10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

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

For the Quarterly Period Ended March 31, 2019

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 No. 001-36226

RUDOLPH TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

Delaware	22-3531208
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

16 Jonspin Road, Wilmington, Massachusetts 01887

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (978) 253-6200

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

Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Stock, $0.001 par value per share	RTEC	New York Stock Exchange (NYSE)

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 every Interactive Data File required to be submitted 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 such files).     Yes  ☒    No  ☐

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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

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

The number of outstanding shares of the Registrant’s Common Stock on April 16, 2019 was 31,026,385.

TABLE OF CONTENTS

Item No.		Page
	PART I    FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)	3
	Condensed Consolidated Balance Sheets at March 31, 2019 and December 31, 2018	3
	Condensed Consolidated Statements of Operations for the three months ended March 31, 2019 and 2018	4
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2019 and 2018	5
	Condensed Consolidated Statements of Stockholders’ Equity for the three months ended March 31, 2019   and 2018	6
	Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2019 and 2018	7
	Notes to Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	24
Item 4.	Controls and Procedures	25
	PART II    OTHER INFORMATION
Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	26
Item 3.	Defaults Upon Senior Securities	26
Item 4.	Mine Safety Disclosures	26
Item 5.	Other Information	26
Item 6.	Exhibits	27

PART I FINANCIAL INFORMATION

Item 1. Financial Statements

RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

	March 31, 2019			December 31, 2018
	(Unaudited)
ASSETS
Current Assets:
Cash and cash equivalents	$	100,168		$	112,388
Marketable securities		70,602			62,684
Accounts receivable, less allowance of $1,032 and $691		66,357			64,194
Inventories, net		103,989			96,820
Income taxes receivable		5,046			6,111
Prepaid expenses and other current assets		9,958			8,710
Total current assets		356,120			350,907
Property, plant and equipment, net		18,599			18,874
Operating lease right-of-use assets		13,734			—
Goodwill		22,495			22,495
Identifiable intangible assets, net		7,061			7,448
Other assets		18,301			18,316
Total assets	$	436,310		$	418,040
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable and accrued liabilities	$	26,391		$	30,681
Deferred revenue		7,491			6,767
Current operating lease obligations		2,458			—
Other current liabilities		7,852			7,543
Total current liabilities		44,192			44,991
Non-current operating lease obligations		12,742			—
Other non-current liabilities		9,514			11,161
Total liabilities		66,448			56,152
Commitments and contingencies
Stockholders’ equity:
Common stock		31			31
Additional paid-in capital		370,714			369,893
Accumulated other comprehensive loss		(1,686	)		(1,263	)
Retained earnings (accumulated deficit)		803			(6,773	)
Total stockholders’ equity		369,862			361,888
Total liabilities and stockholders’ equity	$	436,310		$	418,040

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

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RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended March 31,
	2019			2018
Revenue	$	60,892		$	73,096
Cost of revenue		28,873			30,675
Gross profit		32,019			42,421
Operating expenses:
Research and development		12,718			11,783
Selling, general and administrative		11,306			12,793
Amortization		387			380
Total operating expenses		24,411			24,956
Operating income		7,608			17,465
Interest income, net		(806	)		(391	)
Other (income) expense, net		(381	)		182
Income before income taxes		8,795			17,674
Provision for income taxes		1,219			2,544
Net income	$	7,576		$	15,130
Earnings per share:
Basic	$	0.25		$	0.48
Diluted	$	0.24		$	0.47
Weighted average shares outstanding:
Basic		30,916			31,662
Diluted		31,266			32,317

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

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RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended March 31,
	2019			2018
Net income	$	7,576		$	15,130
Other comprehensive income:
Change in net unrealized gains on marketable securities, net of tax		95			23
Change in currency translation adjustments		(518	)		632
Total comprehensive income	$	7,153		$	15,785

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

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RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)

	Common Stock					Additional Paid-in			Accumulated Other Comprehensive			Retained Earnings (Accumulated
	Shares			Amount		Capital			Loss			Deficit)			Total
Balance at December 31, 2018		30,906		$	31	$	369,893		$	(1,263	)	$	(6,773	)	$	361,888
Issuance of shares through share-based    compensation plans, net		103			—		—			—			—			—
Repurchase of common stock		(37	)				(744	)		—			—			(744	)
Net income		—			—		—			—			7,576			7,576
Share-based compensation		—			—		2,163			—			—			2,163
Share-based compensation plan     withholdings		(27	)		—		(598	)		—			—			(598	)
Currency translation		—			—		—			(518	)		—			(518	)
Unrealized gain on investments		—			—		—			95			—			95
Balance at March 31, 2019		30,945		$	31	$	370,714		$	(1,686	)	$	803		$	369,862
	Common Stock					Additional Paid-in			Accumulated Other Comprehensive			Retained Earnings (Accumulated
	Shares			Amount		Capital			Loss			Deficit)			Total
Balance at December 31, 2017		31,604		$	32	$	386,196		$	(1,205	)	$	(51,869	)	$	333,154
Issuance of shares through share-based    compensation plans, net		169			—		122			—			—			122
Net income		—			—		—			—			15,130			15,130
Share-based compensation		—			—		1,507			—			—			1,507
Share-based compensation plan     withholdings		(31	)		—		(839	)		—			—			(839	)
Currency translation		—			—		—			632			—			632
Unrealized gain on investments		—			—		—			23			—			23
Balance at March 31, 2018		31,742		$	32	$	386,986		$	(550	)	$	(36,739	)	$	349,729

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

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RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended March 31,
	2019			2018
Cash flows from operating activities:
Net income	$	7,576		$	15,130
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Amortization of intangibles		387			380
Depreciation		1,254			1,310
Foreign currency exchange (loss) gain		(381	)		183
Change in fair value of contingent consideration		—			318
Share-based compensation		2,163			1,507
Provision for doubtful accounts and inventory valuation		1,028			705
Changes in operating assets and liabilities		(13,593	)		(14,894	)
Net cash and cash equivalents (used in) provided by operating activities		(1,566	)		4,639
Cash flows from investing activities:
Purchases of marketable securities		(22,142	)		(57,134	)
Proceeds from sales of marketable securities		14,295			54,404
Purchases of property, plant and equipment		(1,320	)		(1,442	)
Net cash and cash equivalents used in investing activities		(9,167	)		(4,172	)
Cash flows from financing activities:
Purchase of common stock		(744	)		—
Tax payments related to shares withheld for share-based compensation plans		(598	)		(839	)
Issuance of shares through share-based compensation plans		—			122
Net cash and cash equivalents used in financing activities		(1,342	)		(717	)
Effect of exchange rate changes on cash and cash equivalents		(145	)		535
Net increase in cash and cash equivalents		(12,220	)		285
Cash and cash equivalents at beginning of period		112,388			67,770
Cash and cash equivalents at end of period	$	100,168		$	68,055
Supplemental disclosure of cash flow information:
Income taxes paid	$	114		$	249

