of our insurance coverage, our financial condition, results of operations and/or liquidity could be negatively impacted. Further, such claims may require us to recall some of our products, which could result in significant costs to us.

International and national economic and industry conditions constantly change, and could materially and adversely affect our business, financial condition and results of operations.

Our business, financial condition and results of operation are affected by many changing economic, industry and other conditions beyond our control. Actual or potential changes in international, national, regional and local economic, business and financial conditions, including recession, inflation and trade protection measures, creditworthiness of our customers, may negatively affect consumer preferences, perceptions, spending patterns or demographic trends, any of which could adversely affect our business, financial condition, results of operations and/or liquidity.

We are subject to macro-economic fluctuations in the U.S. and worldwide economy. Concerns about consumer and investor confidence, volatile corporate profits and reduced capital spending, international conflicts, terrorist and military activity, civil unrest and pandemic illness could reduce customer orders or cause customer order cancellations. In addition, political and social turmoil may put further pressure on economic conditions in the United States and abroad. The global economy has been periodically impacted by the effects of global economic downturns (such as recently related to COVID-19). There can be no assurance that there will not be further such events or deterioration in the global economy. These economic conditions make it more difficult for us to accurately forecast and plan our future business activities.

Sales outside the U.S. accounted for approximately 19% of our net sales during our fiscal year ended May 31, 2021. We anticipate that sales from international operations will continue to represent a significant portion of our total sales, and we intend to continue our expansion into emerging and/or faster-growing markets outside the U.S. Our sales and profitability from our international operations are subject to risks and uncertainties that could have a material adverse effect on our business, financial condition and/or results of operations, many of which we cannot predict, including:

•fluctuations in currency exchange rates which may, in some instances affect spending behavior and reduce cash flows and revenue outside the U.S.;

•healthcare reform legislation;

•multiple non-U.S. regulatory requirements that are subject to change and could restrict our ability to manufacture and sell our products;

•local product preferences and product requirements;

•longer-term receivables than are typical in the U.S. and/or the ability to obtain payment;

•trade protection measures and import or export licensing requirements;

•less intellectual property protection in some countries outside the U.S. than exists in the U.S.;

•different labor regulations and workforce instability;

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•the potential payment of U.S. income taxes on earnings of certain foreign subsidiaries subject to U.S. taxation upon repatriation;

•the expiration and non-renewal of foreign tax rulings;

•potential negative consequences from changes in or interpretation of tax laws, including changes in our effective tax rate or the applicable tax rate in one or more jurisdictions; and

•economic instability and inflation, recession or interest rate fluctuations.

In addition, the United Kingdom’s (“UK”) departure from the European Union (“EU”) (commonly known as “Brexit”) has created uncertainties affecting business operations in the UK, the EU and a number of other countries, including with respect to compliance with the regulatory regimes regarding the labeling and registration of the products we sell in these markets. While we have taken proactive steps to mitigate possible disruption to our operations, we could face increased costs, volatility in exchange rates, market instability and other risks, depending on the effects of existing and future agreements between the UK and EU regarding Brexit and the future EU/UK trading relationship.

Our business could be harmed if we cannot hire or retain qualified personnel.

Our business depends upon our ability to attract and retain highly qualified personnel, including managerial, sales and technical personnel. We compete for key personnel with other companies, healthcare institutions, academic institutions, government entities and other organizations. We do not have written employment agreements with our executive officers, other than the CEO. Our ability to maintain and expand our business may be impaired if we are unable to retain our current key personnel or hire or retain other qualified personnel in the future, including personnel for our manufacturing facilities. If we are not able to hire and retain personnel in our manufacturing facilities, we may not meet our production demand. In addition, our sales force is highly talented and there is competition in the sales industry which could have an adverse effect on our business if there is significant turnover.

If we are unable to manage our growth profitably, our business, financial results and stock price could suffer.

Our future financial results will depend in part on our ability to profitably manage our growth. Management will need to maintain existing customers and attract new customers, recruit, retain and effectively manage employees, as well as expand operations and integrate customer support and financial control systems. If integration-related expenses and capital expenditure requirements are greater than anticipated or if we are unable to manage our growth profitably, our financial results and the market price of our common stock may decline.

In recent years we have begun to implement operational excellence initiatives which include a number of restructuring, realignment and cost reduction initiatives. We may not realize the benefits of these initiatives to the extent or on the timing we anticipated and the ongoing difficulties in implementing these measures may be greater than anticipated, which could cause us to incur additional costs or result in business disruptions. In addition, if these measures are not successful or sustainable, we may undertake additional realignment and cost reduction efforts, which could result in significant additional charges and adversely impact our ability to achieve our other strategic goals and business plans.

We may fail to attract additional capital necessary to expand our business or may incur additional indebtedness which, together with our current indebtedness levels, could impose operating and financial restrictions on us as a result of debt service obligations which could significantly limit our ability to execute our business strategy or curtail our growth.

We may require additional capital to expand our business. If cash generated internally is insufficient to fund capital requirements, we may require additional debt or equity financing. In addition, we may require financing to fund any significant acquisitions we may seek to make. Disruptions in the capital markets have previously resulted, and could again result, in volatility, decreased liquidity, and widening of credit spreads, which could make needed financing either unavailable or available on terms unsatisfactory to us which could result in significant stockholder dilution.

We may incur additional indebtedness or draw additional amounts on our existing credit facilities in the future subject to limitations contained in the agreements governing our debt. The interest rate on potential borrowings could be a floating rate which could expose us to the risk of increased interest expense in the future. The terms of indebtedness could require us to comply with certain financial maintenance covenants. In addition, the terms of our existing indebtedness include, and any future indebtedness could include, covenants restricting or limiting our ability to take certain actions. These covenants could adversely affect our ability to obtain additional financing, to finance future operations, to pursue certain business opportunities or take certain corporate actions. The covenants could also restrict our flexibility in planning for changes in our business and the industry and could make us more vulnerable to economic downturns and adverse developments, could limit our flexibility in planning for, or reacting to, changes and opportunities in the markets in which we compete, could place us at a competitive disadvantage compared to our competitors that have less debt or could require us to dedicate a substantial portion of our cash flow to service our debt.

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Our ability to meet our cash requirements, including our debt service obligations, could be dependent upon our operating performance, which would be subject to general economic and competitive conditions and to financial, business and other factors affecting our operations, many of which could be beyond our control. We cannot provide assurance that our business operations would generate sufficient cash flows from operations to fund potential cash requirements and debt service obligations. If our operating results, cash flow or capital resources prove inadequate, we could face substantial liquidity problems and might be required to dispose of material assets or operations to meet our debt and other obligations. If we incurred indebtedness and were unable to service our debt, we could be forced to reduce or delay planned expansions and capital expenditures, sell assets, restructure or refinance our debt or seek additional equity capital, and we could be unable to take any of these actions on satisfactory terms or in a timely manner. Further, any of these actions may not be sufficient to allow us to service our potential debt obligations or could have an adverse impact on our business. Our potential debt agreements could limit our ability to take certain of these actions. Our failure to generate sufficient operating cash flow to pay our potential debts or to successfully undertake any of these actions could have a material adverse effect on us.

Our goodwill, intangible assets and fixed assets are subject to potential impairment; we have recorded significant goodwill impairment charges and may be required to record additional charges to future earnings if our goodwill or intangible assets become impaired.

A significant portion of our assets consists of goodwill, intangible assets and fixed assets, the carrying value of which may be reduced if we determine that those assets are impaired, including intangible assets from recent acquisitions. During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The impairment charge is recorded in "Acquisition, restructuring and other items, net", on the Consolidated Statement of Operations (see Note 19).

Most of our intangible and fixed assets have finite useful lives and are amortized or depreciated over their useful lives on either a straight-line basis or over the expected period of benefit or as revenues are earned from the sales of the related products. The underlying assumptions regarding the estimated useful lives of these intangible assets are reviewed quarterly and more often if an event or circumstance occurs making it likely that the carrying value of the assets may not be recoverable and are adjusted through accelerated amortization if necessary. Whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable we test intangible assets for impairment based on estimates of future cash flows. Factors that may be considered a change in circumstances indicating that the carrying value of our intangible assets and/or goodwill may not be recoverable include a decline in stock price and market capitalization, slower growth rates in our industry or our own operations and/or other materially adverse events that have implications on the profitability of our business. When testing for impairment of definite-lived intangible assets held for use, the Company groups assets at the lowest level for which cash flows are separately identifiable. The Company operates as a single asset group. If an intangible asset is considered to be impaired, the amount of the impairment will equal the excess of the carrying value over the fair value of the asset.

Goodwill is required to be tested for impairment at least annually. We review our single reporting unit for potential goodwill impairment in the third fiscal quarter of each year as part of our annual goodwill impairment testing, and more often if an event or circumstance occurs making it likely that impairment exists. The annual goodwill impairment review performed in December 2020 indicated no goodwill impairments. In fiscal year 2020, we recorded a goodwill impairment loss of $158.6 million. If actual results differ from the assumptions and estimates used in the goodwill and intangible asset calculations, we could incur future impairment or amortization charges, which could negatively impact our financial condition and results of operations.

We may be limited in our ability to utilize, or may not be able to utilize, net operating loss carryforwards to reduce our future tax liability.

IRC Section 382 and related provisions contain rules that limit for U.S. federal income tax purposes the ability of a Company that undergoes an “ownership change” to utilize its net operating loss carryforwards and certain other tax attributes existing as of the date of such ownership change. Our Federal net operating loss carryforwards as of May 31, 2021 after considering IRC Section 382 limitations are $134.6 million. The expiration of the Federal net operating loss carryforwards is as follows: $8.6 million between 2022 and 2023, $79.4 million between 2028 and 2037 and $46.6 million indefinitely. Our state net operating loss carryforwards as of May 31, 2021 after considering remaining IRC Section 382 limitations are $20.0 million which expire in various years from 2029 to 2041. Future ownership changes within the meaning of IRC Section 382 may also subject our tax loss carryforwards to annual limitations which would restrict our ability to use them to offset our taxable income in periods following the ownership changes. See Note 10 to our consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended May 31, 2021 for a further discussion of our tax loss carryovers.

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A cyber-attack or other breach of our information technology systems could have a material adverse effect on our business, financial condition and/or results of operations.

We rely on information technology systems to process, transmit, and store electronic information in our day-to-day operations. Similar to other large multi-national companies, the size and complexity of our information technology systems makes them vulnerable to cyber-attacks, malicious intrusions, breakdowns, destructions, losses of data privacy, or other significant disruptions. Our information systems require an ongoing commitment of resources to maintain, protect, and enhance existing systems and develop new systems to keep pace with continuing changes in information processing technology, evolving systems and regulatory standards, the increasing need to protect patient and customer information, and changing customer patterns. In addition, third parties may attempt to hack into our products to obtain data relating to patients with our products or our proprietary information.

Any failure by us to maintain or protect our information technology systems and data integrity, including from cyber-attacks, ransomware, intrusions or other breaches, could result in the unauthorized access to patient data and personally identifiable information, theft of intellectual property, misappropriation of assets, or otherwise compromise our confidential or proprietary information and disrupt our operations. Any of these events, in turn, may cause us to lose existing customers, have difficulty preventing, detecting, and controlling fraud, have disputes with customers, physicians, and other health care professionals, be subject to legal claims and liability, have regulatory sanctions or penalties imposed, have increases in operating expenses, incur expenses or lose revenues as a result of a data privacy breach or theft of intellectual property, or suffer other adverse consequences, any of which could have a material adverse effect on our business, financial condition and/or results of operations.

Any disaster at our manufacturing facilities or those of our suppliers could disrupt our ability to manufacture our products for a substantial amount of time.

We conduct our manufacturing and assembly at facilities in Queensbury, New York and Glens Falls, New York. It would be difficult, expensive and time-consuming to transfer resources from one facility to the other and/or replace or repair these facilities or manufacturing equipment if they were significantly affected by a disaster. Additionally, we might be forced to rely on third-party manufacturers or delay production of our products. Insurance for damage to our properties and the disruption of our business from disasters may not be sufficient to cover all of our potential losses and may not continue to be available to us on acceptable terms, or at all. If one of our principal suppliers were to experience a similar disaster, uninsured loss or under-insured loss, we might not be able to obtain adequate alternative sources of supplies or products. Any significant uninsured loss, prolonged or repeated disruption, or inability to operate experienced by us or any of our principal suppliers could cause significant harm to our business, financial condition, results of operations and/or liquidity.

Anti-takeover provisions in our organizational documents and Delaware law may discourage or prevent a change of control, even if an acquisition would be beneficial to our stockholders, which could cause our stock price to decline and prevent attempts by our stockholders to replace or remove our current management.

Our amended and restated certificate of incorporation and our amended and restated bylaws contain provisions that may enable our management to resist a change in control. For example, our Board of Directors is classified so that not all members of our Board of Directors are elected at one time and our Board of Directors is authorized, without prior stockholder approval, to create and issue “blank check” preferred stock with rights senior to those of our common stock and stockholder action by written consent is prohibited. We are also subject to the provisions of Section 203 of the Delaware General Corporation Law, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These provisions may discourage, delay or prevent a change in the ownership of our Company or a change in our management. In addition, these provisions could limit the price that investors would be willing to pay in the future for shares of our common stock. Any delay or prevention of a change of control transaction or changes in our Board of Directors could cause the market price of our common stock to decline.

The COVID-19 pandemic has negatively impacted our business and operations around the world and may continue to materially and adversely impact our business, operations and financial results.

The COVID-19 pandemic has created significant disruption and uncertainty in the global economy, has negatively impacted our business, results of operations and financial condition, and we anticipate that it may continue to negatively impact our business, results of operations and financial condition for the foreseeable future.

Numerous national, international, state and local jurisdictions have imposed, and others in the future may impose, a variety of government orders and restrictions for their residents to control the spread of COVID-19. Such orders or restrictions may cause significant alteration of our operations, work stoppages, slowdowns and delays, travel restrictions and event cancellations, among other effects, thereby significantly and negatively impacting our operations. Other disruptions or potential

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disruptions include (i) restrictions on our personnel and personnel of business partners to travel and access customers for training and case support; (ii) reductions in spending by our customers; (iii) delays in approvals by regulatory bodies; (iv) diversion of or limitations on employee resources that would otherwise be focused on the operations of our business, including because of sickness of employees or their families or the desire of employees to avoid contact with large groups of people; (v) reductions in our sales team, including through layoffs, furloughs or other losses of sales representatives; (vi) additional government requirements or other incremental mitigation efforts that may further impact our or our suppliers’ capacity to manufacture our products; (vii) disruption of our research and development activities; and (viii) delays in ongoing studies and pre-clinical trials.

In addition, elective procedures that use our products significantly decreased in number during fiscal year 2021, as health care organizations around the world prioritized the treatment of patients with COVID-19 and reduced spending in other areas. For example, in the United States, governmental authorities have recommended, and in certain cases required, that elective, deferrable, specialty and other procedures and appointments, be suspended or canceled to avoid non-essential patient exposure to medical environments and potential infection with COVID-19 and to focus limited resources and personnel capacity toward the treatment of COVID-19 patients. Many of these procedures that use our products have been suspended or postponed. While certain of these procedures have resumed in certain locations, it is unclear when or if all procedures in all locations will resume. Similarly, our clinical trials may be materially impacted by the coronavirus as hospitals prioritize treating coronavirus patients.

In addition, most of the hospitals and clinics that purchase our products have instituted strict procedures at their facilities in an effort to prevent the spread of COVID-19, including restrictions on sales representatives entering these facilities. This has been, and currently remains, a major impediment to our sales efforts, as supporting existing customers and acquiring new customers is much more difficult in this environment. These restrictions have had an effect on our sales and, until they are lifted, our business, operations and financial results will continue to be adversely impacted.

These challenges and restrictions will likely continue for the duration of the pandemic, which is uncertain, and may even continue beyond the pandemic. Many areas are relaxing restrictions and resuming business operations, but a resurgence in infections or mutations of the coronavirus that causes COVID-19 could cause authorities to reinstate such restrictions or impose additional restrictions. All of these factors also may cause or contribute to disruptions and delays in our logistics and supply chain. The extent to which the COVID-19 pandemic impacts our business, operations and financial results will depend on future developments that are uncertain and cannot be predicted, including new information that may emerge concerning the severity and spread of the virus and the actions by government entities, our customers and other parties to contain the virus or treat its impact, among others. To the extent the COVID-19 pandemic adversely affects our business, operations and financial results, it may also have the effect of heightening other risks described herein, such as those relating to general economic conditions, demand for our products, relationships with suppliers and sales efforts.

RISKS RELATED TO THE REGULATORY ENVIRONMENT

We are subject to a comprehensive system of federal, state and international laws and regulations, and we could be the subject of investigations, enforcement actions or face lawsuits and monetary or equitable judgments.

We operate in many parts of the world, and our operations are affected by complex state, federal and international laws relating to healthcare, environmental protection, antitrust, anti-corruption, anti-bribery, fraud and abuse, export control, tax, employment and laws regarding privacy, personally identifiable information and protected health information, including, for example, the Food, Drug and Cosmetic Act (“FDCA”), various FDA and international regulations relating to, among other things, the development, quality assurance, manufacturing, importation, distribution, marketing and sale of, and billing for, our products, the federal Anti-Kickback Statute and Federal False Claims Act (Note 17), the U.S. Foreign Corrupt Practices Act (“FCPA”) and similar anti-bribery laws in international jurisdictions, including the UK Anti-Bribery Act, the federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), General Data Protection Regulation (“GDPR”), domestic and foreign data protection, data security and privacy laws, laws related to the collection, storage, use and disclosure of personal data and laws and regulations relating to sanctions and money laundering. The failure to comply with these laws and regulatory standards, allegations of such non-compliance or the discovery of previously unknown problems with a product or manufacturer: (i) could result in FDA Form-483 notices and/or warning letters or the foreign equivalent, fines, delays or suspensions of regulatory clearances, investigations, detainment, seizures or recalls of products (with the attendant expenses), the banning of a particular device, an order to replace or refund the cost of any device previously manufactured or distributed, operating restrictions and/or civil or criminal prosecution, and/or penalties, as well as decreased sales as a result of negative publicity and product liability claims; (ii) could expose us to breach of contract claims, fines and penalties, costs for remediation and harm to our reputation; (iii) could result in criminal or civil sanctions, including substantial fines, imprisonment and exclusion from participation in healthcare programs such as Medicare and Medicaid and health programs outside the United States; and (iv) could otherwise disrupt our business and could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

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The healthcare industry is under continued scrutiny from state, federal and international governments, including with respect to industry practices in the area of sales and marketing. Certain states, including Massachusetts, have recently passed or are considering legislation restricting our interactions with health care providers and requiring disclosure of many payments to them. The federal government has recently introduced similar legislation, which may or may not preempt state laws. If our marketing, sales or other activities fail to comply with the FDA’s or other comparable foreign regulatory agencies’ regulations or guidelines, or other applicable laws, we may be subject to warnings from the FDA or investigations or enforcement actions from the FDA, Medicare, the Office of Inspector General of the U.S. Department of Health and Human Services or other government agencies or enforcement bodies. We anticipate that the government will continue to scrutinize our industry closely, and that additional regulation by governmental authorities may increase compliance costs, increase exposure to litigation and may have other adverse effects to our operations. The Company’s failure to comply with any marketing or sales regulations or any other applicable regulatory requirements could adversely affect our business, results of operations, financial condition and/or liquidity.

In addition, lawsuits by or otherwise involving employees, customers, licensors, licensees, suppliers, vendors, business partners, distributors, shareholders or competitors with respect to how we conduct our business could be very costly and could substantially disrupt our business. The occurrence of an adverse monetary or equitable judgment or a large expenditure in connection with a settlement of any of these matters could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

If we or some of our suppliers fail to comply with the FDA’s Quality System Regulation, or QSR, and other applicable post-market requirements, our manufacturing operations could be disrupted, our product sales and profitability could suffer, and we may be subject to a wide variety of FDA enforcement actions.

Our manufacturing processes and those of some of our suppliers must comply with the FDA’s Quality System Regulation, or QSR, which governs the methods used in, and the facilities and controls used for, the design, testing, manufacture, control, quality assurance, installation, servicing, labeling, packaging, storage and shipping of medical devices, and with current medical device adverse event reporting regulations, and similar foreign rules and regulations. The FDA enforces the QSR through unannounced inspections. Despite our training and compliance programs, our internal control policies and procedures may not always protect us from negligent, reckless or criminal acts committed by our employees or agents. If we, or one of our suppliers, fail a QSR inspection, or if a corrective action plan adopted by us or one of our suppliers is not sufficient, the FDA may bring an enforcement action, and our operations could be disrupted and our manufacturing delayed. We are also subject to the FDA’s general prohibition against promoting our products for unapproved or “off-label” uses, the FDA’s adverse event reporting requirements and the FDA’s reporting requirements for field correction or product removals. The FDA has recently placed increased emphasis on its scrutiny of compliance with the QSR and these other post-market requirements. In addition, most other countries require us and our suppliers to comply with manufacturing and quality assurance standards for medical devices that are similar to those in force in the United States before marketing and selling our products in those countries. If we, or our suppliers, should fail to do so, we would lose our ability to market and sell our products in those countries.

If we cannot obtain and maintain marketing clearance or approval from governmental agencies, we will not be able to sell our products.

Our products are medical devices that are subject to extensive regulation in the United States and in the foreign countries in which they are sold. Unless an exemption applies, each medical device that we wish to market in the United States must receive either 510(k) clearance or Pre-Market Approval (“PMA”) from the FDA before the product can be sold. Either process can be lengthy and expensive. The FDA’s 510(k) clearance procedure, also known as “premarket notification,” is the process we have used for our current products. This process usually takes from four to twelve months from the date the premarket notification is submitted to the FDA, but may take significantly longer. Even after a device receives regulatory approval it remains subject to significant regulatory and quality requirements, such as manufacturing, recordkeeping, renewal, recertification or reporting and other post market approval requirements, which may include clinical, laboratory or other studies.

Product approvals by the FDA and other foreign regulators can be withdrawn due to failure to comply with regulatory standards or the occurrence of unforeseen problems following initial approval or may be re-classified to a higher regulatory classification, such as requiring a PMA for a previously cleared 510(k) device. The PMA process is much more costly, lengthy and uncertain. It generally takes from one to three years from the date the application is submitted to, and filed with the FDA, and may take even longer. In addition, any modification to an FDA-cleared medical device that could significantly affect its safety or effectiveness, or that would constitute a major change or modification in its intended use, requires a new FDA 510(k) clearance or, possibly, a PMA.

Regulatory regimes in other countries similarly require approval or clearance prior to our marketing or selling products in those countries. We rely on our distributors to obtain regulatory clearances or approvals of our products outside of the United

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States. If we are unable to obtain additional clearances or approvals needed to market existing or new products in the United States or elsewhere or obtain these clearances or approvals in a timely fashion or at all, or if our existing clearances are revoked, our revenues and profitability may decline.

Our products may be subject to product recalls, which may harm our reputation and divert managerial and financial resources.

The FDA and similar governmental authorities in other countries have the authority to order mandatory recall of our products or order their removal from the market if there are material deficiencies or defects in design, manufacture, installation, servicing or labeling of the device, or if the governmental entity finds that our products would cause serious adverse health consequences. A government mandated voluntary recall or field action by us could occur as a result of component failures, manufacturing errors or design defects, including labeling defects. Any recall of our products may harm our reputation with customers and divert managerial, engineering and financial resources. There is no assurance that we will not incur warranty or repair costs, be subject to liability claims for damages related to product defects, or experience manufacturing, shipping or other delays or interruptions as a result of these defects in the future. Our insurance policies may not provide sufficient protection should a claim be asserted. A recall of any of our products could harm our reputation, divert managerial and financial resources and have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

We may be subject to fines, penalties, injunctions or costly investigations if we are determined to be promoting the use of our products for unapproved or “off-label” uses.

If we are incorrect in our belief that our promotional materials and training methods regarding physicians are conducted in compliance with regulations of the FDA and other applicable regulations, and the FDA determines that our promotional materials or training constitutes promotion of an unapproved use, the FDA could request that we modify our training or promotional materials or subject us to regulatory enforcement actions, including the issuance of a warning letter, injunction, seizure, civil fine and criminal penalties. It is also possible that other federal, state or foreign enforcement authorities might take action if they consider promotional or training materials to constitute promotion of an unapproved use, which could result in significant fines or penalties under other statutory authorities, such as laws prohibiting false claims for reimbursement. Any of these results could have a material adverse effect on our business, financial condition, results of operations and/or liquidity.

Laws and regulations governing the export of our products could adversely impact our business. If the U.S. government imposes strict sanctions on Iran, our revenue could be impacted.

The U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC), and the Bureau of Industry and Security at the U.S. Department of Commerce (BIS), administer certain laws and regulations that restrict U.S. persons and, in some instances, non-U.S. persons, in conducting activities, transacting business with or making investments in certain countries, governments, entities and individuals subject to U.S. economic sanctions. Due to our international operations, we are subject to such laws and regulations, which are complex, restrict our business dealings with certain countries and individuals, and are constantly changing. Further restrictions may be enacted, amended, enforced or interpreted in a manner that materially impacts our operations.

In fiscal year 2021 we generated $1.5 million of revenue for sales to distributors doing business in Iran. We continuously review our ability to sell products to distributors that conduct business in Iran in accordance with all applicable U.S. laws. If laws, rules or regulations of the United States with respect to doing business in, or with parties that do business in, Iran change to restrict our ability to generate revenue in Iran, our revenue could decline, impacting our results of operations.

From time to time, we have limited business dealings in countries subject to comprehensive sanctions. These business dealings may expose us to a heightened risk of violating applicable sanctions regulations. Violations of these regulations are punishable by civil penalties, including fines, denial of export privileges, injunctions, asset seizures, debarment from government contracts, revocations or restrictions of licenses, and/or criminal fines and imprisonment. We have established policies and procedures designed to assist with our compliance with such laws and regulations. However, there can be no assurance that our policies and procedures will effectively prevent us from violating these regulations in every transaction in which we may engage, and such a violation could adversely affect our reputation, business, financial condition, results of operations and cash flows.

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RISKS RELATED TO INTELLECTUAL PROPERTY

If we fail to adequately protect our intellectual property rights, we may not be able to generate revenues from new or existing products and our business may suffer.

Our success depends in part on obtaining, maintaining and enforcing our patents, trademarks and other proprietary rights, and our ability to avoid infringing the proprietary rights of others. We rely upon patent, trade secret, copyright, know-how and trademark laws, as well as license agreements and contractual provisions, to establish our intellectual property rights and protect our products. However, no assurances can be made that any pending or future patent applications will result in the issuance of patents, that any current or future patents issued to, or licensed by, us will not be challenged or circumvented by our competitors, or that our patents will not be found invalid.

Patent positions of medical device companies, including our Company, are uncertain and involve complex and evolving legal and factual questions. The coverage sought in a patent application can be denied or significantly reduced either before or after the patent is issued. Consequently, there can be no assurance that any of our pending patent applications will result in an issued patent. There is also no assurance that any existing or future patent will provide significant protection or commercial advantage, or whether any existing or future patent will be circumvented by a more basic patent, thus requiring us to obtain a license to produce and sell the product.

Additionally, we rely on trade secret protection for certain unpatented aspects of our proprietary technology. There can be no assurance that others will not independently develop or otherwise acquire substantially equivalent proprietary information or techniques, that others will not gain access to our proprietary technology or disclose such technology, or that we can meaningfully protect our trade secrets. We have a policy of requiring key employees and consultants to execute confidentiality agreements upon the commencement of an employment or consulting relationship with us. Our confidentiality agreements also require our employees to assign to us all rights to any inventions made or conceived during their employment with us. We also generally require our consultants to assign to us any inventions made during the course of their engagement by us. There can be no assurance, however, that these agreements will provide meaningful protection or adequate remedies for us in the event of unauthorized use, transfer or disclosure of confidential information or inventions. If we are not able to adequately protect our intellectual property, our market share, financial condition and results of operations may suffer.

If third parties claim that our products infringe their intellectual property rights, we may be forced to expend significant financial resources and management time defending against such actions and our financial condition and our results of operations could suffer.

Third parties may claim that our products infringe their patents and other intellectual property rights. Identifying third-party patent rights can be particularly difficult because, in general, patent applications can be maintained in secrecy for at least 18 months after their earliest priority date, and publication of discoveries in the scientific or patent literature often lag behind actual discoveries. Some companies in the medical device industry have used intellectual property infringement litigation to gain a competitive advantage. If a competitor were to challenge our patents, licenses or other intellectual property rights, or assert that our products infringe its patent or other intellectual property rights, we could incur substantial litigation costs, be forced to make expensive changes to our product design, pay royalties or other fees to license rights in order to continue manufacturing and selling our products, or pay substantial damages. Third-party infringement claims, regardless of their outcome, would not only consume our financial resources but also divert our management’s time and effort. Such claims could also cause our customers or potential customers to purchase competitors’ products or defer or limit their purchase or use of our affected products until resolution of the claim. See Part I, Item 3 "Legal Proceedings" of this report for additional details on litigation regarding proprietary technology.

RISKS RELATED TO OUR STOCK PRICE

Our future operating results are difficult to predict and may vary significantly from quarter to quarter, which may adversely affect the price of our common stock.

The ongoing introduction of new products and services that affect our overall product mix make the prediction of future operating results difficult. You should not rely on our past results as any indication of future operating results. The price of our common stock will likely fall in the event that our operating results do not meet the expectations of analysts and investors. Comparisons of our quarterly operating results are an unreliable indication of our future performance because they are likely to vary significantly based on many factors, including:

•the level of sales of our products and services in our markets;

•our ability to introduce new products or services and enhancements in a timely manner;

•the demand for and acceptance of our products and services;

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•the success of our competition and the introduction of alternative products or services;

•our ability to command favorable pricing for our products and services;

•the growth of the market for our devices and services;

•the expansion and rate of success of our direct sales force in the United States and internationally and our independent distributors internationally;

•actions relating to ongoing FDA compliance;

•our ability to integrate acquired assets or companies;

•the effect of intellectual property disputes;

•the size and timing of orders from independent distributors or customers;

•the attraction and retention of key personnel, particularly in sales and marketing, regulatory, manufacturing and research and development;

•unanticipated delays or an inability to control costs;

•general economic conditions as well as those specific to our customers and markets; and

•seasonal fluctuations in revenue due to the elective nature of some procedures.

Our stock price may be volatile, which may cause the value of our stock to decline or subject us to a securities class action litigation.

The trading price of our common stock price may be volatile and could be subject to wide fluctuations in price in response to various factors, many of which are beyond our control, attributable to outside factors and/or unrelated to operating performance. Such factors may include comments by securities analysts or other third parties, including blogs, articles, message boards and social and other media coverage which may not be attributable to us and may not be reliable or accurate.

The NASDAQ Stock Market and medical devices companies in particular have experienced substantial price and volume volatility that is often seemingly unrelated to the operating performance of the companies. These broad market fluctuations may cause the trading price of our common stock to decline. In the past, securities class action litigation has often been brought against a company after a period of volatility in the market price of its common stock.

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Item 1B. Unresolved Staff Comments.

None. 

Item 2. Properties.

During the year ended May 31, 2021, we operated in the following locations:

Location	Purpose	Approx. Sq. Ft.	Property Type
Latham, NY	Corporate headquarters	39,000	Leased
Glens Falls, NY	Manufacturing	41,000	Owned
Queensbury, NY	Manufacturing and distribution	194,000	Owned
Marlborough, MA	Research and development	31,000	Leased
Amsterdam, NL	Selling, marketing and administrative	8,100	Leased
Rehovot, IL	Research and development	4,300	Leased

In addition, we lease sales offices in various other jurisdictions.

Item 3. Legal Proceedings.

Information regarding legal proceedings is included in Note 17 to our consolidated financial statements in this Annual Report on Form 10-K.

Item 4. Mine Safety Disclosures.

Not applicable.

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Part II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities.

Our common stock is traded on the Global Select Market tier of the NASDAQ Stock Market LLC, under the symbol “ANGO.”

The following table sets forth, for the fiscal quarters indicated, the high and low sale prices for our common stock as reported by the NASDAQ Stock Market.

	Sale Price
	High		Low
Year ended May 31, 2021
Fourth Quarter	$	25.12	$	20.61
Third Quarter	$	21.58	$	13.77
Second Quarter	$	14.38	$	9.10
First Quarter	$	12.01	$	8.26
	Sale Price
	High		Low
Year ended May 31, 2020
Fourth Quarter	$	11.75	$	8.33
Third Quarter	$	16.90	$	11.40
Second Quarter	$	19.26	$	14.23
First Quarter	$	21.89	$	18.27

As of July 26, 2021, there were 170 holders of record of our common stock.

Dividends

We did not declare any cash dividends on our common stock during our last three fiscal years. We do not anticipate paying any cash dividends on our common stock for the foreseeable future.

Performance Graph

The graph below matches AngioDynamics, Inc.’s cumulative 5-year total shareholder return on common stock with the cumulative total returns of the NASDAQ Composite index, the RDG SmallCap Medical Devices index, and the NASDAQ Medical Equipment index. The graph tracks the performance of a $100 investment in our common stock and in each index (with the reinvestment of all dividends) from May 31, 2016 to May 31, 2021. The stock price performance included in this graph is not necessarily indicative of future stock price performance.

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Item 6. Selected Financial Data.

Information required by this Item 6 is not included as we are electing to exclude this information pursuant to Regulation S-K Item 301, as amended.

For financial data and discussion of our results of operations and financial position, refer to Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Part II, Item 8 “Financial Statements and Supplementary Data” contained in this Annual Report on Form 10-K.

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Item 7. Management’s Discussion and Analysis of Financial Conditions and Results of Operations.

The following information should be read together with the audited consolidated financial statements and the notes thereto and other information included elsewhere in this annual report on Form 10-K. This discussion may contain forward-looking statements related to future events and our future financial performance that are based on current expectation and are subject to risks and uncertainties. Our actual results may differ materially from those anticipated in any forward-looking statements as a result of many factors, including those set forth in Part I, Item 1A, "Risk Factors" and "Disclosure Regarding Forward-Looking Statements" included in this Annual Report on Form 10-K.

For all periods presented in Management's Discussion and Analysis of Financial Conditions and Results of Operations, all sales, cost of sales, expenses, gains and income taxes are exclusive of Fluid Management.

EXECUTIVE OVERVIEW

Company and Market

We design, manufacture and sell a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and for use in oncology and surgical settings. Our devices are generally used in minimally invasive, image-guided procedures. Many of our products are intended to be used once and then discarded, or they may be temporarily implanted for short- or longer-term use.

Our business operations cross a variety of markets. Our financial performance is impacted by changing market dynamics, which have included an emergence of value-based purchasing by healthcare providers, consolidation of healthcare providers, the increased role of the consumer in health care decision-making and an aging population, among others. In addition, our growth is impacted by changes within our sector, such as the merging of competitors to gain scale and influence; changes in the regulatory environment for medical device; and fluctuations in the global economy.

Our sales and profitability growth also depends, in part, on the introduction of new and innovative products, together with ongoing enhancements to our existing products. Expansions of our product offerings are created through internal and external product development, technology licensing and strategic alliances. We recognize the importance of, and intend to continue to make investments in research and development activities and selective business development opportunities to provide growth opportunities.

We sell our products in the United States primarily through a direct sales force, and outside the U.S. through a combination of direct sales and distributor relationships. Our end users include interventional radiologists, interventional cardiologists, vascular surgeons, urologists, interventional and surgical oncologists and critical care nurses. We expect our businesses to grow in both sales and profitability by expanding geographically, penetrating new markets, introducing new products and increasing our presence internationally.

The COVID-19 global pandemic has impacted our business and may pose future risks. Even with the public health actions that have been taken to reduce the spread of the virus, there may continue to be disruptions with respect to consumer demand, hospital operating procedures and workflow, our ability to continue to manufacture products, the reliability of our supply chain and inflation. Accordingly, management continues to evaluate the Company’s liquidity position, communicate with and monitor the actions of our customers and suppliers, and review our near-term financial performance.

In the third quarter of fiscal year 2021, a benefit of $1.9 million was recorded as a result of the employee retention credit that the Company filed for under the provisions of the Coronavirus Aid, Relief and Economic Security Act (the "CARES Act").

In evaluating the operating performance of our business, management focuses on revenue, gross margin, operating income, earnings per share and cash flow from operations. A summary of these key financial metrics for the year ended May 31, 2021 compared to the year ended May 31, 2020 follows:

Year ended May 31, 2021:

•Revenue increased by 10.2% to $291.0 million

•Gross margin as a percentage of sales decreased by 300 bps to 53.9%

•Operating loss decreased by $131.8 million to $35.3 million

•Cash flow from operations increased by $38.6 million to cash provided by operations of $24.1 million

The ongoing recovery from the COVID-19 pandemic has had a varying impact on each of our three businesses. Our Endovascular Therapies and Vascular Access businesses performed the strongest of the businesses during the year. The

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number of procedures continued to improve from the COVID-19 lows in the second half of last fiscal year. Our Oncology business continued to face pressure from reductions in procedure volumes due to challenges resulting from the COVID-19 pandemic and the resulting challenging capital spending environment. During fiscal year 2021, we focused on the following areas in responding to the COVID-19 pandemic:

•Supporting and progressing our key growth initiatives (the AngioVac, Auryon and NanoKnife systems);

•Managing operating expenses; and

•Managing our cash and balance sheet.

Strategic Initiatives to Drive Growth

As the Company has previously announced, the Company is focused on its ongoing transformation from a company with a broad portfolio of largely undifferentiated products to a more focused medical technology company that delivers unique and innovative health care solutions. The Company believes that this transformation will enable the Company to shift the portfolio from the mature, lower-growth markets where we have competed in the past by investing in technology and products that provide access to larger and faster growing markets. As such, we believe the growth in the near to mid-term will be driven by our high technology products including Auryon, Mechanical Thrombectomy (which includes AngioVac and thrombolytics) and NanoKnife. We will refer to these high technology product lines as our Med Tech business and we will refer to the remainder of the portfolio as our Med Device business.

Throughout the year, we introduced strategic moves designed to streamline our business, improve our overall business operations and position ourselves for growth. Those initiatives included:

•Product development process. The Company continued its disciplined product development process which is intended to improve the Company’s ability to bring new products to market. This included the launch of Auryon and SmartPort+, along with continued research and development activities to expand on our Mechanical Thrombectomy portfolio.

•Value Creation. To create value and drive future growth, the Company plans to practice dispassionate portfolio optimization and continue to focus on areas of compelling unmet needs including those that are patient-centric and evidenced-based. In addition, the Company is pursuing targeted global expansion opportunities.