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

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RUDOLPH TECHNOLOGIES, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except per share data)

(Unaudited)

NOTE 1. Basis of Presentation

The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared by Rudolph Technologies, Inc. (the “Company” or “Rudolph”) and in the opinion of management reflect all adjustments, consisting of normal recurring accruals, necessary for their fair presentation in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  Preparing financial statements requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes.  Actual amounts could differ materially from reported amounts.  The interim results for the three month period ended March 31, 2019 are not necessarily indicative of results to be expected for the entire year or any future periods.  This interim financial information should be read in conjunction with the financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (“2018 10-K”) filed with the Securities and Exchange Commission (“SEC”) on February 15, 2019.  The accompanying Condensed Consolidated Balance Sheets at December 31, 2018 has been derived from the audited consolidated financial statements included in the 2018 10-K.

Recent Accounting Pronouncements

Recently Adopted

Effective January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2018-07, “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting.”  This ASU expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees.  An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost.  The ASU is effective for the fiscal years beginning after December 15, 2018, including interim periods within that fiscal year.  The adoption of ASU No. 2018-07 did not have a material impact on the Company’s consolidated financial position, results of operations, and cash flows.  

Effective January 1, 2019, the Company adopted ASU No. 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.”  The new guidance allows companies to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the “Tax Act”) from accumulated other comprehensive income to retained earnings.  The guidance also requires certain new disclosures regardless of a company’s election.  The standard is effective for annual periods beginning after December 15, 2018 and for interim periods within those annual periods, with earlier adoption permitted.  The adoption of ASU No. 2018-02 did not have a material impact on the Company’s consolidated financial position, results of operations, and cash flows.

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842).” ASU No. 2016-02 requires that lessees recognize virtually all of their leases on the balance sheet, by recording a right-of-use asset and lease liability. On January 1, 2019, the Company adopted ASU No. 2016-02 using the modified retrospective method which applies the provisions of the standard at the effective date without adjusting the comparative periods presented.  The Company also elected the package of practical expedients.

There was not a cumulative-effect adjustment to the Company’s beginning retained earnings as a result of adopting ASU No. 2016-02. The Company has recognized additional operating lease assets and obligations of $14.4 million as of January 1, 2019. The Company elected to not reassess prior conclusions related to the identification, classification and accounting for initial direct costs for leases that commenced prior to January 1, 2019. For additional disclosure and detail, see Note 5 of the Notes to the Condensed Consolidated Financial Statements, “Leasing Arrangements.”

Recently Issued

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.”  This ASU is part of the FASB’s larger disclosure framework project intended to improve the effectiveness of financial statement footnote disclosure.  ASU No. 2018-13 modifies required fair value disclosures related primarily to level 3 investments.  This ASU is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods.  The adoption of ASU No. 2018-13 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows.

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In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting.”  This ASU amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under Accounting Standards Codification (“ASC”) 718.  The ASU is effective for the fiscal years beginning after December 15, 2019 and for interim periods within those fiscal years.  The adoption of ASU No. 2017-09 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows, if any.

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.”  This ASU eliminates Step 2 from the goodwill impairment test.   Accordingly, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss will be recognized in an amount equal to the excess, limited to the total amount of goodwill allocated to the reporting unit.  The ASU is effective for the fiscal years beginning after December 15, 2019 and for interim periods within those fiscal years.  The Company is currently evaluating the effect the adoption of ASU No. 2017-04 will have on its consolidated financial position, results of operations, and cash flows, if any.

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments – Credit Losses (Topic 326),” which introduced new guidance for the accounting for credit losses on instruments within its scope.  Given the breadth of that scope, this ASU will impact both financial services and non-financial services entities.  The standard is effective for fiscal years beginning after December 15, 2020.  The Company is currently evaluating the effect the adoption of ASU No. 2016-13 will have on its consolidated financial position, results of operations, and cash flows, if any.

Recently issued accounting guidance not discussed above is not applicable.

NOTE 2. Fair Value Measurements

The Company applies a three-level valuation hierarchy for fair value measurements.  This hierarchy prioritizes the inputs into three broad levels.  Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities.  Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability.  Level 3 inputs are unobservable inputs based on management’s assumptions used to measure assets and liabilities at fair value.  A financial asset’s or liability’s fair value measurement classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2019 and December 31, 2018:

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2019
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	70,602	$	—	$	70,602	$	—
Foreign currency forward contracts		13		—		13		—
Total assets	$	70,615	$	—	$	70,615	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Total liabilities	$	2,060	$	—	$	—	$	2,060
December 31, 2018
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	62,684	$	—	$	62,684	$	—
Total assets	$	62,684	$	—	$	62,684	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Foreign currency forward contracts		32		—		32		—
Total liabilities	$	2,092	$	—	$	32	$	2,060

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Level 1 inputs are based on quoted market prices that are available in active markets.  The Company does not have any recurring financial assets and liabilities that are recorded in its Condensed Consolidated Balance Sheets as of March 31, 2019 and December 31, 2018 that are classified as Level 1 inputs.

The Company’s available-for-sale debt securities classified as Level 2 are valued using observable inputs to quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency.  The foreign currency forward contracts are primarily measured based on the foreign currency spot and forward rates quoted by the banks or foreign currency dealers.  Investment prices are obtained from third party pricing providers, which model prices utilizing the above observable inputs, for each asset class.

Level 3 liabilities consisted of contingent consideration related to an acquisition for which the Company uses a discounted cash flow model to value these liabilities.  The Level 3 assumptions used in the discounted cash flow model for the contingent consideration included projected revenue, timing of cash flows and estimates of discount rates of 9.2% and 9.4% for the three months ended March 31, 2019 and 2018, respectively.  A significant decrease in the projected revenue or increase in discount rates could result in a significantly lower fair value measurement for the contingent consideration.  

This table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2019:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2018	$	2,060
Additions		—
Payments		—
Transfer into (out of) Level 3		—
Balance at March 31, 2019	$	2,060

See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.

Fair Value of Other Financial Instruments

The carrying value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value because of the short-term maturity of these instruments.  The estimated fair value of these obligations is based primarily on a market approach, comparing the Company’s interest rates to those rates the Company believes it would reasonably receive upon re-entry into the market.  Judgment is required to estimate the fair value, using available market information and appropriate valuation methods.