Critical Accounting Policies and Use of Estimates

Our significant accounting policies are summarized in Note 1 "Basis of Presentation, Business Description and Summary of Significant Accounting Policies" in the Consolidated Financial Statements included in our Form 10-K. While all of these significant accounting policies affect the reporting of our financial condition and results of operations, we view certain of these policies as critical. Policies determined to be critical are those policies that have the most significant impact on our financial statements and require us to use a greater degree of judgment and/or estimates. Actual results may differ from those estimates.

Revenue Recognition

Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company contracts with its customers based on customer purchase orders, which in many cases are governed by master purchasing agreements. The Company’s contracts with customers are generally for product only, and do not include other performance obligations such as services or other material rights. As part of its assessment of each contract, the Company evaluates certain factors including the customer’s ability to pay (or credit risk). For each contract, the Company considers the promise to transfer products, each of which is distinct, to be the identified performance obligations.

Transaction prices of products are typically based on contracted rates. Product revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products to a customer. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing the expected value method. As such, revenue is recorded net of rebates, returns and other deductions.

If a contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the

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estimated relative standalone selling prices of the promised products underlying each performance obligation. The Company has standard pricing for its products and determines standalone selling prices based on the price at which the performance obligation is sold separately. Contracts with our customers typically include a single performance obligation related to the sale of our products.

Revenue is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which occurs at a point in time, and may be upon shipment from the Company’s manufacturing site or delivery to the customer’s named location, based on the contractual shipping terms of a contract. In determining whether control has transferred, the Company considers if there is a present right to payment from the customer and when physical possession, legal title and risks and rewards of ownership have transferred to the customer.

The Company typically invoices customers upon satisfaction of identified performance obligations. As the Company’s standard payment terms are 30 to 90 days from invoicing, the Company does not provide any significant financing to its customers. Sales, value add, and other taxes collected on behalf of third parties are excluded from revenue.

The Company enters into agreements to place placement and evaluation units (“units”) at customer sites, but the Company retains title to the units. The duration of these agreements are typically a year and the customer has the right to use the unit at no upfront charge in connection with the customer’s ongoing purchase of disposables. These types of agreements include an embedded operating lease for the right to use the units. In these arrangements, revenue recognized for the sale of the disposables is not allocated between the disposal revenue and lease revenue due to the insignificant value of the units in relation to the total agreement value.

Revenues from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established for discounts, returns, rebates and allowances that are offered within contracts between the Company and its customers. These reserves are based on the amounts earned or to be claimed on the related sales and are classified as a current liability.

A receivable is recognized in the period the Company ships the product. Payment terms on invoiced amounts are based on contractual terms with each customer and generally coincide with revenue recognition. Accordingly, the Company does not have any contract assets associated with the future right to invoice its customers. In some cases, if control of the product has not yet transferred to the customer or the timing of the payments made by the customer precedes the Company’s fulfillment of the performance obligation, the Company recognizes a contract liability that is included in deferred revenue in the accompanying consolidated balance sheets.

The Company provides certain customers with rebates and allowances that are explicitly stated in the Company’s contracts and are recorded as a reduction of revenue in the period the related product revenue is recognized. The Company establishes a liability for such amounts, which is included in accrued expenses in the accompanying consolidated balance sheets. These rebates and allowances result from performance-based offers that are primarily based on attaining contractually specified sales volumes and administrative fees the Company is required to pay to group purchasing organizations.

The Company generally offers customers a limited right of return. Product returns after 30 days must be pre-approved by the Company and customers may be subject to a 20% restocking charge. To be accepted, a returned product must be unadulterated, undamaged and have at least twelve months remaining prior to its expiration date. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The Company currently estimates product return liabilities using its historical product return information and considers other factors that it believes could significantly impact its expected returns, including product recalls. During the year ended May 31, 2021, such product returns were not material.

Inventory

Inventories are stated at the lower of cost or net realizable value based on the first-in, first-out cost method and consist of raw materials, work in process and finished goods. Appropriate consideration is given to deterioration, obsolescence, expiring and other factors in evaluating net realizable value. When we evaluate inventory for excess quantities and obsolescence, we utilize historical product usage experience and expected demand for establishing our reserve estimates. Our actual product usage may vary from the historical experience and estimating demand is inherently difficult which may result in us recording excess and obsolete inventory amounts that do not match the required amounts. An increase to inventory reserves results in a corresponding increase in cost of revenue. Inventories are written off against the reserve when they are physically disposed.

Acquisitions and Contingent Consideration

The Company allocates the purchase price of acquired companies to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The estimates used to value the net assets acquired are based in part on

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historical experience and information obtained from the management of the acquired company. The Company generally values the identifiable intangible assets acquired using a discounted cash flow model. The significant estimates used in valuing certain of the intangible assets include, but are not limited to: future expected cash flows of the asset, discount rates to determine the present value of the future cash flows, attrition rates of customers, royalty rates and expected technology life cycles. The Company also estimates the useful lives of the intangible assets based on the expected period over which the Company anticipates generating economic benefit from the asset.

The Company’s estimates of fair value are based on assumptions believed to be reasonable at that time. If management made different estimates or judgments, material differences in the fair values of the net assets acquired may result.

Certain of the Company’s business combinations involve potential payment of future consideration that is contingent upon the achievement of certain product development milestones and/or contingent on the acquired business reaching certain performance milestones. The Company records contingent consideration at fair value at the date of acquisition based on the consideration expected to be transferred, estimated as the probability weighted future cash flows, discounted back to present value. The fair value of contingent consideration is measured using projected payment dates, discount rates, probabilities of payment, and projected revenues (for revenue-based considerations). Projected revenues are based on the Company’s most recent internal operational budgets and long-range strategic plans. The discount rate used is determined at the time of measurement in accordance with accepted valuation methodologies. Changes in projected revenues, probabilities of payment, discount rates, and projected payment dates may result in adjustments to the fair value measurements. Contingent consideration is remeasured each reporting period using Level 3 inputs, and the change in fair value, including accretion for the passage of time, is recognized as income or expense within operating expenses in the consolidated statements of income. Contingent consideration payments made soon after the acquisition date are classified as investing activities in the consolidated statements of cash flows. Contingent consideration payments not made soon after the acquisition date that are related to the acquisition date fair value are reported as financing activities in the consolidated statements of cash flows, and amounts paid in excess of the original acquisition date fair value are reported as operating activities in the consolidated statements of cash flows.

Goodwill and Intangible Assets

Intangible assets other than goodwill, indefinite lived intangible assets and in process research and development ("IP R&D") are amortized over their estimated useful lives, which range between two to eighteen years, on either a straight-line basis over the expected period of benefit or as revenue is earned from the sales of the related product. The Company periodically reviews the estimated useful lives of intangible assets and reviews such assets for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Such conditions could include significant adverse changes in the business climate, current-period operating or cash flow losses, significant declines in forecasted operations, or a current expectation that an asset group will be disposed of before the end of its useful life. When testing for impairment of definite-lived intangible assets held for use, the Company groups assets at the lowest level for which cash flows are separately identifiable. The Company operates as a single asset group. If a triggering event is deemed to exist, the Company performs an undiscounted operating cash flow analysis to determine if an impairment exists. If an intangible asset is considered to be impaired, the amount of the impairment will equal the excess of the carrying value over the fair value of the asset.

Goodwill and other intangible assets that have indefinite useful lives are not amortized, but rather, are tested for impairment annually or more frequently if impairment indicators arise. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination. Goodwill and intangible assets have been recorded at either incurred or allocated cost. Allocated costs were based on respective fair market values at the date of acquisition.

For goodwill, the impairment test requires a comparison of the estimated fair value of the reporting unit to which the goodwill is assigned to the carrying value of the assets and liabilities of that reporting unit. The determination of reporting units also requires management judgment. The Company considers whether a reporting unit exists within a reportable segment based on the availability of discrete financial information. The Company operates as a single operating segment with one reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. If the carrying value of the reporting unit exceeds the fair value of the reporting unit, the carrying value is reduced to its fair value through an adjustment to the goodwill balance, resulting in an impairment charge.

Determining the fair value of a reporting unit is judgmental and requires the use of significant estimates and assumptions, including revenue growth rates, operating margins, discount rates and future market conditions, among others. Changes in assumptions or estimates could materially affect the estimated fair value, and therefore could affect the likelihood and amount of a potential impairment.

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As detailed in Note 9, "Goodwill and Intangible Assets" in the Consolidated Financial Statements including on our Form 10-K, during the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. In the fourth quarter of fiscal year 2020, the Company recorded a goodwill impairment loss of $158.6 million as the fair value of the reporting unit was less than its carrying value. There were no adjustments to goodwill for the year ended May 31, 2021 other than foreign currency translation adjustments.

Results of Operations for the years ended May 31, 2021 and 2020

For the fiscal year ended May 31, 2021, we reported net loss from continuing operations of $31.5 million, or $0.82 loss per diluted share, on net sales of $291.0 million compared to a fiscal year 2020 net loss of $166.8 million, or $4.39 loss per diluted share, on net sales of $264.2 million.

Net Sales

Net sales - Net sales are derived from the sale of our products and related freight charges, less discounts, rebates and returns.

Net sales for the year ended May 31, 2021 and 2020 were:

	Year ended May 31,
(in thousands)	2021		2020		% Change
Net Sales by Product Category
Endovascular Therapies	$	135,079	$	112,706	19.9	%
Vascular Access	101,310		94,299		7.4	%
Oncology/Surgery	54,621		57,152		(4.4)	%
Total	$	291,010	$	264,157	10.2	%
Net Sales by Geography
United States	$	237,043	$	207,980	14.0	%
International	53,967		56,177		(3.9)	%
Total	$	291,010	$	264,157	10.2	%

For the year ended May 31, 2021, net sales increased $26.9 million to $291.0 million compared to the year ended May 31, 2020. The prior year net sales numbers, specifically in the fourth quarter, were significantly impacted by the COVID-19 global pandemic.

Endovascular Therapies

•Total Endovascular Therapies sales increased $22.4 million or 19.9%. Auryon, which was acquired as part of the Eximo acquisition in the second quarter of fiscal year 2020, contributed $11.1 million in disposable sales. The AngioVac business grew $8.0 million as the Company continued to see increased case volumes in AngioVac, which increased 39% from the prior year. Additionally, Core Peripheral product sales increased $5.6 million. EVLT remained consistent with the prior year.

•U.S. Endovascular Therapies net sales increased $22.5 million due to increased case volume in AngioVac, increased Core Peripheral product sales and $11.1 million in sales of Auryon. These increases were partially offset by decreased sales volume in EVLT.

•International Endovascular Therapies net sales decreased $0.1 million.

Vascular Access

•Total Vascular Access sales increased $7.0 million due to increased sales of PICCs, Ports, Midlines and Dialysis of $2.5 million, $1.3 million, $3.1 million and $0.1 million, respectively. These increases are partially the result of a large order in the United Kingdom related to the COVID-19 pandemic for $5.2 million in the first quarter of fiscal year 2021 along with the distribution agreement with MedComp for the sale of certain PICC products. BioFlo product lines comprised 52% of overall Vascular Access sales compared to 51% in the prior year.

•U.S. Vascular Access net sales increased $4.3 million primarily due to increased PICCs, Ports and Midline sales of $1.1 million, $1.4 million and $1.5 million, respectively. These increases are attributed to a group purchasing

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organization agreement that was signed in the third quarter of the prior fiscal year, new strategic relationships and the launch of SmartPort+.

•International Vascular Access net sales increased by $2.7 million primarily as a result of a large order in the United Kingdom related to the COVID-19 pandemic for $5.2 million. This was partially offset by decreased PICC sales in Latin America of $1.6 million.

Oncology/Surgery

•Total Oncology/Surgery sales decreased $2.5 million year over year. The sales were significantly impacted by the challenging capital spending environment as a result of the COVID-19 pandemic, as Microwave and NanoKnife capital sales decreased $4.2 million. Of this decrease, $2.1 million is due to a large NanoKnife distributor order in the Asia-Pacific region ("APAC") in the prior year. Radiofrequency Ablation sales also decreased $1.6 million, Balloon product sales decreased by $1.1 million and other sales decreased $0.7 million. These decreases were partially offset by increased Microwave and NanoKnife disposable sales of $2.1 million and $1.2 million, respectively, and increased BioSentry sales of $2.0 million.

•U.S. Oncology net sales increased by $2.3 million primarily due to increased NanoKnife disposable sales of $1.5 million, BioSentry sales of $2.0 million and Microwave disposable sales of $1.3 million. The increased NanoKnife disposable sales is the result of the increased capital base that was developed in the prior year along with increased case volumes as hospitals have begun to lift restrictions on procedures. This was partially offset by decreased NanoKnife capital sales of $1.1 million and Balloon product sales of $1.1 million.

•International Oncology sales decreased $4.8 million year over year. The decrease was driven by lower NanoKnife capital and disposable sales of $3.0 million and decreased Radiofrequency Ablation sales of $2.1 million as a result of market pressures and hospital restrictions due to the COVID-19 pandemic. Of the $3.0 million decrease in NanoKnife capital and disposable sales, $2.1 million was related to a NanoKnife distributor order in APAC in the prior year.

Gross Profit, Operating expenses, and Other income (expense)

	Year ended May 31,
(in thousands)	2021			2020			% Change
Gross profit (exclusive of intangible amortization)	$	156,788		$	150,272		4.3	%
Gross profit % of sales	53.9		%	56.9		%
Research and development	$	36,390		$	29,682		22.6	%
% of sales	12.5		%	11.2		%
Selling and marketing	$	81,306		$	78,634		3.4	%
% of sales	27.9		%	29.8		%
General and administrative	$	35,918		$	37,872		(5.2)	%
% of sales	12.3		%	14.3		%

Gross profit - Gross profit consists of net sales less the cost of goods sold, which includes the costs of materials, products purchased from third parties and sold by us, manufacturing personnel, royalties, freight, business insurance, depreciation of property and equipment and other manufacturing overhead, exclusive of intangible amortization.

While gross profit increased by $6.5 million compared to the prior year, gross profit as a percentage of sales decreased 300 basis points. The change is primarily attributable to the following:

•Sales volume positively impacted gross profit by $16.6 million year over year;

•Net productivity negatively impacted gross profit by $10.0 million primarily as a result of under absorption, and to a lesser extent inflation, of $5.1 million and start-up costs of $4.0 million related to the Auryon launch. The under absorption in manufacturing operations was due to the Company maintaining staffing levels during the COVID-19 global pandemic to mitigate risk, along with a focus on working capital management through inventory reduction;

•Mix negatively impacted gross margin by $0.8 million as a result of the large order in the United Kingdom for lower gross margin products and decreased NanoKnife capital sales. This was partially offset by increased AngioVac sales; and

•A benefit of $0.7 million was recorded to gross profit which represents a portion of the employee retention credit that the Company filed for under the provisions of the CARES Act in the third quarter of the current year.

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Research and development expense - Research and development (“R&D”) expense includes internal and external costs to develop new products, enhance existing products, validate new and enhanced products, manage clinical, regulatory and medical affairs.

R&D expense increased $6.7 million compared to the prior year. The increase is primarily attributable to the following:

•AngioVac platform expansion, the NanoKnife DIRECT© study and the Pathfinder study increased $3.6 million and Auryon related expenses increased by $2.7 million;

•Outside consultant expense and other expense increased $0.5 million and travel expenses decreased $0.5 million;

•Compensation and benefits increased $0.7 million, of which $0.4 million related to variable compensation; and

•A benefit of $0.3 million was recorded to R&D expense which represents a portion of the employee retention credit that the Company filed for under the provisions of the CARES Act in the third quarter of the current year.

Sales and marketing expense - Sales and marketing (“S&M”) expense consists primarily of salaries, commissions, travel and related business expenses, attendance at medical society meetings, product promotions and marketing activities.

S&M expense increased by $2.7 million compared to the prior year. The increase is primarily attributable to the following:

•Expense related to the build-out of the Auryon sales and marketing teams to prepare for full product launch of $7.7 million;

•Travel expense decreased $2.4 million due to less travel as a result of the COVID-19 pandemic. In addition, tradeshow and other expense decreased $1.2 million primarily due to the cancellation of events;

•Compensation and benefits decreased $0.7 million due to decreased salaries as a result of open roles partially offset by increased variable compensation and commissions; and

•A benefit of $0.9 million was recorded to sales and marketing expense which represents a portion of the employee retention credit that the Company filed for under the provisions of the CARES Act in the third quarter of the current year.

General and administrative expense - General and administrative (“G&A”) expense includes executive management, finance, information technology, human resources, business development, legal, and the administrative and professional costs associated with those activities.

G&A expense decreased by $2.0 million compared to the prior year. The decrease is primarily attributable to the following:

•Legal and professional fees relating to ongoing litigation that is within the normal course of business decreased $3.7 million;

•Compensation and benefits increased approximately $2.1 million primarily as a result of increased variable compensation and stock based compensation expense; and

•Decreased consulting and other expense of $0.1 million and decreased travel expense of $0.2 million as a result of the COVID-19 pandemic.

	Year ended May 31,
(in thousands)	2021		2020		$ Change
Amortization of intangibles	$	18,136	$	18,121	$	15
Goodwill impairment	$	—	$	158,578	$	(158,578)
Change in fair value of contingent consideration	$	89	$	(11,531)	$	11,620
Acquisition, restructuring and other items, net	$	20,232	$	6,014	$	14,218
Other expense	$	(769)	$	(1,037)	$	268

Amortization of intangibles - Represents the amount of amortization expense that was taken on intangible assets held by the Company.

•Amortization expense remained consistent compared to the prior year.

Goodwill Impairment - Represents the impairment charge taken on goodwill.

•The Company recorded a non-cash goodwill impairment charge of $158.6 million for the year ended May 31, 2020 as the fair value of the reporting unit was less than its carrying value. There were no adjustments to goodwill for the year ended May 31, 2021 other than foreign currency translation adjustments.

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Change in fair value of contingent consideration - Represents changes in contingent consideration driven by changes to estimated future payments on earn-out liabilities created through acquisitions and amortization of present value discounts on long-term contingent consideration.

•The change is primarily due to RadiaDyne revised sales projections and a technical milestone that would not be achieved. This resulted in a $9.2 million and $2.7 million reduction in the fair value of the contingent liability in the prior year.

•During the current year, a decision was made to no longer pursue the final RadiaDyne technical milestone, which resulted in a reduction in the liability of $0.8 million. This reduction in the fair value was offset by normal amortization of the present value of the Eximo contingent consideration recorded in the second quarter of fiscal year 2020.

Acquisition, restructuring and other items, net - Acquisition, restructuring and other items, net represents costs associated with mergers and acquisitions, restructuring expenses, legal costs that are related to litigation that is not in the ordinary course of business, legal settlements and other one-time items.

Acquisition, restructuring and other items, net increased by $14.2 million compared to the prior year. The increase is attributable to the following:

•Legal expense, related to litigation that is outside of the normal course of business, of $6.2 million was recorded in fiscal year 2021 compared to $2.7 million in the prior year. Included in legal for fiscal year 2021, is a $1.0 million settlement expense;

•There was no M&A expense incurred in fiscal year 2021 compared to $0.8 million in the prior year;

•In fiscal year 2021, the Company incurred $0.4 million of expense to move manufacturing facilities as a result of the sale of the Fluid Management business compared to $2.8 million in the prior year;

•As part of the sale of the Fluid Management business, the Company entered into a transition services agreement with Medline for certain legal, human resource, tax, accounting and information technology services from the Company for a period not to exceed 24 months. As a result of the transition services agreement, the Company invoiced Medline $1.0 million in fiscal year 2021 compared to $1.8 million in the prior year;

•Other expenses of $0.8 million consists of severance associated with organizational changes, compared to $1.5 million in the prior year; and

•A $14.0 million impairment charge was recorded in fiscal year 2021 as a result of the decision to abandon the OARtrac product technology and trademark.

Other expense - Other expense includes interest expense, foreign currency impacts, bank fees, and amortization of deferred financing costs.

•The decrease in other expense from the prior year of $0.3 million is primarily due to foreign currency unrealized gains of $0.4 million and the prior year write-off of deferred financing fees associated with the old Credit Facility of $0.6 million. This was partially offset by increased interest expense of $0.2 million for the $20.0 million outstanding on the Revolving Facility at the end of fiscal year 2021 compared to $40.0 million outstanding in the prior year. In addition, interest income decreased by $0.3 million.

Income Tax Benefit

	Year ended May 31,
(in thousands)	2021			2020
Income tax benefit	$	(4,504)		$	(1,348)
Effective tax rate	12		%	1		%

Our effective tax rate was a benefit of 12% for fiscal year 2021 compared with an effective tax rate benefit of 1% for the prior year. The current year effective tax rate differs from the U.S. statutory rate primarily due to the impact of the valuation allowance, foreign taxes, and other non-deductible permanent items (such as non-deductible meals and entertainment, Section 162(m) excess compensation and non-deductible share-based compensation). The prior year effective tax rate differs from the U.S. Federal statutory tax rate of 21% primarily due to no tax benefit being recorded on the goodwill impairment of $158.6 million.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity.

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Evidence the Company considered included its history of net operating losses, which resulted in the Company recording a full valuation allowance for its deferred tax assets in fiscal year 2016, except the naked credit deferred tax liability.

Based on the review of all available evidence, the Company determined that it has not yet attained a sustained level of profitability and the objectively verifiable negative evidence outweighed the positive evidence. Therefore, the Company has provided a valuation allowance on its federal and state net operating loss carryforwards, federal and state R&D credit carryforwards and other net deferred tax assets that have a limited life and are not supportable by the naked credit deferred tax liability sourced income as of May 31, 2021. The Company will continue to assess the level of the valuation allowance required. If sufficient positive evidence exists in future periods to support a release of some or all of the valuation allowance, such a release would likely have a material impact on the Company’s results of operations.

Liquidity and Capital Resources

We regularly review our liquidity and anticipated capital requirements in light of the significant uncertainty created by the COVID-19 global pandemic. We believe that our current cash on hand and availability under our Revolving Facility provide sufficient liquidity to meet our anticipated needs for capital for at least the next 12 months. We are closely monitoring receivables and payables.

Our cash and cash equivalents totaled $48.2 million as of May 31, 2021, compared with $54.4 million as of May 31, 2020. As of May 31, 2021, total debt outstanding related to the Revolving Facility was $20.0 million. The fair value of the contingent consideration liability as of May 31, 2021 was $15.7 million.

The table below summarizes our cash flows for the years ended May 31, 2021 and 2020:

	Year ended May 31,
(in thousands)	2021		2020
Cash provided by (used in):
Operating activities	$	24,093	$	(14,554)
Investing activities	(13,711)		(63,345)
Financing activities	(16,986)		(95,242)
Effect of exchange rate changes on cash and cash equivalents	330		(65)
Net change in cash and cash equivalents	$	(6,274)	$	(173,206)

During the years ended May 31, 2021 and 2020, cash flows consisted of the following:

Cash provided by (used in) operating activities:

Year ended 2021:

•Net loss of $31.5 million, plus the non-cash items, primarily driven by depreciation and amortization and share-based compensation, along with the changes in working capital below, contributed to cash provided by operations of $24.1 million.

•In fiscal year 2021, working capital was favorably impacted by decreased inventory on hand of $11.5 million and increased accounts payable and accrued liabilities of $4.9 million. This was partially offset by increased accounts receivable of $4.2 million.

Year ended 2020:

•Net loss of $166.8 million plus the non-cash items, primarily driven by the goodwill impairment, depreciation and amortization and share-based compensation, along with the changes in working capital below, contributed to cash used in operations of $14.6 million.

•Working capital was negatively impacted by increased inventory on hand of $18.8 million and decreased accounts payable and accrued liabilities of $15.5 million. Accounts receivable had a favorable impact of $11.9 million on working capital as a result of the sale of the Fluid Management business and decreased sales in the fourth quarter as a result of the impact from COVID-19.

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Cash used in investing activities:

Year ended 2021:

•$5.2 million of cash was used for fixed asset additions and $8.5 million of Auryon placement and evaluation units.

Year ended 2020:

•$45.8 million payment to acquire Eximo Medical Ltd. and $10.0 million payment to acquire the C3 Wave tip location asset from Medical Components, Inc. Refer to Note 2 of the financial statements; and

•$7.2 million in fixed asset additions primarily related to building improvements along with maintenance of equipment.

Cash used in financing activities:

Year ended 2021:

•$20.0 million in payments on the Revolving Facility in fiscal year 2021; and

•$3.0 million of proceeds from stock option and ESPP activity.

Year ended 2020:

•$132.5 million repayment of long-term debt in conjunction with the new Credit Agreement that was entered into at the beginning of the first quarter of fiscal year 2020. Refer to Note 12 of the financial statements;

•$40.0 million draw on the Revolving Facility;

•$0.8 million of outlays from stock option and ESPP activity; and

•$1.2 million payment on earn-out liabilities.

On June 3, 2019 and in connection with the completion of the Fluid Management divestiture, the Company repaid all amounts outstanding under its existing Credit Agreement and entered into a new Credit Agreement. The Credit Agreement provides for a $125.0 million secured Revolving Facility, which includes an uncommitted expansion feature that allows the Company to increase the total revolving commitments and/or add new tranches of term loans in an aggregate amount not to exceed $75.0 million.  The Credit Agreement includes customary representations, warranties and covenants, and acceleration, indemnity and events of default provisions, including, among other things, two financial covenants. One financial covenant requires us to maintain a fixed charge coverage ratio of not less than 1.25 to 1.00. The other financial covenant requires us to maintain a total leverage ratio of not greater than 3.00 to 1.00. The total leverage ratio is based upon our trailing twelve months total adjusted EBITDA (as defined in the Credit Agreement). The amount that we can borrow under our Credit Agreement is directly based on our leverage ratio. The interest rate on the Revolving Facility at May 31, 2021 was 1.36%.

On December 17, 2019, the Company made a $15.0 million draw on the Revolving Facility as part of the acquisition of the C3 Wave tip location asset from Medical Components Inc. that is described Note 2 to the financial statements. In the fourth quarter of fiscal year 2020, the Company made an additional $25.0 million draw on the Revolving Facility. In December 2020 and March 2021, payments of $10.0 million each were made on the Revolving Facility. We believe that our current cash balance, together with cash generated from operations and access to our Revolving Facility, will provide sufficient liquidity to meet our anticipated needs for capital for at least the next 12 months. If we seek to make acquisitions of other businesses or technologies in the future for cash, we may require external financing.

Our contractual obligations as of May 31, 2021 are set forth in the table below (in thousands). We have no variable interest entities or other off-balance sheet obligations.

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	Cash payments due by period as of May 31, 2021
(in thousands)	Total		Less than One Year		1-3 Years		3-5 Years		After 5 Years
Contractual Obligations:
Long term debt and interest	$	21,008	$	504	$	20,504	$	—	$	—
Operating leases (1)	10,724		2,923		5,032		2,598		171
Purchase obligations (2)	4,697		4,697		—		—		—
Acquisition-related future obligations (3)	20,000		—		15,000		5,000		—
Royalties	47,700		3,800		7,600		7,600		28,700
Litigation matters	975		975		—		—		—
	$	105,104	$	12,899	$	48,136	$	15,198	$	28,871

(1) Operating leases include short-term leases that are not recorded on our consolidated balance sheet under ASU No. 2016-02.

(2) The inventory purchase obligations are not reflected on our consolidated balance sheets under accounting principles generally accepted in the United States of America.

(3) Acquisition-related future obligations include scheduled minimum payments and contingent payments based upon achievement of performance measures or milestones such as sales or profitability targets, the achievement of research and development objectives or the receipt of regulatory approvals. The amount represents the undiscounted value of contingent liabilities recorded on the balance sheet. Timing of payments are as contractually scheduled, or where contingent, the Company's best estimate of payment timing.

Results of Operations for the years ended May 31, 2020 and 2019

For management discussion and analysis of our 2020 financial results and liquidity compared with 2019, see Part II, Item 7 "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended May 31, 2020 filed on August 10, 2020.

Recent Accounting Pronouncements

Refer to Note 1 of the Notes to the Consolidated Financial Statements for Recently Issued Accounting Pronouncements.

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Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

FOREIGN CURRENCY EXCHANGE RATE RISK

We are exposed to market risk from changes in currency exchange rates, as well as interest rate fluctuations on our credit facility and investments that could impact our results of operations and financial position.

We transact sales in currencies other than the U.S. Dollar, particularly the Euro, British pound and Canadian dollar. Approximately 6.6% of our sales in fiscal year 2021 were denominated in foreign currencies. We do not have expenses denominated in foreign currencies at the level of our sales and as a result, our profitability is exposed to currency fluctuations. When the U.S. Dollar strengthens, our sales and gross profit will be negatively impacted. In addition, we have assets and liabilities denominated in non-functional currencies which are remeasured at each reporting period, with the offset to changes presented as a component of Other (Expense) Income. Significant non-functional balances include accounts receivable due from some of our international customers.

INTEREST RATE RISK

On June 3, 2019, we entered into the Credit Agreement which provides for a $125.0 million Revolving Facility. Interest on the facility will be based, at the Company’s option, on either a base rate of LIBOR or alternate base rate, plus an applicable margin tied to the Company’s total leverage ratio and having ranges between 0.25% and 0.75% for base rate loans and between 1.25% and 1.75% for LIBOR loans. In the event of default, the interest rate may be increased by 2.0%. As of May 31, 2021, there was $20.0 million outstanding on the Revolving Facility. The interest rate on the Revolving Facility at May 31, 2021 was 1.36%.

CONCENTRATION OF CREDIT RISK

Financial instruments, which potentially subject the Company to significant concentrations of credit risk, consist primarily of cash and cash equivalents, our credit facility and trade accounts receivable.

The Company maintains cash and cash equivalents at various institutions and performs periodic evaluations of the relative credit standings of these financial institutions to ensure their credit worthiness. In addition, the Credit Agreement is structured across five investment grade banks. The Company has the ability to draw equally amongst the five banks which limits the concentration of credit risk of one institution.

Concentration of credit risk with respect to trade accounts receivable is limited due to the large number of customers that purchase products from the Company. No single customer represents more than 10% of total sales. The Company monitors the creditworthiness of its customers. As the Company’s standard payment terms are 30 to 90 days from invoicing, the Company does not provide any significant financing to its customers. Although the Company does not currently foresee a significant credit risk associated with the outstanding accounts receivable, repayment is dependent upon the financial stability of our customers.

Item 8. Financial Statements and Supplementary Data.

Financial statements and supplementary data required by Part II, Item 8 are included in Part IV of this report and indexed under Item 15 (a) (1) and (2) of this report, and are incorporated by reference into this Item 8. 

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None. 

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Item 9A. Controls and Procedures.

Evaluation of disclosure controls and procedures

As of the end of the period covered by this report, our management, under the supervision and with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) of the Securities Exchange Act of 1934, as amended. Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this report were effective to provide reasonable assurance that the information required to be disclosed by us in reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms and is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting for our Company. Internal control over financial reporting is defined in Rules 13a-15(f) and 15d-15(f) promulgated under the Securities Exchange Act of 1934, as amended, as a process designed by, or under the supervision of, our principal executive and principal financial officers and effected by our Board of Directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States and includes those policies and procedures that:

•Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets;

•Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with accounting principles generally accepted in the United States, and that our receipts and expenditures are being made only in accordance with authorizations of our management and members of our Board of Directors; and

•Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Our management has assessed the effectiveness of our internal control over financial reporting as of May 31, 2021. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework (2013). Based on this evaluation, management concluded that our internal control over financial reporting was effective as of May 31, 2021.

The effectiveness of our internal control over financial reporting as of May 31, 2021 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which appears herein.

Changes in Internal Control over Financial Reporting    

There was no change in our internal control over financial reporting for the fiscal quarter ended May 31, 2021 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

44

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of

AngioDynamics, Inc.

Latham, New York

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of AngioDynamics, Inc. and subsidiaries (the “Company”) as of May 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of May 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended May 31, 2021, of the Company and our report dated July 27, 2021, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

July 27, 2021

45

Item 9B. Other Information.

    None.

46

Part III

Certain information required by Part III is omitted from this Annual Report on Form 10-K because we will file a definitive proxy statement within 120 days after the end of our fiscal year end pursuant to Regulation 14A (the “Proxy Statement”) for our Annual Meeting of Stockholders, currently scheduled for October 2021. The information included in the Proxy Statement under the respective headings noted below is incorporated herein by reference.

Item 10. Directors, Executive Officers and Corporate Governance.

Information required in this Annual Report on Form 10-K with respect to Executive Officers is contained in the discussion titled “Executive Officers of the Company” in Part I of this Annual Report on Form 10-K. The balance of the information required by Item 10 is incorporated herein by reference to our Proxy Statement under the heading “Election of Directors”. 

Item 11. Executive Compensation.

The information required by Item 11 is incorporated herein by reference to our Proxy Statement under the heading “Executive Compensation”. 

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this caption is incorporated herein by reference to our Proxy Statement under the heading “Ownership of Securities”. 

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by this caption is incorporated herein by reference to our Proxy Statement under the heading “Certain Relationships and Related Transactions”. 

Item 14. Principal Accounting Fees and Services.

The information required by this caption is incorporated herein by reference to our Proxy Statement under the headings “Audit Matters—Principal Accounting Fees and Services and—Policy on Audit Committee Pre-approval of Audit and Permissible Non-Audit Services of Independent Registered Public Accounting Firm”.

47

Part IV

Item 15. Exhibits, Financial Statement Schedules.

(a)(1) Financial Statements

The following consolidated financial statements and supplementary data of Registrant and its subsidiaries required by Part II, Item 8, are included in Part IV of this report:

Report of Independent Registered Public Accounting Firms	49
Consolidated statements of operations—Year ended May 31, 2021, 2020 and 2019	51
Consolidated statements of comprehensive income (loss) - Year ended May 31, 2021, 2020 and 2019	52
Consolidated balance sheets—May 31, 2021 and May 31, 2020	53
Consolidated statements of stockholders’ equity—Year ended May 31, 2021, 2020 and 2019	54
Consolidated statements of cash flows—Year ended May 31, 2021, 2020 and 2019	55
Notes to consolidated financial statements	57

(2) Financial Statement Schedules

The following consolidated financial statement schedule is included in Part IV of this report:

Schedule II—Valuation and qualifying accounts 84

All other schedules are omitted because they are not applicable, not required, or because the required information is included in the consolidated financial statements or notes thereto. 

(b) Exhibits 85

48

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of

AngioDynamics, Inc.

Latham, New York

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of AngioDynamics, Inc. and subsidiaries (the "Company") as of May 31, 2021 and 2020, the related consolidated statements of operations, comprehensive income (loss), stockholders' equity, and cash flows, for each of the three years in the period ended May 31, 2021, and the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of May 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended May 31, 2021, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of May 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated July 27, 2021, expressed an unqualified opinion on the Company's internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Inventories – Excess Quantities and Obsolescence — Refer to Notes 1 & 6

Critical Audit Matter Description

The Company evaluates inventory each reporting period for excess quantities and obsolescence, establishing reserves when necessary based upon historical experience, assessment of economic conditions, and expected demand. Once recorded, these reserves are considered permanent adjustments to the carrying value of inventory. As of May 31, 2021, the Company has inventories of $48.6 million, net of excess quantities and obsolescence reserves.

We identified the reserve for excess quantities and obsolete inventory as a critical audit matter because of the significant estimates and assumptions management makes to quantify and to record the reserve, including the determination of expected demand. This required a high degree of auditor judgment and an increased extent of effort when performing audit procedures to evaluate the methodology and the reasonableness of assumptions including expected demand.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the reserve for excess quantities and obsolete inventory including management’s estimate of expected demand, included the following, among others:

•We tested the effectiveness of controls over inventory, including those over the estimation of reserves for excess quantities and obsolescence.

•We evaluated the reasonableness of the Company's excess and obsolete inventory policy, considering historical experience and the underlying assumptions.

•We tested the calculation of the excess and obsolete reserve pursuant to the Company's policy, on a sample basis, including the completeness and accuracy of the data used in the calculation.

•We performed a retrospective review by comparing management’s prior year projections of future demand by product, with actual product sales in the current year to identify potential bias in the inventory reserve.

49

•We held discussions with senior financial and operating management to determine whether any strategic, regulatory, or operational changes in the business were consistent with the projections of future demand that were utilized as the basis for the reserves recorded.

•We considered the existence of contradictory evidence based on consideration of internal communication to management and the board of directors, Company press releases, and analysts' reports, as well as any changes within the business.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

July 27, 2021

We have served as the Company’s auditor since 2016.

50

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

	Year ended May 31,
	2021		2020		2019
Net sales	$	291,010	$	264,157	$	270,634
Cost of sales (exclusive of intangible amortization)	134,222		113,885		114,634
Gross profit	156,788		150,272		156,000
Operating expenses
Research and development	36,390		29,682		28,258
Sales and marketing	81,306		78,634		76,829
General and administrative	35,918		37,872		34,902
Amortization of intangibles	18,136		18,121		17,056
Goodwill impairment	—		158,578		—
Change in fair value of contingent consideration	89		(11,531)		(6,776)
Acquisition, restructuring and other items, net	20,232		6,014		15,127
Total operating expenses	192,071		317,370		165,396
Operating loss	(35,283)		(167,098)		(9,396)
Other expenses
Interest expense, net	(861)		(907)		(5,099)
Other income (expense), net	92		(130)		(207)
Total other expenses, net	(769)		(1,037)		(5,306)
Loss from continuing operations before income tax benefit	(36,052)		(168,135)		(14,702)
Income tax benefit	(4,504)		(1,348)		(3,556)
Net loss from continuing operations	(31,548)		(166,787)		(11,146)
Income from discontinued operations, net of income tax	—		—		72,486
Net income (loss)	$	(31,548)	$	(166,787)	$	61,340
Loss per share - continuing operations
Basic	$	(0.82)	$	(4.39)	$	(0.30)
Diluted	$	(0.82)	$	(4.39)	$	(0.30)
Income per share - discontinued operations
Basic	$	—	$	—	$	1.93
Diluted	$	—	$	—	$	1.93
Income (loss) per share
Basic	$	(0.82)	$	(4.39)	$	1.64
Diluted	$	(0.82)	$	(4.39)	$	1.64
Weighted average shares outstanding
Basic	38,342		37,961		37,485
Diluted	38,342		37,961		37,485

The accompanying notes are an integral part of these consolidated financial statements.

51

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

	Year ended May 31,
	2021		2020		2019
Net income (loss)	$	(31,548)	$	(166,787)	$	61,340
Other comprehensive income (loss), before tax:
Unrealized gain on marketable securities	—		—		33
Reclassification adjustment for gains included in net income	—		—		(116)
Foreign currency translation gain (loss)	4,494		11		(317)
Other comprehensive income (loss), before tax	4,494		11		(400)
Income tax benefit (expense) related to items of other comprehensive income (loss)	—		—		—
Other comprehensive income (loss), net of tax	4,494		11		(400)
Total comprehensive income (loss), net of tax	$	(27,054)	$	(166,776)	$	60,940

The accompanying notes are an integral part of these consolidated financial statements.

52

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	May 31, 2021		May 31, 2020
Assets
Current Assets
Cash and cash equivalents	$	48,161	$	54,435
Accounts receivable, net of allowances of $1,919 and $2,150, respectively	35,405		31,263
Inventories	48,614		59,905
Prepaid expenses and other	8,699		7,310
Total current assets	140,879		152,913
Property, plant and equipment, net	37,073		28,312
Intangible assets, net	168,977		197,136
Goodwill	201,316		200,515
Other assets	13,193		15,338
Total Assets	$	561,438	$	594,214
Liabilities and Stockholders' Equity
Current Liabilities
Accounts payable	$	19,630	$	19,096
Accrued liabilities	35,459		29,380
Current portion of contingent consideration	—		836
Other current liabilities	2,495		2,133
Total current liabilities	57,584		51,445
Long-term debt	20,000		40,000
Deferred income taxes	19,955		24,057
Contingent consideration, net of current portion	15,741		14,811
Other long-term liabilities	8,701		9,029
Total Liabilities	121,981		139,342
Commitments and Contingencies (Note 17)
Stockholders’ Equity
Preferred stock, par value $0.01 per share, 5,000,000 shares authorized; no shares issued and outstanding	—		—
Common stock, par value $0.01 per share, 75,000,000 shares authorized; 38,920,951 and 38,448,536 shares issued and 38,550,951 and 38,078,536 shares outstanding at May 31, 2021 and 2020, respectively	377		374
Additional paid-in capital	573,507		561,871
Accumulated deficit	(131,866)		(100,318)
Treasury stock, 370,000 shares, at cost at May 31, 2021 and 2020, respectively	(5,714)		(5,714)
Accumulated other comprehensive loss	3,153		(1,341)
Total Stockholders' Equity	439,457		454,872
Total Liabilities and Stockholders' Equity	$	561,438	$	594,214

The accompanying notes are an integral part of these consolidated financial statements.

53

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands, except share data)

	Common Stock			Additional paid in capital		Retained earnings (accumulated deficit)		Accumulated other comprehensive income (loss)		Treasury Stock			Total
	Shares	Amount								Shares	Amount
Balance at May 31, 2018	37,594,493	$	370	$	543,762	$	5,129	$	(952)	(370,000)	$	(5,714)	$	542,595
Net income						61,340							61,340
Exercise of stock options	134,253	1		1,525									1,526
Issuance/cancellation of restricted stock units	177,538			(667)									(667)
Issuance of performance share units	5,235												—
Purchase of common stock under Employee Stock Purchase Plan	72,863	1		1,171									1,172
Stock-based compensation				9,249									9,249
Other comprehensive loss, net of tax								(400)					(400)
Balance at May 31, 2019	37,984,382	$	372	$	555,040	$	66,469	$	(1,352)	(370,000)	$	(5,714)	$	614,815
Net loss						(166,787)							(166,787)
Exercise of stock options	50,636	1		560									561
Issuance/cancellation of restricted stock units	312,951			(2,537)									(2,537)
Purchase of common stock under Employee Stock Purchase Plan	100,567	1		1,216									1,217
Stock-based compensation				7,592									7,592
Other comprehensive income, net of tax								11					11
Balance at May 31, 2020	38,448,536	$	374	$	561,871	$	(100,318)	$	(1,341)	(370,000)	$	(5,714)	$	454,872
Net loss						(31,548)							(31,548)
Exercise of stock options	123,536	1		1,929									1,930
Issuance/cancellation of restricted stock units	184,685			(223)									(223)
Purchase of common stock under Employee Stock Purchase Plan	164,194	2		1,305									1,307
Stock-based compensation				8,625									8,625
Other comprehensive income, net of tax								4,494					4,494
Balance at May 31, 2021	38,920,951	$	377	$	573,507	$	(131,866)	$	3,153	(370,000)	$	(5,714)	$	439,457

The accompanying notes are an integral part of these consolidated financial statements.

54

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Year ended May 31,
	2021		2020		2019
Cash flows from operating activities:
Net income (loss)	$	(31,548)	$	(166,787)	$	61,340
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	25,916		23,805		25,880
Non-cash lease expense	2,456		2,070		—
Goodwill impairment	—		158,578		—
Stock based compensation	8,625		7,592		9,249
Gain on disposition	—		—		(46,592)
Transaction costs for disposition	—		—		(4,030)
Change in fair value of contingent consideration	89		(11,531)		(6,776)
Deferred income tax provision	(4,805)		(1,568)		(2,655)
Changes in accounts receivable allowances	207		429		(202)
Asset impairments and disposals	14,228		1,321		2,495
Other	(147)		86		(5)
Changes in operating assets and liabilities:
Accounts receivable	(4,162)		11,918		(3,177)
Inventories	11,539		(18,845)		(1,428)
Prepaid expenses and other	(3,181)		(6,155)		(1,871)
Accounts payable, accrued and other liabilities	4,876		(15,467)		5,212
Net cash provided by (used in) operating activities	24,093		(14,554)		37,440
Cash flows from investing activities:
Additions to property, plant and equipment	(5,187)		(7,235)		(3,118)
Additions to placement and evaluation units	(8,524)		—		—
Proceeds from disposition of discontinued operations	—		—		169,242
Cash paid for acquisitions	—		(55,760)		(84,920)
Acquisition of intangibles	—		(350)		—
Proceeds from sale of marketable securities	—		—		1,350
Net cash provided by (used in) investing activities	(13,711)		(63,345)		82,554
Cash flows from financing activities:
Repayment of long-term debt	(20,000)		(132,500)		(15,000)
Proceeds from borrowings on long-term debt	—		40,000		55,000
Deferred financing costs on long-term debt	—		(775)		—
Payment of acquisition related contingent consideration	—		(1,208)		(8,100)
Proceeds (outlays) from exercise of stock options and employee stock purchase plan	3,014		(759)		2,031
Net cash provided by (used in) financing activities	(16,986)		(95,242)		33,931
Effect of exchange rate changes on cash and cash equivalents	330		(65)		(380)
(Decrease) increase in cash and cash equivalents	(6,274)		(173,206)		153,545
Cash and cash equivalents at beginning of year	54,435		227,641		74,096
Cash and cash equivalents at end of year	$	48,161	$	54,435	$	227,641

The accompanying notes are an integral part of these consolidated financial statements.

55

AngioDynamics, Inc. and Subsidiaries

CONSOLIDATED STATEMENTS OF CASH FLOWS—(Continued)

(in thousands)

	Year ended May 31,
	2021		2020		2019
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of fixed assets	$	(139)	$	224	$	(114)
Fair value of contingent consideration for acquisitions	—		14,900		25,100
Fair value of acquisition consideration included in accrued expenses	—		—		4,650
Cash paid during the year for:
Interest	$	731	$	413	$	5,115
Income taxes	313		682		426

The accompanying notes are an integral part of these consolidated financial statements.

56

AngioDynamics, Inc. and Subsidiaries

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. BASIS OF PRESENTATION, BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Description of Business

The consolidated financial statements include the accounts of AngioDynamics, Inc. and its wholly owned subsidiaries, (collectively, "us", "we", or the “Company”).

The Company designs, manufactures and sells a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and in oncology and surgical settings. The devices are generally used in minimally invasive, image-guided procedures. Most of the Company's products are intended to be used once and then discarded, or they may be temporarily implanted for short- or long-term use.

On May 31, 2019, the Company completed the sale of the Fluid Management business and all of the assets used primarily in connection with the Fluid Management business (Note 3). As the disposal of this business represents a strategic shift with a major effect on the Company's operations, for all periods presented in the Consolidated Statements of Operations and Comprehensive Income, all sales, costs, expenses, gains and income taxes attributable to Fluid Management have been reported under the captions, “Income from Discontinued Operations, Net of Income Tax.”  Cash flows used in or provided by Fluid Management have been reported in the Consolidated Statements of Cash Flows under operating and investing activities.

Accounting Principles

The consolidated financial statements and accompanying notes have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP").

Principles of Consolidation

The consolidated financial statements include the accounts of AngioDynamics and its subsidiaries (all of which are wholly owned). All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of consolidated financial statements, in conformity with accounting principles generally accepted in the United States of America, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Estimates also affect reported amounts of sales and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all unrestricted highly liquid investments with an initial maturity of less than three months at the date of purchase to be cash equivalents. The Company maintains cash and cash equivalent balances with financial institutions in the United States in excess of amounts insured by the Federal Deposit Insurance Corporation.

Fair Value Instruments

The carrying amount of the Company's cash and cash equivalents, accounts receivable, accounts payable and long-term debt approximates fair value due to the short-term nature or market interest rates of these items. The Company bases the fair value of short-term investments on quoted market prices or other relevant information generated by market transactions involving identical or comparable assets. The Company measures and records derivative financial instruments at fair value. See Note 5 for further discussion of financial instruments that are carried at fair value on a recurring and nonrecurring basis.

Accounts Receivable

Accounts receivable, principally trade receivables, are generally due within 30 to 90 days and are stated at amounts due from customers, net of an allowance for estimated sales returns and doubtful accounts. The Company performs ongoing credit evaluations of customers and adjusts credit limits based upon payment history and the customer’s current creditworthiness, as determined by a review of their current credit information. The Company continuously monitors aging reports, collections and payments from customers, and a provision for estimated credit losses is maintained based upon historical experience and any specific customer collection issues that have been identified. While such credit losses have historically been within expectations

57

and the provisions established, the Company cannot guarantee that the same credit loss rates will be experienced in the future. The Company writes off accounts receivable when they are determined to be uncollectible.

Inventories

Inventories are stated at the lower of cost or net realizable value based on the first-in, first-out cost method and consist of raw materials, work in process and finished goods. The standard cost of finished goods and work-in-process inventory is composed of material, labor and manufacturing overhead, which approximates actual cost. In addition to stating inventory at the lower of cost or net realizable value, we also evaluate inventory each reporting period for excess quantities and obsolescence, establishing reserves when necessary based upon historical experience, assessment of economic conditions and expected demand. Once recorded, these reserves are considered permanent adjustments to the carrying value of inventory An increase to inventory reserves results in a corresponding increase in cost of revenue. Inventories are written off against the reserve when they are physically disposed.

Property, Plant and Equipment

Property, plant and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Placement and evaluation units represent capital equipment placed at customer locations under placement or evaluation agreements for which depreciation expense is included in cost of sales on the Consolidation Statements of Operations. Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	3 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

The Company evaluates property, plant and equipment for impairment periodically to determine if changes in circumstances or the occurrence of events suggest the carrying value of the asset or asset group may not be recoverable. Expenditures for repairs and maintenance are charged to expense as incurred. Renewals and betterments are capitalized.

Goodwill and Intangible Assets

Intangible assets other than goodwill, indefinite lived intangible assets and in process research and development ("IP R&D") are amortized over their estimated useful lives, which range between two to eighteen years, on either a straight-line basis over the expected period of benefit or as revenue is earned from the sales of the related product. The Company periodically reviews the estimated useful lives of intangible assets and reviews such assets or asset groups for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Such conditions could include significant adverse changes in the business climate, current-period operating or cash flow losses, significant declines in forecasted operations, or a current expectation that an asset group will be disposed of before the end of its useful life. When testing for impairment of definite-lived intangible assets held for use, the Company groups assets at the lowest level for which cash flows are separately identifiable. The Company operates as a single asset group. If a triggering event is deemed to exist, the Company performs an undiscounted operating cash flow analysis to determine if an impairment exists. If an intangible asset is considered to be impaired, the amount of the impairment will equal the excess of the carrying value over the fair value of the asset.

Goodwill and other intangible assets that have indefinite useful lives are not amortized, but rather, are tested for impairment annually or more frequently if impairment indicators arise. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination. Goodwill and intangible assets have been recorded at either incurred or allocated cost. Allocated costs were based on respective fair market values at the date of acquisition.

For goodwill, the impairment test requires a comparison of the estimated fair value of the reporting unit to which the goodwill is assigned to the carrying value of the assets and liabilities of that reporting unit. The determination of reporting units also requires management judgment. The Company considers whether a reporting unit exists within a reportable segment based on the availability of discrete financial information. The Company operates as a single operating segment with one reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. If the carrying value of the reporting unit exceeds the fair value of the reporting unit, the carrying value is reduced to its fair value through an adjustment to the goodwill balance, resulting in an impairment charge.

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Contingent Consideration

The fair value of the liability for contingent consideration recorded on the acquisition date for a business combination is based on probability weighted estimated cash flow streams, discounted back to present value using a discount rate determined in accordance with accepted valuation methods and reflective of the risk associated with the estimated cash flow streams. The liability for contingent consideration is remeasured to fair value at each reporting period with changes recorded in earnings until the contingency is resolved.

Revenue Recognition

The Company recognizes revenue when it transfers control of promised goods or services to its customers in an amount that reflects the consideration to which the Company expects to be entitled to in exchange for those goods and services. See Note 4, “Revenue from Contracts with Customers” for further discussion on revenue.

Research and Development

Research and development costs, including salaries, consulting fees, building costs, utilities and administrative expenses that are related to developing new products, enhancing existing products, validating new and enhanced products, managing clinical, regulatory and medical affairs are expensed as incurred.

Income Taxes

The Company calculates income tax expense for each jurisdiction in which it operates. This involves estimating actual current taxes due plus assessing temporary differences arising from differing treatment for tax and accounting purposes that are recorded as deferred tax assets and liabilities. The Company periodically evaluates deferred tax assets, capital loss carryforwards and tax credit carryforwards to determine their recoverability based primarily on the Company's ability to generate future taxable income and capital gains. Where it is more-likely-than-not these will not be recovered, the Company estimates a valuation allowance and records a corresponding additional tax expense in the consolidated statement of operations.

The Company recognizes and measures uncertain tax positions taken or expected to be taken in a tax return utilizing a two-step approach. The Company first determines if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is that the Company measures the tax benefit as the largest amount that is more likely than not to be realized upon ultimate settlement. The Company recognizes interest and penalties related to uncertain tax positions in the provision for income taxes on the consolidated statements of operations.

Stock-Based Compensation

Stock-based compensation expense reflects the fair value of stock-based awards measured at the grant date and recognized over the relevant service period. The expense recognized includes the impact of forfeitures as they occur. The Company estimates the fair value of each stock-based award on the measurement date using either the current market price of the stock, the Black-Scholes option valuation model, or the Monte Carlo Simulation valuation model. The Black-Scholes and Monte Carlo Simulation valuation models incorporate assumptions as to stock price volatility, the expected life of options or restricted stock units, a risk-free interest rate and dividend yield. The Company recognizes stock-based compensation expense related to options, restricted stock units and market based performance stock units on a straight-line basis over the service period of the award, which is generally 4 years for options and restricted stock units and 3 years for market based performance stock units.

Foreign Currency Translation

The functional currency of the Company's foreign subsidiaries is the local currency in which the subsidiary operates. For foreign operations where the local currency is considered to be the functional currency, the Company translates assets and liabilities into U.S. dollars at the exchange rate on the balance sheet date. The Company translates income and expense items at average rates of exchange prevailing during each period. The Company accumulates translation adjustments in accumulated other comprehensive loss, a component of stockholders’ equity.

Transaction gains or losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other expense in the statements of operations as incurred.

Derivative Financial Instruments

The Company is exposed to market risks, including changes in foreign currency and interest rates. The Company periodically enters into certain derivative financial instruments to hedge the underlying economic exposure.

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Derivative instruments are presented in the consolidated financial statements at their fair value. Changes in the fair value of derivative financial instruments are either recognized periodically in income or in stockholders’ equity as a component of accumulated other comprehensive income (loss) depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value or cash flow hedge. Generally, the changes in the fair value of derivatives accounted for as fair value hedges are recorded in income along with the portions of the changes in the fair value of hedged items that relate to the hedged risks. Changes in the fair value of derivatives accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in accumulated other comprehensive income (loss). There were no derivative instruments held by the Company as of May 31, 2021 and 2020.

Contingencies

The Company is subject to various legal proceedings that arise in the ordinary course of business, including patent infringement and product liability matters. The Company records accruals for contingencies when it is probable the liability has been incurred and the amount can be reasonably estimated. Legal fees are expensed as incurred. Insurance recoveries related to potential claims are recognized up to the amount of the recorded liability when coverage is confirmed and the estimated recoveries are probable of payment. These recoveries are not netted against the related liabilities for financial statement presentation.

Recently Issued Accounting Pronouncements

The following table provides a description of recent accounting pronouncements that may have a material effect on the Company's consolidated financial statements:

Recently Issued Accounting Pronouncements - Adopted
Standard	Description	Date Adopted	Effect on the Consolidated Financial Statements
ASU 2018-13, Fair Value Measurement (Topic 820)	This ASU removes, modifies and adds various disclosure requirements related to fair value disclosures. Disclosures related to transfers between fair value hierarchy levels will be removed and further detail around changes in unrealized gains and losses for the period and unobservable inputs used in determining level 3 fair value measurements will be added, among other changes.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.

Recently Issued Accounting Pronouncements - Not Yet Applicable or Adopted

There are no new accounting pronouncements issued that are expected to have a material impact on our consolidated financial statements.

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2. ACQUISITIONS

C3 Wave Tip Location Acquisition

On December 17, 2019, the Company acquired the C3 Wave tip location asset from Medical Components Inc.("MedComp") for an aggregate purchase price of $10.0 million with $5.0 million of potential future contingent consideration related to technical milestones. This acquisition filled a gap in the Vascular Access portfolio and supports the Company's strategic plan. The Company accounted for this acquisition as an asset purchase. The Company recorded the amount paid at closing as inventory of $0.6 million and intangible assets of a trademark of $0.9 million and product technology of $8.5 million. The intangible assets will be amortized over 15 years. The contingent consideration is comprised of technical milestones and will be accounted for when the contingency is resolved or becomes probable and reasonably estimable.

Eximo Acquisition

On October 2, 2019, the Company entered into a share purchase agreement to acquire Eximo Medical, Ltd., a pre-commercial stage medical device company with a proprietary 355nm laser atherectomy technology. The aggregate purchase price of $60.7 million included an upfront payment of $45.8 million and contingent consideration with an estimated fair value of $14.9 million. This acquisition expanded and complemented the Company’s Endovascular Therapies product portfolio by adding the 355nm laser atherectomy technology (Auryon) which treats Peripheral Artery Disease.

The Company accounted for the Eximo acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is non-deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of Eximo products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the Eximo acquisition, which are included in "acquisition, restructuring and other items, net" in the accompanying Consolidated Statements of Operations, were approximately $0.6 million in fiscal year 2020. The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	50
Inventory	150
Prepaid and other current assets	54
Long-term deposits	51
Property, plant and equipment	397
Intangible assets:
Product technology	60,300
Goodwill	11,427
Total assets acquired	$	72,429
Liabilities assumed
Accounts payable	$	84
Other current liabilities	615
Deferred tax liabilities	11,070
Total liabilities assumed	$	11,769
Net assets acquired	$	60,660

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2020.

The value assigned to the product technology was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. The product technology is deemed to have a useful life of fifteen years and will be amortized on a straight-line basis over the useful life.

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The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

RadiaDyne Acquisition

On September 21, 2018, the Company acquired RadiaDyne, a privately held medical diagnostic and device company that designs and develops patient dose monitoring technology to improve cancer treatment outcomes. The aggregate purchase price of $75.0 million included an upfront payment of $47.9 million, contingent consideration with an estimated fair value of $22.3 million, an indemnification holdback of $4.6 million and a purchase price holdback of $0.2 million. The fair value of contingent consideration of $22.3 million was comprised of $16.5 million for the revenue milestones and $5.8 million for the technical milestones. The indemnification holdback was recorded in accrued liabilities at May 31, 2020 and was released during fiscal year 2021.

This acquisition expanded the Company’s growing Oncology business by adding RadiaDyne’s oncology solutions, including the IsoLoc/ImmobiLoc and Alatus balloon stabilizing technologies.

The Company accounted for the RadiaDyne acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of RadiaDyne products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the RadiaDyne acquisition, which are included in "acquisition, restructuring and other items, net" in the accompanying Consolidated Statements of Operations, were approximately $1.6 million in fiscal year 2019. The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	900
Inventory	732
Prepaid and other current assets	98
Property, plant and equipment	133
Intangible assets:
RadiaDyne trademark	400
OARtrac trademark	200
RadiaDyne legacy product technology	1,500
OARtrac product technology	18,900
RadiaDyne customer relationships	4,600
Goodwill	47,982
Total assets acquired	$	75,445
Liabilities assumed
Accounts payable	$	352
Accrued expenses	106
Total liabilities assumed	$	458
Net assets acquired	$	74,987

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2019.

The values assigned to the RadiaDyne and OARtrac trademark and product technologies were derived using the relief-from-royalties method under the income approach. This approach is used to estimate the cost savings that accrue for the owner of an intangible asset who would otherwise have to pay royalties or licensing fees on revenues earned through the use of the asset if they had not owned the rights to use the assets. The net after-tax royalty savings are calculated for each year in the remaining economic life of the intangible asset and discounted to present value. The trademarks were deemed to have a useful life of five to seven years and the product technologies were deemed to have a useful life of seven to ten years. Both are amortized on a straight-line basis over their useful life.

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The value assigned to customer relationships was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. Customer relationships are amortized on a straight-line basis over fifteen years.

The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The impairment charge is recorded in "Acquisition, restructuring and other items, net", on the Consolidated Statement of Operations (see Note 19). At May 31, 2021, the fair value of the contingent liability for RadiaDyne is zero (see Note 5).

BioSentry Acquisition

On August 14, 2018, the Company acquired the BioSentry product from Surgical Specialties, LLC (“SSC”), for an aggregate purchase price of $39.8 million of which $37.0 million was paid on August 14, 2018 and $2.8 million was recorded as contingent consideration. The contingent consideration liability was recorded at fair value and was paid in the fourth quarter of fiscal year 2019 upon fulfillment of hydrogel orders by SSC.

The Company accounted for the BioSentry acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of BioSentry products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the BioSentry acquisition, which are included in acquisition, restructuring and other expenses, net in the accompanying Consolidated Statements of Operations, were approximately $1.0 million in fiscal year 2019. The following table summarizes the final purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Inventory	$	50
Property, plant and equipment	10
Intangible assets:
BioSentry trademark	2,500
BioSentry product technology	20,900
Customer relationships	2,600
Goodwill	13,740
Net assets acquired	$	39,800

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2019.

The values assigned to the BioSentry trademark and product technologies were derived using the relief-from-royalties method under the income approach. This approach is used to estimate the cost savings that accrue for the owner of an intangible asset who would otherwise have to pay royalties or licensing fees on revenues earned through the use of the asset if they had not owned the rights to use the assets. The net after-tax royalty savings are calculated for each year in the remaining economic life of the intangible asset and discounted to present value. The trademark and product technologies are deemed to have a fifteen year useful life and are amortized on a straight-line basis over their useful life.

The value assigned to customer relationships was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. Customer relationships are amortized on a straight-line basis over ten years.

The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

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3. DIVESTITURES    

Fluid Management

On May 31, 2019, the Company completed the sale of the NAMIC Fluid Management business (the “Divestiture”) and all of the assets used primarily in connection with the Fluid Management business to Medline Industries, Inc. (“Medline”) pursuant to an asset purchase agreement dated April 17, 2019 (the “Asset Purchase Agreement”). Total consideration received by the Company for the Divestiture in the fourth quarter of fiscal year 2019 was $169.2 million in cash and resulted in a gain of $46.6 million after working capital adjustments of $0.6 million. The gain is recorded in discontinued operations. On June 3, 2019, a portion of the net proceeds were used to retire the outstanding balance on the Term Loan and Revolving Facility and the remaining net proceeds will continue to be invested in the business.

Pursuant to a transition services agreement entered into and effective on the closing of the transaction, the Company supplied certain services to Medline. Medline received certain legal, human resource, tax, accounting and information technology services from the Company which ended in the fourth quarter of fiscal year 2021.

As a result of the Divestiture, the results of operations from the Fluid Management business are reported in the accompanying consolidated statements of operations as “Income from discontinued operations, net of income tax” for the year ended May 31, 2019.

The following table summarizes the financial results of discontinued operations:

(in thousands)	May 31, 2019
Net sales	$	88,850
Cost of sales (exclusive of amortization)	52,978
Gross profit	35,872
Operating expenses
Research and development	1,177
Sales and marketing	4,129
General and administrative	271
Amortization of intangibles	2,716
Total operating expenses	8,293
Operating income	27,579
Gain on divestiture	46,592
Income from discontinued operations before income taxes	74,171
Income tax expense	(1,685)
Income from discontinued operations	$	72,486

In accordance with GAAP, only expenses specifically identifiable and related to a business to be disposed may be allocated to discontinued operations. As such, the selling and marketing, research and development and general and administrative expenses recorded in discontinued operations include corporate costs incurred directly in support of the Fluid Management portfolio.

The Company applied the “Intraperiod Tax Allocation” rules under ASC 740, which requires the allocation of an entity’s total annual income tax provision among continuing operations and, in the Company’s case, discontinued operations. Included in the $1.6 million income tax expense for fiscal year 2019 is $0.6 million tax expense related to the gain on the Divestiture. The taxes on the gain were calculated using various state statutory tax rates and are partially offset by the utilization of historical state net operating losses. There are no current federal taxes on the gain due to utilization of historical net operating losses which had a corresponding valuation allowance.

The table below provides a reconciliation of the gain recorded on the sale of the Fluid Management business:

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(in thousands)
Proceeds received from Divestiture	$	169,242
Working capital adjustment	(612)
Fluid Management assets:
Inventories	11,029
Property, plant and equipment, net	16,624
Intangible assets, net	15,047
Goodwill	75,308
Total Fluid Management assets	118,008
Transaction costs for Divestiture (1)	4,030
Gain on sale of the Fluid Management business before income taxes	$	46,592

(1) Costs include advisory fees, legal fees and professional fees

Proceeds from the sale of Fluid Management have been presented in the Consolidated Statements of Cash Flows under investing activities for the fiscal year ended May 31, 2019.  Total operating and investing cash flows of discontinued operations for the fiscal year ended May 31, 2019 is comprised of the following, which exclude the effect of income taxes:

(in thousands)	2019
Net cash provided by operating activities	$	2,245
Net cash provided by investing activities	982

4. REVENUE FROM CONTRACTS WITH CUSTOMERS

Revenue Recognition

Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company has one primary revenue stream which is the sales of its products.

Disaggregation of Revenue

The following tables summarize net product revenue by Global Business Unit and geography for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31, 2021						Year ended May 31, 2020
(in thousands)	United States		International		Total		United States		International		Total
Net sales
Endovascular Therapies	$	121,427	$	13,652	$	135,079	$	98,965	$	13,741	$	112,706
Vascular Access	81,088		20,222		101,310		76,768		17,531		94,299
Oncology	34,528		20,093		54,621		32,247		24,905		57,152
Total	$	237,043	$	53,967	$	291,010	$	207,980	$	56,177	$	264,157

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	Year ended May 31, 2019
(in thousands)	United States		International		Total
Net sales
Endovascular Therapies	$	106,767	$	13,134	$	119,901
Vascular Access	79,611		15,119		94,730
Oncology	30,579		25,424		56,003
Total	$	216,957	$	53,677	$	270,634

Net Product Revenue

The Company's products consist of a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and for use in oncology and surgical settings. The Company's devices are generally used in minimally invasive, image-guided procedures. Most of the Company's products are intended to be used once and then discarded, or they may be implanted for short or long term use. The Company sells its products to its distributors and to end users, such as interventional radiologists, interventional cardiologists, vascular surgeons, urologists, interventional and surgical oncologists and critical care nurses.

Contracts and Performance Obligations

The Company contracts with its customers based on customer purchase orders, which in many cases are governed by master purchasing agreements. The Company’s contracts with customers are generally for product only, and do not include other performance obligations such as services or other material rights. As part of its assessment of each contract, the Company evaluates certain factors including the customer’s ability to pay (or credit risk). For each contract, the Company considers the promise to transfer products, each of which is distinct, to be the identified performance obligations.

Transaction Price and Allocation to Performance Obligations

Transaction prices of products are typically based on contracted rates. Product revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products to a customer, net of any variable consideration as described below.

If a contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the estimated relative standalone selling prices of the promised products underlying each performance obligation. The Company has standard pricing for its products and determines standalone selling prices based on the price at which the performance obligation is sold separately.

Revenue Recognition

Revenue is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which occurs at a point in time, and may be upon shipment from the Company’s manufacturing site or delivery to the customer’s named location, based on the contractual shipping terms of a contract.

In determining whether control has transferred, the Company considers if there is a present right to payment from the customer and when physical possession, legal title and risks and rewards of ownership have transferred to the customer.

The Company typically invoices customers upon satisfaction of identified performance obligations. As the Company’s standard payment terms are 30 to 90 days from invoicing, the Company does not provide any significant financing to its customers.

The Company enters into agreements to place placement and evaluation units (“units”) at customer sites, but the Company retains title to the units. The duration of these agreements are typically a year and the customer has the right to use the unit at no upfront charge in connection with the customer’s ongoing purchase of disposables. These types of agreements include an embedded operating lease for the right to use the units. In these arrangements, revenue recognized for the sale of the disposables is not allocated between the disposal revenue and lease revenue due to the insignificant value of the units in relation to the total agreement value.

Sales, value added, and other taxes collected on behalf of third parties are excluded from revenue.

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Variable Consideration

Reserves: Revenue from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established for discounts, returns, rebates and allowances that are offered within contracts between the Company and its customers. These reserves are based on the amounts earned or to be claimed on the related sales and are classified as a contra asset.

Rebates and Allowances: The Company provides certain customers with rebates and allowances that are explicitly stated in the Company’s contracts and are recorded as a reduction of revenue in the period the related product revenue is recognized. The Company establishes reserves for such amounts, which is included in accrued expenses in the accompanying consolidated balance sheets. These rebates and allowances result from performance-based offers that are primarily based on attaining contractually specified sales volumes and administrative fees the Company is required to pay to group purchasing organizations.

Product Returns: The Company generally offers customers a limited right of return. Product returns after 30 days must be pre-approved by the Company and customers may be subject to a 20% restocking charge. To be accepted, a returned product must be unadulterated, undamaged and have at least twelve months remaining prior to its expiration date. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The Company currently estimates product return liabilities using its historical product return information and considers other factors that it believes could significantly impact its expected returns, including product recalls. During the year ended May 31, 2021, such product returns were not material.

Contract Balances with Customers

A receivable is generally recognized in the period the Company ships the product. Payment terms on invoiced amounts are based on contractual terms with each customer and generally coincide with revenue recognition. Accordingly, the Company does not have any contract assets associated with the future right to invoice its customers. In some cases, if control of the product has not yet transferred to the customer or the timing of the payments made by the customer precedes the Company’s fulfillment of the performance obligation, the Company recognizes a contract liability that is included in deferred revenue in the accompanying consolidated balance sheets.

The following table presents changes in the Company’s receivables, contract assets and contract liabilities with customers:

(in thousands)	May 31, 2021		May 31, 2020
Receivables	$	35,405	$	31,263
Contract assets	$	—	$	—
Contract liabilities	$	426	$	545

During the years ended May 31, 2021 and 2020, the Company had additions to contract liabilities of $1.0 million and $2.1 million, respectively. This was offset by $1.2 million and $2.2 million in revenue that was recognized during the years ended May 31, 2021 and 2020, respectively.

Costs to Obtain or Fulfill a Customer Contract

Under ASC 606, the Company recognizes an asset for incremental costs of obtaining a contract with a customer if it expects to recover those costs. The Company’s sales incentive compensation plans qualify for capitalization since these plans are directly related to sales achieved during a period of time. However, the Company has elected the practical expedient under ASC 340-40-25-4 to expense the costs as they are incurred within selling and marketing expenses since the amortization period is less than one year.

The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill the promise to transfer the associated products. Shipping and handling costs, associated with the distribution of finished products to customers, are recorded in costs of goods sold and are recognized when the related finished product is shipped to the customer. Amounts charged to customers for shipping are recorded in net sales.

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

On a recurring basis, the Company measures certain financial assets and financial liabilities at fair value based upon quoted market prices, where available. Where quoted market prices or other observable inputs are not available, the Company applies valuation techniques to estimate fair value. FASB ASC Topic 820, Fair Value Measurements and Disclosures, establishes a three-level valuation hierarchy for disclosure of fair value measurements. The categorization of financial assets

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and financial liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the measurement of fair value. The three levels of the hierarchy are defined as follows:

•Level 1 - Inputs to the valuation methodology are quoted market prices for identical assets or liabilities.

•Level 2 - Inputs to the valuation methodology are other observable inputs, including quoted market prices for similar assets or liabilities and market-corroborated inputs.

•Level 3 - Inputs to the valuation methodology are unobservable inputs based on management’s best estimate of inputs market participants would use in pricing the asset or liability at the measurement date, including assumptions about risk.

The Company's financial instruments include cash and cash equivalents, marketable securities, accounts receivable, accounts payable and contingent consideration. The carrying amount of cash and cash equivalents, accounts receivable, and accounts payable approximates fair value due to their immediate or short-term maturities. The recurring fair value measurements using significant unobservable inputs (Level 3) relate to contingent consideration liabilities.

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis:

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2021
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,741	$	15,741
Total Financial Liabilities	$	—	$	—	$	15,741	$	15,741

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2020
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,647	$	15,647
Total Financial Liabilities	$	—	$	—	$	15,647	$	15,647

There were no transfers in and out of Level 1, 2 and 3 measurements for the years ended May 31, 2021 and 2020.

The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2021:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2020	$	15,647
Change in present value of contingent consideration (1)	89
Currency (gain) loss from remeasurement	5
Balance at May 31, 2021	$	15,741

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

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The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2020:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2019	$	13,486
Contingent consideration liabilities recorded as a result of the acquisitions (Note 2)	14,900
Change in fair value of contingent consideration (1)	(11,531)
Contingent consideration payments	(1,208)
Balance at May 31, 2020	$	15,647

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

During fiscal year 2020, the Company revised the sales projections for RadiaDyne products as a result of reviews performed by executive management. The adjustments to the sales projections over the contractual earn-out period resulted in a $9.2 million reduction in the fair value of the contingent liability. It was also determined that one of the technical milestones would not be achieved, which resulted in an additional reduction in the liability of $2.7 million. At May 31, 2021, there are no remaining amounts payable for the RadiaDyne contingent consideration.

Contingent Liability for Acquisition Earn Outs

Some of the Company's business combinations involve the potential for the payment of future contingent consideration upon the achievement of certain product development milestones or various other performance conditions. Payment of the additional consideration is generally contingent on the acquired company reaching certain performance milestones, including attaining specified revenue levels or product development targets. Contingent consideration is recorded at the estimated fair value of the contingent payments on the acquisition date. The fair value of the contingent consideration is remeasured at the estimated fair value at each reporting period with the change in fair value recognized as income or expense within change in fair value of contingent consideration in the consolidated statements of income.

The Company measures the initial liability and remeasures the liability on a recurring basis using Level 3 inputs as defined under authoritative guidance for fair value measurements which is determined using a discounted cash flow model applied to projected net sales, using probabilities of achieving projected net sales and projected payment dates. Projected net sales are based on internal projections and extensive analysis of the target market and the sales potential. Increases or decreases in any valuation inputs in isolation may result in a significantly lower or higher fair value measurement in the future.

The recurring Level 3 fair value measurements of the contingent consideration liabilities include the following significant unobservable inputs as of May 31, 2021:

(in thousands)	Fair Value		Valuation Technique	Unobservable Input	Range
Revenue based payments	$	15,741	Discounted cash flow	Discount rate	5%
				Probability of payment	66% - 100%
				Projected fiscal year of payment	2024 - 2025

At May 31, 2021, the amount of undiscounted future contingent consideration that the Company expects to pay as a result of all completed acquisitions is approximately $20.0 million. The milestones, including revenue projections and technical milestones, associated with the contingent consideration must be reached in future periods ranging from fiscal years 2021 to 2025 in order for the associated consideration to be paid.

Items Measured at Fair Value on a Nonrecurring Basis

During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The Company recorded a goodwill impairment charge of $158.6 million as of May 31, 2020 to write down the carrying value of the reporting unit to fair value using Level 3 inputs.

There were no other items measured at fair value on a nonrecurring basis during the year ended May 31, 2020 or May 31, 2021.

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6. INVENTORIES

Inventories are stated at lower of cost and net realizable value (using the first-in, first-out method). Inventories consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Raw materials	$	22,925	$	23,308
Work in process	8,022		8,318
Finished goods	17,667		28,279
Total	$	48,614	$	59,905

The Company periodically reviews its inventory for both obsolescence and loss of value. The Company makes assumptions about the future demand for and market value of the inventory. Based on these assumptions, the Company estimates the amount of obsolete, expiring and slow moving inventory. The total inventory reserve at May 31, 2021 and 2020 was $3.8 million and $4.7 million, respectively.

7. PREPAID EXPENSES AND OTHER

Prepaid expenses and other consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Deposits	$	2,795	$	689
Employee Retention Tax Credit	1,911		—
Software licenses	1,286		1,002
TSA receivable	2		2,911
License fees	166		203
Trade shows	132		296
Rent	268		246
Other prepaid taxes	379		414
Other	1,760		1,549
Total	$	8,699	$	7,310

8. PROPERTY, PLANT AND EQUIPMENT, NET

Property, plant and equipment are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Building and building improvements	$	28,979	$	27,119
Computer software and equipment	26,302		24,730
Machinery and equipment	14,208		13,602
Placement and evaluation units	9,530		—
Construction in progress	3,217		3,050
	82,236		68,501
Less accumulated depreciation	(45,635)		(40,661)
	36,601		27,840
Land and land improvements	472		472
	$	37,073	$	28,312

Depreciation expense for fiscal years 2021, 2020 and 2019 was $5.7 million, $3.3 million and $3.1 million, respectively.

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9. GOODWILL AND INTANGIBLE ASSETS

Goodwill

Goodwill is not amortized, but rather, is tested for impairment annually or more frequently if impairment indicators arise. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination.

The Company's annual testing for impairment of goodwill was completed as of December 31, 2020. The Company operates as a single operating segment with one reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. The Company determines the fair value of the reporting unit based on the market valuation approach and concluded that it was not more-likely-than-not that the fair value of the Company's reporting unit was less than its carrying value.