The carrying amount of the convertible notes receivable approximates fair value based on current interest rates for instruments with similar characteristics.  Convertible notes receivable are initially recognized at fair value. The Company does not subsequently adjust the fair value of these convertible notes receivable unless it is determined that the convertible notes receivable are impaired. The Company considers the issuer’s financial condition, payment history, and other relevant factors when assessing the collectability of a convertible note and to reserve the portion of such convertible note for which collection does not appear likely. Interest income is recognized as earned.

NOTE 3. Marketable Securities

The Company has evaluated its investment policies and determined that all of its marketable securities, which are comprised of debt securities, are to be classified as available-for-sale.  The Company’s available-for-sale debt securities are carried at fair value, with the unrealized gains and losses reported in Stockholders’ equity under the caption “Accumulated other comprehensive loss.”  Realized gains and losses on available-for-sale securities are included in “Other expense (income)” on the Condensed Consolidated Statements of Operations.  The Company records other-than-temporary impairment charges for its available-for-sale debt securities when it intends to sell the securities, it is more-likely-than not that it will be required to sell the securities before a recovery, or when it does not expect to recover the entire amortized cost basis of the securities.  The cost of securities sold is based on the specific identification method.

The Company has determined that the gross unrealized losses on its marketable securities at March 31, 2019 and December 31, 2018 are temporary in nature.  The Company reviews its investment portfolio to identify and evaluate marketable securities that have indications of possible impairment.  Factors considered in determining whether a loss is other-than-

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temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the securities for a period of time sufficient to allow for any anticipated recovery in market value.

At March 31, 2019 and December 31, 2018, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2019
Municipal notes and bonds	$	70,481	$	126	$	5	$	70,602
Total marketable securities	$	70,481	$	126	$	5	$	70,602
December 31, 2018
Municipal notes and bonds	$	62,681	$	43	$	40	$	62,684
Total marketable securities	$	62,681	$	43	$	40	$	62,684

The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheets classification, is as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	57,345	$	57,379	$	47,767	$	47,732
Due after one through five years		13,136		13,223		14,914		14,952
Due after five through ten years		—		—		—		—
Due after ten years		—		—		—		—
Total marketable securities	$	70,481	$	70,602	$	62,681	$	62,684

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at March 31, 2019 and December 31, 2018:

	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2019
Municipal notes and bonds	$	10,400	$	1	$	4,676	$	4
Total	$	10,400	$	1	$	4,676	$	4
December 31, 2018
Municipal notes and bonds	$	27,952	$	30	$	4,671	$	10
Total	$	27,952	$	30	$	4,671	$	10

See Note 2 for additional discussion regarding the fair value of the Company’s marketable securities.

NOTE 4. Derivative Instruments and Hedging Activities

The Company, when it considers it to be appropriate, enters into forward contracts to hedge the economic exposures arising from foreign currency denominated transactions. At March 31, 2019 and December 31, 2018, these contracts included the future sale of Japanese Yen to purchase U.S. dollars.  Derivative instruments are measured at fair value and recognized as either, “Prepaid expenses and other current assets” or “Other current liabilities” in the Condensed Consolidated Balance Sheets with changes in the net derivatives position reflected in operating cash flows.  The foreign currency forward contracts were entered into by the Company’s Japanese subsidiary to economically hedge a portion of certain intercompany obligations.  The forward contracts are not designated as hedges for accounting purposes and increases in the fair value of $45 for the three months ended March 31, 2019 and a decrease in the fair value of $433 for the three months ended March 31, 2018, are recorded under the caption “Other expense (income), net” in the Condensed Consolidated Statements of Operations.

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The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019		December 31, 2018
Notional amount	$	5,806	$	6,746
Fair value of asset (liability)	$	13	$	(32	)

NOTE 5. Leasing Arrangements

The Company leases space for its corporate headquarters, manufacturing, sales and service operations, vehicles and information technology equipment under operating leases. All of the Company’s leases are operating leases.  The Company elected not to apply Accounting Standard Codification Topic 842 (“ASC 842”) to arrangements with lease terms of less than 12 months.  Operating lease right-of-use assets and obligations are reflected within the captions “Operating lease right-of-use assets,” “Current operating lease obligations,” and “Non-current operating lease obligations,” respectively, on the Condensed Consolidated Balance Sheets.

Operating lease costs were $877 during the three months ended March 31, 2019.  These costs are primarily related to long-term operating leases, but also include immaterial amounts for short-term leases less than 12 months.  Operating lease costs are recognized on a straight-line basis over the terms of the leases.

Additional operating lease right-of-use assets of $10 were recognized as non-cash asset additions that resulted from new operating lease liabilities during the three months ended March 31, 2019. Cash paid for amounts included in the present value of operating lease liabilities was $846 during the three months ended March 31, 2019 and is included in operating cash flows.

The Company often has the option to renew lease terms for buildings and other assets. The exercise of lease renewal options are generally at the Company’s sole discretion. In addition, certain lease arrangements may be terminated prior to their original expiration date at the Company’s discretion. The Company evaluates renewal and termination options at the lease commencement date to determine if it is reasonably certain to exercise the option on the basis of economic factors. The weighted average of the remaining lease term for operating leases as of March 31, 2019 was 8.1 years.

The discount rate implicit within the Company’s leases is generally not determinable and therefore the Company determines the discount rate based on its incremental borrowing rate. The incremental borrowing rate for our leases is determined based on the lease term in which lease payments are made. The weighted average discount rate used to measure operating lease liabilities as of March 31, 2019 was 4.7%.

The following table presents information about the amount and timing of cash flows arising from the Company’s operating leases as of March 31, 2019:

	March 31, 2019
Maturity of Lease Liabilities	Lease Payments
2019	$	2,361
2020		2,944
2021		2,019
2022		1,988
2023	$	1,698
Thereafter		7,484
Total undiscounted operating lease payments	$	18,494
Less: Imputed interest		3,294
Present value of operating lease liabilities	$	15,200

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NOTE 6. Purchased Intangible Assets

Purchased intangible assets as of March 31, 2019 and December 31, 2018 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2019
Finite-lived intangibles:
Developed technology	$	66,177	$	59,987	$	6,190
Customer and distributor relationships		9,560		9,149		411
Trade names		4,361		3,901		460
Total identifiable intangible assets	$	80,098	$	73,037	$	7,061
December 31, 2018
Finite-lived intangibles:
Developed technology	$	66,177	$	59,692	$	6,485
Customer and distributor relationships		9,560		9,082		478
Trade names		4,361		3,876		485
Total identifiable intangible assets	$	80,098	$	72,650	$	7,448

Intangible asset amortization expenses for the three months ended March 31, 2019 and 2018 were $387 and $380, respectively.  Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expenses for the remainder of 2019 are $1,161, and for each of the next five years estimated amortization expenses are $1,346 for 2020, $598 for 2021, $532 for 2022, $515 for 2023, and $431 for 2024.