Even though the Company determined that there was no goodwill impairment as of December 31, 2020, the future occurrence of a potential indicator of impairment, such as a significant adverse change in legal, regulatory, business or economic conditions or a more-likely-than-not expectation that the reporting unit or a significant portion of the reporting unit will be sold or disposed of, would require an interim assessment for the reporting unit prior to the next required annual assessment as of December 31, 2021.

There were no adjustments to goodwill for the year ended May 31, 2021 other than foreign currency translation adjustments. For the year ended May 31, 2020 the Company recorded a goodwill impairment charge of $158.6 million to write down the carrying value of the reporting unit to fair value.

Definite Lived Intangible Assets

Definite lived intangible assets consist primarily of product technologies and customer relationships and are amortized over their estimated useful lives, which range between two to eighteen years, on either a straight-line basis over the expected period of benefit or as revenues are earned from the sales of the related product. Amortization expense was $18.1 million, $18.1 million and $17.1 million for fiscal years 2021, 2020 and 2019, respectively. During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The impairment charge is recorded in "Acquisition, restructuring and other items, net", on the Consolidated Statement of Operations (see Note 19). There were no impairment charges on definite lived intangible assets for the years ended May 31, 2020 and 2019.

Intangible assets consisted of the following:

	May 31, 2021
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	236,907	$	(97,343)	$	139,564
Customer relationships	60,291		(34,164)		26,127
Trademarks	9,950		(6,905)		3,045
Licenses	6,087		(5,846)		241
	$	313,235	$	(144,258)	$	168,977

	May 31, 2020
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	251,569	$	(88,547)	$	163,022
Customer relationships	60,160		(30,018)		30,142
Trademarks	10,150		(6,691)		3,459
Licenses	6,087		(5,574)		513
	$	327,966	$	(130,830)	$	197,136

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Expected future amortization expense related to the intangible assets for each of the following fiscal years is as follows:

(in thousands)
2022	$	15,156
2023	15,595
2024	14,111
2025	15,131
2024	16,138
2025 and thereafter	92,846
	$	168,977

10. INCOME TAXES

The components of loss from continuing operations before income tax benefit are as follows:

	Year ended May 31,
(in thousands)	2021		2020		2019
Loss from continuing operations before tax expense:
U.S.	$	(31,595)	$	(166,984)	$	(15,593)
Non-U.S.	(4,457)		(1,151)		891
	$	(36,052)	$	(168,135)	$	(14,702)

Income tax benefit is comprised of the following:

	Year ended May 31,
(in thousands)	2021		2020		2019
Current
U.S.	100		96		128
Non U.S.	201		124		289
	301		220		417
Deferred
U.S.	(3,375)		(1,122)		(3,948)
Non U.S.	(1,430)		(446)		(25)
	(4,805)		(1,568)		(3,973)
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

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Temporary differences that give rise to deferred tax assets and liabilities are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Deferred tax assets
Net operating loss carryforward	$	31,564	$	26,697
Stock-based compensation	3,556		2,923
Federal and state R&D tax credit carryforward	6,715		5,412
Inventories	884		1,071
Expenses incurred not currently deductible	3,091		1,927
Accrued liabilities	73		95
Gross deferred tax asset	45,883		38,125
Deferred tax liabilities
Depreciation and amortization	48,744		49,023
	48,744		49,023
Valuation allowance	(17,035)		(13,114)
Net deferred tax liability	$	(19,896)	$	(24,012)

The net deferred tax liability in the U.S. as of May 31, 2021 and 2020 principally relates to tax amortization of intangibles that have an indefinite reversal period for book purposes, also known as a “naked credit deferred tax liability”, that cannot be considered as a source of income to recover the deferred tax asset. In addition, during the fiscal year ended May 31, 2020 a net deferred tax liability of $11.0 million was recorded in purchase accounting related to the stock acquisition of Eximo Medical Ltd. primarily related to book intangibles offset by tax net operating losses.

The Company's U.S. Federal net operating loss carryforwards as of May 31, 2021 after considering IRC Section 382 limitations are $134.6 million. The expiration of the Federal net operating loss carryforwards are as follows: $8.6 million between 2022 and 2023, $79.4 million between 2028 and 2037 and $46.6 million indefinitely.

The Company's state net operating loss carryforwards as of May 31, 2021 after considering remaining IRC Section 382 limitations are $20.0 million which expire in various years from 2029 to 2041. The Company has Israel tax net operating losses of $13.5 million that can be carried forward indefinitely.

Beginning in 2018, except for the Global Intangible Low-Taxed Income, the Company will no longer record United States federal income tax on its share of the income of its foreign subsidiaries, nor will it record a benefit for foreign tax credits related to that income. Upon distribution of these earnings in the form of dividends or otherwise, the Company would be subject to withholding taxes payable, where applicable, to foreign countries, but would have no further federal income tax liability. The Company intends to indefinitely reinvest the unremitted foreign earnings of all other subsidiaries as of May 31, 2021, as well as all subsequent earnings generated by all of our foreign subsidiaries. Determining the amount of unrecognized deferred tax liability related to any additional outside basis difference in these entities is not practical.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Evidence the Company considered included its history of net operating losses, which resulted in the Company recording a full valuation allowance for its deferred tax assets in fiscal year 2016, except the naked credit deferred tax liability.

Based on the review of all available evidence, the Company determined that it has not yet attained a sustained level of profitability and the objectively verifiable negative evidence outweighed the positive evidence. Therefore, the Company has provided a valuation allowance on its federal and state net operating loss carryforwards, federal and state R&D credit carryforwards and other net deferred tax assets that have a limited life and are not supportable by the naked credit deferred tax liability sourced income as of May 31, 2021. The Company will continue to assess the level of the valuation allowance required. If sufficient positive evidence exists in future periods to support a release of some or all of the valuation allowance, such a release would likely have a material impact on the Company’s results of operations.

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The Company's consolidated income tax expense has differed from the amount that would be provided by applying the U.S. Federal statutory income tax rate to the Company's income before income taxes for the following reasons:

	Year ended May 31,
(in thousands)	2021		2020		2019
Income tax benefit at federal statutory tax rate of 21.0%, 21.0% and 28.6%, respectively	$	(7,571)	$	(35,308)	$	(3,087)
State income taxes, net of Federal tax benefit	(462)		(40)		(177)
Impact of Non-U.S. operations	(293)		(100)		76
Research and development tax credit	(1,303)		(1,152)		(936)
Meals and entertainment	116		171		190
Goodwill impairment	—		33,301		—
Change in valuation allowance	3,921		1,426		175
Effect of elimination of stock compensation APIC pool	526		162		—
Other	562		192		203
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

During fiscal year 2020, the Company recorded a goodwill impairment of $158.6 million. The Company has made the tax accounting policy election to first allocate the impairment to the Company’s nondeductible goodwill based on the Company’s pre-impairment nondeductible goodwill balance.

The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits:

	Year ended May 31,
(in thousands)	2021		2020		2019
Unrecognized tax benefits balance at June 1	$	464	$	464	$	464
Decrease in gross amounts of tax positions related to prior years due to U.S. tax reform	—		—		—
Decrease due to lapse in statute of limitations	—		—		—
Unrecognized tax benefits balance at May 31	$	464	$	464	$	464

The table above includes unrecognized tax benefits associated with the calculation of limitations placed on the utilization of tax attributes related to an acquired company. If recognized, $0.5 million would result in adjustments to other tax accounts.  

The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. There are no accrued interest and penalties recognized in the consolidated balance sheet as of May 31, 2021 and May 31, 2020.

The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to examination by taxing authorities throughout the world. Fiscal years 2018 through 2020 remain open to examination by the various tax authorities.

The Company does not anticipate that the amount of unrecognized tax benefits will significantly change in the next twelve months.

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11. ACCRUED LIABILITIES

Accrued liabilities consist of the following:

(in thousands)	May 31, 2021		May 31, 2020
Payroll and related expenses	$	20,408	$	13,059
Outside services	4,256		2,222
Royalties	2,663		2,392
Accrued severance	548		794
Sales and franchise taxes	631		634
Litigation matters	975		—
Indemnification holdback	—		5,000
Other	5,978		5,279
Total	$	35,459	$	29,380

12. LONG-TERM DEBT

On June 3, 2019 and in connection with the completion of the Fluid Management divestiture, the Company repaid all amounts outstanding under its existing Credit Agreement and entered into a new Credit Agreement with the lenders party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and Bank of America, N.A. and KeyBank National Association, as co-syndication agents.

The Credit Agreement provides for a $125.0 million secured revolving credit facility (the “Revolving Facility”), which includes an uncommitted expansion feature that allows the Company to increase the total revolving commitments and/or add new tranches of term loans in an aggregate amount not to exceed $75.0 million.  The proceeds may be used to refinance certain existing indebtedness of the Company and its subsidiaries, to finance the working capital needs, and for general corporate purposes (including permitted acquisitions), of the Company and its subsidiaries.

The Credit Agreement has a five year maturity. Interest on the facility is based, at the Company’s option, on either a base rate of LIBOR or alternate base rate, plus an applicable margin tied to the Company’s total leverage ratio and having ranges between 0.25% and 0.75% for base rate loans and between 1.25% and 1.75% for LIBOR loans. After default, the interest rate may be increased by 2.0%. The facility also carries a commitment fee of 0.20% to 0.25% per annum on the unused portion.

The Company's obligations under the Revolving Facility are unconditionally guaranteed, jointly and severally, by the Company's material direct and indirect domestic subsidiaries (the “Guarantors”). All obligations of the Company and the Guarantors under the Revolving Facility are secured by first priority security interests in substantially all of the assets of the Company and the Guarantors.

The Credit Agreement includes customary representations, warranties and covenants, and acceleration, indemnity and events of default provisions, including, among other things, two quarterly financial covenants as follows: 

•Maximum leverage ratio of consolidated total indebtedness* to consolidated EBITDA* of not greater than 3.00 to 1.00 (during certain periods following material acquisitions the ratio shall be increased to 3.50 to 1.00).

•Fixed charge coverage ratio of consolidated EBITDA minus consolidated capital expenditures* to consolidated interest expense* paid or payable in cash plus scheduled principal payments in respect of indebtedness under the Credit Agreement of not less than 1.25 to 1.00.

* The definitions of consolidated total indebtedness, consolidated EBITDA, consolidated capital expenditures and consolidated interest expense are specifically defined in the credit agreement included as an exhibit to Form 8-K filed on June 6, 2019.

As of May 31, 2021 there was $20.0 million outstanding on the Revolving Facility. As of May 31, 2021 and May 31, 2020, the carrying value of long-term debt approximated its fair market value.

The interest rate on the Revolving Facility at May 31, 2021 was 1.36%.

The Company was in compliance with the Credit Agreement covenants as of May 31, 2021.

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13. RETIREMENT PLANS

The Company has a 401(k) plan under which eligible employees can defer a portion of their compensation, part of which is matched by the Company. Matching contributions were $3.8 million, $3.2 million and $3.6 million in 2021, 2020 and 2019, respectively. There are also various immaterial foreign retirement plans.

14. STOCKHOLDERS’ EQUITY

Capitalization

On October 29, 2014, the Board of Directors approved the Amended and Restated Certificate of Incorporation (the “Amended Certificate”). Under the Amended Certificate, the authorized capital stock is 80,000,000 shares, consisting of 75,000,000 shares of common stock, par value $.01 per share and 5,000,000 shares of preferred stock, par value $.01 per share.

The holders of common stock are entitled to one vote for each share held. Subject to preferences applicable to any outstanding shares of preferred stock, the holders of common stock are entitled to receive ratably dividends, if any, as may be declared by the Board of Directors out of funds legally available for dividend payments. If the Company liquidates, dissolves, or winds up, the holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities and liquidation preferences of any outstanding shares of preferred stock. Holders of common stock have no pre-emptive rights or rights to convert their common stock into any other securities. There are no redemption or sinking fund provisions applicable to the common stock. The rights, preferences and privileges of the holders of common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of preferred stock that the Company may designate in the future.

The Board of Directors has the authority to (i) issue the undesignated preferred stock in one or more series, (ii) determine the powers, preferences and rights and the qualifications, limitations or restrictions granted to or imposed upon any wholly un-issued series of undesignated preferred stock and (iii) fix the number of shares constituting any series and the designation of the series, without any further vote or action by the Company's stockholders.

Stock Options

On October 13, 2020, the Company's shareholders approved the 2020 Stock and Incentive Award Plan (the “2020 Plan”). The 2020 Plan provides for the grant of incentive stock options, non-statutory stock options, restricted stock, restricted stock units, stock appreciation rights, performance share units, performance shares and other incentive awards to the Company's employees, directors and other service providers. A total of 2.4 million shares of common stock have been reserved for issuance under the 2020 Plan.

Prior to the adoption of the 2020 Plan, equity awards were issued under the 2004 Stock and Incentive Award Plan (the “2004 Plan”). The adoption of the 2020 Plan did not impact the administration of equity awards issued under the 2004 Plan but following the adoption of the 2020 Plan, equity award grants are no longer made under the 2004 Plan.

As of May 31, 2021, there remained approximately 2.3 million shares available for granting under the 2020 Plan.

The following table summarizes information about stock option activity for the fiscal year ended May 31, 2021:

	Shares	Weighted average exercise price		Weighted average remaining contractual life	Aggregate intrinsic value (in thousands)
Outstanding at beginning of year - June 1, 2020	1,938,753	$	16.89
Granted	528,809	$	11.41
Exercised	(137,237)	$	16.45
Forfeited	(132,895)	$	18.38
Expired	(50,470)	$	12.33
Outstanding at end of year - May 31, 2021	2,146,960	$	15.59	6.24	$	16,176
Options exercisable at year-end	1,067,686	$	16.26	3.91	$	7,324
Options expected to vest in future periods	1,079,274	$	14.92	8.53	$	8,852

Stock options are granted at exercise prices equal to the quoted market price of common stock at the date of the grant. Options vest 25% per year over four years for employees. Stock options granted prior to May 1, 2007 and after June 1, 2017 expire on the tenth anniversary of the grant date. Stock options granted between May 1, 2007 through May 31, 2017 expire on the seventh anniversary of the grant date.

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The Company measures the fair value of each stock option grant at the date of grant using a Black-Scholes option pricing model. The weighted average grant-date fair value of options granted during the years ended May 31, 2021, 2020 and 2019 was $3.97, $5.46, and $6.53, respectively. The following assumptions were used in arriving at the fair value of options granted during 2021, 2020 and 2019, respectively: risk-free interest rates of 0.34%, 1.63% and 2.78%; expected volatility of 39%, 31%, and 31%; and expected lives of 4.96 years, 4.91 years, and 4.79 years. The Company does not declare dividends therefore a dividend yield of zero was used for the years ended May 31, 2021, 2020 and 2019. Risk-free interest rates reflect the yield on zero-coupon U.S. Treasury bonds whose maturity period equals the expected term of the option. Expected volatilities are based on the historical volatility of the Company's stock. The expected option lives are based on historical experience of employee exercise behavior.

The total intrinsic value of options exercised during the years ended May 31, 2021, 2020 and 2019 was $0.8 million, $0.5 million, and $1.4 million, respectively. As of May 31, 2021, there was $3.9 million of total unrecognized compensation cost related to non-vested options, which is expected to be recognized over a weighted average period of 6 years.

Cash received from option exercises during 2021, 2020 and 2019 was $1.9 million, $0.6 million and $1.5 million, respectively. Due to the valuation allowance there was no tax benefit realized from stock option exercises during the years ended May 31, 2021, 2020 and 2019.

Restricted Stock Unit and Performance Share Awards

The Company grants restricted stock units to certain employees under the 2020 Plan, and historically under the 2004 Plan, which give the recipients the right to receive shares of Company stock upon vesting. The restricted stock unit awards vest in four equal annual installments beginning on the first anniversary of the grant date. Restricted stock unit awards granted to directors vest over one year. Unvested restricted stock unit awards will be forfeited if the recipient ceases to be employed by the Company.

 The following table summarizes information about restricted stock unit activity for the year ended May 31, 2021:

	Restricted Stock Units	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	464,921	$	19.65
Granted	533,708	$	10.40
Vested	(205,202)	$	10.02
Canceled	(31,324)	$	17.30
Non-vested at end of year, May 31, 2021	762,103	$	13.28

The fair value of each restricted stock unit is the market price of Company stock on the date of grant. The weighted average grant date fair value of restricted stock units granted during the years ended May 31, 2021, 2020 and 2019 was $10.40, $20.35 and $20.87, respectively. The total intrinsic value of restricted stock units (meaning the fair value of the units on the date of vest) vesting during the years ended May 31, 2021, 2020 and 2019 was $2.1 million, $3.9 million, and $4.6 million, respectively. As of May 31, 2021, there was $6.5 million of total unrecognized compensation cost related to non-vested restricted stock awards, which is expected to be recognized over a weighted average period of 3 years.

The Company grants performance share awards to certain employees under the 2020 Plan, and historically under the 2004 Plan, which gives the recipients the right to receive shares of Company stock if certain criteria is met.

 The following table summarizes information about performance unit award activity for the year ended May 31, 2021:

	Performance Unit Awards	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	273,121	$	22.07
Granted	232,236	$	9.72
Vested	—	$	—
Canceled	(129,066)	$	21.28
Non-vested at end of year, May 31, 2021	376,291	$	14.72

During fiscal year 2021 and 2020, the Company granted performance unit awards. Performance unit awards subject to vesting are based on the Company's level of attainment of the performance targets which are set for each of the three

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performance years along with continued employment of the grantee. At the end of the three year period, the vested shares are subject to modification based on the Company’s TSR targets relative to the percentage appreciation of a specified index of companies for the respective three-year period.

During fiscal year 2019, the Company granted performance unit awards that include a three-year market condition. Vesting of the performance unit awards is based on the Company's level of attainment of specified TSR targets relative to the percentage appreciation of a specified index of companies for the respective three-year periods. It is also subject to the continued employment of the grantees.

In order to estimate the fair value of such awards, a Monte Carlo Simulation valuation model on the date of the grant was used. For the years ended May 31, 2021, 2020 and 2019, the weighted average grant date fair market value for new grants was $9.72, $14.06 and $28.62, respectively. Compensation cost is recognized over the performance period which is typically three years. As of May 31, 2021, there was $2.1 million of unrecognized compensation cost which is expected to be recognized over a weighted average period of 2 years.

Compensation Expense

The following tables represents the break out of share-based compensation included in the Company's consolidated statement of operations:

	Year ended May 31,
(in thousands)	2021		2020		2019
Cost of sales	$	768	$	655	$	461
Research and development	1,152		971		724
Sales and marketing	1,641		1,665		1,952
General and administrative	5,064		4,301		6,112
	$	8,625	$	7,592	$	9,249

The income tax benefit on the compensation expense recognized for all share-based compensation arrangements was $2.0 million, $1.7 million and $2.1 million for the years ended May 31, 2021, 2020 and 2019, respectively. The income tax benefit for 2021, 2020 and 2019 are negated by the full valuation allowance recorded against the deferred tax assets.

Employee Stock Purchase Plan

The Employee Stock Purchase Plan (the “Stock Purchase Plan”) provides a means by which employees (the “participants”) are given an opportunity to purchase the Company's common stock through payroll deductions. A total of 4,000,000 shares of common stock have been reserved for issuance under the Stock Purchase Plan. Shares are offered through two purchase periods, each with duration of approximately 6 months, commencing on the first business day of the first and third fiscal quarters. An employee is eligible to participate in an offering period if, on the first day of an offering period, he or she has been employed in a full-time capacity for at least six months, with a customary working schedule of 20 or more hours per week and more than five months in a calendar year. Employees who own stock possessing 5% or more of the total combined voting power or value of all classes of stock are not eligible to participate in the Stock Purchase Plan. The purchase price of the shares of common stock acquired on each purchase date will be the lower of (i) 85% of the fair market value of a share of common stock on the first day of the offering period or (ii) 85% of the fair market value of a share of common stock on the last day of the purchase period, subject to adjustments made by the Board of Directors. The Stock Purchase Plan is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Internal Revenue Code. During the years ended May 31, 2017, 2019 and 2021, an additional 500,000, 1,000,000 and 500,000 shares of the Company's common stock, respectively, were reserved for issuance under the Stock Purchase Plan.

The Company uses the Black-Scholes option-pricing model to calculate the purchase date fair value of the shares issued under the Stock Purchase Plan and recognize expense related to shares purchased ratably over the offering period. During the years ended May 31, 2021, 2020 and 2019, 164,194, 100,567 and 72,863 shares, respectively, were issued at an average price of $7.95, $12.11 and $16.08, respectively, under the Stock Purchase Plan. As of May 31, 2021, 2.4 million shares remained available for future purchases under the Stock Purchase Plan.

15. EARNINGS PER SHARE

Basic earnings per share are based on the weighted average number of common shares outstanding. In addition, diluted earnings per share include the dilutive effect of potential common stock consisting of stock options, restricted stock units and performance stock units, provided that the inclusion of such securities is not anti-dilutive. In periods with a net loss, stock

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options and restricted stock units are not included in the computation of basic loss per share as the impact would be anti-dilutive.

The following table reconciles basic to diluted weighted average shares outstanding for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31,
	2021	2020	2019
Basic	38,342,476	37,961,224	37,484,573
Effect of dilutive securities	—	—	—
Diluted	38,342,476	37,961,224	37,484,573
Securities excluded as their inclusion would be anti-dilutive	3,285,354	2,581,006	2,200,318

16. LEASES

Adoption of ASU No. 2016-02, Leases (Topic 842)

On June 1, 2019, the Company adopted ASU No. 2016-02 using the modified retrospective approach. This ASU increases transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about leasing arrangements. Comparative periods prior to adoption have not been retrospectively adjusted.

The Company elected the three practical expedients that permit an entity to a) not reassess whether expired or existing contracts contain leases, b) not reassess lease classification for existing or expired leases, and c) not consider whether previously capitalized initial direct costs would be appropriate under the new standard. Further, the Company has elected to not recognize leases with terms of 12 months or less on the balance sheet, and elected to account for lease and non-lease components as a single component for certain classes of assets.

The adoption of this standard resulted in the recording of an additional lease asset and lease liability of approximately $5.6 million. The standard did not have a material impact on the Company's Consolidated Statement of Operations, Stockholders Equity or Cash Flows.

Leases

The Company determines if an arrangement is a lease at inception of the contract. The Company has operating leases for buildings, primarily for office space, R&D, manufacturing and warehousing.

Operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. Many of the lease agreements contain renewal or termination clauses that are factored into the determination of the lease term if it is reasonably certain that these options would be exercised. The Company recognizes lease expense for these leases on a straight-line basis over the lease term.

The following table presents supplemental balance sheet information related to leases:

(in thousands)	Balance Sheet Location	May 31, 2021		May 31, 2020
Assets
Operating lease ROU asset	Other assets	$	9,382	$	10,146
Liabilities
Current operating lease liabilities	Other current liabilities	2,415		2,077
Non-current operating lease liabilities	Other long-term liabilities	7,319		8,345
Total lease liabilities		$	9,734	$	10,422

The interest rate implicit in lease agreements is typically not readily determinable, and as such the Company used the incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The incremental borrowing rate is defined as the interest the Company would pay to borrow on a collateralized basis, considering factors such as length of lease term. The following table presents the weighted average remaining lease term and discount rate:

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	May 31, 2021		May 31, 2020
Weighted average remaining term (in years)	4.12		5.00
Weighted average discount rate	3.8	%	4.2	%

The maturities of the lease liabilities for each of the following fiscal years is:

(in thousands)	May 31, 2021
2021	$	2,735
2022	2,787
2023	2,209
2024	1,454
2025	1,148
2026 and thereafter	171
Total lease payments	$	10,504
Less: Imputed Interest	770
Total lease obligations	$	9,734
Less: Current portion of lease obligations	2,415
Long-term lease obligations	$	7,319

During the years ended May 31, 2021 and May 31, 2020, the Company recognized operating lease expense which includes immaterial short-term leases of $3.2 million and $3.4 million, respectively. Rent expense prior to adoption of ASC 842 amounted to $2.5 million for the year ended May 31, 2019.

As of May 31, 2021 and 2020, the expenses on the Consolidated Statement of Operations were classified as follows:

(in thousands)	May 31, 2021		May 31, 2020
Cost of sales	$	820	$	1,138
Research and development	857		583
Sales and marketing	407		397
General and administrative	1,123		1,233
	$	3,207	$	3,351

The following table presents supplemental cash flow and other information related to leases for the year ended May 31, 2021 and 2020:

(in thousands)	May 31, 2021		May 31, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	2,698	$	2,372
ROU assets obtained in exchange for lease liabilities
Operating leases	1,585		6,918

17. COMMITMENTS AND CONTINGENCIES

Other Commitments and Contingencies

The following table summarizes the Company's other future commitments and contingencies as of May 31, 2021:

(in thousands)	Total		2022		2023		2024		2025		2026 and thereafter
Purchase obligations (1)	$	4,697	$	4,697	$	—	$	—	$	—	$	—
Royalties (2)	47,700		3,800		3,800		3,800		3,800		32,500
	$	52,397	$	8,497	$	3,800	$	3,800	$	3,800	$	32,500

(1) The non-cancelable inventory purchase obligations are not reflected on the consolidated balance sheets under accounting principles generally accepted in the United States of America.

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(2) These are future minimum royalty payments.

Legal Proceedings

The Company is involved in various legal proceedings, including commercial, intellectual property, product liability, and regulatory matters of a nature considered normal for its business. The Company accrues for amounts related to these matters if it is probable that a liability has been incurred, and an amount can be reasonably estimated. The Company discloses such matters when there is at least a reasonable possibility that a material loss may have been incurred. However, the Company cannot predict the outcome of any litigation or the potential for future litigation.

C.R. Bard, Inc. v. AngioDynamics, Inc.

On January 11, 2012, C.R. Bard, Inc. (“Bard”) filed a suit in the United States District Court of Utah claiming certain of the Company's implantable port products infringe on three U.S. patents held by Bard (US Patent Nos. 7,785,302, 7,959,615 (“615”) and 7,947,022). The case was stayed pending reexamination in the US Patent and Trademark Office ("USPTO"). Following the reexamination proceedings, and the parties’ related appeals to the Federal Circuit which resulted in further proceedings at the USPTO, certain claims of the 615 patent were held invalid, while the remaining claims of the 615 patent and the other two patents were upheld over the prior art references considered in the reexamination proceedings. Thereafter, the case was transferred from the District of Utah to the United States District Court for the District of Delaware (“District of Delaware”). A scheduling order was entered on March 23, 2021. The Company filed a Motion to Amend its Answer and Counterclaims on April 14, 2021. This motion seeks to add counterclaims for infringement of U.S. Patent Nos. 9,168,365; 9,895,523; and 10,632,295, as well as a counterclaim of inequitable conduct, and remains pending. The Company served its initial invalidity contentions on July 2, 2021, consistent with the scheduling order. The Company believes these claims are without merit and intends to defend them vigorously. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

On March 10, 2015, Bard and Bard Peripheral Vascular filed suit in the District of Delaware claiming certain of the Company's implantable port products infringe on three U.S. patents held by Bard (US Patent Nos. 8,475,417, 8,545,460, 8,805,478). The case proceeded through trial which began on March 4, 2019. On day four of the jury trial, at the close of Bard’s case, the Court granted the Company's oral motion for judgment as a matter of law as well as its motions for summary judgment on the grounds that the asserted patents are invalid, ineligible, not infringed and not willfully infringed. On May 10, 2019, the Company filed a motion for attorney fees and non-taxable expenses under 35 USC Sec. 285. Bard appealed the judgment to the Federal Circuit and on November 10, 2020, the Federal Circuit reversed the judgment in part with respect to Section 101, and vacated and remanded the trial court’s invalidity and non-infringement judgments. The Company filed a combined Petition for rehearing and rehearing en banc on December 10, 2020, which was denied on January 15, 2021. The Federal Circuit issued its mandate on January 22, 2021. On March 15, 2021, the District of Delaware entered an order requiring the parties to submit status reports and denied as moot the Company’s motion for attorney’s fees and expenses. The parties submitted status reports on March 29, 2021. The matter remains pending. The Company maintains its belief that Bard’s claims are without merit. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

On March 8, 2021, Bard filed suit in the District of Delaware asserting certain of the Company’s port products (including certain related infusion sets) infringe U.S. Patent Nos. 8,025,639, 9,603,992 (“992”) and 9,603,993 (“993”). On May 20, 2021, the Company filed a Motion to Dismiss Bard’s claims with respect to the 992 and 993 patents, and the motion remains pending. The Company maintains its belief that Bard’s claims are without merit. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

AngioDynamics, Inc. v. C.R. Bard, Inc.

On May 30, 2017, the Company commenced an action in the United States District Court for the Northern District of New York entitled AngioDynamics, Inc. v. C.R. Bard, Inc. and Bard Access Systems, Inc. (“Bard”). In this action, the Company alleges that Bard has illegally tied the sales of its tip location systems to the sales of its PICCs. The Company alleges that this practice violates the federal antitrust laws and has had, and continues to have, an anti-competitive effect in the market for PICCs. The Company seeks both monetary damages and injunctive relief. Bard moved to dismiss on September 8, 2017. On August 6, 2018 the court denied Bard’s motion in its entirety. Bard made a motion for summary judgment which was denied in its entirety in a decision issued by the Court on May 5, 2021. Bard also raised a series of challenges targeted at one of AngioDynamics’ expert witnesses, which the Court denied in part and granted in part in decisions on May 5, 2021 and June 11, 2021. Discovery is largely complete, and the case is expected to proceed to trial in 2022.

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Merz North America Settlement

On May 16, 2019, Merz North America, Inc. (“Merz”) commenced an action in the United States District Court for the Southern District of New York entitled Merz North America, Inc. v. AngioDynamics, Inc. In this action, Merz alleged breach of contract against AngioDynamics based on a March 1, 2016 Distribution Agreement. On June 28, 2019, AngioDynamics reached a settlement with Merz. AngioDynamics made a lump-sum payment of $2.5 million to Merz in return for dismissal of the case with prejudice during the first quarter of fiscal year 2020. The case was subsequently dismissed.

18. SEGMENTS AND GEOGRAPHIC INFORMATION

Segment information

The Company considers its business to be a single segment entity related to the development, manufacture and sale on a global basis of medical devices for vascular access, surgery, peripheral vascular disease and oncology. The Company's chief operating decision maker (CEO) evaluates the various global product portfolios on a net sales basis. Executives reporting in to the CEO include those responsible for operations and supply chain management, research and development, sales, franchise marketing and certain corporate functions. The CEO evaluates profitability, investment and cash flow metrics on a consolidated worldwide basis due to shared infrastructure and resources.

Total sales by product category are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Product Category
Endovascular Therapies	$	135,079	$	112,706	$	119,901
Vascular Access	101,310		94,299		94,730
Oncology/Surgery	54,621		57,152		56,003
Total	$	291,010	$	264,157	$	270,634

Geographic information

Total sales for geographic areas are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Geography
United States	$	237,043	$	207,980	$	216,957
International	53,967		56,177		53,677
Total	$	291,010	$	264,157	$	270,634

For fiscal years 2021, 2020 and 2019, international sales as a percentage of total net sales were 19%, 21% and 20%, respectively. Sales to any one country outside the U.S., as determined by shipment destination, did not comprise a material portion of net sales in any of the last three fiscal years. In addition, no one customer represents more than 10% of consolidated net sales. 99% of long-lived assets are located within the United States.

19. ACQUISITION, RESTRUCTURING AND OTHER ITEMS, NET

Acquisition, restructuring and other items, net consisted of:

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	Year ended May 31,
(in thousands)	2021		2020		2019
Legal (1)	$	6,161	$	2,666	$	7,802
Mergers and acquisitions (2)	1		782		4,030
Transition service agreement (3)	(1,032)		(1,799)		—
Divestiture (4)	393		2,809		—
Intangible and other asset impairment (5)	13,953		—		1,704
Restructuring	—		26		289
Other	756		1,530		1,302
Total	$	20,232	$	6,014	$	15,127

(1) Legal expenses related to litigation that is outside the normal course of business.

(2) Mergers and acquisitions expenses related to investment banking, legal and due diligence.

(3) Transition services agreement that was entered into as a result of the sale of the Fluid Management business.

(4) Divestiture expenses incurred to transition manufacturing from Glens Falls, NY to Queensbury, NY.

(5) During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million

Included in legal for fiscal year 2021, is a $1.0 million settlement expense. Included in legal for fiscal years 2020 and 2019 are settlements received for the Biolitec litigation of $0.5 million and $3.4 million, respectively. The settlement received partially offsets legal expenses paid related to the settlement proceedings. In addition, the $2.5 million accrual for the settlement of the Merz contract termination is included in legal expenses for fiscal year 2019. 

20. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Changes in each component of accumulated other comprehensive income (loss), net of tax, are as follows for fiscal years 2021 and 2020:

(in thousands)	Foreign currency translation gain (loss)
Balance at May 31, 2019	$	(1,352)
Other comprehensive income before reclassifications, net of tax	11
Net other comprehensive income	$	11
Balance at May 31, 2020	$	(1,341)
Other comprehensive income (loss) before reclassifications, net of tax	4,494
Net other comprehensive loss	$	4,494
Balance at May 31, 2021	$	3,153

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AngioDynamics, Inc. and Subsidiaries

(in thousands)	SCHEDULE II -VALUATION AND QUALIFYING  ACCOUNTS
Description	Balance at Beginning of Year		Additions - Charged to costs and expenses		Deductions		Balance at End of Period
Year Ended May 31, 2019
Allowance for deferred tax asset	$	26,607	$	—	$	(14,919)	$	11,688
Allowance for sales returns and doubtful accounts	$	2,466	$	393	$	(953)	$	1,906
Year Ended May 31, 2020
Allowance for deferred tax asset	$	11,688	$	1,426	$	—	$	13,114
Allowance for sales returns and doubtful accounts	$	1,906	$	1,218	$	(974)	$	2,150
Year Ended May 31, 2021
Allowance for deferred tax asset	$	13,114	$	3,921	$	—	$	17,035
Allowance for sales returns and doubtful accounts	$	2,150	$	1,833	$	(2,064)	$	1,919

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EXHIBITS

		Incorporated by Reference
Exhibit Number	Description of Exhibits	Form	Exhibit	Filing Date
2.2	Stock Purchase Agreement, dated as of October 8, 2012, by and among AngioDynamics, Inc., Vortex Medical, Inc. (“Vortex”), the stockholders of Vortex set forth on the signature pages thereto, the option holders of Vortex set forth on the signature pages thereto and CHTP Management Services, Inc., as sellers’ representative.	8-K	2.1	October 12, 2012
2.3	Asset Purchase Agreement dated as of April 17, 2019 by and between AngioDynamics, Inc. and Medline Industries Inc.	8-K	2.1	April 18, 2019
3.1.1	Amended and Restated Certificate of Incorporation.	10-Q	3.1	October 7, 2005
3.1.2	Certificate of Amendment to the Amended and Restated Certificate of Incorporation of AngioDynamics, Inc.	10-K	3.1.2	August 10, 2015
3.2	Second Amended and Restated By-Laws, effective October 16, 2015.	8-K	10.1	October 21, 2015
10.1	Credit Agreement, dated as of June 3, 2019, by and among AngioDynamics, Inc., the lenders party thereto, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, N.A. and Keybank National Association as co-syndication agents.	8-K	10.1	June 6, 2019
10.1.3	AngioDynamics, Inc. 2004 Stock and Incentive Award Plan (as amended).	DEF 14A		August 30, 2018
10.1.6	AngioDynamics 2017 Total Shareholder Return Performance Unit Agreement Program.	10-Q	10.1	September 29, 2017
10.1.7	AngioDynamics 2018 Total Shareholder Return Performance Unit Agreement Program.	10-K	10.1.7	July 23, 2018
10.1.8	AngioDynamics 2019 Total Shareholder Return Performance Unit Agreement Program.	10-Q	10.1.8	January 8, 2020
10.1.9	AngioDynamics, Inc. 2020 Stock and Incentive Award Plan	DEF 14A		September 3, 2020
10.2	AngioDynamics, Inc. Employee Stock Purchase Plan (as amended).	DEF 14A		September 3, 2020
10.3	Form of Non-Statutory Stock Option Agreement pursuant to the AngioDynamics, Inc. Stock and Incentive Award Plan.	10-Q	10.1	October 12, 2004
10.3.1	Form of Non-Statutory Stock Option Agreement pursuant to the AngioDynamics, Inc. Stock and Incentive Award Plan.	10-K	10.3.1	July 23, 2018
10.4.3	Form of 2016 Performance Share Award Agreement pursuant to the AngioDynamics, Inc. 2004 Stock and Incentive Award Plan.	10-Q	10.2	October 5, 2016
10.4.4	Form of 2017 Performance Share Award Agreement pursuant to the AngioDynamics, Inc. 2004 Stock and Incentive Award Plan.	10-Q	10.2	September 29, 2017
10.4.5	Form of 2018 Performance Share Award Agreement pursuant to the AngioDynamics, Inc. 2004 Stock and Incentive Award Plan.	10-K	10.4.5	July 23, 2018
10.4.6	Form of 2020 Performance Share Award Agreement pursuant to the AngioDynamics, Inc. 2004 Stock and Incentive Award Plan	10-Q	10.4.6	January 8, 2021
10.5	Form of Restricted Stock Award Agreement pursuant to the AngioDynamics, Inc. 2004 Stock and Incentive Award Plan.	8-K	10.3	May 12, 2005
10.6	Rita Medical Systems, Inc. 1994 Incentive Stock Plan.	S-1	10.2	May 3, 2000

85

		Incorporated by Reference
Exhibit Number	Description of Exhibits	Form	Exhibit	Filing Date
10.7	Horizon Medical Products, Inc. 1998 Stock Incentive Plan.	S-1	10.11	February 13, 1998
10.8	Rita Medical Systems, Inc. 2000 Stock Plan.	S-1/A	10.3	June 14, 2000
10.9	Rita Medical Systems, Inc. 2000 Directors’ Stock Plan, as amended on June 8, 2005.	S-8	99.2	July 8, 2005
10.10	Rita Medical Systems, Inc. 2005 Stock and Incentive Plan.	S-8	99.1	July 8, 2005
10.11	Form of Indemnification Agreement of AngioDynamics, Inc.	8-K	10.1	May 12, 2006
10.11.1	Employment Agreement, dated April 1, 2016, between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.1	April 6, 2016
10.12	Change in Control Agreement, dated April 1, 2016, between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.2	April 6, 2016
10.12.2	Form of Severance Agreement of AngioDynamics, Inc.	10-K	10.12.2	August 10, 2020
10.13	Form of Change in Control Agreement.	10-K/A	10.13	January 12, 2015
10.14	Performance Share Award Agreement, with a grant date of April 4, 2016, between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.3	April 6, 2016
10.15	AngioDynamics, Inc. Total Shareholder Return Performance Share Award Program - Performance Period Ending July 2019.	8-K	10.4	April 6, 2016
10.16	Stock Option Award Agreement, with a grant date of April 4, 2016, between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.5	April 6, 2016
10.17	Restricted Stock Unit Award Agreement, with a grant date of April 4, 2016, between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.6	April 6, 2016
10.18	Separation Agreement and General Release, dated April 22, 2016, between AngioDynamics, Inc. and Joseph M. DeVivo.	8-K	10.1	April 27, 2016
10.19	Amended and Restated Change in Control Agreement, by and between AngioDynamics, Inc. and James C. Clemmer.	8-K	10.1	February 3, 2021
10.2	Form of Amended and Restated Change in Control Agreement with AngioDynamics, Inc.	8-K	10.2	February 3, 2021
14	Code of Ethics.	8-K	14	May 21, 2006
21	Subsidiaries
23	Consent of Deloitte & Touche LLP, an independent registered public accounting firm.
31.1	Certification by the Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification by the Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification by the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification by the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Schema Document
101.CAL	XBRL Calculation Linkbase Documents
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Labels Linkbase Documents
101.PRE	XBRL Presentation Linkbase Documents

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		ANGIODYNAMICS, INC.
Date:	July 27, 2021	By:	/S/    HOWARD W. DONNELLY
			Howard W. Donnelly, Chairman of the Board, Director

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Date:	July 27, 2021	/S/    HOWARD W. DONNELLY
		Howard W. Donnelly,
		Chairman of the Board, Director
Date:	July 27, 2021	/S/    JAMES C. CLEMMER
		James C. Clemmer,
		President, Chief Executive Officer (Principal Executive Officer)
Date:	July 27, 2021	/S/    STEPHEN A. TROWBRIDGE
		Stephen A. Trowbridge,
		Executive Vice President, Chief Financial Officer, (Principal Financial and Accounting Officer)
Date:	July 27, 2021	/S/    WESLEY E. JOHNSON, JR.
		Wesley E. Johnson, Jr.,
		Director
Date:	July 27, 2021	/S/    DENNIS S. METENY
		Dennis S. Meteny,
		Director
Date:	July 27, 2021	/S/    JAN S. REED
		Jan S. Reed,
		Director
Date:	July 27, 2021	/S/    EILEEN O. AUEN
		Eileen O. Auen,
		Director
Date:	July 27, 2021	/S/   KAREN A. LICITRA
		Karen A. Licitra,
		Director
Date:	July 27, 2021	/S/   MICHAEL E. TARNOFF
		Michael E. Tarnoff,
		Director

87

EX-21

Exhibit 21

Subsidiaries of AngioDynamics, Inc.

Subsidiary	State of Incorporation or Organization
Vortex Medical	Delaware
NM Holding Company, Inc.	Delaware
Navilyst Medical Holdings, Inc.	Delaware
Navilyst Medical, Inc.	Delaware
AngioDynamics UK Limited	United Kingdom
AngioDynamics Netherlands B. V.	Netherlands
RITA Medical Systems, LLC	Delaware
AngioDynamics France, SARL	France
AngioDynamics Canada Inc.	British Columbia
AngioDynamics Medical Brasil Participacoes Ltda.	Sao Paulo
RadiaDyne LLC	Texas
Eximo Medical, Ltd.	Israel
AngioDynamics VA LLC	Delaware

EX-23

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-120057, 333-138456, 333-140627, 333-161355, 333-162844, 333-170619, 333-190640, 333-203441, 333-229814 and 333-252209 on Form S-8 of our reports dated July 27, 2021, relating to the financial statements of AngioDynamics Inc. and the effectiveness of AngioDynamics Inc.'s internal control over financial reporting appearing in this Annual Report on Form 10-K for the year ended May 31, 2021.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

July 27, 2021

EX-31.1

Exhibit 31.1

CERTIFICATION

I, James C. Clemmer, certify that:

1. I have reviewed this annual report on Form 10-K of AngioDynamics, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2021

/ S / JAMES C. CLEMMER

James C. Clemmer, President,

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Stephen A. Trowbridge, certify that:

1. I have reviewed this annual report on Form 10-K of AngioDynamics, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2021

/ S / STEPHEN A. TROWBRIDGE

Stephen A. Trowbridge, Executive Vice President,

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO TITLE 18,

UNITED STATES CODE, SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, James C. Clemmer, President, Chief Executive Officer and Director of ANGIODYNAMICS, Inc. (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that, to the best of my knowledge:

1. the annual report on Form 10-K of the Company for the fiscal year ended May 31, 2021 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 27, 2021

/S/ JAMES C. CLEMMER

James C. Clemmer, President,

Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO TITLE 18,

UNITED STATES CODE, SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Stephen A. Trowbridge, Chief Financial Officer of ANGIODYNAMICS, Inc. (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that, to the best of my knowledge:

1. the annual report on Form 10-K of the Company for the fiscal year ended May 31, 2021 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 27, 2021

/S/ STEPHEN A. TROWBRIDGE

Stephen A. Trowbridge, Executive Vice President,

Chief Financial Officer

XML

Cover Page - USD ($)	12 Months Ended
	May 31, 2021	Jul. 26, 2021	Nov. 30, 2020
Cover [Abstract]
Entity Central Index Key	0001275187
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--05-31
Document Type	10-K
Document Annual Report	true
Document Period End Date	May 31, 2021
Document Transition Report	false
Entity File Number	0-50761
Entity Registrant Name	AngioDynamics, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-3146460
Entity Address, Address Line One	14 Plaza Drive
Entity Address, City or Town	Latham
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	12110
City Area Code	518
Local Phone Number	795-1400
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	ANGO
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 496,277,118
Entity Common Stock, Shares Outstanding		38,444,076
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCEThe information required for Part III of this Annual Report on Form 10-K is incorporated by reference to the registrant’s Proxy Statement for its 2021 Annual Meeting of Stockholders to be filed within 120 days of the registrant's fiscal year ended May 31, 2021.

XML

Consolidated Statements of Operations - USD ($)	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Income Statement [Abstract]
Net sales	$ 291,010,000	$ 264,157,000	$ 270,634,000
Cost of sales (exclusive of intangible amortization)	134,222,000	113,885,000	114,634,000
Gross profit	156,788,000	150,272,000	156,000,000
Operating expenses
Research and development	36,390,000	29,682,000	28,258,000
Sales and marketing	81,306,000	78,634,000	76,829,000
General and administrative	35,918,000	37,872,000	34,902,000
Amortization of intangibles	18,136,000	18,121,000	17,056,000
Goodwill impairment	0	158,578,000	0
Change in fair value of contingent consideration	89,000	(11,531,000)	(6,776,000)
Acquisition, restructuring and other items, net	20,232,000	6,014,000	15,127,000
Total operating expenses	192,071,000	317,370,000	165,396,000
Operating loss	(35,283,000)	(167,098,000)	(9,396,000)
Other expenses
Interest expense, net	(861,000)	(907,000)	(5,099,000)
Other income (expense), net	92,000	(130,000)	(207,000)
Total other expenses, net	(769,000)	(1,037,000)	(5,306,000)
Loss from continuing operations before income tax benefit	(36,052,000)	(168,135,000)	(14,702,000)
Income tax benefit	(4,504,000)	(1,348,000)	(3,556,000)
Net loss from continuing operations	(31,548,000)	(166,787,000)	(11,146,000)
Income from discontinued operations, net of income tax	0	0	72,486,000
Net income (loss)	$ (31,548,000)	$ (166,787,000)	$ 61,340,000
Loss per share - continuing operations
Basic (usd per share)	$ (0.82)	$ (4.39)	$ (0.30)
Diluted (usd per share)	(0.82)	(4.39)	(0.30)
Income per share - discontinued operations
Basic (usd per share)	0	0	1.93
Diluted (usd per share)	0	0	1.93
Income (loss) per share
Basic (usd per share)	(0.82)	(4.39)	1.64
Diluted (usd per share)	$ (0.82)	$ (4.39)	$ 1.64
Weighted average shares outstanding
Basic (in shares)	38,342,476	37,961,224	37,484,573
Diluted (in shares)	38,342,476	37,961,224	37,484,573

XML

Consolidated Statements Comprehensive Income (Loss) - USD ($)	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (31,548,000)	$ (166,787,000)	$ 61,340,000
Other comprehensive income (loss), before tax:
Unrealized gain on marketable securities	0	0	33,000
Reclassification adjustment for gains included in net income	0	0	(116,000)
Foreign currency translation gain (loss)	4,494,000	11,000	(317,000)
Other comprehensive income (loss), before tax	4,494,000	11,000	(400,000)
Income tax benefit (expense) related to items of other comprehensive income (loss)	0	0	0
Other comprehensive income (loss), net of tax	4,494,000	11,000	(400,000)
Total comprehensive income (loss), net of tax	$ (27,054,000)	$ (166,776,000)	$ 60,940,000

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Current Assets
Cash and cash equivalents	$ 48,161	$ 54,435
Accounts receivable, net of allowances of $1,919 and $2,150, respectively	35,405	31,263
Inventories	48,614	59,905
Prepaid expenses and other	8,699	7,310
Total current assets	140,879	152,913
Property, plant and equipment, net	37,073	28,312
Intangible assets, net	168,977	197,136
Goodwill	201,316	200,515
Other assets	13,193	15,338
Total Assets	561,438	594,214
Current Liabilities
Accounts payable	19,630	19,096
Accrued liabilities	35,459	29,380
Current portion of contingent consideration	0	836
Other current liabilities	2,495	2,133
Total current liabilities	57,584	51,445
Long-term debt	20,000	40,000
Deferred income taxes	19,955	24,057
Contingent consideration, net of current portion	15,741	14,811
Other long-term liabilities	8,701	9,029
Total Liabilities	121,981	139,342
Commitments and Contingencies (Note 17)
Stockholders’ Equity
Preferred stock, par value $0.01 per share, 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, par value $0.01 per share, 75,000,000 shares authorized; 38,920,951 and 38,448,536 shares issued and 38,550,951 and 38,078,536 shares outstanding at May 31, 2021 and 2020, respectively	377	374
Additional paid-in capital	573,507	561,871
Accumulated deficit	(131,866)	(100,318)
Treasury stock, 370,000 shares, at cost at May 31, 2021 and 2020, respectively	(5,714)	(5,714)
Accumulated other comprehensive loss	3,153	(1,341)
Total Stockholders' Equity	439,457	454,872
Total Liabilities and Stockholders' Equity	$ 561,438	$ 594,214

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 1,919	$ 2,150
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	75,000,000	75,000,000
Common stock, shares issued (shares)	38,920,951	38,448,536
Common stock, shares outstanding (shares)	38,550,951	38,078,536
Treasury stock, shares (shares)	370,000,000	370,000,000

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Consolidated Statements of Stockholders' Equity - USD ($)	Total	Restricted Stock Units	Performance Shares	Common Stock	Common Stock Restricted Stock Units	Common Stock Performance Shares	Additional paid in capital	Additional paid in capital Restricted Stock Units	Retained earnings (accumulated deficit)	Accumulated other comprehensive income (loss)	Treasury Stock
Beginning Balance, Shares at May. 31, 2018				37,594,493							370,000
Beginning Balance at May. 31, 2018	$ 542,595,000			$ 370,000			$ 543,762,000		$ 5,129,000	$ (952,000)	$ (5,714,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	61,340,000								61,340,000
Exercise of stock options, Shares				134,253
Exercise of stock options	1,526,000			$ 1,000			1,525,000
Issuance/cancellation of common stock units, Shares					177,538	5,235
Issuance/cancellation of common stock units		$ (667,000)	$ 0					$ (667,000)
Purchase of common stock under Employee Stock Purchase Plan, Shares				72,863
Purchase of common stock under Employee Stock Purchase Plan	1,172,000			$ 1,000			1,171,000
Stock-based compensation	9,249,000						9,249,000
Other comprehensive income (loss), net of tax	(400,000)									(400,000)
Ending Balance at May. 31, 2019	614,815,000			$ 372,000			555,040,000		66,469,000	(1,352,000)	$ (5,714,000)
Ending Balance, Shares at May. 31, 2019				37,984,382							370,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(166,787,000)								(166,787,000)
Exercise of stock options, Shares				50,636
Exercise of stock options	561,000			$ 1,000			560,000
Issuance/cancellation of common stock units, Shares					312,951
Issuance/cancellation of common stock units		(2,537,000)						(2,537,000)
Purchase of common stock under Employee Stock Purchase Plan, Shares				100,567
Purchase of common stock under Employee Stock Purchase Plan	1,217,000			$ 1,000			1,216,000
Stock-based compensation	7,592,000						7,592,000
Other comprehensive income (loss), net of tax	11,000									11,000
Ending Balance at May. 31, 2020	454,872,000			$ 374,000			561,871,000		(100,318,000)	(1,341,000)	$ (5,714,000)
Ending Balance, Shares at May. 31, 2020				38,448,536							370,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ (31,548,000)								(31,548,000)
Exercise of stock options, Shares	137,237			123,536
Exercise of stock options	$ 1,930,000			$ 1,000			1,929,000
Issuance/cancellation of common stock units, Shares					184,685
Issuance/cancellation of common stock units		$ (223,000)						$ (223,000)
Purchase of common stock under Employee Stock Purchase Plan, Shares				164,194
Purchase of common stock under Employee Stock Purchase Plan	1,307,000			$ 2,000			1,305,000
Stock-based compensation	8,625,000						8,625,000
Other comprehensive income (loss), net of tax	4,494,000									4,494,000
Ending Balance at May. 31, 2021	$ 439,457,000			$ 377,000			$ 573,507,000		$ (131,866,000)	$ 3,153,000	$ (5,714,000)
Ending Balance, Shares at May. 31, 2021				38,920,951							370,000

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Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (31,548,000)	$ (166,787,000)	$ 61,340,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	25,916,000	23,805,000	25,880,000
Non-cash lease expense	2,456,000	2,070,000	0
Goodwill impairment	0	158,578,000	0
Stock based compensation	8,625,000	7,592,000	9,249,000
Gain on disposition	0	0	(46,592,000)
Transaction costs for disposition	0	0	(4,030,000)
Change in fair value of contingent consideration	89,000	(11,531,000)	(6,776,000)
Deferred income tax provision	(4,805,000)	(1,568,000)	(2,655,000)
Changes in accounts receivable allowances	207,000	429,000	(202,000)
Asset impairments and disposals	14,228,000	1,321,000	2,495,000
Other	(147,000)	86,000	(5,000)
Changes in operating assets and liabilities:
Accounts receivable	(4,162,000)	11,918,000	(3,177,000)
Inventories	11,539,000	(18,845,000)	(1,428,000)
Prepaid expenses and other	(3,181,000)	(6,155,000)	(1,871,000)
Accounts payable, accrued and other liabilities	4,876,000	(15,467,000)	5,212,000
Net cash provided by (used in) operating activities	24,093,000	(14,554,000)	37,440,000
Cash flows from investing activities:
Additions to property, plant and equipment	(5,187,000)	(7,235,000)	(3,118,000)
Additions to placement and evaluation units	(8,524,000)	0	0
Proceeds from disposition of discontinued operations	0	0	169,242,000
Cash paid for acquisitions	0	(55,760,000)	(84,920,000)
Acquisition of intangibles	0	(350,000)	0
Proceeds from sale of marketable securities	0	0	1,350,000
Net cash provided by (used in) investing activities	(13,711,000)	(63,345,000)	82,554,000
Cash flows from financing activities:
Repayment of long-term debt	(20,000,000)	(132,500,000)	(15,000,000)
Proceeds from borrowings on long-term debt	0	40,000,000	55,000,000
Deferred financing costs on long-term debt	0	(775,000)	0
Payment of acquisition related contingent consideration	0	(1,208,000)	(8,100,000)
Proceeds (outlays) from exercise of stock options and employee stock purchase plan	3,014,000	(759,000)	2,031,000
Net cash provided by (used in) financing activities	(16,986,000)	(95,242,000)	33,931,000
Effect of exchange rate changes on cash and cash equivalents	330,000	(65,000)	(380,000)
(Decrease) increase in cash and cash equivalents	(6,274,000)	(173,206,000)	153,545,000
Cash and cash equivalents at beginning of year	54,435,000	227,641,000	74,096,000
Cash and cash equivalents at end of year	48,161,000	54,435,000	227,641,000
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of fixed assets	(139,000)	224,000	(114,000)
Fair value of contingent consideration for acquisitions	0	14,900,000	25,100,000
Fair value of acquisition consideration included in accrued expenses	0	0	4,650,000
Cash paid during the year for:
Interest	731,000	413,000	5,115,000
Income taxes	$ 313,000	$ 682,000	$ 426,000

XML

Basis of Presentation, Business Description and Summary of Significant Accounting Policies

12 Months Ended

May 31, 2021

Accounting Policies [Abstract]

BASIS OF PRESENTATION, BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION, BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Description of Business

The consolidated financial statements include the accounts of AngioDynamics, Inc. and its wholly owned subsidiaries, (collectively, "us", "we", or the “Company”).

The Company designs, manufactures and sells a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and in oncology and surgical settings. The devices are generally used in minimally invasive, image-guided procedures. Most of the Company's products are intended to be used once and then discarded, or they may be temporarily implanted for short- or long-term use.

On May 31, 2019, the Company completed the sale of the Fluid Management business and all of the assets used primarily in connection with the Fluid Management business (Note 3). As the disposal of this business represents a strategic shift with a major effect on the Company's operations, for all periods presented in the Consolidated Statements of Operations and Comprehensive Income, all sales, costs, expenses, gains and income taxes attributable to Fluid Management have been reported under the captions, “Income from Discontinued Operations, Net of Income Tax.”  Cash flows used in or provided by Fluid Management have been reported in the Consolidated Statements of Cash Flows under operating and investing activities.

Accounting Principles

The consolidated financial statements and accompanying notes have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP").

Principles of Consolidation

The consolidated financial statements include the accounts of AngioDynamics and its subsidiaries (all of which are wholly owned). All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of consolidated financial statements, in conformity with accounting principles generally accepted in the United States of America, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Estimates also affect reported amounts of sales and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all unrestricted highly liquid investments with an initial maturity of less than three months at the date of purchase to be cash equivalents. The Company maintains cash and cash equivalent balances with financial institutions in the United States in excess of amounts insured by the Federal Deposit Insurance Corporation.

Fair Value Instruments

The carrying amount of the Company's cash and cash equivalents, accounts receivable, accounts payable and long-term debt approximates fair value due to the short-term nature or market interest rates of these items. The Company bases the fair value of short-term investments on quoted market prices or other relevant information generated by market transactions involving identical or comparable assets. The Company measures and records derivative financial instruments at fair value. See Note 5 for further discussion of financial instruments that are carried at fair value on a recurring and nonrecurring basis.

Accounts Receivable

Accounts receivable, principally trade receivables, are generally due within 30 to 90 days and are stated at amounts due from customers, net of an allowance for estimated sales returns and doubtful accounts. The Company performs ongoing credit evaluations of customers and adjusts credit limits based upon payment history and the customer’s current creditworthiness, as determined by a review of their current credit information. The Company continuously monitors aging reports, collections and payments from customers, and a provision for estimated credit losses is maintained based upon historical experience and any specific customer collection issues that have been identified. While such credit losses have historically been within expectations

and the provisions established, the Company cannot guarantee that the same credit loss rates will be experienced in the future. The Company writes off accounts receivable when they are determined to be uncollectible.

Inventories

Inventories are stated at the lower of cost or net realizable value based on the first-in, first-out cost method and consist of raw materials, work in process and finished goods. The standard cost of finished goods and work-in-process inventory is composed of material, labor and manufacturing overhead, which approximates actual cost. In addition to stating inventory at the lower of cost or net realizable value, we also evaluate inventory each reporting period for excess quantities and obsolescence, establishing reserves when necessary based upon historical experience, assessment of economic conditions and expected demand. Once recorded, these reserves are considered permanent adjustments to the carrying value of inventory An increase to inventory reserves results in a corresponding increase in cost of revenue. Inventories are written off against the reserve when they are physically disposed.

Property, Plant and Equipment

Property, plant and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Placement and evaluation units represent capital equipment placed at customer locations under placement or evaluation agreements for which depreciation expense is included in cost of sales on the Consolidation Statements of Operations. Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	3 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

The Company evaluates property, plant and equipment for impairment periodically to determine if changes in circumstances or the occurrence of events suggest the carrying value of the asset or asset group may not be recoverable. Expenditures for repairs and maintenance are charged to expense as incurred. Renewals and betterments are capitalized.

Goodwill and Intangible Assets

Contingent Consideration

The fair value of the liability for contingent consideration recorded on the acquisition date for a business combination is based on probability weighted estimated cash flow streams, discounted back to present value using a discount rate determined in accordance with accepted valuation methods and reflective of the risk associated with the estimated cash flow streams. The liability for contingent consideration is remeasured to fair value at each reporting period with changes recorded in earnings until the contingency is resolved.

Revenue Recognition

The Company recognizes revenue when it transfers control of promised goods or services to its customers in an amount that reflects the consideration to which the Company expects to be entitled to in exchange for those goods and services. See Note 4, “Revenue from Contracts with Customers” for further discussion on revenue.

Research and Development

Research and development costs, including salaries, consulting fees, building costs, utilities and administrative expenses that are related to developing new products, enhancing existing products, validating new and enhanced products, managing clinical, regulatory and medical affairs are expensed as incurred.

Income Taxes

The Company calculates income tax expense for each jurisdiction in which it operates. This involves estimating actual current taxes due plus assessing temporary differences arising from differing treatment for tax and accounting purposes that are recorded as deferred tax assets and liabilities. The Company periodically evaluates deferred tax assets, capital loss carryforwards and tax credit carryforwards to determine their recoverability based primarily on the Company's ability to generate future taxable income and capital gains. Where it is more-likely-than-not these will not be recovered, the Company estimates a valuation allowance and records a corresponding additional tax expense in the consolidated statement of operations.

The Company recognizes and measures uncertain tax positions taken or expected to be taken in a tax return utilizing a two-step approach. The Company first determines if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is that the Company measures the tax benefit as the largest amount that is more likely than not to be realized upon ultimate settlement. The Company recognizes interest and penalties related to uncertain tax positions in the provision for income taxes on the consolidated statements of operations.

Stock-Based CompensationStock-based compensation expense reflects the fair value of stock-based awards measured at the grant date and recognized over the relevant service period. The expense recognized includes the impact of forfeitures as they occur. The Company estimates the fair value of each stock-based award on the measurement date using either the current market price of the stock, the Black-Scholes option valuation model, or the Monte Carlo Simulation valuation model. The Black-Scholes and Monte Carlo Simulation valuation models incorporate assumptions as to stock price volatility, the expected life of options or restricted stock units, a risk-free interest rate and dividend yield. The Company recognizes stock-based compensation expense related to options, restricted stock units and market based performance stock units on a straight-line basis over the service period of the award, which is generally 4 years for options and restricted stock units and 3 years for market based performance stock units.

Foreign Currency Translation

The functional currency of the Company's foreign subsidiaries is the local currency in which the subsidiary operates. For foreign operations where the local currency is considered to be the functional currency, the Company translates assets and liabilities into U.S. dollars at the exchange rate on the balance sheet date. The Company translates income and expense items at average rates of exchange prevailing during each period. The Company accumulates translation adjustments in accumulated other comprehensive loss, a component of stockholders’ equity.

Transaction gains or losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other expense in the statements of operations as incurred.

Derivative Financial Instruments

The Company is exposed to market risks, including changes in foreign currency and interest rates. The Company periodically enters into certain derivative financial instruments to hedge the underlying economic exposure.

Derivative instruments are presented in the consolidated financial statements at their fair value. Changes in the fair value of derivative financial instruments are either recognized periodically in income or in stockholders’ equity as a component of accumulated other comprehensive income (loss) depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value or cash flow hedge. Generally, the changes in the fair value of derivatives accounted for as fair value hedges are recorded in income along with the portions of the changes in the fair value of hedged items that relate to the hedged risks. Changes in the fair value of derivatives accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in accumulated other comprehensive income (loss). There were no derivative instruments held by the Company as of May 31, 2021 and 2020.

Contingencies

The Company is subject to various legal proceedings that arise in the ordinary course of business, including patent infringement and product liability matters. The Company records accruals for contingencies when it is probable the liability has been incurred and the amount can be reasonably estimated. Legal fees are expensed as incurred. Insurance recoveries related to potential claims are recognized up to the amount of the recorded liability when coverage is confirmed and the estimated recoveries are probable of payment. These recoveries are not netted against the related liabilities for financial statement presentation.

The following table provides a description of recent accounting pronouncements that may have a material effect on the Company's consolidated financial statements:

Recently Issued Accounting Pronouncements - Adopted
Standard	Description	Date Adopted	Effect on the Consolidated Financial Statements
ASU 2018-13, Fair Value Measurement (Topic 820)	This ASU removes, modifies and adds various disclosure requirements related to fair value disclosures. Disclosures related to transfers between fair value hierarchy levels will be removed and further detail around changes in unrealized gains and losses for the period and unobservable inputs used in determining level 3 fair value measurements will be added, among other changes.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.

Recently Issued Accounting Pronouncements - Not Yet Applicable or Adopted

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Acquisitions

12 Months Ended

May 31, 2021

Business Combinations [Abstract]

Acquisitions

ACQUISITIONS

C3 Wave Tip Location Acquisition

On December 17, 2019, the Company acquired the C3 Wave tip location asset from Medical Components Inc.("MedComp") for an aggregate purchase price of $10.0 million with $5.0 million of potential future contingent consideration related to technical milestones. This acquisition filled a gap in the Vascular Access portfolio and supports the Company's strategic plan. The Company accounted for this acquisition as an asset purchase. The Company recorded the amount paid at closing as inventory of $0.6 million and intangible assets of a trademark of $0.9 million and product technology of $8.5 million. The intangible assets will be amortized over 15 years. The contingent consideration is comprised of technical milestones and will be accounted for when the contingency is resolved or becomes probable and reasonably estimable.

Eximo Acquisition

On October 2, 2019, the Company entered into a share purchase agreement to acquire Eximo Medical, Ltd., a pre-commercial stage medical device company with a proprietary 355nm laser atherectomy technology. The aggregate purchase price of $60.7 million included an upfront payment of $45.8 million and contingent consideration with an estimated fair value of $14.9 million. This acquisition expanded and complemented the Company’s Endovascular Therapies product portfolio by adding the 355nm laser atherectomy technology (Auryon) which treats Peripheral Artery Disease.

The Company accounted for the Eximo acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is non-deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of Eximo products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the Eximo acquisition, which are included in "acquisition, restructuring and other items, net" in the accompanying Consolidated Statements of Operations, were approximately $0.6 million in fiscal year 2020. The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	50
Inventory	150
Prepaid and other current assets	54
Long-term deposits	51
Property, plant and equipment	397
Intangible assets:
Product technology	60,300
Goodwill	11,427
Total assets acquired	$	72,429
Liabilities assumed
Accounts payable	$	84
Other current liabilities	615
Deferred tax liabilities	11,070
Total liabilities assumed	$	11,769
Net assets acquired	$	60,660

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2020.

The value assigned to the product technology was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. The product technology is deemed to have a useful life of fifteen years and will be amortized on a straight-line basis over the useful life.

The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

RadiaDyne Acquisition

On September 21, 2018, the Company acquired RadiaDyne, a privately held medical diagnostic and device company that designs and develops patient dose monitoring technology to improve cancer treatment outcomes. The aggregate purchase price of $75.0 million included an upfront payment of $47.9 million, contingent consideration with an estimated fair value of $22.3 million, an indemnification holdback of $4.6 million and a purchase price holdback of $0.2 million. The fair value of contingent consideration of $22.3 million was comprised of $16.5 million for the revenue milestones and $5.8 million for the technical milestones. The indemnification holdback was recorded in accrued liabilities at May 31, 2020 and was released during fiscal year 2021.

This acquisition expanded the Company’s growing Oncology business by adding RadiaDyne’s oncology solutions, including the IsoLoc/ImmobiLoc and Alatus balloon stabilizing technologies.

The Company accounted for the RadiaDyne acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of RadiaDyne products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the RadiaDyne acquisition, which are included in "acquisition, restructuring and other items, net" in the accompanying Consolidated Statements of Operations, were approximately $1.6 million in fiscal year 2019. The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	900
Inventory	732
Prepaid and other current assets	98
Property, plant and equipment	133
Intangible assets:
RadiaDyne trademark	400
OARtrac trademark	200
RadiaDyne legacy product technology	1,500
OARtrac product technology	18,900
RadiaDyne customer relationships	4,600
Goodwill	47,982
Total assets acquired	$	75,445
Liabilities assumed
Accounts payable	$	352
Accrued expenses	106
Total liabilities assumed	$	458
Net assets acquired	$	74,987

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2019.

The values assigned to the RadiaDyne and OARtrac trademark and product technologies were derived using the relief-from-royalties method under the income approach. This approach is used to estimate the cost savings that accrue for the owner of an intangible asset who would otherwise have to pay royalties or licensing fees on revenues earned through the use of the asset if they had not owned the rights to use the assets. The net after-tax royalty savings are calculated for each year in the remaining economic life of the intangible asset and discounted to present value. The trademarks were deemed to have a useful life of five to seven years and the product technologies were deemed to have a useful life of seven to ten years. Both are amortized on a straight-line basis over their useful life.

The value assigned to customer relationships was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. Customer relationships are amortized on a straight-line basis over fifteen years.

The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The impairment charge is recorded in "Acquisition, restructuring and other items, net", on the Consolidated Statement of Operations (see Note 19). At May 31, 2021, the fair value of the contingent liability for RadiaDyne is zero (see Note 5).

BioSentry Acquisition

On August 14, 2018, the Company acquired the BioSentry product from Surgical Specialties, LLC (“SSC”), for an aggregate purchase price of $39.8 million of which $37.0 million was paid on August 14, 2018 and $2.8 million was recorded as contingent consideration. The contingent consideration liability was recorded at fair value and was paid in the fourth quarter of fiscal year 2019 upon fulfillment of hydrogel orders by SSC.

The Company accounted for the BioSentry acquisition under the acquisition method of accounting for business combinations. Accordingly, the cost to acquire the assets was allocated to the underlying net assets in proportion to estimates of their respective fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. Goodwill is deductible for income tax purposes.

The Company has not disclosed the amount of revenue and earnings for sales of BioSentry products since acquisition, nor proforma information, because these amounts are not significant to the Company's financial statements. Acquisition-related costs associated with the BioSentry acquisition, which are included in acquisition, restructuring and other expenses, net in the accompanying Consolidated Statements of Operations, were approximately $1.0 million in fiscal year 2019. The following table summarizes the final purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Inventory	$	50
Property, plant and equipment	10
Intangible assets:
BioSentry trademark	2,500
BioSentry product technology	20,900
Customer relationships	2,600
Goodwill	13,740
Net assets acquired	$	39,800

The Company finalized the allocation of the purchase price to the assets acquired and liabilities assumed in the fourth quarter of fiscal year 2019.

The values assigned to the BioSentry trademark and product technologies were derived using the relief-from-royalties method under the income approach. This approach is used to estimate the cost savings that accrue for the owner of an intangible asset who would otherwise have to pay royalties or licensing fees on revenues earned through the use of the asset if they had not owned the rights to use the assets. The net after-tax royalty savings are calculated for each year in the remaining economic life of the intangible asset and discounted to present value. The trademark and product technologies are deemed to have a fifteen year useful life and are amortized on a straight-line basis over their useful life.

The value assigned to customer relationships was derived using the multi-period excess earnings method under the income approach. This approach estimates the excess earnings generated over the lives of the customers that existed as of the acquisition date and discounts such earnings to present value. Customer relationships are amortized on a straight-line basis over ten years.

The goodwill arising from the acquisition consists largely of synergies and economies of scale the Company hopes to achieve from combining the acquired assets with the Company's current operations.

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Divestitures

12 Months Ended

May 31, 2021

Discontinued Operations and Disposal Groups [Abstract]

DIVESTITURES

DIVESTITURES    

Fluid Management

On May 31, 2019, the Company completed the sale of the NAMIC Fluid Management business (the “Divestiture”) and all of the assets used primarily in connection with the Fluid Management business to Medline Industries, Inc. (“Medline”) pursuant to an asset purchase agreement dated April 17, 2019 (the “Asset Purchase Agreement”). Total consideration received by the Company for the Divestiture in the fourth quarter of fiscal year 2019 was $169.2 million in cash and resulted in a gain of $46.6 million after working capital adjustments of $0.6 million. The gain is recorded in discontinued operations. On June 3, 2019, a portion of the net proceeds were used to retire the outstanding balance on the Term Loan and Revolving Facility and the remaining net proceeds will continue to be invested in the business.

Pursuant to a transition services agreement entered into and effective on the closing of the transaction, the Company supplied certain services to Medline. Medline received certain legal, human resource, tax, accounting and information technology services from the Company which ended in the fourth quarter of fiscal year 2021.

As a result of the Divestiture, the results of operations from the Fluid Management business are reported in the accompanying consolidated statements of operations as “Income from discontinued operations, net of income tax” for the year ended May 31, 2019.

The following table summarizes the financial results of discontinued operations:

(in thousands)	May 31, 2019
Net sales	$	88,850
Cost of sales (exclusive of amortization)	52,978
Gross profit	35,872
Operating expenses
Research and development	1,177
Sales and marketing	4,129
General and administrative	271
Amortization of intangibles	2,716
Total operating expenses	8,293
Operating income	27,579
Gain on divestiture	46,592
Income from discontinued operations before income taxes	74,171
Income tax expense	(1,685)
Income from discontinued operations	$	72,486

In accordance with GAAP, only expenses specifically identifiable and related to a business to be disposed may be allocated to discontinued operations. As such, the selling and marketing, research and development and general and administrative expenses recorded in discontinued operations include corporate costs incurred directly in support of the Fluid Management portfolio.

The Company applied the “Intraperiod Tax Allocation” rules under ASC 740, which requires the allocation of an entity’s total annual income tax provision among continuing operations and, in the Company’s case, discontinued operations. Included in the $1.6 million income tax expense for fiscal year 2019 is $0.6 million tax expense related to the gain on the Divestiture. The taxes on the gain were calculated using various state statutory tax rates and are partially offset by the utilization of historical state net operating losses. There are no current federal taxes on the gain due to utilization of historical net operating losses which had a corresponding valuation allowance.

The table below provides a reconciliation of the gain recorded on the sale of the Fluid Management business:

(in thousands)
Proceeds received from Divestiture	$	169,242
Working capital adjustment	(612)
Fluid Management assets:
Inventories	11,029
Property, plant and equipment, net	16,624
Intangible assets, net	15,047
Goodwill	75,308
Total Fluid Management assets	118,008
Transaction costs for Divestiture (1)	4,030
Gain on sale of the Fluid Management business before income taxes	$	46,592

(1) Costs include advisory fees, legal fees and professional fees

Proceeds from the sale of Fluid Management have been presented in the Consolidated Statements of Cash Flows under investing activities for the fiscal year ended May 31, 2019.  Total operating and investing cash flows of discontinued operations for the fiscal year ended May 31, 2019 is comprised of the following, which exclude the effect of income taxes:

(in thousands)	2019
Net cash provided by operating activities	$	2,245
Net cash provided by investing activities	982

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Revenue from Contracts with Customers

12 Months Ended

May 31, 2021

Revenue from Contract with Customer [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

REVENUE FROM CONTRACTS WITH CUSTOMERS

Revenue Recognition

Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company has one primary revenue stream which is the sales of its products.

Disaggregation of Revenue

The following tables summarize net product revenue by Global Business Unit and geography for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31, 2021						Year ended May 31, 2020
(in thousands)	United States		International		Total		United States		International		Total
Net sales
Endovascular Therapies	$	121,427	$	13,652	$	135,079	$	98,965	$	13,741	$	112,706
Vascular Access	81,088		20,222		101,310		76,768		17,531		94,299
Oncology	34,528		20,093		54,621		32,247		24,905		57,152
Total	$	237,043	$	53,967	$	291,010	$	207,980	$	56,177	$	264,157

	Year ended May 31, 2019
(in thousands)	United States		International		Total
Net sales
Endovascular Therapies	$	106,767	$	13,134	$	119,901
Vascular Access	79,611		15,119		94,730
Oncology	30,579		25,424		56,003
Total	$	216,957	$	53,677	$	270,634

Net Product Revenue

The Company's products consist of a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and for use in oncology and surgical settings. The Company's devices are generally used in minimally invasive, image-guided procedures. Most of the Company's products are intended to be used once and then discarded, or they may be implanted for short or long term use. The Company sells its products to its distributors and to end users, such as interventional radiologists, interventional cardiologists, vascular surgeons, urologists, interventional and surgical oncologists and critical care nurses.

Contracts and Performance Obligations

The Company contracts with its customers based on customer purchase orders, which in many cases are governed by master purchasing agreements. The Company’s contracts with customers are generally for product only, and do not include other performance obligations such as services or other material rights. As part of its assessment of each contract, the Company evaluates certain factors including the customer’s ability to pay (or credit risk). For each contract, the Company considers the promise to transfer products, each of which is distinct, to be the identified performance obligations.

Transaction Price and Allocation to Performance Obligations

Transaction prices of products are typically based on contracted rates. Product revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products to a customer, net of any variable consideration as described below.

If a contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the estimated relative standalone selling prices of the promised products underlying each performance obligation. The Company has standard pricing for its products and determines standalone selling prices based on the price at which the performance obligation is sold separately.

Revenue Recognition

Revenue is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which occurs at a point in time, and may be upon shipment from the Company’s manufacturing site or delivery to the customer’s named location, based on the contractual shipping terms of a contract.

In determining whether control has transferred, the Company considers if there is a present right to payment from the customer and when physical possession, legal title and risks and rewards of ownership have transferred to the customer.

The Company typically invoices customers upon satisfaction of identified performance obligations. As the Company’s standard payment terms are 30 to 90 days from invoicing, the Company does not provide any significant financing to its customers.

The Company enters into agreements to place placement and evaluation units (“units”) at customer sites, but the Company retains title to the units. The duration of these agreements are typically a year and the customer has the right to use the unit at no upfront charge in connection with the customer’s ongoing purchase of disposables. These types of agreements include an embedded operating lease for the right to use the units. In these arrangements, revenue recognized for the sale of the disposables is not allocated between the disposal revenue and lease revenue due to the insignificant value of the units in relation to the total agreement value.