NOTE 7. Convertible Notes Receivable

The Company entered into a convertible loan agreement with Simax Precision Technologies Limited (“Simax”) on May 31, 2018.  Under the agreement, Simax may borrow from the Company up to $15,000 in multiple promissory notes, subject to limitations.  The Company expects to be a supplier of lithography modules to Simax which is focused on the manufacture, sale and service of lithography systems.  

The convertible notes will bear a rate of interest of 4.25% per annum payable on a semi-annual basis.  The convertible notes provide the Company with the option to convert the outstanding indebtedness into equity.   If the Company does not elect to exercise its option to convert the notes into equity, Simax will repay the principal amount outstanding and any outstanding interest in equal installments beginning on the fifth anniversary of the loan date and continuing on a quarterly basis over the next three years.

As of March 31, 2019, the convertible notes receivable balance was $5,000 with accrued interest of $93.

NOTE 8. Balance Sheet Details

Inventories

Inventories are comprised of the following:

	March 31, 2019		December 31, 2018
Materials	$	70,431	$	61,025
Work-in-process		22,342		21,910
Finished goods		11,216		13,885
Total inventories	$	103,989	$	96,820

The Company has established reserves of $11,711 and $11,678 as of March 31, 2019 and December 31, 2018, respectively, for slow moving and obsolete inventory, which are included in the amounts above.

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Property, Plant and Equipment

Property, plant and equipment, net is comprised of the following:

	March 31, 2019			December 31, 2018
Land and building	$	2,584		$	2,584
Machinery and equipment		28,886			29,097
Furniture and fixtures		3,232			3,226
Computer equipment and software		8,901			7,906
Leasehold improvements		9,449			9,448
		53,052			52,261
Accumulated depreciation		(34,453	)		(33,387	)
Total property, plant and equipment, net	$	18,599		$	18,874

Other assets

Other assets is comprised of the following:

	March 31, 2019		December 31, 2018
Convertible notes receivable	$	5,000	$	5,000
Deferred income taxes		12,785		12,810
Other		516		506
Total other assets	$	18,301	$	18,316

Other current liabilities

Other current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Contingent consideration - acquisitions	$	1,422	$	1,422
Customer deposits		888		1,135
Accrued inventory		1,082		1,103
Other		4,460		3,883
Total other current liabilities	$	7,852	$	7,543

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Unrecognized tax benefits (including interest)	$	5,462	$	5,409
Contingent consideration - acquisitions		638		638
Deferred revenue		1,196		1,314
Deferred rent		—		1,405
Other		2,218		2,395
Total other non-current liabilities	$	9,514	$	11,161

NOTE 9. Commitments and Contingencies

Intellectual Property Indemnification Obligations

The Company has entered into agreements with customers that include limited intellectual property indemnification obligations that are customary in the industry.  These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third-party intellectual property claims arising from these transactions.  The nature of the intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers.  Historically, the Company has not made any indemnification payments under such agreements and no amount has been accrued in the accompanying Condensed Consolidated Financial Statements with respect to these indemnification guarantees.

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Warranty Reserves

The Company generally provides a warranty on its products for a period of 12 to 15 months against defects in material and workmanship.  The Company estimates the costs that may be incurred during the warranty period and records a liability in the amount of such costs at the time revenue is recognized.  The Company’s estimate is based primarily on historical experience.  The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.  Settlements of warranty reserves are generally associated with sales that occurred during the 12 to 15 months prior to the quarter-end and warranty accruals are related to sales during the same year.

Changes in the Company’s warranty reserves are as follows:

	Three Months Ended March 31,
	2019			2018
Balance, beginning of the period	$	2,441		$	2,427
Accruals		672			959
Usage		(853	)		(820	)
Balance, end of the period	$	2,260		$	2,566

Warranty reserves are reported in the Condensed Consolidated Balance Sheets under the caption “Accounts payable and accrued liabilities.”

Legal Matters

From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business.  As of March 31, 2019, there are no legal proceedings pending or threatened against the Company that management believes are likely to have a material adverse effect on the Company’s consolidated financial position or otherwise.

Line of Credit

The Company has a credit agreement with a bank that provides for a line of credit which is secured by the marketable securities the Company has with the bank.  The Company is permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed.  The available line of credit as of March 31, 2019 was approximately $96.7 million with an available interest rate of 4.0%.  The credit agreement is available to the Company until such time that either party terminates the arrangement at their discretion.  The Company has not utilized the line of credit to date.

NOTE 10. Revenue

Revenue is recognized when control of the promised goods or services are transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those goods or services.  The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

Contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers or the expected cost-plus margin.

Disaggregated Revenue

The following table presents the Company’s revenue disaggregated by revenue source:

	Three Months Ended
	March 31,
	2019		2018
Systems	$	42,772	$	56,102
Software licensing, support and maintenance		7,037		7,455
Parts		8,077		6,985
Services		3,006		2,554
Total revenue	$	60,892	$	73,096

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The following table represents a disaggregation of revenue by timing of revenue:

	Three Months Ended
	March 31,
	2019		2018
Point-in-time	$	56,591	$	69,396
Over-time		4,301		3,700
Total revenue	$	60,892	$	73,096

See Note 16 of the Notes to the Condensed Consolidated Financial Statements for additional discussion of the Company’s disaggregated revenue in detail.

Systems Revenue

Revenue from systems is recognized when the Company transfers control of the product to the customer.  To indicate transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must have the significant risks and rewards of ownership.  The Company generally transfers control for system sales when the customer or the customer’s agent picks up the system at the Company’s facility.  Payment for the majority of the Company’s systems have 80-90% of the invoice amount due within 30 days and the remaining amount due upon completion of installation, recalibration and qualification by the customer.  The Company provides an assurance warranty on its systems for a period of twelve to fifteen months against defects in material and workmanship.  The Company provides for the estimated cost of product warranties at the time revenue is recognized.

Depending on the terms of the systems arrangement, the Company may also defer the recognition of a portion of the consideration expected to be received because the Company has to satisfy a future obligation (e.g., installation, training and extended warranties). The Company uses an observable price to determine the standalone selling price for separate performance obligations or a cost-plus margin approach when one is not available.

Software Licensing, Support and Maintenance Revenue

Revenue from software licenses provides the customer with a right to use the software as it exists when made available to the customer.  Revenue from software licenses are recognized upfront at the point in time when the software is made available to the customer.  Revenue from licensing support and maintenance is recognized as the support and maintenance are provided, which is over the contract period.  Payment for software licensing, support and maintenance is generally due in 30 days.  

Parts Revenue

Revenue from parts is recognized when the Company transfers control of the product, which typically occurs when the Company ships the product from its facilities to the customer.  Payment for parts is generally due in 30 days.  

Services Revenue

Revenue from services primarily consists of service contracts, which provide additional maintenance coverage beyond the Company’s assurance warranty on its products, service labor, consulting and training.  Revenue from service contracts is recognized ratably over the term of the service contract.  Revenue from service labor, consulting and training is recognized as services are performed.  Payment for services is generally due in 30 days.  

Contract Liabilities

The Company records contract liabilities when the customer has been billed in advance of the Company completing its performance obligations. These amounts are recorded as deferred revenue in the Consolidated Balance Sheets.  

Changes in deferred revenue were as follows:

	Three Months Ended
	March 31,
	2019			2018
Balance, beginning of the period	$	8,080		$	7,206
Deferral of revenue		1,805			4,553
Recognition of deferred revenue		(1,198	)		(2,986	)
Balance, ending of the period	$	8,687		$	8,773

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NOTE 11. Share-Based Compensation

Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the three months ended March 31, 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2018		794		$	19.51
Granted		288		$	23.50
Vested		(124	)	$	14.21
Forfeited		(5	)	$	20.28
Nonvested at March 31, 2019		953		$	21.40

Included in the number of shares granted in the table directly above are 55 market performance-based restricted stock units (“MPRSUs”) granted to executives in 2019.  Vesting of these MPRSUs is contingent upon the Company meeting certain total shareholder return (“TSR”) levels as compared to a select peer group over three years from the year granted.  The 2019 MPRSUs cliff vest at the end of the three-year period and have a maximum potential to vest at 200% (111 shares) based on TSR performance.  The related share-based compensation expense is determined based on the estimated fair value of the underlying shares on the date of grant and is recognized straight-line over the vesting term.  The estimated fair value per share of the MPRSUs was $26.72.

As of March 31, 2019 and December 31, 2018, there was $14,034 and $9,517 of total unrecognized compensation cost related to restricted stock units granted under the Company’s stock plans, respectively.  That cost is expected to be recognized over a weighted average period of 2.6 years and 2.1 years for each of the respective periods.

NOTE 12. Other Expense (Income), Net

Other expense (income), net is comprised of the following:

	Three Months Ended March 31,
	2019			2018
Foreign currency exchange losses (gains), net	$	(381	)	$	183
Rental income		—			(1	)
Total other expense (income), net	$	(381	)	$	182

NOTE 13. Income Taxes

The following table provides details of income taxes:

	Three Months Ended March 31,
	2019			2018
Income before income taxes	$	8,795		$	17,674
Provision for income taxes	$	1,219		$	2,544
Effective tax rate		13.9	%		14.4	%

The income tax provision for the three months ended March 31, 2019 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year.  The changes in the Company’s effective tax rate for the three months ended March 31, 2019 as compared to the same period in 2018 are primarily due to changes in the mix of forecasted earnings by jurisdictions, Section 162 (m) adjustment and the tax-exempt interest.  The Company’s recorded effective tax rate is less than the U.S. statutory rate primarily due to a projected Foreign Derived Intangible Income Deduction from the Tax Act and federal research and development tax credits..

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The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt.  Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing the need for a valuation allowance.  As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets.  The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if appropriate.  The Company has a recorded valuation allowance against certain of its deferred tax assets of $3,172 as of March 31, 2019 and December 31, 2018.

NOTE 14. Earnings Per Share

Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period.  Diluted earnings per share is computed in the same manner and also gives effect to all dilutive common stock equivalent shares outstanding during the period.  Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive.  In accordance with U.S. GAAP, these shares were not included in calculating diluted earnings per share.

The following table sets forth the weighted average number of restricted stock units that have been excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive:

	Three Months Ended March 31,
	2019		2018
Restricted stock units		208		33
Total		208		33

The Company’s basic and diluted earnings per share amounts are as follows:

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	7,576	$	15,130
Denominator:
Basic earnings per share - weighted average shares    outstanding		30,916		31,662
Effect of potential dilutive securities:
Employee stock options and restricted stock    units - dilutive shares		350		655
Diluted earnings per share - weighted average shares    outstanding		31,266		32,317
Earnings per share:
Basic	$	0.25	$	0.48
Diluted	$	0.24	$	0.47

NOTE 15. Accumulated Other Comprehensive Loss

Comprehensive income includes net income, foreign currency translation adjustments and net unrealized gains and losses on available-for-sale debt securities.  See the Condensed Consolidated Statements of Comprehensive Income for the effect of the components of comprehensive income on the Company’s net income.

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The components of accumulated other comprehensive loss, net of tax, are as follows:

	Foreign currency translation adjustments		Net unrealized (gains) losses on marketable securities			Accumulated other comprehensive loss (income)
Balance at December 31, 2018	$	1,273	$	(10	)	$	1,263
Net current period other comprehensive income		518		(95	)		423
Reclassifications		—		—			—
Balance at March 31, 2019	$	1,791	$	(105	)	$	1,686

NOTE 16. Segment Reporting and Geographic Information

The Company is engaged in the design, development, manufacture and support of high-performance control metrology, defect inspection, advanced packaging lithography and data analysis systems used by microelectronics device manufacturers. The Company and its subsidiaries currently operate in a single operating segment: the design, development, manufacture and support of high-performance process control defect inspection and metrology, advanced packaging lithography and process control software systems used by microelectronics device manufacturers.  Therefore, the Company has one reportable segment.  The Company’s chief operating decision maker is the Chief Executive Officer (the “CEO”).  The CEO allocates resources and assesses performance of the business and other activities at the reportable segment level.