Sales, value added, and other taxes collected on behalf of third parties are excluded from revenue.

Variable Consideration

Reserves: Revenue from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established for discounts, returns, rebates and allowances that are offered within contracts between the Company and its customers. These reserves are based on the amounts earned or to be claimed on the related sales and are classified as a contra asset.

Rebates and Allowances: The Company provides certain customers with rebates and allowances that are explicitly stated in the Company’s contracts and are recorded as a reduction of revenue in the period the related product revenue is recognized. The Company establishes reserves for such amounts, which is included in accrued expenses in the accompanying consolidated balance sheets. These rebates and allowances result from performance-based offers that are primarily based on attaining contractually specified sales volumes and administrative fees the Company is required to pay to group purchasing organizations.

Product Returns: The Company generally offers customers a limited right of return. Product returns after 30 days must be pre-approved by the Company and customers may be subject to a 20% restocking charge. To be accepted, a returned product must be unadulterated, undamaged and have at least twelve months remaining prior to its expiration date. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The Company currently estimates product return liabilities using its historical product return information and considers other factors that it believes could significantly impact its expected returns, including product recalls. During the year ended May 31, 2021, such product returns were not material.

Contract Balances with Customers

A receivable is generally recognized in the period the Company ships the product. Payment terms on invoiced amounts are based on contractual terms with each customer and generally coincide with revenue recognition. Accordingly, the Company does not have any contract assets associated with the future right to invoice its customers. In some cases, if control of the product has not yet transferred to the customer or the timing of the payments made by the customer precedes the Company’s fulfillment of the performance obligation, the Company recognizes a contract liability that is included in deferred revenue in the accompanying consolidated balance sheets.

The following table presents changes in the Company’s receivables, contract assets and contract liabilities with customers:

(in thousands)	May 31, 2021		May 31, 2020
Receivables	$	35,405	$	31,263
Contract assets	$	—	$	—
Contract liabilities	$	426	$	545

During the years ended May 31, 2021 and 2020, the Company had additions to contract liabilities of $1.0 million and $2.1 million, respectively. This was offset by $1.2 million and $2.2 million in revenue that was recognized during the years ended May 31, 2021 and 2020, respectively.

Costs to Obtain or Fulfill a Customer Contract

Under ASC 606, the Company recognizes an asset for incremental costs of obtaining a contract with a customer if it expects to recover those costs. The Company’s sales incentive compensation plans qualify for capitalization since these plans are directly related to sales achieved during a period of time. However, the Company has elected the practical expedient under ASC 340-40-25-4 to expense the costs as they are incurred within selling and marketing expenses since the amortization period is less than one year.

The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill the promise to transfer the associated products. Shipping and handling costs, associated with the distribution of finished products to customers, are recorded in costs of goods sold and are recognized when the related finished product is shipped to the customer. Amounts charged to customers for shipping are recorded in net sales.

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Fair Value of Financial Instruments

12 Months Ended

May 31, 2021

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

FAIR VALUE OF FINANCIAL INSTRUMENTSOn a recurring basis, the Company measures certain financial assets and financial liabilities at fair value based upon quoted market prices, where available. Where quoted market prices or other observable inputs are not available, the Company applies valuation techniques to estimate fair value. FASB ASC Topic 820, Fair Value Measurements and Disclosures, establishes a three-level valuation hierarchy for disclosure of fair value measurements. The categorization of financial assets

and financial liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the measurement of fair value. The three levels of the hierarchy are defined as follows:

•Level 1 - Inputs to the valuation methodology are quoted market prices for identical assets or liabilities.

•Level 2 - Inputs to the valuation methodology are other observable inputs, including quoted market prices for similar assets or liabilities and market-corroborated inputs.

•Level 3 - Inputs to the valuation methodology are unobservable inputs based on management’s best estimate of inputs market participants would use in pricing the asset or liability at the measurement date, including assumptions about risk.

The Company's financial instruments include cash and cash equivalents, marketable securities, accounts receivable, accounts payable and contingent consideration. The carrying amount of cash and cash equivalents, accounts receivable, and accounts payable approximates fair value due to their immediate or short-term maturities. The recurring fair value measurements using significant unobservable inputs (Level 3) relate to contingent consideration liabilities.

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis:

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2021
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,741	$	15,741
Total Financial Liabilities	$	—	$	—	$	15,741	$	15,741

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2020
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,647	$	15,647
Total Financial Liabilities	$	—	$	—	$	15,647	$	15,647

There were no transfers in and out of Level 1, 2 and 3 measurements for the years ended May 31, 2021 and 2020.

The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2021:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2020	$	15,647
Change in present value of contingent consideration (1)	89
Currency (gain) loss from remeasurement	5
Balance at May 31, 2021	$	15,741

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2020:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2019	$	13,486
Contingent consideration liabilities recorded as a result of the acquisitions (Note 2)	14,900
Change in fair value of contingent consideration (1)	(11,531)
Contingent consideration payments	(1,208)
Balance at May 31, 2020	$	15,647

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

During fiscal year 2020, the Company revised the sales projections for RadiaDyne products as a result of reviews performed by executive management. The adjustments to the sales projections over the contractual earn-out period resulted in a $9.2 million reduction in the fair value of the contingent liability. It was also determined that one of the technical milestones would not be achieved, which resulted in an additional reduction in the liability of $2.7 million. At May 31, 2021, there are no remaining amounts payable for the RadiaDyne contingent consideration.

Contingent Liability for Acquisition Earn Outs

Some of the Company's business combinations involve the potential for the payment of future contingent consideration upon the achievement of certain product development milestones or various other performance conditions. Payment of the additional consideration is generally contingent on the acquired company reaching certain performance milestones, including attaining specified revenue levels or product development targets. Contingent consideration is recorded at the estimated fair value of the contingent payments on the acquisition date. The fair value of the contingent consideration is remeasured at the estimated fair value at each reporting period with the change in fair value recognized as income or expense within change in fair value of contingent consideration in the consolidated statements of income.

The Company measures the initial liability and remeasures the liability on a recurring basis using Level 3 inputs as defined under authoritative guidance for fair value measurements which is determined using a discounted cash flow model applied to projected net sales, using probabilities of achieving projected net sales and projected payment dates. Projected net sales are based on internal projections and extensive analysis of the target market and the sales potential. Increases or decreases in any valuation inputs in isolation may result in a significantly lower or higher fair value measurement in the future.

The recurring Level 3 fair value measurements of the contingent consideration liabilities include the following significant unobservable inputs as of May 31, 2021:

(in thousands)	Fair Value		Valuation Technique	Unobservable Input	Range
Revenue based payments	$	15,741	Discounted cash flow	Discount rate	5%
				Probability of payment	66% - 100%
				Projected fiscal year of payment	2024 - 2025

At May 31, 2021, the amount of undiscounted future contingent consideration that the Company expects to pay as a result of all completed acquisitions is approximately $20.0 million. The milestones, including revenue projections and technical milestones, associated with the contingent consideration must be reached in future periods ranging from fiscal years 2021 to 2025 in order for the associated consideration to be paid.

Items Measured at Fair Value on a Nonrecurring Basis

During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The Company recorded a goodwill impairment charge of $158.6 million as of May 31, 2020 to write down the carrying value of the reporting unit to fair value using Level 3 inputs.

There were no other items measured at fair value on a nonrecurring basis during the year ended May 31, 2020 or May 31, 2021.

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Inventories

12 Months Ended

May 31, 2021

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories are stated at lower of cost and net realizable value (using the first-in, first-out method). Inventories consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Raw materials	$	22,925	$	23,308
Work in process	8,022		8,318
Finished goods	17,667		28,279
Total	$	48,614	$	59,905

The Company periodically reviews its inventory for both obsolescence and loss of value. The Company makes assumptions about the future demand for and market value of the inventory. Based on these assumptions, the Company estimates the amount of obsolete, expiring and slow moving inventory. The total inventory reserve at May 31, 2021 and 2020 was $3.8 million and $4.7 million, respectively.

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Prepaid Expenses and Other

12 Months Ended

May 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

PREPAID EXPENSES AND OTHER

PREPAID EXPENSES AND OTHER

Prepaid expenses and other consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Deposits	$	2,795	$	689
Employee Retention Tax Credit	1,911		—
Software licenses	1,286		1,002
TSA receivable	2		2,911
License fees	166		203
Trade shows	132		296
Rent	268		246
Other prepaid taxes	379		414
Other	1,760		1,549
Total	$	8,699	$	7,310

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Property, Plant and Equipment, Net

12 Months Ended

May 31, 2021

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT, NET

PROPERTY, PLANT AND EQUIPMENT, NET

Property, plant and equipment are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Building and building improvements	$	28,979	$	27,119
Computer software and equipment	26,302		24,730
Machinery and equipment	14,208		13,602
Placement and evaluation units	9,530		—
Construction in progress	3,217		3,050
	82,236		68,501
Less accumulated depreciation	(45,635)		(40,661)
	36,601		27,840
Land and land improvements	472		472
	$	37,073	$	28,312

Depreciation expense for fiscal years 2021, 2020 and 2019 was $5.7 million, $3.3 million and $3.1 million, respectively.

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Goodwill and Intangible Assets

12 Months Ended

May 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS

Goodwill

Goodwill is not amortized, but rather, is tested for impairment annually or more frequently if impairment indicators arise. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination.

The Company's annual testing for impairment of goodwill was completed as of December 31, 2020. The Company operates as a single operating segment with one reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. The Company determines the fair value of the reporting unit based on the market valuation approach and concluded that it was not more-likely-than-not that the fair value of the Company's reporting unit was less than its carrying value.

Even though the Company determined that there was no goodwill impairment as of December 31, 2020, the future occurrence of a potential indicator of impairment, such as a significant adverse change in legal, regulatory, business or economic conditions or a more-likely-than-not expectation that the reporting unit or a significant portion of the reporting unit will be sold or disposed of, would require an interim assessment for the reporting unit prior to the next required annual assessment as of December 31, 2021.

There were no adjustments to goodwill for the year ended May 31, 2021 other than foreign currency translation adjustments. For the year ended May 31, 2020 the Company recorded a goodwill impairment charge of $158.6 million to write down the carrying value of the reporting unit to fair value.

Definite Lived Intangible Assets

Definite lived intangible assets consist primarily of product technologies and customer relationships and are amortized over their estimated useful lives, which range between two to eighteen years, on either a straight-line basis over the expected period of benefit or as revenues are earned from the sales of the related product. Amortization expense was $18.1 million, $18.1 million and $17.1 million for fiscal years 2021, 2020 and 2019, respectively. During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million. The impairment charge is recorded in "Acquisition, restructuring and other items, net", on the Consolidated Statement of Operations (see Note 19). There were no impairment charges on definite lived intangible assets for the years ended May 31, 2020 and 2019.

Intangible assets consisted of the following:

	May 31, 2021
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	236,907	$	(97,343)	$	139,564
Customer relationships	60,291		(34,164)		26,127
Trademarks	9,950		(6,905)		3,045
Licenses	6,087		(5,846)		241
	$	313,235	$	(144,258)	$	168,977

	May 31, 2020
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	251,569	$	(88,547)	$	163,022
Customer relationships	60,160		(30,018)		30,142
Trademarks	10,150		(6,691)		3,459
Licenses	6,087		(5,574)		513
	$	327,966	$	(130,830)	$	197,136

Expected future amortization expense related to the intangible assets for each of the following fiscal years is as follows:

(in thousands)
2022	$	15,156
2023	15,595
2024	14,111
2025	15,131
2024	16,138
2025 and thereafter	92,846
	$	168,977

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Income Taxes

12 Months Ended

May 31, 2021

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The components of loss from continuing operations before income tax benefit are as follows:

	Year ended May 31,
(in thousands)	2021		2020		2019
Loss from continuing operations before tax expense:
U.S.	$	(31,595)	$	(166,984)	$	(15,593)
Non-U.S.	(4,457)		(1,151)		891
	$	(36,052)	$	(168,135)	$	(14,702)

Income tax benefit is comprised of the following:

	Year ended May 31,
(in thousands)	2021		2020		2019
Current
U.S.	100		96		128
Non U.S.	201		124		289
	301		220		417
Deferred
U.S.	(3,375)		(1,122)		(3,948)
Non U.S.	(1,430)		(446)		(25)
	(4,805)		(1,568)		(3,973)
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

Temporary differences that give rise to deferred tax assets and liabilities are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Deferred tax assets
Net operating loss carryforward	$	31,564	$	26,697
Stock-based compensation	3,556		2,923
Federal and state R&D tax credit carryforward	6,715		5,412
Inventories	884		1,071
Expenses incurred not currently deductible	3,091		1,927
Accrued liabilities	73		95
Gross deferred tax asset	45,883		38,125
Deferred tax liabilities
Depreciation and amortization	48,744		49,023
	48,744		49,023
Valuation allowance	(17,035)		(13,114)
Net deferred tax liability	$	(19,896)	$	(24,012)

The net deferred tax liability in the U.S. as of May 31, 2021 and 2020 principally relates to tax amortization of intangibles that have an indefinite reversal period for book purposes, also known as a “naked credit deferred tax liability”, that cannot be considered as a source of income to recover the deferred tax asset. In addition, during the fiscal year ended May 31, 2020 a net deferred tax liability of $11.0 million was recorded in purchase accounting related to the stock acquisition of Eximo Medical Ltd. primarily related to book intangibles offset by tax net operating losses.

The Company's U.S. Federal net operating loss carryforwards as of May 31, 2021 after considering IRC Section 382 limitations are $134.6 million. The expiration of the Federal net operating loss carryforwards are as follows: $8.6 million between 2022 and 2023, $79.4 million between 2028 and 2037 and $46.6 million indefinitely.

The Company's state net operating loss carryforwards as of May 31, 2021 after considering remaining IRC Section 382 limitations are $20.0 million which expire in various years from 2029 to 2041. The Company has Israel tax net operating losses of $13.5 million that can be carried forward indefinitely.

Beginning in 2018, except for the Global Intangible Low-Taxed Income, the Company will no longer record United States federal income tax on its share of the income of its foreign subsidiaries, nor will it record a benefit for foreign tax credits related to that income. Upon distribution of these earnings in the form of dividends or otherwise, the Company would be subject to withholding taxes payable, where applicable, to foreign countries, but would have no further federal income tax liability. The Company intends to indefinitely reinvest the unremitted foreign earnings of all other subsidiaries as of May 31, 2021, as well as all subsequent earnings generated by all of our foreign subsidiaries. Determining the amount of unrecognized deferred tax liability related to any additional outside basis difference in these entities is not practical.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Evidence the Company considered included its history of net operating losses, which resulted in the Company recording a full valuation allowance for its deferred tax assets in fiscal year 2016, except the naked credit deferred tax liability.

Based on the review of all available evidence, the Company determined that it has not yet attained a sustained level of profitability and the objectively verifiable negative evidence outweighed the positive evidence. Therefore, the Company has provided a valuation allowance on its federal and state net operating loss carryforwards, federal and state R&D credit carryforwards and other net deferred tax assets that have a limited life and are not supportable by the naked credit deferred tax liability sourced income as of May 31, 2021. The Company will continue to assess the level of the valuation allowance required. If sufficient positive evidence exists in future periods to support a release of some or all of the valuation allowance, such a release would likely have a material impact on the Company’s results of operations.

The Company's consolidated income tax expense has differed from the amount that would be provided by applying the U.S. Federal statutory income tax rate to the Company's income before income taxes for the following reasons:

	Year ended May 31,
(in thousands)	2021		2020		2019
Income tax benefit at federal statutory tax rate of 21.0%, 21.0% and 28.6%, respectively	$	(7,571)	$	(35,308)	$	(3,087)
State income taxes, net of Federal tax benefit	(462)		(40)		(177)
Impact of Non-U.S. operations	(293)		(100)		76
Research and development tax credit	(1,303)		(1,152)		(936)
Meals and entertainment	116		171		190
Goodwill impairment	—		33,301		—
Change in valuation allowance	3,921		1,426		175
Effect of elimination of stock compensation APIC pool	526		162		—
Other	562		192		203
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

During fiscal year 2020, the Company recorded a goodwill impairment of $158.6 million. The Company has made the tax accounting policy election to first allocate the impairment to the Company’s nondeductible goodwill based on the Company’s pre-impairment nondeductible goodwill balance.

The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits:

	Year ended May 31,
(in thousands)	2021		2020		2019
Unrecognized tax benefits balance at June 1	$	464	$	464	$	464
Decrease in gross amounts of tax positions related to prior years due to U.S. tax reform	—		—		—
Decrease due to lapse in statute of limitations	—		—		—
Unrecognized tax benefits balance at May 31	$	464	$	464	$	464

The table above includes unrecognized tax benefits associated with the calculation of limitations placed on the utilization of tax attributes related to an acquired company. If recognized, $0.5 million would result in adjustments to other tax accounts.  

The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. There are no accrued interest and penalties recognized in the consolidated balance sheet as of May 31, 2021 and May 31, 2020.

The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to examination by taxing authorities throughout the world. Fiscal years 2018 through 2020 remain open to examination by the various tax authorities.

The Company does not anticipate that the amount of unrecognized tax benefits will significantly change in the next twelve months.

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Accrued Liabilities

12 Months Ended

May 31, 2021

Payables and Accruals [Abstract]

ACCRUED LIABILITIES

ACCRUED LIABILITIES

Accrued liabilities consist of the following:

(in thousands)	May 31, 2021		May 31, 2020
Payroll and related expenses	$	20,408	$	13,059
Outside services	4,256		2,222
Royalties	2,663		2,392
Accrued severance	548		794
Sales and franchise taxes	631		634
Litigation matters	975		—
Indemnification holdback	—		5,000
Other	5,978		5,279
Total	$	35,459	$	29,380

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Long Term Debt

12 Months Ended

May 31, 2021

Debt Disclosure [Abstract]

Long Term Debt

LONG-TERM DEBT

On June 3, 2019 and in connection with the completion of the Fluid Management divestiture, the Company repaid all amounts outstanding under its existing Credit Agreement and entered into a new Credit Agreement with the lenders party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and Bank of America, N.A. and KeyBank National Association, as co-syndication agents.

The Credit Agreement provides for a $125.0 million secured revolving credit facility (the “Revolving Facility”), which includes an uncommitted expansion feature that allows the Company to increase the total revolving commitments and/or add new tranches of term loans in an aggregate amount not to exceed $75.0 million.  The proceeds may be used to refinance certain existing indebtedness of the Company and its subsidiaries, to finance the working capital needs, and for general corporate purposes (including permitted acquisitions), of the Company and its subsidiaries.

The Credit Agreement has a five year maturity. Interest on the facility is based, at the Company’s option, on either a base rate of LIBOR or alternate base rate, plus an applicable margin tied to the Company’s total leverage ratio and having ranges between 0.25% and 0.75% for base rate loans and between 1.25% and 1.75% for LIBOR loans. After default, the interest rate may be increased by 2.0%. The facility also carries a commitment fee of 0.20% to 0.25% per annum on the unused portion.

The Company's obligations under the Revolving Facility are unconditionally guaranteed, jointly and severally, by the Company's material direct and indirect domestic subsidiaries (the “Guarantors”). All obligations of the Company and the Guarantors under the Revolving Facility are secured by first priority security interests in substantially all of the assets of the Company and the Guarantors.

The Credit Agreement includes customary representations, warranties and covenants, and acceleration, indemnity and events of default provisions, including, among other things, two quarterly financial covenants as follows: 

•Maximum leverage ratio of consolidated total indebtedness* to consolidated EBITDA* of not greater than 3.00 to 1.00 (during certain periods following material acquisitions the ratio shall be increased to 3.50 to 1.00).

•Fixed charge coverage ratio of consolidated EBITDA minus consolidated capital expenditures* to consolidated interest expense* paid or payable in cash plus scheduled principal payments in respect of indebtedness under the Credit Agreement of not less than 1.25 to 1.00.

* The definitions of consolidated total indebtedness, consolidated EBITDA, consolidated capital expenditures and consolidated interest expense are specifically defined in the credit agreement included as an exhibit to Form 8-K filed on June 6, 2019.

As of May 31, 2021 there was $20.0 million outstanding on the Revolving Facility. As of May 31, 2021 and May 31, 2020, the carrying value of long-term debt approximated its fair market value.

The interest rate on the Revolving Facility at May 31, 2021 was 1.36%.

The Company was in compliance with the Credit Agreement covenants as of May 31, 2021.

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Retirement Plans	12 Months Ended
	May 31, 2021
Retirement Benefits [Abstract]
RETIREMENT PLANS	RETIREMENT PLANSThe Company has a 401(k) plan under which eligible employees can defer a portion of their compensation, part of which is matched by the Company. Matching contributions were $3.8 million, $3.2 million and $3.6 million in 2021, 2020 and 2019, respectively. There are also various immaterial foreign retirement plans.

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Stockholders' Equity

12 Months Ended

May 31, 2021

Equity [Abstract]

STOCKHOLDERS' EQUITY

STOCKHOLDERS’ EQUITY

Capitalization

On October 29, 2014, the Board of Directors approved the Amended and Restated Certificate of Incorporation (the “Amended Certificate”). Under the Amended Certificate, the authorized capital stock is 80,000,000 shares, consisting of 75,000,000 shares of common stock, par value $.01 per share and 5,000,000 shares of preferred stock, par value $.01 per share.

The holders of common stock are entitled to one vote for each share held. Subject to preferences applicable to any outstanding shares of preferred stock, the holders of common stock are entitled to receive ratably dividends, if any, as may be declared by the Board of Directors out of funds legally available for dividend payments. If the Company liquidates, dissolves, or winds up, the holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities and liquidation preferences of any outstanding shares of preferred stock. Holders of common stock have no pre-emptive rights or rights to convert their common stock into any other securities. There are no redemption or sinking fund provisions applicable to the common stock. The rights, preferences and privileges of the holders of common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of preferred stock that the Company may designate in the future.

The Board of Directors has the authority to (i) issue the undesignated preferred stock in one or more series, (ii) determine the powers, preferences and rights and the qualifications, limitations or restrictions granted to or imposed upon any wholly un-issued series of undesignated preferred stock and (iii) fix the number of shares constituting any series and the designation of the series, without any further vote or action by the Company's stockholders.

Stock Options

On October 13, 2020, the Company's shareholders approved the 2020 Stock and Incentive Award Plan (the “2020 Plan”). The 2020 Plan provides for the grant of incentive stock options, non-statutory stock options, restricted stock, restricted stock units, stock appreciation rights, performance share units, performance shares and other incentive awards to the Company's employees, directors and other service providers. A total of 2.4 million shares of common stock have been reserved for issuance under the 2020 Plan.

Prior to the adoption of the 2020 Plan, equity awards were issued under the 2004 Stock and Incentive Award Plan (the “2004 Plan”). The adoption of the 2020 Plan did not impact the administration of equity awards issued under the 2004 Plan but following the adoption of the 2020 Plan, equity award grants are no longer made under the 2004 Plan.

As of May 31, 2021, there remained approximately 2.3 million shares available for granting under the 2020 Plan.

The following table summarizes information about stock option activity for the fiscal year ended May 31, 2021:

	Shares	Weighted average exercise price		Weighted average remaining contractual life	Aggregate intrinsic value (in thousands)
Outstanding at beginning of year - June 1, 2020	1,938,753	$	16.89
Granted	528,809	$	11.41
Exercised	(137,237)	$	16.45
Forfeited	(132,895)	$	18.38
Expired	(50,470)	$	12.33
Outstanding at end of year - May 31, 2021	2,146,960	$	15.59	6.24	$	16,176
Options exercisable at year-end	1,067,686	$	16.26	3.91	$	7,324
Options expected to vest in future periods	1,079,274	$	14.92	8.53	$	8,852

Stock options are granted at exercise prices equal to the quoted market price of common stock at the date of the grant. Options vest 25% per year over four years for employees. Stock options granted prior to May 1, 2007 and after June 1, 2017 expire on the tenth anniversary of the grant date. Stock options granted between May 1, 2007 through May 31, 2017 expire on the seventh anniversary of the grant date.

The Company measures the fair value of each stock option grant at the date of grant using a Black-Scholes option pricing model. The weighted average grant-date fair value of options granted during the years ended May 31, 2021, 2020 and 2019 was $3.97, $5.46, and $6.53, respectively. The following assumptions were used in arriving at the fair value of options granted during 2021, 2020 and 2019, respectively: risk-free interest rates of 0.34%, 1.63% and 2.78%; expected volatility of 39%, 31%, and 31%; and expected lives of 4.96 years, 4.91 years, and 4.79 years. The Company does not declare dividends therefore a dividend yield of zero was used for the years ended May 31, 2021, 2020 and 2019. Risk-free interest rates reflect the yield on zero-coupon U.S. Treasury bonds whose maturity period equals the expected term of the option. Expected volatilities are based on the historical volatility of the Company's stock. The expected option lives are based on historical experience of employee exercise behavior.

The total intrinsic value of options exercised during the years ended May 31, 2021, 2020 and 2019 was $0.8 million, $0.5 million, and $1.4 million, respectively. As of May 31, 2021, there was $3.9 million of total unrecognized compensation cost related to non-vested options, which is expected to be recognized over a weighted average period of 6 years.

Cash received from option exercises during 2021, 2020 and 2019 was $1.9 million, $0.6 million and $1.5 million, respectively. Due to the valuation allowance there was no tax benefit realized from stock option exercises during the years ended May 31, 2021, 2020 and 2019.

Restricted Stock Unit and Performance Share Awards

The Company grants restricted stock units to certain employees under the 2020 Plan, and historically under the 2004 Plan, which give the recipients the right to receive shares of Company stock upon vesting. The restricted stock unit awards vest in four equal annual installments beginning on the first anniversary of the grant date. Restricted stock unit awards granted to directors vest over one year. Unvested restricted stock unit awards will be forfeited if the recipient ceases to be employed by the Company.

 The following table summarizes information about restricted stock unit activity for the year ended May 31, 2021:

	Restricted Stock Units	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	464,921	$	19.65
Granted	533,708	$	10.40
Vested	(205,202)	$	10.02
Canceled	(31,324)	$	17.30
Non-vested at end of year, May 31, 2021	762,103	$	13.28

The fair value of each restricted stock unit is the market price of Company stock on the date of grant. The weighted average grant date fair value of restricted stock units granted during the years ended May 31, 2021, 2020 and 2019 was $10.40, $20.35 and $20.87, respectively. The total intrinsic value of restricted stock units (meaning the fair value of the units on the date of vest) vesting during the years ended May 31, 2021, 2020 and 2019 was $2.1 million, $3.9 million, and $4.6 million, respectively. As of May 31, 2021, there was $6.5 million of total unrecognized compensation cost related to non-vested restricted stock awards, which is expected to be recognized over a weighted average period of 3 years.

The Company grants performance share awards to certain employees under the 2020 Plan, and historically under the 2004 Plan, which gives the recipients the right to receive shares of Company stock if certain criteria is met.

 The following table summarizes information about performance unit award activity for the year ended May 31, 2021:

	Performance Unit Awards	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	273,121	$	22.07
Granted	232,236	$	9.72
Vested	—	$	—
Canceled	(129,066)	$	21.28
Non-vested at end of year, May 31, 2021	376,291	$	14.72

During fiscal year 2021 and 2020, the Company granted performance unit awards. Performance unit awards subject to vesting are based on the Company's level of attainment of the performance targets which are set for each of the three

performance years along with continued employment of the grantee. At the end of the three year period, the vested shares are subject to modification based on the Company’s TSR targets relative to the percentage appreciation of a specified index of companies for the respective three-year period.

During fiscal year 2019, the Company granted performance unit awards that include a three-year market condition. Vesting of the performance unit awards is based on the Company's level of attainment of specified TSR targets relative to the percentage appreciation of a specified index of companies for the respective three-year periods. It is also subject to the continued employment of the grantees.

In order to estimate the fair value of such awards, a Monte Carlo Simulation valuation model on the date of the grant was used. For the years ended May 31, 2021, 2020 and 2019, the weighted average grant date fair market value for new grants was $9.72, $14.06 and $28.62, respectively. Compensation cost is recognized over the performance period which is typically three years. As of May 31, 2021, there was $2.1 million of unrecognized compensation cost which is expected to be recognized over a weighted average period of 2 years.

Compensation Expense

The following tables represents the break out of share-based compensation included in the Company's consolidated statement of operations:

	Year ended May 31,
(in thousands)	2021		2020		2019
Cost of sales	$	768	$	655	$	461
Research and development	1,152		971		724
Sales and marketing	1,641		1,665		1,952
General and administrative	5,064		4,301		6,112
	$	8,625	$	7,592	$	9,249

The income tax benefit on the compensation expense recognized for all share-based compensation arrangements was $2.0 million, $1.7 million and $2.1 million for the years ended May 31, 2021, 2020 and 2019, respectively. The income tax benefit for 2021, 2020 and 2019 are negated by the full valuation allowance recorded against the deferred tax assets.

Employee Stock Purchase Plan

The Employee Stock Purchase Plan (the “Stock Purchase Plan”) provides a means by which employees (the “participants”) are given an opportunity to purchase the Company's common stock through payroll deductions. A total of 4,000,000 shares of common stock have been reserved for issuance under the Stock Purchase Plan. Shares are offered through two purchase periods, each with duration of approximately 6 months, commencing on the first business day of the first and third fiscal quarters. An employee is eligible to participate in an offering period if, on the first day of an offering period, he or she has been employed in a full-time capacity for at least six months, with a customary working schedule of 20 or more hours per week and more than five months in a calendar year. Employees who own stock possessing 5% or more of the total combined voting power or value of all classes of stock are not eligible to participate in the Stock Purchase Plan. The purchase price of the shares of common stock acquired on each purchase date will be the lower of (i) 85% of the fair market value of a share of common stock on the first day of the offering period or (ii) 85% of the fair market value of a share of common stock on the last day of the purchase period, subject to adjustments made by the Board of Directors. The Stock Purchase Plan is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Internal Revenue Code. During the years ended May 31, 2017, 2019 and 2021, an additional 500,000, 1,000,000 and 500,000 shares of the Company's common stock, respectively, were reserved for issuance under the Stock Purchase Plan.

The Company uses the Black-Scholes option-pricing model to calculate the purchase date fair value of the shares issued under the Stock Purchase Plan and recognize expense related to shares purchased ratably over the offering period. During the years ended May 31, 2021, 2020 and 2019, 164,194, 100,567 and 72,863 shares, respectively, were issued at an average price of $7.95, $12.11 and $16.08, respectively, under the Stock Purchase Plan. As of May 31, 2021, 2.4 million shares remained available for future purchases under the Stock Purchase Plan.

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Earnings Per Share

12 Months Ended

May 31, 2021

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHAREBasic earnings per share are based on the weighted average number of common shares outstanding. In addition, diluted earnings per share include the dilutive effect of potential common stock consisting of stock options, restricted stock units and performance stock units, provided that the inclusion of such securities is not anti-dilutive. In periods with a net loss, stock

options and restricted stock units are not included in the computation of basic loss per share as the impact would be anti-dilutive.

The following table reconciles basic to diluted weighted average shares outstanding for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31,
	2021	2020	2019
Basic	38,342,476	37,961,224	37,484,573
Effect of dilutive securities	—	—	—
Diluted	38,342,476	37,961,224	37,484,573
Securities excluded as their inclusion would be anti-dilutive	3,285,354	2,581,006	2,200,318

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Leases Leases

12 Months Ended

May 31, 2021

Leases [Abstract]

Leases

LEASES

Adoption of ASU No. 2016-02, Leases (Topic 842)

On June 1, 2019, the Company adopted ASU No. 2016-02 using the modified retrospective approach. This ASU increases transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about leasing arrangements. Comparative periods prior to adoption have not been retrospectively adjusted.

The Company elected the three practical expedients that permit an entity to a) not reassess whether expired or existing contracts contain leases, b) not reassess lease classification for existing or expired leases, and c) not consider whether previously capitalized initial direct costs would be appropriate under the new standard. Further, the Company has elected to not recognize leases with terms of 12 months or less on the balance sheet, and elected to account for lease and non-lease components as a single component for certain classes of assets.

The adoption of this standard resulted in the recording of an additional lease asset and lease liability of approximately $5.6 million. The standard did not have a material impact on the Company's Consolidated Statement of Operations, Stockholders Equity or Cash Flows.

Leases

The Company determines if an arrangement is a lease at inception of the contract. The Company has operating leases for buildings, primarily for office space, R&D, manufacturing and warehousing.

Operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. Many of the lease agreements contain renewal or termination clauses that are factored into the determination of the lease term if it is reasonably certain that these options would be exercised. The Company recognizes lease expense for these leases on a straight-line basis over the lease term.

The following table presents supplemental balance sheet information related to leases:

(in thousands)	Balance Sheet Location	May 31, 2021		May 31, 2020
Assets
Operating lease ROU asset	Other assets	$	9,382	$	10,146
Liabilities
Current operating lease liabilities	Other current liabilities	2,415		2,077
Non-current operating lease liabilities	Other long-term liabilities	7,319		8,345
Total lease liabilities		$	9,734	$	10,422

The interest rate implicit in lease agreements is typically not readily determinable, and as such the Company used the incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The incremental borrowing rate is defined as the interest the Company would pay to borrow on a collateralized basis, considering factors such as length of lease term. The following table presents the weighted average remaining lease term and discount rate:

	May 31, 2021		May 31, 2020
Weighted average remaining term (in years)	4.12		5.00
Weighted average discount rate	3.8	%	4.2	%

The maturities of the lease liabilities for each of the following fiscal years is:

(in thousands)	May 31, 2021
2021	$	2,735
2022	2,787
2023	2,209
2024	1,454
2025	1,148
2026 and thereafter	171
Total lease payments	$	10,504
Less: Imputed Interest	770
Total lease obligations	$	9,734
Less: Current portion of lease obligations	2,415
Long-term lease obligations	$	7,319

During the years ended May 31, 2021 and May 31, 2020, the Company recognized operating lease expense which includes immaterial short-term leases of $3.2 million and $3.4 million, respectively. Rent expense prior to adoption of ASC 842 amounted to $2.5 million for the year ended May 31, 2019.

As of May 31, 2021 and 2020, the expenses on the Consolidated Statement of Operations were classified as follows:

(in thousands)	May 31, 2021		May 31, 2020
Cost of sales	$	820	$	1,138
Research and development	857		583
Sales and marketing	407		397
General and administrative	1,123		1,233
	$	3,207	$	3,351

The following table presents supplemental cash flow and other information related to leases for the year ended May 31, 2021 and 2020:

(in thousands)	May 31, 2021		May 31, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	2,698	$	2,372
ROU assets obtained in exchange for lease liabilities
Operating leases	1,585		6,918

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Commitments and Contingencies

12 Months Ended

May 31, 2021

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Other Commitments and Contingencies

The following table summarizes the Company's other future commitments and contingencies as of May 31, 2021:

(in thousands)	Total		2022		2023		2024		2025		2026 and thereafter
Purchase obligations (1)	$	4,697	$	4,697	$	—	$	—	$	—	$	—
Royalties (2)	47,700		3,800		3,800		3,800		3,800		32,500
	$	52,397	$	8,497	$	3,800	$	3,800	$	3,800	$	32,500

(1) The non-cancelable inventory purchase obligations are not reflected on the consolidated balance sheets under accounting principles generally accepted in the United States of America.

(2) These are future minimum royalty payments.

Legal Proceedings

The Company is involved in various legal proceedings, including commercial, intellectual property, product liability, and regulatory matters of a nature considered normal for its business. The Company accrues for amounts related to these matters if it is probable that a liability has been incurred, and an amount can be reasonably estimated. The Company discloses such matters when there is at least a reasonable possibility that a material loss may have been incurred. However, the Company cannot predict the outcome of any litigation or the potential for future litigation.

C.R. Bard, Inc. v. AngioDynamics, Inc.

On January 11, 2012, C.R. Bard, Inc. (“Bard”) filed a suit in the United States District Court of Utah claiming certain of the Company's implantable port products infringe on three U.S. patents held by Bard (US Patent Nos. 7,785,302, 7,959,615 (“615”) and 7,947,022). The case was stayed pending reexamination in the US Patent and Trademark Office ("USPTO"). Following the reexamination proceedings, and the parties’ related appeals to the Federal Circuit which resulted in further proceedings at the USPTO, certain claims of the 615 patent were held invalid, while the remaining claims of the 615 patent and the other two patents were upheld over the prior art references considered in the reexamination proceedings. Thereafter, the case was transferred from the District of Utah to the United States District Court for the District of Delaware (“District of Delaware”). A scheduling order was entered on March 23, 2021. The Company filed a Motion to Amend its Answer and Counterclaims on April 14, 2021. This motion seeks to add counterclaims for infringement of U.S. Patent Nos. 9,168,365; 9,895,523; and 10,632,295, as well as a counterclaim of inequitable conduct, and remains pending. The Company served its initial invalidity contentions on July 2, 2021, consistent with the scheduling order. The Company believes these claims are without merit and intends to defend them vigorously. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

On March 10, 2015, Bard and Bard Peripheral Vascular filed suit in the District of Delaware claiming certain of the Company's implantable port products infringe on three U.S. patents held by Bard (US Patent Nos. 8,475,417, 8,545,460, 8,805,478). The case proceeded through trial which began on March 4, 2019. On day four of the jury trial, at the close of Bard’s case, the Court granted the Company's oral motion for judgment as a matter of law as well as its motions for summary judgment on the grounds that the asserted patents are invalid, ineligible, not infringed and not willfully infringed. On May 10, 2019, the Company filed a motion for attorney fees and non-taxable expenses under 35 USC Sec. 285. Bard appealed the judgment to the Federal Circuit and on November 10, 2020, the Federal Circuit reversed the judgment in part with respect to Section 101, and vacated and remanded the trial court’s invalidity and non-infringement judgments. The Company filed a combined Petition for rehearing and rehearing en banc on December 10, 2020, which was denied on January 15, 2021. The Federal Circuit issued its mandate on January 22, 2021. On March 15, 2021, the District of Delaware entered an order requiring the parties to submit status reports and denied as moot the Company’s motion for attorney’s fees and expenses. The parties submitted status reports on March 29, 2021. The matter remains pending. The Company maintains its belief that Bard’s claims are without merit. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

On March 8, 2021, Bard filed suit in the District of Delaware asserting certain of the Company’s port products (including certain related infusion sets) infringe U.S. Patent Nos. 8,025,639, 9,603,992 (“992”) and 9,603,993 (“993”). On May 20, 2021, the Company filed a Motion to Dismiss Bard’s claims with respect to the 992 and 993 patents, and the motion remains pending. The Company maintains its belief that Bard’s claims are without merit. The Company has not recorded an expense related to the outcome of this litigation because it is not yet possible to determine if a potential loss is probable nor reasonably estimable.