The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2019				2018
Systems and Software:
Process control	$	39,158	64	%	$	48,033	66	%
Lithography		3,614	6	%		8,069	11	%
Software licensing, support and maintenance		7,037	12	%		7,455	10	%
Parts		8,077	13	%		6,985	10	%
Services		3,006	5	%		2,554	3	%
Total revenue	$	60,892	100	%	$	73,096	100	%

The Company’s significant operations outside the United States include sales, service and application offices in Europe and Asia.  For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped.  Revenue by geographic region is as follows:

	Three Months Ended
	March 31,
	2019		2018
Revenue from third parties:
United States	$	9,131	$	9,068
Taiwan		11,031		14,467
Japan		3,940		4,130
China		16,044		17,971
South Korea		10,771		17,230
Singapore		2,016		4,282
Other Asia		993		1,917
Germany		1,850		1,324
Other Europe		5,116		2,707
Total revenue	$	60,892	$	73,096

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The following customers accounted for more than 10% of total revenue for the indicated periods:

	Three Months Ended March 31,
	2019			2018
Customer A		27.2	%		14.2	%
Customer B		—	%		11.2	%

NOTE 17. Shares Repurchase Authorization

In October 2018, the Board of Directors approved a new share repurchase authorization, which allows the Company to repurchase up to $40,000 worth of shares of its common stock.  The authorization provides for repurchases to be made in the open market or through negotiated transactions from time to time.  The share repurchase authorization has no expiration date and may be discontinued at any time.  During the three months ended March 31, 2019, the Company repurchased 37 shares of common stock under the share repurchase authorization and those shares were subsequently retired.  At March 31, 2019, there was $32,494 available for future share repurchases.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations 

Certain statements in this Quarterly Report on Form 10-Q (this “Form 10-Q”) are forward-looking statements, including those concerning our business momentum and future growth, acceptance of our products and services, our ability to deliver both products and services consistent with our customers’ demands and expectations and to strengthen our market position, our expectations of the semiconductor market outlook, future revenue, gross profits, research and development and engineering expenses, selling, general and administrative expenses, product introductions, technology development, manufacturing practices, cash requirements, our dependence on certain significant customers and anticipated trends and developments in and management plans for our business and the markets in which we operate, our anticipated revenue as a result of acquisitions, and our ability to be successful in managing our cost structure and cash expenditures and results of litigation.  The statements contained in this Form 10-Q that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and within the meaning of the Private Securities Litigation Reform Act of 1995.  Forward-looking statements may be identified by words such as, but not limited to, “anticipate,” “believe,” “expect,” “intend,” “plan,” “should,” “may,” “could,” “will” and words or phrases of similar meaning, as they relate to our management or us.

The forward-looking statements contained herein reflect our expectations with respect to future events and are subject to certain risks, uncertainties and assumptions.  Actual results may differ materially from those included in such forward-looking statements for a number of reasons including, but not limited to, the following: variations in the level of orders which can be affected by general economic conditions; seasonality and growth rates in the semiconductor manufacturing industry and in the markets served by our customers; the global economic and political climates; difficulties or delays in product functionality or performance; the delivery performance of sole source vendors; the timing of future product releases; failure to respond adequately to either changes in technology or customer preferences; changes in pricing by us or our competitors; our ability to manage growth; changes in management; risk of nonpayment of accounts receivable; changes in budgeted costs; our ability to leverage our resources to improve our position in our core markets, to weather difficult economic environments, to open new market opportunities and to target high-margin markets; the strength/weakness of the back-end and/or front-end semiconductor market segments; our ability to successfully integrate acquired businesses into our business and fully realize, or realize within the expected time frame, the expected combination benefits from the acquisitions; the imposition of tariffs or trade restrictions and costs, burdens and restrictions associated with other governmental actions and the “Risk Factors” set forth in Item 1A in our 2018 10-K and any subsequently filed Quarterly Reports on Form 10-Q.  The forward-looking statements reflect our position as of the date of this report and we undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Critical Accounting Policies

The preparation of condensed consolidated financial statements and related disclosures in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make judgments, assumptions and estimates that affect the amounts reported.  Certain of these significant accounting policies are considered to be critical accounting policies, as defined below.

A critical accounting policy is defined as one that is both material to the presentation of our condensed consolidated financial statements and requires management to make difficult, subjective or complex judgments that could have a material effect on our financial condition or results of operations.  Specifically, these policies have the following attributes: (1) we are

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required to make judgments and assumptions about matters that are highly uncertain at the time of the estimate; and (2) different estimates we could reasonably have used, or changes in the estimate that are reasonably likely to occur, could have a material effect on our financial position and results of operations.

Estimates and assumptions about future events and their effects cannot be determined with certainty.  We base our estimates on historical experience and on various other assumptions believed to be applicable and reasonable under the circumstances.  These estimates may change as new events occur, as additional information is obtained and as our operating environment changes.  In addition, management is periodically faced with uncertainties, the outcomes of which are not within our control and will not be known for prolonged periods of time. Certain of these uncertainties are discussed in our 2018 10-K in the Items entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”  Based on a critical assessment of our accounting policies and the underlying judgments and uncertainties affecting the application of those policies, we believe that our condensed consolidated financial statements are fairly stated in accordance with U.S. GAAP and provide a fair presentation of our financial position and results of operations.

For more information, please see our critical accounting policies as previously disclosed in our 2018 10-K.

During the quarter ended March 31, 2019, the Company adopted the provisions of ASC 842, “Leases.”  See Note 1 to the Condensed Consolidated Financial Statements included in this Form 10-Q regarding the impact of recent accounting pronouncements on our financial position and results of operations and Note 5, “Leasing Arrangements,” to the Condensed Consolidated Financial Statements included in this Form 10-Q for a discussion of the impact of the adoption of ASC 842 on our financial statements and accounting policies.

Overview

We are a worldwide leader in the design, development, manufacture and support of process control tools that perform macro-defect inspections and metrology, lithography systems, and process control analytical software used by semiconductor and advanced packaging device manufacturers.  We deliver comprehensive solutions throughout the semiconductor fabrication process with our families of proprietary products that provide critical yield-enhancing information, enabling microelectronic device manufacturers to drive down costs and time to market of their devices.  We provide process and yield management solutions used in both wafer processing facilities, often referred to as “front-end” and device packaging and test facilities, or “back-end” manufacturing, through a portfolio of standalone systems for macro-defect inspection, lithography, probe card test and analysis, and transparent and opaque thin film measurements.  All of our systems feature sophisticated software and production-worthy automation.  In addition, our advanced process control software portfolio includes powerful solutions for standalone tools, groups of tools, or factory-wide suites to enhance productivity and achieve significant cost savings.  Our systems are backed by worldwide customer service and applications support.

Our business is affected by the annual spending patterns of our customers on semiconductor capital equipment.  The amount that our customers devote to capital equipment spending depends on a number of factors, including general worldwide economic conditions, as well as other economic drivers such as personal computers, mobile devices, data centers, artificial intelligence and automotive sales.  Current forecasts by industry analysts for the semiconductor device manufacturing industry project capital equipment spending to be down 15-18% for 2019 as compared to 2018.  Our revenue and profitability tend to follow the trends of certain segments within the semiconductor market.

Historically, a significant portion of our revenue in each quarter and year has been derived from sales to relatively few customers, and we expect this trend to continue.  For the three months ended March 31, 2019 and for the years ended December 31, 2018, 2017 and 2016, aggregate sales to customers that individually represented at least five percent of our revenue accounted for 39.6%, 18.3%, 27.2%, and 34.5% of our revenue, respectively.

We do not have purchase contracts with any of our customers that obligate them to continue to purchase our products, and they could cease purchasing products from us at any time.  A delay in purchase or cancellation by any of our large customers could cause quarterly revenue to vary significantly.  In addition, during any given quarter, a significant portion of our revenue may be derived from the sale of a relatively small number of systems.  The following table presents the average selling price range for our systems:

System	Average Selling Price Per System
Process control	$250,000 to $2.6 million
Lithography steppers	$2.6 million to $8.5 million

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A significant portion of our revenue is derived from customers outside of the United States.  A substantial portion of our international sales are denominated in U.S. dollars.  We expect that revenue generated from customers outside of the United States will continue to account for a significant percentage of our revenue.

The sales cycle for our systems typically ranges from six to twenty-four months and can be longer when our customers are evaluating new technology.  Due to the length of these cycles, we invest significantly in research and development and sales and marketing in advance of generating revenue related to these investments.

Results of Operations for the Three Month Periods Ended March 31, 2019 and 2018

Revenue.  Our revenue is primarily derived from the sale of our systems, services, spare parts and software licensing.  Our revenue of $60.9 million decreased 16.7% for the three months ended March 31, 2019 as compared to the same period in 2018, in which revenue totaled $73.1 million.

The following table lists, for the periods indicated, the different sources of our revenue in dollars (thousands) and as percentages of our total revenue:

	Three Months Ended
	March 31,
	2019				2018
Systems and Software:
Process control	$	39,158	64	%	$	48,033	66	%
Lithography		3,614	6	%		8,069	11	%
Software licensing, support and maintenance		7,037	12	%		7,455	10	%
Parts		8,077	13	%		6,985	10	%
Services		3,006	5	%		2,554	3	%
Total revenue	$	60,892	100	%	$	73,096	100	%

Total systems and software revenue decreased $13.7 million for the three months ended March 31, 2019, as compared to the three months ended March 31, 2018.  Process control system revenue decreased $8.9 million for the three months ended March 31, 2019, as compared to the same period in 2018, primarily due to lower inspection system sales in the 2019 period.  Lithography system revenue decreased $4.5 million for the three months ended March 31, 2019, as compared to the same period in 2018, primarily due to the shipment of a JetStep G system during the first half of 2018, which has a higher average selling price.  Software revenue decreased $0.4 million for the three months ended March 31, 2019, as compared to the same period in 2018.  Systems revenue generated by our latest product releases and major enhancements in each of our product families amounted to 72% of total revenue for the three months ended March 31, 2019, as compared to 76% of total revenue for the three months ended March 31, 2018.  The year-over-year increase in total parts and services revenue for the three months ended March 31, 2019 is primarily due to increased spending by our customers on system upgrades and repairs of existing systems.  Parts and services revenue are generated from parts sales, maintenance service contracts, system upgrades, as well as from time and material billable service calls.

Deferred revenue of $7.5 million was recorded in the Condensed Consolidated Balance Sheets under the caption “Deferred revenue” and $1.2 million was recorded under the caption “Other non-current liabilities” at March 31, 2019.  Deferred revenue primarily consisted of $6.0 million for deferred maintenance agreements and $2.7 million for outstanding deliverables.

Gross Profit.  Our gross profit has been and will continue to be affected by a variety of factors, including manufacturing efficiencies, provision for excess and obsolete inventory, pricing by competitors or suppliers, new product introductions, production volume, customization and reconfiguration of systems, international and domestic sales mix, system and software product mix and parts and service margins.  Our gross profit was $32.0 million for the three months ended March 31, 2019, as compared to $42.4 million for the same period in 2018.  Our gross profit represented 52.6% and 58.0% of our revenue for the three months ended March 31, 2019 and 2018.  The decrease in gross profit as a percentage of revenue for the three months ended March 31, 2019, as compared to the same period in 2018, is primarily due to lower volume of system and software sales as well as product mix.

Operating Expenses.  Major components of operating expenses include research and development, as well as selling, general and administrative expenses.

Research and Development.  Our research and development expenses were $12.7 million for the three months ended March 31, 2019, as compared to $11.8 million for the same period in 2018.  Research and development expenses

22

represented 20.9% and 16.1% of our revenue for the three months ended March 31, 2019 and 2018.  Research and development expenses increased for the year-over-year periods due to increases in new product initiatives.

Selling, General and Administrative.  Our selling, general and administrative expenses were $11.3 million for the three months ended March 31, 2019, as compared to $12.8 million for the same period in 2018.  Selling, general and administrative expenses represented 18.6% and 17.5% of our revenue for the three months ended March 31, 2019 and 2018.  The year-over-year dollar decrease for the three months ended March 31, 2019 in selling, general and administrative expenses was primarily due to a decrease in sales commissions and a loss recorded for the misappropriation of payroll taxes by a third-party accountant recorded in 2018.

Income Taxes. We recorded an income tax provision of $1.2 million for the three months ended March 31, 2019.  Our effective tax rate of 13.9% differs from the statutory rate of 21% for the three months ended March 31, 2019 primarily due to a projected Foreign Derived Intangible Income Deduction from the Tax Act and federal research and development tax credits.  For the three months ended March 31, 2018, we recorded an income tax provision of $2.5 million.

Our future effective income tax rate depends on various factors, such as impacts of the Tax Act, possible further tax legislation, the geographic composition of our pre-tax income, the amount of our pre-tax income as business activities fluctuate, non-deductible expenses incurred in connection with acquisitions, and research and development tax credits as a percentage of aggregate pre-tax income.

We currently have a partial valuation allowance recorded for certain foreign and state loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt.  Each quarter we assess the likelihood that we will be able to recover our deferred tax assets primarily relating to state research and development credits.  We consider available evidence, both positive and negative, including historical levels of income, expectations and risks associated with estimates of future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for a valuation allowance.  As a result of our analysis, we concluded that it is more likely than not that a portion of our net deferred tax assets will not be realized.  Therefore, we continue to provide a valuation allowance against certain net deferred tax assets.  We continue to monitor available evidence and may reverse some or all of the valuation allowance in future periods, if appropriate.