AngioDynamics, Inc. v. C.R. Bard, Inc.

On May 30, 2017, the Company commenced an action in the United States District Court for the Northern District of New York entitled AngioDynamics, Inc. v. C.R. Bard, Inc. and Bard Access Systems, Inc. (“Bard”). In this action, the Company alleges that Bard has illegally tied the sales of its tip location systems to the sales of its PICCs. The Company alleges that this practice violates the federal antitrust laws and has had, and continues to have, an anti-competitive effect in the market for PICCs. The Company seeks both monetary damages and injunctive relief. Bard moved to dismiss on September 8, 2017. On August 6, 2018 the court denied Bard’s motion in its entirety. Bard made a motion for summary judgment which was denied in its entirety in a decision issued by the Court on May 5, 2021. Bard also raised a series of challenges targeted at one of AngioDynamics’ expert witnesses, which the Court denied in part and granted in part in decisions on May 5, 2021 and June 11, 2021. Discovery is largely complete, and the case is expected to proceed to trial in 2022.

Merz North America SettlementOn May 16, 2019, Merz North America, Inc. (“Merz”) commenced an action in the United States District Court for the Southern District of New York entitled Merz North America, Inc. v. AngioDynamics, Inc. In this action, Merz alleged breach of contract against AngioDynamics based on a March 1, 2016 Distribution Agreement. On June 28, 2019, AngioDynamics reached a settlement with Merz. AngioDynamics made a lump-sum payment of $2.5 million to Merz in return for dismissal of the case with prejudice during the first quarter of fiscal year 2020. The case was subsequently dismissed.

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Segments and Geographic Information

12 Months Ended

May 31, 2021

Segment Reporting [Abstract]

SEGMENTS AND GEOGRAPHIC INFORMATION

SEGMENTS AND GEOGRAPHIC INFORMATION

Segment information

The Company considers its business to be a single segment entity related to the development, manufacture and sale on a global basis of medical devices for vascular access, surgery, peripheral vascular disease and oncology. The Company's chief operating decision maker (CEO) evaluates the various global product portfolios on a net sales basis. Executives reporting in to the CEO include those responsible for operations and supply chain management, research and development, sales, franchise marketing and certain corporate functions. The CEO evaluates profitability, investment and cash flow metrics on a consolidated worldwide basis due to shared infrastructure and resources.

Total sales by product category are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Product Category
Endovascular Therapies	$	135,079	$	112,706	$	119,901
Vascular Access	101,310		94,299		94,730
Oncology/Surgery	54,621		57,152		56,003
Total	$	291,010	$	264,157	$	270,634

Geographic information

Total sales for geographic areas are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Geography
United States	$	237,043	$	207,980	$	216,957
International	53,967		56,177		53,677
Total	$	291,010	$	264,157	$	270,634

For fiscal years 2021, 2020 and 2019, international sales as a percentage of total net sales were 19%, 21% and 20%, respectively. Sales to any one country outside the U.S., as determined by shipment destination, did not comprise a material portion of net sales in any of the last three fiscal years. In addition, no one customer represents more than 10% of consolidated net sales. 99% of long-lived assets are located within the United States.

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Acquisition, Restructuring and Other Items, net

12 Months Ended

May 31, 2021

Restructuring and Related Activities [Abstract]

ACQUISITION, RESTRUCTURING AND OTHER ITEMS, NET

ACQUISITION, RESTRUCTURING AND OTHER ITEMS, NETAcquisition, restructuring and other items, net consisted of:

	Year ended May 31,
(in thousands)	2021		2020		2019
Legal (1)	$	6,161	$	2,666	$	7,802
Mergers and acquisitions (2)	1		782		4,030
Transition service agreement (3)	(1,032)		(1,799)		—
Divestiture (4)	393		2,809		—
Intangible and other asset impairment (5)	13,953		—		1,704
Restructuring	—		26		289
Other	756		1,530		1,302
Total	$	20,232	$	6,014	$	15,127

(1) Legal expenses related to litigation that is outside the normal course of business.

(2) Mergers and acquisitions expenses related to investment banking, legal and due diligence.

(3) Transition services agreement that was entered into as a result of the sale of the Fluid Management business.

(4) Divestiture expenses incurred to transition manufacturing from Glens Falls, NY to Queensbury, NY.

(5) During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million

Included in legal for fiscal year 2021, is a $1.0 million settlement expense. Included in legal for fiscal years 2020 and 2019 are settlements received for the Biolitec litigation of $0.5 million and $3.4 million, respectively. The settlement received partially offsets legal expenses paid related to the settlement proceedings. In addition, the $2.5 million accrual for the settlement of the Merz contract termination is included in legal expenses for fiscal year 2019.

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

May 31, 2021

Equity [Abstract]

ACCUMULATED OTHER COMPREHESIVE INCOME (LOSS)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Changes in each component of accumulated other comprehensive income (loss), net of tax, are as follows for fiscal years 2021 and 2020:

(in thousands)	Foreign currency translation gain (loss)
Balance at May 31, 2019	$	(1,352)
Other comprehensive income before reclassifications, net of tax	11
Net other comprehensive income	$	11
Balance at May 31, 2020	$	(1,341)
Other comprehensive income (loss) before reclassifications, net of tax	4,494
Net other comprehensive loss	$	4,494
Balance at May 31, 2021	$	3,153

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Valuation and Qualifying Accounts

12 Months Ended

May 31, 2021

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

VALUATION AND QUALIFYING ACCOUNTS

(in thousands)	SCHEDULE II -VALUATION AND QUALIFYING  ACCOUNTS
Description	Balance at Beginning of Year		Additions - Charged to costs and expenses		Deductions		Balance at End of Period
Year Ended May 31, 2019
Allowance for deferred tax asset	$	26,607	$	—	$	(14,919)	$	11,688
Allowance for sales returns and doubtful accounts	$	2,466	$	393	$	(953)	$	1,906
Year Ended May 31, 2020
Allowance for deferred tax asset	$	11,688	$	1,426	$	—	$	13,114
Allowance for sales returns and doubtful accounts	$	1,906	$	1,218	$	(974)	$	2,150
Year Ended May 31, 2021
Allowance for deferred tax asset	$	13,114	$	3,921	$	—	$	17,035
Allowance for sales returns and doubtful accounts	$	2,150	$	1,833	$	(2,064)	$	1,919

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Basis of Presentation, Business Description and Summary of Significant Accounting Policies (Policies)

12 Months Ended

May 31, 2021

Accounting Policies [Abstract]

Basis of Presentation and Description of Business

Basis of Presentation and Description of Business

The consolidated financial statements include the accounts of AngioDynamics, Inc. and its wholly owned subsidiaries, (collectively, "us", "we", or the “Company”).

The Company designs, manufactures and sells a wide range of medical, surgical and diagnostic devices used by professional healthcare providers for vascular access, for the treatment of peripheral vascular disease and in oncology and surgical settings. The devices are generally used in minimally invasive, image-guided procedures. Most of the Company's products are intended to be used once and then discarded, or they may be temporarily implanted for short- or long-term use.

On May 31, 2019, the Company completed the sale of the Fluid Management business and all of the assets used primarily in connection with the Fluid Management business (Note 3). As the disposal of this business represents a strategic shift with a major effect on the Company's operations, for all periods presented in the Consolidated Statements of Operations and Comprehensive Income, all sales, costs, expenses, gains and income taxes attributable to Fluid Management have been reported under the captions, “Income from Discontinued Operations, Net of Income Tax.”  Cash flows used in or provided by Fluid Management have been reported in the Consolidated Statements of Cash Flows under operating and investing activities.

Accounting Principles

The consolidated financial statements and accompanying notes have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP").

Principles of Consolidation

The consolidated financial statements include the accounts of AngioDynamics and its subsidiaries (all of which are wholly owned). All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of consolidated financial statements, in conformity with accounting principles generally accepted in the United States of America, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Estimates also affect reported amounts of sales and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents

Cash and Cash Equivalents

The Company considers all unrestricted highly liquid investments with an initial maturity of less than three months at the date of purchase to be cash equivalents. The Company maintains cash and cash equivalent balances with financial institutions in the United States in excess of amounts insured by the Federal Deposit Insurance Corporation.

Fair Value Instruments

Fair Value Instruments

The carrying amount of the Company's cash and cash equivalents, accounts receivable, accounts payable and long-term debt approximates fair value due to the short-term nature or market interest rates of these items. The Company bases the fair value of short-term investments on quoted market prices or other relevant information generated by market transactions involving identical or comparable assets. The Company measures and records derivative financial instruments at fair value. See Note 5 for further discussion of financial instruments that are carried at fair value on a recurring and nonrecurring basis.

Accounts Receivable

Accounts Receivable

Accounts receivable, principally trade receivables, are generally due within 30 to 90 days and are stated at amounts due from customers, net of an allowance for estimated sales returns and doubtful accounts. The Company performs ongoing credit evaluations of customers and adjusts credit limits based upon payment history and the customer’s current creditworthiness, as determined by a review of their current credit information. The Company continuously monitors aging reports, collections and payments from customers, and a provision for estimated credit losses is maintained based upon historical experience and any specific customer collection issues that have been identified. While such credit losses have historically been within expectations

and the provisions established, the Company cannot guarantee that the same credit loss rates will be experienced in the future. The Company writes off accounts receivable when they are determined to be uncollectible.

Inventories

Inventories

Inventories are stated at the lower of cost or net realizable value based on the first-in, first-out cost method and consist of raw materials, work in process and finished goods. The standard cost of finished goods and work-in-process inventory is composed of material, labor and manufacturing overhead, which approximates actual cost. In addition to stating inventory at the lower of cost or net realizable value, we also evaluate inventory each reporting period for excess quantities and obsolescence, establishing reserves when necessary based upon historical experience, assessment of economic conditions and expected demand. Once recorded, these reserves are considered permanent adjustments to the carrying value of inventory An increase to inventory reserves results in a corresponding increase in cost of revenue. Inventories are written off against the reserve when they are physically disposed.

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Placement and evaluation units represent capital equipment placed at customer locations under placement or evaluation agreements for which depreciation expense is included in cost of sales on the Consolidation Statements of Operations. Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	3 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

The Company evaluates property, plant and equipment for impairment periodically to determine if changes in circumstances or the occurrence of events suggest the carrying value of the asset or asset group may not be recoverable. Expenditures for repairs and maintenance are charged to expense as incurred. Renewals and betterments are capitalized.

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Intangible assets other than goodwill, indefinite lived intangible assets and in process research and development ("IP R&D") are amortized over their estimated useful lives, which range between two to eighteen years, on either a straight-line basis over the expected period of benefit or as revenue is earned from the sales of the related product. The Company periodically reviews the estimated useful lives of intangible assets and reviews such assets or asset groups for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Such conditions could include significant adverse changes in the business climate, current-period operating or cash flow losses, significant declines in forecasted operations, or a current expectation that an asset group will be disposed of before the end of its useful life. When testing for impairment of definite-lived intangible assets held for use, the Company groups assets at the lowest level for which cash flows are separately identifiable. The Company operates as a single asset group. If a triggering event is deemed to exist, the Company performs an undiscounted operating cash flow analysis to determine if an impairment exists. If an intangible asset is considered to be impaired, the amount of the impairment will equal the excess of the carrying value over the fair value of the asset.

Goodwill and other intangible assets that have indefinite useful lives are not amortized, but rather, are tested for impairment annually or more frequently if impairment indicators arise. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination. Goodwill and intangible assets have been recorded at either incurred or allocated cost. Allocated costs were based on respective fair market values at the date of acquisition.

For goodwill, the impairment test requires a comparison of the estimated fair value of the reporting unit to which the goodwill is assigned to the carrying value of the assets and liabilities of that reporting unit. The determination of reporting units also requires management judgment. The Company considers whether a reporting unit exists within a reportable segment based on the availability of discrete financial information. The Company operates as a single operating segment with one reporting unit and consequently evaluates goodwill for impairment based on an evaluation of the fair value of the Company as a whole. If the carrying value of the reporting unit exceeds the fair value of the reporting unit, the carrying value is reduced to its fair value through an adjustment to the goodwill balance, resulting in an impairment charge.

Contingent Consideration

Contingent Consideration

The fair value of the liability for contingent consideration recorded on the acquisition date for a business combination is based on probability weighted estimated cash flow streams, discounted back to present value using a discount rate determined in accordance with accepted valuation methods and reflective of the risk associated with the estimated cash flow streams. The liability for contingent consideration is remeasured to fair value at each reporting period with changes recorded in earnings until the contingency is resolved.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue when it transfers control of promised goods or services to its customers in an amount that reflects the consideration to which the Company expects to be entitled to in exchange for those goods and services. See Note 4, “Revenue from Contracts with Customers” for further discussion on revenue.

Research and Development

Research and Development

Research and development costs, including salaries, consulting fees, building costs, utilities and administrative expenses that are related to developing new products, enhancing existing products, validating new and enhanced products, managing clinical, regulatory and medical affairs are expensed as incurred.

Income Taxes

Income Taxes

The Company calculates income tax expense for each jurisdiction in which it operates. This involves estimating actual current taxes due plus assessing temporary differences arising from differing treatment for tax and accounting purposes that are recorded as deferred tax assets and liabilities. The Company periodically evaluates deferred tax assets, capital loss carryforwards and tax credit carryforwards to determine their recoverability based primarily on the Company's ability to generate future taxable income and capital gains. Where it is more-likely-than-not these will not be recovered, the Company estimates a valuation allowance and records a corresponding additional tax expense in the consolidated statement of operations.

The Company recognizes and measures uncertain tax positions taken or expected to be taken in a tax return utilizing a two-step approach. The Company first determines if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is that the Company measures the tax benefit as the largest amount that is more likely than not to be realized upon ultimate settlement. The Company recognizes interest and penalties related to uncertain tax positions in the provision for income taxes on the consolidated statements of operations.

Stock Based Compensation

Stock-Based CompensationStock-based compensation expense reflects the fair value of stock-based awards measured at the grant date and recognized over the relevant service period. The expense recognized includes the impact of forfeitures as they occur. The Company estimates the fair value of each stock-based award on the measurement date using either the current market price of the stock, the Black-Scholes option valuation model, or the Monte Carlo Simulation valuation model. The Black-Scholes and Monte Carlo Simulation valuation models incorporate assumptions as to stock price volatility, the expected life of options or restricted stock units, a risk-free interest rate and dividend yield. The Company recognizes stock-based compensation expense related to options, restricted stock units and market based performance stock units on a straight-line basis over the service period of the award, which is generally 4 years for options and restricted stock units and 3 years for market based performance stock units.

Foreign Currency Translation

Foreign Currency Translation

The functional currency of the Company's foreign subsidiaries is the local currency in which the subsidiary operates. For foreign operations where the local currency is considered to be the functional currency, the Company translates assets and liabilities into U.S. dollars at the exchange rate on the balance sheet date. The Company translates income and expense items at average rates of exchange prevailing during each period. The Company accumulates translation adjustments in accumulated other comprehensive loss, a component of stockholders’ equity.

Transaction gains or losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in other expense in the statements of operations as incurred.

Derivative Financial Instruments

Derivative Financial Instruments

The Company is exposed to market risks, including changes in foreign currency and interest rates. The Company periodically enters into certain derivative financial instruments to hedge the underlying economic exposure.

Derivative instruments are presented in the consolidated financial statements at their fair value. Changes in the fair value of derivative financial instruments are either recognized periodically in income or in stockholders’ equity as a component of accumulated other comprehensive income (loss) depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value or cash flow hedge. Generally, the changes in the fair value of derivatives accounted for as fair value hedges are recorded in income along with the portions of the changes in the fair value of hedged items that relate to the hedged risks. Changes in the fair value of derivatives accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in accumulated other comprehensive income (loss). There were no derivative instruments held by the Company as of May 31, 2021 and 2020.

Contingencies

Contingencies

The Company is subject to various legal proceedings that arise in the ordinary course of business, including patent infringement and product liability matters. The Company records accruals for contingencies when it is probable the liability has been incurred and the amount can be reasonably estimated. Legal fees are expensed as incurred. Insurance recoveries related to potential claims are recognized up to the amount of the recorded liability when coverage is confirmed and the estimated recoveries are probable of payment. These recoveries are not netted against the related liabilities for financial statement presentation.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

The following table provides a description of recent accounting pronouncements that may have a material effect on the Company's consolidated financial statements:

Recently Issued Accounting Pronouncements - Adopted
Standard	Description	Date Adopted	Effect on the Consolidated Financial Statements
ASU 2018-13, Fair Value Measurement (Topic 820)	This ASU removes, modifies and adds various disclosure requirements related to fair value disclosures. Disclosures related to transfers between fair value hierarchy levels will be removed and further detail around changes in unrealized gains and losses for the period and unobservable inputs used in determining level 3 fair value measurements will be added, among other changes.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.

Recently Issued Accounting Pronouncements - Not Yet Applicable or Adopted

There are no new accounting pronouncements issued that are expected to have a material impact on our consolidated financial statements.

Revenue from Contract with Customer

REVENUE FROM CONTRACTS WITH CUSTOMERS

Revenue Recognition

Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

Contracts and Performance Obligations

The Company contracts with its customers based on customer purchase orders, which in many cases are governed by master purchasing agreements. The Company’s contracts with customers are generally for product only, and do not include other performance obligations such as services or other material rights. As part of its assessment of each contract, the Company evaluates certain factors including the customer’s ability to pay (or credit risk). For each contract, the Company considers the promise to transfer products, each of which is distinct, to be the identified performance obligations.

Transaction Price and Allocation to Performance Obligations

Transaction prices of products are typically based on contracted rates. Product revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products to a customer, net of any variable consideration as described below.

If a contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the estimated relative standalone selling prices of the promised products underlying each performance obligation. The Company has standard pricing for its products and determines standalone selling prices based on the price at which the performance obligation is sold separately.

Revenue Recognition

Revenue is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which occurs at a point in time, and may be upon shipment from the Company’s manufacturing site or delivery to the customer’s named location, based on the contractual shipping terms of a contract.

In determining whether control has transferred, the Company considers if there is a present right to payment from the customer and when physical possession, legal title and risks and rewards of ownership have transferred to the customer.

The Company typically invoices customers upon satisfaction of identified performance obligations. As the Company’s standard payment terms are 30 to 90 days from invoicing, the Company does not provide any significant financing to its customers.

The Company enters into agreements to place placement and evaluation units (“units”) at customer sites, but the Company retains title to the units. The duration of these agreements are typically a year and the customer has the right to use the unit at no upfront charge in connection with the customer’s ongoing purchase of disposables. These types of agreements include an embedded operating lease for the right to use the units. In these arrangements, revenue recognized for the sale of the disposables is not allocated between the disposal revenue and lease revenue due to the insignificant value of the units in relation to the total agreement value.

Sales, value added, and other taxes collected on behalf of third parties are excluded from revenue.

Variable Consideration

Reserves: Revenue from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established for discounts, returns, rebates and allowances that are offered within contracts between the Company and its customers. These reserves are based on the amounts earned or to be claimed on the related sales and are classified as a contra asset.

Rebates and Allowances: The Company provides certain customers with rebates and allowances that are explicitly stated in the Company’s contracts and are recorded as a reduction of revenue in the period the related product revenue is recognized. The Company establishes reserves for such amounts, which is included in accrued expenses in the accompanying consolidated balance sheets. These rebates and allowances result from performance-based offers that are primarily based on attaining contractually specified sales volumes and administrative fees the Company is required to pay to group purchasing organizations.

Product Returns: The Company generally offers customers a limited right of return. Product returns after 30 days must be pre-approved by the Company and customers may be subject to a 20% restocking charge. To be accepted, a returned product must be unadulterated, undamaged and have at least twelve months remaining prior to its expiration date. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The Company currently estimates product return liabilities using its historical product return information and considers other factors that it believes could significantly impact its expected returns, including product recalls. During the year ended May 31, 2021, such product returns were not material.

Contract Balances with Customers

A receivable is generally recognized in the period the Company ships the product. Payment terms on invoiced amounts are based on contractual terms with each customer and generally coincide with revenue recognition. Accordingly, the Company does not have any contract assets associated with the future right to invoice its customers. In some cases, if control of the product has not yet transferred to the customer or the timing of the payments made by the customer precedes the Company’s fulfillment of the performance obligation, the Company recognizes a contract liability that is included in deferred revenue in the accompanying consolidated balance sheets.

Costs to Obtain or Fulfill a Customer Contract

Under ASC 606, the Company recognizes an asset for incremental costs of obtaining a contract with a customer if it expects to recover those costs. The Company’s sales incentive compensation plans qualify for capitalization since these plans are directly related to sales achieved during a period of time. However, the Company has elected the practical expedient under ASC 340-40-25-4 to expense the costs as they are incurred within selling and marketing expenses since the amortization period is less than one year.

The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill the promise to transfer the associated products. Shipping and handling costs, associated with the distribution of finished products to customers, are recorded in costs of goods sold and are recognized when the related finished product is shipped to the customer. Amounts charged to customers for shipping are recorded in net sales.

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Basis of Presentation, Business Description and Summary of Significant Accounting Policies (Tables)

12 Months Ended

May 31, 2021

Accounting Policies [Abstract]

Property, plant and equipment

Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	3 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

Property, plant and equipment are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Building and building improvements	$	28,979	$	27,119
Computer software and equipment	26,302		24,730
Machinery and equipment	14,208		13,602
Placement and evaluation units	9,530		—
Construction in progress	3,217		3,050
	82,236		68,501
Less accumulated depreciation	(45,635)		(40,661)
	36,601		27,840
Land and land improvements	472		472
	$	37,073	$	28,312

Recent accounting pronouncements

The following table provides a description of recent accounting pronouncements that may have a material effect on the Company's consolidated financial statements:

Recently Issued Accounting Pronouncements - Adopted
Standard	Description	Date Adopted	Effect on the Consolidated Financial Statements
ASU 2018-13, Fair Value Measurement (Topic 820)	This ASU removes, modifies and adds various disclosure requirements related to fair value disclosures. Disclosures related to transfers between fair value hierarchy levels will be removed and further detail around changes in unrealized gains and losses for the period and unobservable inputs used in determining level 3 fair value measurements will be added, among other changes.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This ASU replaces the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates.	June 1, 2020	The Company adopted the new standard in the first quarter of fiscal year 2021 and it did not have an impact on the Company's consolidated financial statements.

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Acquisitions (Tables)

12 Months Ended

May 31, 2021

Business Combinations [Abstract]

Schedule of estimated fair value of the assets acquired and liabilities assumed

The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	50
Inventory	150
Prepaid and other current assets	54
Long-term deposits	51
Property, plant and equipment	397
Intangible assets:
Product technology	60,300
Goodwill	11,427
Total assets acquired	$	72,429
Liabilities assumed
Accounts payable	$	84
Other current liabilities	615
Deferred tax liabilities	11,070
Total liabilities assumed	$	11,769
Net assets acquired	$	60,660

The following table summarizes the final aggregate purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Accounts receivable	$	900
Inventory	732
Prepaid and other current assets	98
Property, plant and equipment	133
Intangible assets:
RadiaDyne trademark	400
OARtrac trademark	200
RadiaDyne legacy product technology	1,500
OARtrac product technology	18,900
RadiaDyne customer relationships	4,600
Goodwill	47,982
Total assets acquired	$	75,445
Liabilities assumed
Accounts payable	$	352
Accrued expenses	106
Total liabilities assumed	$	458
Net assets acquired	$	74,987

The following table summarizes the final purchase price allocated to the net assets acquired:

(in thousands)	Final allocation
Inventory	$	50
Property, plant and equipment	10
Intangible assets:
BioSentry trademark	2,500
BioSentry product technology	20,900
Customer relationships	2,600
Goodwill	13,740
Net assets acquired	$	39,800

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Divestitures (Tables)

12 Months Ended

May 31, 2021

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations Disclosure

The following table summarizes the financial results of discontinued operations:

(in thousands)	May 31, 2019
Net sales	$	88,850
Cost of sales (exclusive of amortization)	52,978
Gross profit	35,872
Operating expenses
Research and development	1,177
Sales and marketing	4,129
General and administrative	271
Amortization of intangibles	2,716
Total operating expenses	8,293
Operating income	27,579
Gain on divestiture	46,592
Income from discontinued operations before income taxes	74,171
Income tax expense	(1,685)
Income from discontinued operations	$	72,486

The table below provides a reconciliation of the gain recorded on the sale of the Fluid Management business:

(in thousands)
Proceeds received from Divestiture	$	169,242
Working capital adjustment	(612)
Fluid Management assets:
Inventories	11,029
Property, plant and equipment, net	16,624
Intangible assets, net	15,047
Goodwill	75,308
Total Fluid Management assets	118,008
Transaction costs for Divestiture (1)	4,030
Gain on sale of the Fluid Management business before income taxes	$	46,592

(1) Costs include advisory fees, legal fees and professional fees

Proceeds from the sale of Fluid Management have been presented in the Consolidated Statements of Cash Flows under investing activities for the fiscal year ended May 31, 2019.  Total operating and investing cash flows of discontinued operations for the fiscal year ended May 31, 2019 is comprised of the following, which exclude the effect of income taxes:

(in thousands)	2019
Net cash provided by operating activities	$	2,245
Net cash provided by investing activities	982

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Revenue from Contracts with Customers (Tables)

12 Months Ended

May 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables summarize net product revenue by Global Business Unit and geography for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31, 2021						Year ended May 31, 2020
(in thousands)	United States		International		Total		United States		International		Total
Net sales
Endovascular Therapies	$	121,427	$	13,652	$	135,079	$	98,965	$	13,741	$	112,706
Vascular Access	81,088		20,222		101,310		76,768		17,531		94,299
Oncology	34,528		20,093		54,621		32,247		24,905		57,152
Total	$	237,043	$	53,967	$	291,010	$	207,980	$	56,177	$	264,157

	Year ended May 31, 2019
(in thousands)	United States		International		Total
Net sales
Endovascular Therapies	$	106,767	$	13,134	$	119,901
Vascular Access	79,611		15,119		94,730
Oncology	30,579		25,424		56,003
Total	$	216,957	$	53,677	$	270,634

Contract with Customer, Asset and Liability

The following table presents changes in the Company’s receivables, contract assets and contract liabilities with customers:

(in thousands)	May 31, 2021		May 31, 2020
Receivables	$	35,405	$	31,263
Contract assets	$	—	$	—
Contract liabilities	$	426	$	545

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Fair Value of Financial Instruments Fair Value of Financial Instruments (Tables)

12 Months Ended

May 31, 2021

Fair Value Disclosures [Abstract]

Fair value of assets and liabilities measured on recurring basis

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis:

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2021
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,741	$	15,741
Total Financial Liabilities	$	—	$	—	$	15,741	$	15,741

	Fair Value Measurements using inputs considered as:
(in thousands)	Level 1		Level 2		Level 3		Fair Value at May 31, 2020
Financial Liabilities
Contingent consideration for acquisition earn outs	$	—	$	—	$	15,647	$	15,647
Total Financial Liabilities	$	—	$	—	$	15,647	$	15,647

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2021:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2020	$	15,647
Change in present value of contingent consideration (1)	89
Currency (gain) loss from remeasurement	5
Balance at May 31, 2021	$	15,741

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

The table below presents the changes in fair value components of Level 3 instruments for the year ended May 31, 2020:

	Financial Liabilities
(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at May 31, 2019	$	13,486
Contingent consideration liabilities recorded as a result of the acquisitions (Note 2)	14,900
Change in fair value of contingent consideration (1)	(11,531)
Contingent consideration payments	(1,208)
Balance at May 31, 2020	$	15,647

(1) Change in the fair value of contingent consideration is included in earnings and comprised of changes in estimated earn out payments based on projections of Company performance and amortization of the present value discount.

Fair Value, Liabilities Measured on Recurring Basis

The recurring Level 3 fair value measurements of the contingent consideration liabilities include the following significant unobservable inputs as of May 31, 2021:

(in thousands)	Fair Value		Valuation Technique	Unobservable Input	Range
Revenue based payments	$	15,741	Discounted cash flow	Discount rate	5%
				Probability of payment	66% - 100%
				Projected fiscal year of payment	2024 - 2025

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Inventories (Tables)

12 Months Ended

May 31, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories are stated at lower of cost and net realizable value (using the first-in, first-out method). Inventories consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Raw materials	$	22,925	$	23,308
Work in process	8,022		8,318
Finished goods	17,667		28,279
Total	$	48,614	$	59,905

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Prepaid Expenses and Other (Tables)

12 Months Ended

May 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses and other

Prepaid expenses and other consisted of the following:

(in thousands)	May 31, 2021		May 31, 2020
Deposits	$	2,795	$	689
Employee Retention Tax Credit	1,911		—
Software licenses	1,286		1,002
TSA receivable	2		2,911
License fees	166		203
Trade shows	132		296
Rent	268		246
Other prepaid taxes	379		414
Other	1,760		1,549
Total	$	8,699	$	7,310

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Property, Plant and Equipment, Net (Tables)

12 Months Ended

May 31, 2021

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	3 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

Property, plant and equipment are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Building and building improvements	$	28,979	$	27,119
Computer software and equipment	26,302		24,730
Machinery and equipment	14,208		13,602
Placement and evaluation units	9,530		—
Construction in progress	3,217		3,050
	82,236		68,501
Less accumulated depreciation	(45,635)		(40,661)
	36,601		27,840
Land and land improvements	472		472
	$	37,073	$	28,312

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Goodwill and Intangible Assets (Tables)

12 Months Ended

May 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

Intangible assets consisted of the following:

	May 31, 2021
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	236,907	$	(97,343)	$	139,564
Customer relationships	60,291		(34,164)		26,127
Trademarks	9,950		(6,905)		3,045
Licenses	6,087		(5,846)		241
	$	313,235	$	(144,258)	$	168,977

	May 31, 2020
(in thousands)	Gross carrying value		Accumulated amortization		Net carrying value
Product technologies	$	251,569	$	(88,547)	$	163,022
Customer relationships	60,160		(30,018)		30,142
Trademarks	10,150		(6,691)		3,459
Licenses	6,087		(5,574)		513
	$	327,966	$	(130,830)	$	197,136

Expected amortization expense

Expected future amortization expense related to the intangible assets for each of the following fiscal years is as follows:

(in thousands)
2022	$	15,156
2023	15,595
2024	14,111
2025	15,131
2024	16,138
2025 and thereafter	92,846
	$	168,977

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Income Taxes (Tables)

12 Months Ended

May 31, 2021

Income Tax Disclosure [Abstract]

Components of income (loss) before income tax provision

The components of loss from continuing operations before income tax benefit are as follows:

	Year ended May 31,
(in thousands)	2021		2020		2019
Loss from continuing operations before tax expense:
U.S.	$	(31,595)	$	(166,984)	$	(15,593)
Non-U.S.	(4,457)		(1,151)		891
	$	(36,052)	$	(168,135)	$	(14,702)

Summary of Income tax (benefit) provision analyzed by category

Income tax benefit is comprised of the following:

	Year ended May 31,
(in thousands)	2021		2020		2019
Current
U.S.	100		96		128
Non U.S.	201		124		289
	301		220		417
Deferred
U.S.	(3,375)		(1,122)		(3,948)
Non U.S.	(1,430)		(446)		(25)
	(4,805)		(1,568)		(3,973)
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

Summary of deferred tax asset and liabilities

Temporary differences that give rise to deferred tax assets and liabilities are summarized as follows:

(in thousands)	May 31, 2021		May 31, 2020
Deferred tax assets
Net operating loss carryforward	$	31,564	$	26,697
Stock-based compensation	3,556		2,923
Federal and state R&D tax credit carryforward	6,715		5,412
Inventories	884		1,071
Expenses incurred not currently deductible	3,091		1,927
Accrued liabilities	73		95
Gross deferred tax asset	45,883		38,125
Deferred tax liabilities
Depreciation and amortization	48,744		49,023
	48,744		49,023
Valuation allowance	(17,035)		(13,114)
Net deferred tax liability	$	(19,896)	$	(24,012)

Summary of Income tax rate reconciliation

The Company's consolidated income tax expense has differed from the amount that would be provided by applying the U.S. Federal statutory income tax rate to the Company's income before income taxes for the following reasons:

	Year ended May 31,
(in thousands)	2021		2020		2019
Income tax benefit at federal statutory tax rate of 21.0%, 21.0% and 28.6%, respectively	$	(7,571)	$	(35,308)	$	(3,087)
State income taxes, net of Federal tax benefit	(462)		(40)		(177)
Impact of Non-U.S. operations	(293)		(100)		76
Research and development tax credit	(1,303)		(1,152)		(936)
Meals and entertainment	116		171		190
Goodwill impairment	—		33,301		—
Change in valuation allowance	3,921		1,426		175
Effect of elimination of stock compensation APIC pool	526		162		—
Other	562		192		203
Income tax benefit	$	(4,504)	$	(1,348)	$	(3,556)

Summary of unrecognized tax benefits reconciliation

The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits:

	Year ended May 31,
(in thousands)	2021		2020		2019
Unrecognized tax benefits balance at June 1	$	464	$	464	$	464
Decrease in gross amounts of tax positions related to prior years due to U.S. tax reform	—		—		—
Decrease due to lapse in statute of limitations	—		—		—
Unrecognized tax benefits balance at May 31	$	464	$	464	$	464

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Accrued Liabilities (Tables)

12 Months Ended

May 31, 2021

Payables and Accruals [Abstract]

Accrued liabilities

Accrued liabilities consist of the following:

(in thousands)	May 31, 2021		May 31, 2020
Payroll and related expenses	$	20,408	$	13,059
Outside services	4,256		2,222
Royalties	2,663		2,392
Accrued severance	548		794
Sales and franchise taxes	631		634
Litigation matters	975		—
Indemnification holdback	—		5,000
Other	5,978		5,279
Total	$	35,459	$	29,380

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Stockholders' Equity (Tables)

12 Months Ended

May 31, 2021

Equity [Abstract]

Schedule summarizes stock option activity

The following table summarizes information about stock option activity for the fiscal year ended May 31, 2021:

	Shares	Weighted average exercise price		Weighted average remaining contractual life	Aggregate intrinsic value (in thousands)
Outstanding at beginning of year - June 1, 2020	1,938,753	$	16.89
Granted	528,809	$	11.41
Exercised	(137,237)	$	16.45
Forfeited	(132,895)	$	18.38
Expired	(50,470)	$	12.33
Outstanding at end of year - May 31, 2021	2,146,960	$	15.59	6.24	$	16,176
Options exercisable at year-end	1,067,686	$	16.26	3.91	$	7,324
Options expected to vest in future periods	1,079,274	$	14.92	8.53	$	8,852

Share based compensation arrangement by share based payment award nonvested shares and weighted average grant date fair value

The following table summarizes information about restricted stock unit activity for the year ended May 31, 2021:

	Restricted Stock Units	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	464,921	$	19.65
Granted	533,708	$	10.40
Vested	(205,202)	$	10.02
Canceled	(31,324)	$	17.30
Non-vested at end of year, May 31, 2021	762,103	$	13.28

 The following table summarizes information about performance unit award activity for the year ended May 31, 2021:

	Performance Unit Awards	Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2020	273,121	$	22.07
Granted	232,236	$	9.72
Vested	—	$	—
Canceled	(129,066)	$	21.28
Non-vested at end of year, May 31, 2021	376,291	$	14.72

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following tables represents the break out of share-based compensation included in the Company's consolidated statement of operations:

	Year ended May 31,
(in thousands)	2021		2020		2019
Cost of sales	$	768	$	655	$	461
Research and development	1,152		971		724
Sales and marketing	1,641		1,665		1,952
General and administrative	5,064		4,301		6,112
	$	8,625	$	7,592	$	9,249

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Earnings Per Share (Tables)

12 Months Ended

May 31, 2021

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The following table reconciles basic to diluted weighted average shares outstanding for the years ended May 31, 2021, 2020 and 2019:

	Year ended May 31,
	2021	2020	2019
Basic	38,342,476	37,961,224	37,484,573
Effect of dilutive securities	—	—	—
Diluted	38,342,476	37,961,224	37,484,573
Securities excluded as their inclusion would be anti-dilutive	3,285,354	2,581,006	2,200,318

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Leases (Tables)

12 Months Ended

May 31, 2021

Leases [Abstract]

Supplemental balance sheet information

The following table presents supplemental balance sheet information related to leases:

(in thousands)	Balance Sheet Location	May 31, 2021		May 31, 2020
Assets
Operating lease ROU asset	Other assets	$	9,382	$	10,146
Liabilities
Current operating lease liabilities	Other current liabilities	2,415		2,077
Non-current operating lease liabilities	Other long-term liabilities	7,319		8,345
Total lease liabilities		$	9,734	$	10,422

Supplemental cash flow information

The following table presents the weighted average remaining lease term and discount rate:

	May 31, 2021		May 31, 2020
Weighted average remaining term (in years)	4.12		5.00
Weighted average discount rate	3.8	%	4.2	%

As of May 31, 2021 and 2020, the expenses on the Consolidated Statement of Operations were classified as follows:

(in thousands)	May 31, 2021		May 31, 2020
Cost of sales	$	820	$	1,138
Research and development	857		583
Sales and marketing	407		397
General and administrative	1,123		1,233
	$	3,207	$	3,351

The following table presents supplemental cash flow and other information related to leases for the year ended May 31, 2021 and 2020:

(in thousands)	May 31, 2021		May 31, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	2,698	$	2,372
ROU assets obtained in exchange for lease liabilities
Operating leases	1,585		6,918

Lease liability schedule

The maturities of the lease liabilities for each of the following fiscal years is:

(in thousands)	May 31, 2021
2021	$	2,735
2022	2,787
2023	2,209
2024	1,454
2025	1,148
2026 and thereafter	171
Total lease payments	$	10,504
Less: Imputed Interest	770
Total lease obligations	$	9,734
Less: Current portion of lease obligations	2,415
Long-term lease obligations	$	7,319

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Commitments And Contingencies (Tables)

12 Months Ended

May 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Other commitments and contingencies

The following table summarizes the Company's other future commitments and contingencies as of May 31, 2021:

(in thousands)	Total		2022		2023		2024		2025		2026 and thereafter
Purchase obligations (1)	$	4,697	$	4,697	$	—	$	—	$	—	$	—
Royalties (2)	47,700		3,800		3,800		3,800		3,800		32,500
	$	52,397	$	8,497	$	3,800	$	3,800	$	3,800	$	32,500

(1) The non-cancelable inventory purchase obligations are not reflected on the consolidated balance sheets under accounting principles generally accepted in the United States of America.

(2) These are future minimum royalty payments.

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Segments and Geographic Information (Tables)

12 Months Ended

May 31, 2021

Segment Reporting [Abstract]

Summary of total net sales by product category

Total sales by product category are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Product Category
Endovascular Therapies	$	135,079	$	112,706	$	119,901
Vascular Access	101,310		94,299		94,730
Oncology/Surgery	54,621		57,152		56,003
Total	$	291,010	$	264,157	$	270,634

Summary of net sales for geographic areas

Total sales for geographic areas are summarized below:

	Year ended May 31,
(in thousands)	2021		2020		2019
Net sales by Geography
United States	$	237,043	$	207,980	$	216,957
International	53,967		56,177		53,677
Total	$	291,010	$	264,157	$	270,634

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Acquisition, Restructuring and Other Items, net (Tables)

12 Months Ended

May 31, 2021

Restructuring and Related Activities [Abstract]

Acquisition, Restructuring and Other Items, net

Acquisition, restructuring and other items, net consisted of:

	Year ended May 31,
(in thousands)	2021		2020		2019
Legal (1)	$	6,161	$	2,666	$	7,802
Mergers and acquisitions (2)	1		782		4,030
Transition service agreement (3)	(1,032)		(1,799)		—
Divestiture (4)	393		2,809		—
Intangible and other asset impairment (5)	13,953		—		1,704
Restructuring	—		26		289
Other	756		1,530		1,302
Total	$	20,232	$	6,014	$	15,127

(1) Legal expenses related to litigation that is outside the normal course of business.

(2) Mergers and acquisitions expenses related to investment banking, legal and due diligence.

(3) Transition services agreement that was entered into as a result of the sale of the Fluid Management business.

(4) Divestiture expenses incurred to transition manufacturing from Glens Falls, NY to Queensbury, NY.

(5) During the fourth quarter of fiscal year 2021, the Company made the decision to abandon the OARtrac product technology and trademark. This resulted in an impairment charge of $14.0 million

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Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

May 31, 2021

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Changes in each component of accumulated other comprehensive income (loss), net of tax, are as follows for fiscal years 2021 and 2020:

(in thousands)	Foreign currency translation gain (loss)
Balance at May 31, 2019	$	(1,352)
Other comprehensive income before reclassifications, net of tax	11
Net other comprehensive income	$	11
Balance at May 31, 2020	$	(1,341)
Other comprehensive income (loss) before reclassifications, net of tax	4,494
Net other comprehensive loss	$	4,494
Balance at May 31, 2021	$	3,153

XML

Basis of Presentation, Business Description and Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	May 31, 2021 segment
Business Acquisition [Line Items]
Maturity period	less than three months
Number of reporting units	1
Number of operating segments	1
Employee Stock Option
Business Acquisition [Line Items]
Period of recognition for costs not yet recognized (years)	4 years
Restricted Stock
Business Acquisition [Line Items]
Period of recognition for costs not yet recognized (years)	3 years
Minimum
Business Acquisition [Line Items]
Accounts receivables period due	30 days
Estimated useful life of intangible assets other than goodwill (years)	2 years
Maximum
Business Acquisition [Line Items]
Accounts receivables period due	90 days
Estimated useful life of intangible assets other than goodwill (years)	18 years
Building and building improvements | Minimum
Business Acquisition [Line Items]
Useful life (years)	4 years
Building and building improvements | Maximum
Business Acquisition [Line Items]
Useful life (years)	39 years
Computer software and equipment | Minimum
Business Acquisition [Line Items]
Useful life (years)	3 years
Computer software and equipment | Maximum
Business Acquisition [Line Items]
Useful life (years)	5 years
Machinery and equipment | Minimum
Business Acquisition [Line Items]
Useful life (years)	5 years
Machinery and equipment | Maximum
Business Acquisition [Line Items]
Useful life (years)	8 years
Placement and evaluation units
Business Acquisition [Line Items]
Useful life (years)	5 years

XML

Acquisitions - Narrative (Details) - USD ($) $ in Thousands					12 Months Ended
	Dec. 17, 2019	Oct. 02, 2019	Sep. 21, 2018	Aug. 14, 2018	May 31, 2021	May 31, 2020	May 31, 2019
Business Acquisition [Line Items]
Other long-term liabilities					$ 8,701	$ 9,029
Accrued liabilities					$ 35,459	29,380
C3 Wave Tip Location Asset
Business Acquisition [Line Items]
Aggregate purchase price	$ 10,000
Contingent consideration for acquisition earn outs	5,000
Inventory	$ 600
Estimated useful life of intangible assets other than goodwill (years)	15 years
Trademarks | C3 Wave Tip Location Asset
Business Acquisition [Line Items]
Finite-lived intangibles	$ 900
Product technology | C3 Wave Tip Location Asset
Business Acquisition [Line Items]
Finite-lived intangibles	$ 8,500
Minimum
Business Acquisition [Line Items]
Estimated useful life of intangible assets other than goodwill (years)					2 years
Maximum
Business Acquisition [Line Items]
Estimated useful life of intangible assets other than goodwill (years)					18 years
Eximo Medical, Ltd.
Business Acquisition [Line Items]
Aggregate purchase price		$ 60,700
Payments to acquire business		45,800
Revenue based payments		14,900
Acquisition related costs						600
Inventory		150
Eximo Medical, Ltd. | Product technology
Business Acquisition [Line Items]
Intangible assets		$ 60,300
Useful life		15 years
RadiaDyne
Business Acquisition [Line Items]
Aggregate purchase price			$ 75,000
Payments to acquire business			47,900
Revenue based payments			22,300
Acquisition related costs							$ 1,600
Inventory						732
Other long-term liabilities			4,600
Accrued liabilities			$ 200
RadiaDyne | Customer relationships
Business Acquisition [Line Items]
Estimated useful life of intangible assets other than goodwill (years)			15 years
Intangible assets						4,600
RadiaDyne | Minimum | Trademarks
Business Acquisition [Line Items]
Useful life			5 years
RadiaDyne | Minimum | Product technology
Business Acquisition [Line Items]
Useful life			7 years
RadiaDyne | Maximum | Trademarks
Business Acquisition [Line Items]
Useful life			7 years
RadiaDyne | Maximum | Product technology
Business Acquisition [Line Items]
Useful life			10 years
RadiaDyne | Revenue milestones
Business Acquisition [Line Items]
Revenue based payments			$ 16,500
RadiaDyne | Technical Milestones
Business Acquisition [Line Items]
Revenue based payments			$ 5,800
BioSentry
Business Acquisition [Line Items]
Aggregate purchase price				$ 39,800
Payments to acquire business				37,000
Revenue based payments				$ 2,800
Acquisition related costs						1,000
Inventory						50
BioSentry | Trademarks
Business Acquisition [Line Items]
Intangible assets						2,500
BioSentry | Product technology
Business Acquisition [Line Items]
Intangible assets						20,900
BioSentry | Customer relationships
Business Acquisition [Line Items]
Estimated useful life of intangible assets other than goodwill (years)				10 years
Intangible assets						$ 2,600
BioSentry | Trademarks And Product Technologies
Business Acquisition [Line Items]
Useful life				15 years

XML

Acquisitions - Aggregate Purchase Price (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020	Oct. 02, 2019
Assets acquired
Goodwill	$ 201,316	$ 200,515
Eximo Medical, Ltd.
Assets acquired
Accounts receivable			$ 50
Inventory			150
Prepaid expenses and other current assets			54
Long-term deposits			51
Property, plant and equipment			397
Goodwill			11,427
Total assets acquired			72,429
Liabilities assumed
Accounts payable			84
Other current liabilities			615
Deferred tax liabilities			11,070
Total liabilities assumed			11,769
Net assets acquired			60,660
Eximo Medical, Ltd. | Product technology
Assets acquired
Intangible assets			$ 60,300
RadiaDyne
Assets acquired
Accounts receivable		900
Inventory		732
Prepaid expenses and other current assets		98
Property, plant and equipment		133
Goodwill		47,982
Total assets acquired		75,445
Liabilities assumed
Accounts payable		352
Accrued expenses		106
Total liabilities assumed		458
Net assets acquired		74,987
RadiaDyne | RadiaDyne trademark
Assets acquired
Intangible assets		400
RadiaDyne | OarTrac trademark
Assets acquired
Intangible assets		200
RadiaDyne | RadiaDyne legacy product technology
Assets acquired
Intangible assets		1,500
RadiaDyne | OarTrac product technology
Assets acquired
Intangible assets		18,900
RadiaDyne | Customer relationships
Assets acquired
Intangible assets		4,600
BioSentry
Assets acquired
Inventory		50
Property, plant and equipment		10
Goodwill		13,740
Liabilities assumed
Net assets acquired		39,800
BioSentry | Trademarks
Assets acquired
Intangible assets		2,500
BioSentry | Product technology
Assets acquired
Intangible assets		20,900
BioSentry | Customer relationships
Assets acquired
Intangible assets		$ 2,600

XML

Divestitures (Details) - NAMIC Fluid Management Business - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2020	May 31, 2020	May 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received	$ 169,200	$ 169,200
Gain on divestiture	46,600	46,592	$ 46,592
Working capital adjustments	$ 600	612
Intraperiod tax allocation income tax expense		1,600
Tax effect of gain on divestiture		$ 600

XML

Divestitures - Tables (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2020	May 31, 2021	May 31, 2020	May 31, 2019
Income Statement [Abstract]
Income from discontinued operations		$ 0	$ 0	$ 72,486
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]
Proceeds received from Divestiture		0	0	169,242
Transaction costs for Divestiture		$ 0	0	(4,030)
NAMIC Fluid Management Business | Discontinued Operations, Disposed of by Sale
Income Statement [Abstract]
Net sales				88,850
Cost of sales (exclusive of amortization)				52,978
Gross profit				35,872
Research and development				1,177
Sales and marketing				4,129
General and administrative				271
Amortization of intangibles				2,716
Total operating expenses				8,293
Operating income				27,579
Gain on divestiture	$ 46,600		46,592	46,592
Income from discontinued operations before income taxes				74,171
Income tax expense				(1,685)
Income from discontinued operations				72,486
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]
Proceeds received from Divestiture			169,242
Working capital adjustment	(600)		(612)
Inventories	11,029		11,029
Property, plant and equipment, net	16,624		16,624
Disposal Group, Including Discontinued Operation, Intangible Assets	15,047		15,047
Goodwill	75,308		75,308
Total Fluid Management assets	118,008		118,008
Transaction costs for Divestiture			4,030
Gain on sale of the Fluid Management business before income taxes	$ 46,600		$ 46,592	$ 46,592

XML

Divestitures - Cash Flows (Details) - NAMIC Fluid Management Business - Discontinued Operations, Disposed of by Sale $ in Thousands	12 Months Ended
	May 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided by operating activities	$ 2,245
Net cash provided by investing activities	$ 982

XML

Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 291,010	$ 264,157	$ 270,634
United States
Disaggregation of Revenue [Line Items]
Net sales	237,043	207,980	216,957
International
Disaggregation of Revenue [Line Items]
Net sales	53,967	56,177	53,677
Endovascular Therapies
Disaggregation of Revenue [Line Items]
Net sales	135,079	112,706	119,901
Endovascular Therapies | United States
Disaggregation of Revenue [Line Items]
Net sales	121,427	98,965	106,767
Endovascular Therapies | International
Disaggregation of Revenue [Line Items]
Net sales	13,652	13,741	13,134
Vascular Access
Disaggregation of Revenue [Line Items]
Net sales	101,310	94,299	94,730
Vascular Access | United States
Disaggregation of Revenue [Line Items]
Net sales	81,088	76,768	79,611
Vascular Access | International
Disaggregation of Revenue [Line Items]
Net sales	20,222	17,531	15,119
Oncology
Disaggregation of Revenue [Line Items]
Net sales	54,621	57,152	56,003
Oncology | United States
Disaggregation of Revenue [Line Items]
Net sales	34,528	32,247	30,579
Oncology | International
Disaggregation of Revenue [Line Items]
Net sales	$ 20,093	$ 24,905	$ 25,424

XML

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020
Revenue from External Customer [Line Items]
Right of return period (days)	30 days
Restocking charge (percent)	20.00%
Restocking charge period (months)	12 months
Revenue recognized from contract liabilities	$ 1.2	$ 2.2
Additions to contract liabilities	$ 1.0	$ 2.1
Minimum
Revenue from External Customer [Line Items]
Performance obligation payment term (days)	30 days
Maximum
Revenue from External Customer [Line Items]
Performance obligation payment term (days)	90 days

XML

Revenue from Contracts with Customers Revenue from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Revenue from Contract with Customer [Abstract]
Receivables	$ 35,405	$ 31,263
Contract assets	0	0
Contract liabilities	$ 426	$ 545

XML

Fair Value of Financial Instruments Fair Value of Financial Instruments (Details) - Recurring - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Financial Liabilities
Contingent consideration for acquisition earn outs	$ 15,741	$ 15,647
Total Financial Liabilities	15,741	15,647
Level 1
Financial Liabilities
Contingent consideration for acquisition earn outs	0	0
Total Financial Liabilities	0	0
Level 2
Financial Liabilities
Contingent consideration for acquisition earn outs	0	0
Total Financial Liabilities	0	0
Level 3
Financial Liabilities
Contingent consideration for acquisition earn outs	15,741	15,647
Total Financial Liabilities	$ 15,741	$ 15,647

XML

Fair Value of Financial Instruments Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2021	May 31, 2021	May 31, 2020	May 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		$ 15,647	$ 13,486
Change in present value of contingent consideration (1)		89	14,900
Currency (gain) loss from remeasurement		5
Change in fair value of contingent consideration		89	(11,531)	$ (6,776)
Contingent consideration payments			(1,208)
Ending balance	$ 15,741	$ 15,741	$ 15,647	$ 13,486
Lower Projected Sales Volume Over The Contractual Earn Out Period
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain from reduction in fair value of contingent liability	9,200
Technical Milestones
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain from reduction in fair value of contingent liability	$ 2,700

XML

Fair Value of Financial Instruments Fair Value of Financial Instruments (Details 3)			3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	May 31, 2020 USD ($)	May 31, 2021 USD ($)	May 31, 2021 USD ($)	May 31, 2020 USD ($)	May 31, 2019 USD ($)	Sep. 21, 2018 USD ($)
Summary showing the recurring fair value measurements of the contingent consideration liability
Goodwill impairment	$ 0	$ 158,600,000		$ 0	$ 158,578,000	$ 0
RadiaDyne
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments							$ 22,300,000
RadiaDyne | OarTrac trademark
Summary showing the recurring fair value measurements of the contingent consideration liability
Impairment charge			$ 14,000,000.0
Recurring
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments		15,647,000	15,741,000	15,741,000	15,647,000
Total financial liabilities		15,647,000	15,741,000	15,741,000	15,647,000
Minimum
Summary showing the recurring fair value measurements of the contingent consideration liability
Potential amount of undiscounted future contingent consideration			20,000,000.0	20,000,000.0
Level 3 | Recurring
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments		15,647,000	15,741,000	15,741,000	15,647,000
Total financial liabilities		$ 15,647,000	15,741,000	15,741,000	$ 15,647,000
Revenue based payments | RadiaDyne
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments							16,500,000
Revenue based payments | Valuation Technique, Discounted Cash Flow | Level 3 | Recurring
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments			$ 15,741,000	$ 15,741,000
Revenue based payments | Valuation Technique, Discounted Cash Flow | Level 3 | Recurring | Discount Rate
Summary showing the recurring fair value measurements of the contingent consideration liability
Discount rate used in fair value calculation			5	5
Revenue based payments | Valuation Technique, Discounted Cash Flow | Level 3 | Minimum | Recurring | Measurement Input, Probability of Payment
Summary showing the recurring fair value measurements of the contingent consideration liability
Discount rate used in fair value calculation			0.66	0.66
Revenue based payments | Valuation Technique, Discounted Cash Flow | Level 3 | Maximum | Recurring | Measurement Input, Probability of Payment
Summary showing the recurring fair value measurements of the contingent consideration liability
Discount rate used in fair value calculation			1	1
Technical Milestones | RadiaDyne
Summary showing the recurring fair value measurements of the contingent consideration liability
Revenue based payments							$ 5,800,000

XML

Inventories (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Inventories
Raw materials	$ 22,925	$ 23,308
Work in process	8,022	8,318
Finished goods	17,667	28,279
Total	48,614	59,905
Inventory valuation reserve	$ 3,800	$ 4,700

XML

Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Prepaid expenses and other
Deposits	$ 2,795	$ 689
Employee Retention Tax Credit	1,911	0
Software licenses	1,286	1,002
TSA receivable	2	2,911
License fees	166	203
Trade shows	132	296
Rent	268	246
Other prepaid taxes	379	414
Other	1,760	1,549
Total	$ 8,699	$ 7,310

XML

Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Property, plant and equipment
Property, plant and equipment	$ 82,236	$ 68,501
Less accumulated depreciation	(45,635)	(40,661)
Property, plant and equipment excluding land and land improvements	36,601	27,840
Land and land improvements	472	472
Property, plant and equipment, Net	37,073	28,312
Depreciation expense	5,700	3,300	$ 3,100
Building and building improvements
Property, plant and equipment
Property, plant and equipment	28,979	27,119
Computer software and equipment
Property, plant and equipment
Property, plant and equipment	26,302	24,730
Machinery and equipment
Property, plant and equipment
Property, plant and equipment	14,208	13,602
Placement and evaluation units
Property, plant and equipment
Property, plant and equipment	9,530	0
Construction in progress
Property, plant and equipment
Property, plant and equipment	$ 3,217	$ 3,050

XML

Goodwill and Intangible Assets (Details Textual)			3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	May 31, 2020 USD ($)	May 31, 2021 USD ($)	May 31, 2021 USD ($) segment	May 31, 2020 USD ($)	May 31, 2019 USD ($)
Goodwill and Intangible Assets (Textual) [Abstract]
Number of reporting units | segment				1
Number of operating segments | segment				1
Goodwill impairment	$ 0	$ 158,600,000		$ 0	$ 158,578,000	$ 0
Amortization expense				$ 18,136,000	$ 18,121,000	$ 17,056,000
RadiaDyne | OarTrac trademark
Goodwill and Intangible Assets (Textual) [Abstract]
Impairment charge			$ 14,000,000.0
Minimum
Goodwill and Intangible Assets (Textual) [Abstract]
Estimated useful life of intangible assets other than goodwill (years)				2 years
Maximum
Goodwill and Intangible Assets (Textual) [Abstract]
Estimated useful life of intangible assets other than goodwill (years)				18 years

XML

Goodwill and Intangible Assets (Details 1) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	$ 313,235	$ 327,966
Accumulated amortization	(144,258)	(130,830)
Net carrying value, finite-lived intangible assets	168,977	197,136
Product technologies
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	236,907	251,569
Accumulated amortization	(97,343)	(88,547)
Net carrying value, finite-lived intangible assets	139,564	163,022
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	60,291	60,160
Accumulated amortization	(34,164)	(30,018)
Net carrying value, finite-lived intangible assets	26,127	30,142
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	9,950	10,150
Accumulated amortization	(6,905)	(6,691)
Net carrying value, finite-lived intangible assets	3,045	3,459
Licenses
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, finite-lived intangible assets	6,087	6,087
Accumulated amortization	(5,846)	(5,574)
Net carrying value, finite-lived intangible assets	$ 241	$ 513

XML

Goodwill and Intangible Assets (Details 2) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Expected amortization expense
2020	$ 15,156
2021	15,595
2022	14,111
2023	15,131
2024	16,138
2025 and thereafter	92,846
Net carrying value, finite-lived intangible assets	$ 168,977	$ 197,136

XML

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Loss from continuing operations before tax expense:
U.S.	$ (31,595)	$ (166,984)	$ (15,593)
Non-U.S.	(4,457)	(1,151)	891
Income (loss) before tax expense	$ (36,052)	$ (168,135)	$ (14,702)

XML

Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Current
U.S.	$ 100	$ 96	$ 128
Non U.S.	201	124	289
Current	301	220	417
Deferred
U.S.	(3,375)	(1,122)	(3,948)
Non U.S.	(1,430)	(446)	(25)
Deferred	(4,805)	(1,568)	(3,973)
Income tax benefit	$ (4,504)	$ (1,348)	$ (3,556)

XML

Income Taxes (Details 3) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Deferred tax assets
Net operating loss carryforward	$ 31,564	$ 26,697
Stock-based compensation	3,556	2,923
Federal and state R&D tax credit carryforward	6,715	5,412
Inventories	884	1,071
Expenses incurred not currently deductible	3,091	1,927
Deferred revenue	73	95
Gross deferred tax asset	45,883	38,125
Deferred tax liabilities
Excess tax over book depreciation and amortization	48,744	49,023
Gross deferred tax liability	48,744	49,023
Valuation Allowance	(17,035)	(13,114)
Net deferred tax liability	$ (19,896)	$ (24,012)

XML

Income Taxes (Details Textual) - USD ($)			12 Months Ended
	Dec. 31, 2020	May 31, 2020	May 31, 2021	May 31, 2020	May 31, 2019
Income Taxes (Textual) [Abstract]
Goodwill impairment	$ 0	$ 158,600,000	$ 0	$ 158,578,000	$ 0
Additional unrecognized tax benefit			500,000
Accrued interest and penalties			0
Eximo Medical, Ltd.
Income Taxes (Textual) [Abstract]
Deferred tax liability, purchase accounting adjustment			11,000,000.0
Federal
Income Taxes (Textual) [Abstract]
Net operating loss carryforwards after considering limitations of use			134,600,000
Tax Year 2022 and 2023 | Federal
Income Taxes (Textual) [Abstract]
Federal and State net operating loss carryforwards			8,600,000
Tax Year 2028 and 2037 | Federal
Income Taxes (Textual) [Abstract]
Net operating loss carryforwards after considering limitations of use			79,400,000
Indefinite | Federal
Income Taxes (Textual) [Abstract]
Net operating loss carryforwards after considering limitations of use			46,600,000
Indefinite | Israel
Income Taxes (Textual) [Abstract]
Federal and State net operating loss carryforwards			13,500,000
Tax Year 2020 To 2040 | State
Income Taxes (Textual) [Abstract]
Federal and State net operating loss carryforwards			$ 20,000,000.0

XML

Income Taxes (Details 4) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Reasons for consolidated income tax provision
Income tax benefit at federal statutory tax rate of 21.0%, 21.0% and 28.6%, respectively	$ (7,571)	$ (35,308)	$ (3,087)
State income taxes, net of Federal tax benefit	(462)	(40)	(177)
Impact of Non-U.S. operations	(293)	(100)	76
Research and development tax credit	(1,303)	(1,152)	(936)
Meals and entertainment	116	171	190
Goodwill impairment	0	33,301	0
Change in valuation allowance	3,921	1,426	175
Effect of elimination of stock compensation APIC pool	526	162	0
Other	562	192	203
Income tax benefit	$ (4,504)	$ (1,348)	$ (3,556)

XML

Income Taxes Income Taxes (Details 5) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 464	$ 464	$ 464
Decrease in gross amounts of tax positions related to prior years due to U.S. tax reform	0	0	0
Decrease due to lapse in statute of limitations	0	0	0
Unrecognized tax benefits, ending balance	$ 464	$ 464	$ 464

XML

Accrued Liabilities (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Accrued liabilities
Payroll and related expenses	$ 20,408	$ 13,059
Outside services	4,256	2,222
Royalties	2,663	2,392
Accrued severance	548	794
Sales and franchise taxes	631	634
Litigation matters	975	0
Indemnification holdback	0	5,000
Other	5,978	5,279
Total	$ 35,459	$ 29,380

XML

Long Term Debt - Narrative (Details) - Line of Credit		12 Months Ended
	Jun. 03, 2019 USD ($)	May 31, 2021 covenant
Debt Instrument [Line Items]
Debt default interest rate increase (percentage)		2.00%
Debt instrument, maximum leverage ratio of total indebtedness to adjusted EBITDA		3.00
Debt instrument, maximum leverage ratio of total indebtedness to adjusted EBITDA, following material acquisitions		3.50
Minimum fixed charge coverage ratio		1.25
Minimum
Debt Instrument [Line Items]
Commitment fee (percentage)		0.20%
Maximum
Debt Instrument [Line Items]
Commitment fee (percentage)		0.25%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility borrowing capacity	$ 125,000,000.0
Possible increase in borrowing capacity	$ 75,000,000.0
Number of financial covenants | covenant		2
Interest rate at period end (percentage)		1.36%
Debt instrument, term (years)	5 years
Revolving Credit Facility | Minimum | Base Rate
Debt Instrument [Line Items]
Stated interest rate (percent)		0.25%
Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate (percent)		1.25%
Revolving Credit Facility | Maximum | Base Rate
Debt Instrument [Line Items]
Stated interest rate (percent)		0.75%
Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate (percent)		1.75%

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Retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Retirement Plans (Textual) [Abstract]
Matching contributions	$ 3.8	$ 3.2	$ 3.6

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Stockholders' Equity (Details Textual)		12 Months Ended
	Oct. 29, 2014 $ / shares shares	May 31, 2021 USD ($) Employees working_hour $ / shares shares	May 31, 2020 USD ($) $ / shares shares	May 31, 2019 USD ($) $ / shares shares	May 31, 2017 shares	Oct. 13, 2020 shares
Other Ownership Interests [Line Items]
Authorized capital stock (shares)	80,000,000
Shares of common stock (shares)	75,000,000	75,000,000	75,000,000
Common stock, par value (usd per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000	5,000,000
Preferred stock, par value (usd per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01
Common stock, votes per share	1
Option grants in the period, weighted average grant date fair value (usd per share) | $ / shares		$ 3.97	$ 5.46	$ 6.53
Risk free interest rate		0.34%	1.63%	2.78%
Expected volatility rate		39.00%	31.00%	31.00%
Expected term		4 years 11 months 15 days	4 years 10 months 28 days	4 years 9 months 14 days
The total intrinsic value of options exercised | $		$ 800,000	$ 500,000	$ 1,400,000
Compensation not yet recognized | $		3,900,000
Proceeds from stock options exercised | $		1,900,000	600,000	1,500,000
Tax benefit | $		$ 2,000,000.0	$ 1,700,000	$ 2,100,000
Grants in the period, weighted average grant date fair value (usd per share) | $ / shares			$ 20.35	$ 20.87
Average price of share issued | $ / shares		$ 7.95	$ 12.11	$ 16.08
Employee Stock Option
Other Ownership Interests [Line Items]
Percentage of grants to employees vesting		25.00%
Option grants to employees vesting period		4 years
Period of recognition for costs not yet recognized (years)		4 years
Tax benefit | $		$ 0	$ 0	$ 0
Restricted Stock Units
Other Ownership Interests [Line Items]
Vesting period		1 year
Grants in the period, weighted average grant date fair value (usd per share) | $ / shares		$ 10.40
Employee service, compensation cost not yet recognized | $		$ 6,500,000
Nonvested compensation, weighted average grant date fair value (usd per share) | $ / shares		$ 13.28	$ 19.65
Nonvested compensation (shares)		762,103	464,921
Performance Share and Restricted Stock Unit Awards
Other Ownership Interests [Line Items]
Total fair value of restricted stock awards vesting | $		$ 2,100,000	$ 3,900,000	$ 4,600,000
Performance Shares
Other Ownership Interests [Line Items]
Compensation not yet recognized | $		$ 2,100,000
Nonvested compensation, weighted average grant date fair value (usd per share) | $ / shares		$ 9.72	$ 14.06	$ 28.62
Performance period		3 years
2004 Stock and Incentive Award Plan
Other Ownership Interests [Line Items]
Total number of common stock available to be issued (shares)		2,300,000
Stock Purchase Plan
Other Ownership Interests [Line Items]
Total number of common stock available to be issued (shares)		2,400,000
Maximum number of shares to be offered		4,000,000
Share purchase periods | Employees		2
Duration of purchase of shares		6 months
Employee eligible in participating in offering period		6 months
Number of working hours to be eligible (working hour) | working_hour		20
Number of working months to be eligible		5 months
Employees ownership threshold		5.00%
Percentage of fair market value of a share of common stock on the first day of the offering period		85.00%
Percentage of fair market value of a share of common stock on the last day of the offering period		85.00%
Number of additional shares reserved for issuance (shares)		500,000		1,000,000	500,000
Maximum number of shares to be offered under the Stock Purchase Plan		164,194	100,567	72,863
Stock And Incentive Award Plan 2020
Other Ownership Interests [Line Items]
Total number of common stock reserved for issuance (shares)						2,400,000

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Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	May 31, 2021 USD ($) $ / shares shares
Schedule summarizes stock option activity
Shares Outstanding at beginning of year (shares) | shares	1,938,753
Shares Granted (shares) | shares	528,809
Shares Exercised (shares) | shares	(137,237)
Shares Forfeited (shares) | shares	(132,895)
Shares Expired (shares) | shares	(50,470)
Shares Outstanding at end of year (shares) | shares	2,146,960
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, Outstanding at beginning of year (usd per share) | $ / shares	$ 16.89
Weighted average exercise price Granted (usd per share) | $ / shares	11.41
Weighted average exercise price Exercised (usd per share) | $ / shares	16.45
Weighted average exercise price Forfeited (usd per share) | $ / shares	18.38
Weighted average exercise price Expired (usd per share) | $ / shares	12.33
Weighted average exercise price, Outstanding at end of year (usd per share) | $ / shares	$ 15.59
Shares Options exercisable at year-end (shares) | shares	1,067,686
Shares Options expected to vest in future periods (shares) | shares	1,079,274
Weighted average exercise price, Options exercisable at year end (usd per share) | $ / shares	$ 16.26
Weighted average exercise price, Options expected to vest in future periods (usd per share) | $ / shares	$ 14.92
Weighted average remaining contractual life	6 years 2 months 26 days
Weighted average remaining contractual life, Option exercisable at year end	3 years 10 months 28 days
Weighted average remaining contractual life, Option expected to vest in future periods	8 years 6 months 10 days
Aggregate intrinsic value, Outstanding at end of year | $	$ 16,176
Aggregate intrinsic value, Options exercisable at year end | $	7,324
Aggregate intrinsic value, Option expected to vest in future periods | $	$ 8,852

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Stockholders' Equity (Details 2) - $ / shares	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Weighted Average Grant-Date Fair Value
Weighted Average Grant-Date Fair Value, Granted (usd per share)		$ 20.35	$ 20.87
Restricted Stock Units
Shares
Non-Vested Stock Award Units Beginning Balance (shares)	464,921
Non-Vested Stock Award Units, Granted (shares)	533,708
Non-Vested Stock Award Units, Vested (shares)	(205,202)
Non-Vested Stock Award Units, Cancelled (shares)	(31,324)
Non-Vested Stock Award Units Ending Balance (shares)	762,103	464,921
Weighted Average Grant-Date Fair Value
Weighted Average Grant-Date Fair Value Beginning Balance (usd per share)	$ 19.65
Weighted Average Grant-Date Fair Value, Granted (usd per share)	10.40
Weighted Average Grant-Date Fair Value, Vested (usd per share)	10.02
Weighted Average Grant-Date Fair Value, Cancelled (usd per share)	17.30
Weighted Average Grant-Date Fair Value Ending Balance (usd per share)	$ 13.28	$ 19.65
Performance Shares
Shares
Non-Vested Stock Award Units Beginning Balance (shares)	273,121
Non-Vested Stock Award Units, Granted (shares)	232,236
Non-Vested Stock Award Units, Vested (shares)	0
Non-Vested Stock Award Units, Cancelled (shares)	(129,066)
Non-Vested Stock Award Units Ending Balance (shares)	376,291	273,121
Weighted Average Grant-Date Fair Value
Weighted Average Grant-Date Fair Value Beginning Balance (usd per share)	$ 22.07
Weighted Average Grant-Date Fair Value, Granted (usd per share)	9.72
Weighted Average Grant-Date Fair Value, Vested (usd per share)	0
Weighted Average Grant-Date Fair Value, Cancelled (usd per share)	21.28
Weighted Average Grant-Date Fair Value Ending Balance (usd per share)	$ 14.72	$ 22.07

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Stockholders' Equity (Details 3) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock based compensation pre tax amount	$ 8,625	$ 7,592	$ 9,249
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock based compensation pre tax amount	768	655	461
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock based compensation pre tax amount	1,152	971	724
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock based compensation pre tax amount	1,641	1,665	1,952
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock based compensation pre tax amount	$ 5,064	$ 4,301	$ 6,112

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Earnings Per Share (Details) - shares	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Earnings Per Share [Abstract]
Basic	38,342,476	37,961,224	37,484,573
Effect of dilutive securities	0	0	0
Diluted	38,342,476	37,961,224	37,484,573
Securities excluded as their inclusion would be anti-dilutive	3,285,354	2,581,006	2,200,318

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Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019	Jun. 01, 2019
Lessee, Lease, Description [Line Items]
Accounting standards update, extensible list	Accounting Standards Update 2016-02
Total lease liabilities	$ 9,734	$ 10,422
Operating lease ROU asset	9,382	10,146
Non-cash lease expense	$ 3,207	$ 3,351
Rent expense			$ 2,500
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Total lease liabilities				$ 5,600
Operating lease ROU asset				$ 5,600

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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Leases [Abstract]
Operating lease ROU asset	$ 9,382	$ 10,146
Less: Current portion of lease obligations	2,415	2,077
Long-term lease obligations	7,319	8,345
Total lease obligations	$ 9,734	$ 10,422
Weighted average remaining term (in years)	4 years 1 month 13 days	5 years
Weighted average discount rate (percent)	3.80%	4.20%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities

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Leases - Liability Maturity Schedule (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Leases [Abstract]
2021	$ 2,735
2022	2,787
2023	2,209
2024	1,454
2025	1,148
2026 and thereafter	171
Total lease payments	10,504
Less: Imputed Interest	770
Total lease obligations	9,734	$ 10,422
Less: Current portion of lease obligations	2,415	2,077
Long-term lease obligations	$ 7,319	$ 8,345

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Leases - Supplemental Statement of Operations Information (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
Lessee, Lease, Description [Line Items]
Non-cash lease expense	$ 3,207	$ 3,351
Cost of sales
Lessee, Lease, Description [Line Items]
Non-cash lease expense	820	1,138
Research and development
Lessee, Lease, Description [Line Items]
Non-cash lease expense	857	583
Sales and marketing
Lessee, Lease, Description [Line Items]
Non-cash lease expense	407	397
General and administrative
Lessee, Lease, Description [Line Items]
Non-cash lease expense	$ 1,123	$ 1,233

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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 2,698	$ 2,372
Operating leases	$ 1,585	$ 6,918

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Commitments and Contingencies - Schedule (Details) $ in Thousands	May 31, 2021 USD ($)
Purchase Obligations
Total	$ 4,697
2022	4,697
2023	0
2024	0
2025	0
2026 and thereafter	0
Royalties
Total	47,700
2022	3,800
2023	3,800
2024	3,800
2025	3,800
2026 and thereafter	32,500
Total	52,397
2022	8,497
2023	3,800
2024	3,800
2025	3,800
2026 and thereafter	$ 32,500

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Commitments and Contingencies - Narrative (Details) $ in Millions	Jun. 28, 2019 USD ($)	Mar. 10, 2015 patent	Jan. 11, 2012 patent
C.R. Bard, Inc.
Loss Contingencies [Line Items]
Number of petitions filed for reexamination of patents			3
Number of patents upheld over prior art references			2
The Delaware Action
Loss Contingencies [Line Items]
Number of patents allegedly infringed upon		3
Merz North America Settlement
Loss Contingencies [Line Items]
Payments for legal settlement | $	$ 2.5

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Segments and Geographic Information - Sales by Product Category (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Net sales by Product Category
Net sales	$ 291,010	$ 264,157	$ 270,634
Endovascular Therapies
Net sales by Product Category
Net sales	135,079	112,706	119,901
Vascular Access
Net sales by Product Category
Net sales	101,310	94,299	94,730
Oncology/Surgery
Net sales by Product Category
Net sales	$ 54,621	$ 57,152	$ 56,003

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Segments and Geographic Information - Sale for Geographic Areas (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Net sales by Geography
Revenues	$ 291,010	$ 264,157	$ 270,634
United States
Net sales by Geography
Revenues	237,043	207,980	216,957
International
Net sales by Geography
Revenues	$ 53,967	$ 56,177	$ 53,677

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Segments and Geographic Information - Narrative (Details)	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Segment Reporting [Abstract]
International sales percentage of total net sales	19.00%	21.00%	20.00%
Total assets are located within the United States	99.00%

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Acquisition, Restructuring and Other Items, net - Schedule (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2021	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost and Reserve [Line Items]
Total		$ 20,232	$ 6,014	$ 15,127
RadiaDyne | OarTrac trademark
Restructuring Cost and Reserve [Line Items]
Impairment charge	$ 14,000
Legal
Restructuring Cost and Reserve [Line Items]
Total		6,161	2,666	7,802
Mergers and acquisitions
Restructuring Cost and Reserve [Line Items]
Total		1	782	4,030
Transition service agreement
Restructuring Cost and Reserve [Line Items]
Total		(1,032)	(1,799)	0
Divestiture
Restructuring Cost and Reserve [Line Items]
Total		393	2,809	0
Intangible and other asset impairment
Restructuring Cost and Reserve [Line Items]
Total		13,953	0	1,704
Restructuring
Restructuring Cost and Reserve [Line Items]
Total		0	26	289
Other
Restructuring Cost and Reserve [Line Items]
Total		$ 756	$ 1,530	$ 1,302

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Acquisition, Restructuring and Other Items, net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ 20,232	$ 6,014	$ 15,127
Settlement Expense
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	1,000
Legal
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ 6,161	2,666	7,802
Legal | Biolitec, Inc.
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net		$ 500	3,400
Legal | Merz Contract Termination
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net			$ 2,500

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 454,872	$ 614,815
Ending Balance	439,457	454,872
Foreign currency translation gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,341)	(1,352)
Other comprehensive income before reclassifications, net of tax	4,494	11
Total comprehensive income (loss), net of tax	4,494	11
Ending Balance	$ 3,153	$ (1,341)

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Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Allowance for deferred tax asset
Valuation and Qualifying Accounts
Balance at Beginning of Year	$ 13,114	$ 11,688	$ 26,607
Additions - Charged to costs and expenses	3,921	1,426	0
Deductions	0	0	(14,919)
Balance at End of Period	17,035	13,114	11,688
Allowance for sales returns and doubtful accounts
Valuation and Qualifying Accounts
Balance at Beginning of Year	2,150	1,906	2,466
Additions - Charged to costs and expenses	1,833	1,218	393
Deductions	(2,064)	(974)	(953)
Balance at End of Period	$ 1,919	$ 2,150	$ 1,906