Liquidity and Capital Resources

At March 31, 2019, we had $170.8 million of cash, cash equivalents and marketable securities and $311.9 million in working capital.  At December 31, 2018, we had $175.1 million of cash, cash equivalents and marketable securities and $305.9 million in working capital.

Operating activities used $1.6 million in net cash and cash equivalents for the three months ended March 31, 2019.  The net cash and cash equivalents used by operating activities during the three months ended March 31, 2019 resulted primarily from a decrease in cash used in operating assets and liabilities of $13.6 million, offset by net income, adjusted to exclude the effect of non-cash operating charges of $12.0 million.  This decrease was primarily attributed to increases in inventories.  Operating activities provided $4.6 million in net cash and cash equivalents for the three months ended March 31, 2018.  The net cash and cash equivalents provided by operating activities during the three months ended March 31, 2018 resulted primarily from net income, adjusted to exclude the effect of non-cash operating charges of $19.5 million, partially offset by a decrease in cash provided from operating assets and liabilities of $14.9 million.  

Net cash and cash equivalents of $9.2 million were used in investing activities during the three months ended March 31, 2019 primarily for the purchase of marketable securities of $22.1 million and capital expenditures of $1.3 million, offset by proceeds from sales of marketable securities of $14.3 million.  Net cash and cash equivalents used in investing activities of $4.2 million during the three months ended March 31, 2018 resulted from the purchase of marketable securities of $57.1 million and capital expenditures of $1.4 million, offset by proceeds from sales of marketable securities of $54.4 million.

Net cash and cash equivalents used in financing activities during the three months ended March 31, 2019 of $1.3 million for the purchase of shares of our common stock under share repurchase authorizations of $0.7 million and tax payments related to shares withheld for share-based compensation plans of $0.6 million.  For the three months ended March 31, 2018, financing activities used $0.7 million, which resulted from tax payments related to shares withheld for share-based compensation plans of $0.8 million, partially offset by proceeds from sales of shares through share-based compensation plans of $0.1 million.

From time to time, we evaluate whether to acquire new or complementary businesses, products and/or technologies.  We may fund all of or a portion of the price of these investments or acquisitions in cash, stock, or a combination of cash and stock.

We entered into a convertible loan agreement with Simax Precision Technologies Limited (“Simax”) on May 31, 2018.  Simax may borrow up to $15 million in multiple promissory notes from us, subject to limitations.  We expect to be a

23

supplier of lithography modules to Simax which is focused on the manufacture, sale and service of lithography systems.  As of March 31, 2019, Simax has borrowed $5 million from us under the convertible loan agreement. See Note 7 in the accompanying Notes to the Condensed Consolidated Financial Statements included in this Form 10-Q for further information.

In October 2018, the Board of Directors approved a new share repurchase authorization, which allows us to repurchase up to $40 million worth of shares of our common stock.  The authorization provides for repurchases to be made in the open market or through negotiated transactions from time to time.  The share repurchase authorization has no expiration date and may be discontinued at any time.  During the three months ended March 31, 2019, we repurchased 37 thousand shares of common stock under our share repurchase authorization and those shares were subsequently retired.  At March 31, 2019, there was $32,494 available for future share repurchases.  For further information, see Note 17 in the accompanying Notes to the Condensed Consolidated Financial Statements included in this Form 10-Q.

We have a credit agreement with a bank that provides for a line of credit that is secured by the marketable securities we have with the bank.  We are permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed.  As of March 31, 2019, the available line of credit was approximately $96.7 million with an available interest rate of 4.0%.  The credit agreement is available to us until such time that either party terminates the arrangement at its discretion.  To date, we have not utilized this line of credit.

Our future capital requirements will depend on many factors, including the timing and amount of our revenue and our investment decisions, which will affect our ability to generate additional cash.  We expect that our existing cash, cash equivalents, marketable securities and availability under our line of credit will be sufficient to meet our anticipated cash requirements for working capital, capital expenditures and other cash needs for the next 12 months following the filing of this Form 10-Q.  Thereafter, if cash generated from operations and financing activities is insufficient to satisfy our working capital requirements, we may seek additional funding through bank borrowings, sales of securities or other means.  There can be no assurance that we will be able to raise any such capital on terms acceptable to us or at all.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Interest Rate and Credit Market Risk

We are exposed to changes in interest rates and market liquidity including our investments in certain available-for-sale debt securities.  Our available-for-sale securities consist of fixed and variable rate income investments, such as municipal notes, municipal bonds and corporate bonds.  We continually monitor our exposure to changes in interest rates, market liquidity and credit ratings of issuers for our available-for-sale securities.  It is possible that we are at risk if interest rates, market liquidity or credit ratings of issuers change in an unfavorable direction.  The magnitude of any gain or loss will be a function of the difference between the fixed or variable rate of the financial instrument and the market rate, and our financial condition and results of operations could be materially affected.  Based on a sensitivity analysis performed on our financial investments held as of March 31, 2019, an immediate adverse change of 10% in interest rates (e.g., a change from 3.00% to 3.30%) would result in an immaterial decrease in the fair value of our available-for-sale debt securities and would not have a material impact on our consolidated financial position, results of operations or cash flows.

Foreign Currency Risk

A substantial portion of our systems and software sales are denominated in U.S. dollars with the exception of Japan.  As a result, we have relatively little exposure to foreign currency exchange risk with respect to these sales. Substantially all of our sales in Japan are denominated in Japanese yen.  From time to time, we may enter into forward exchange contracts to economically hedge a portion, but not all, of the existing and anticipated foreign currency denominated transactions expected to occur within 12 months.  The change in fair value of the forward exchange contracts is recognized under the caption “Other (income) expense” in the Condensed Consolidated Statements of Operations for each reporting period. As of March 31, 2019, we had twenty-three forward exchange contracts outstanding with a total notional contract value of $5.8 million.  We do not use derivative financial instruments for trading or speculative purposes.

We have branch operations in Taiwan, Singapore and South Korea and wholly-owned subsidiaries in Europe, Japan and China.  Our international subsidiaries and branches operate primarily using local functional currencies.  Our exposure to foreign currency exchange rate fluctuations arise from intercompany balances between our U.S. headquarters and that of our foreign owned entities. Our intercompany balances are denominated in U.S. dollars. Since each foreign entity’s functional currency is generally denominated in its local currency, there is exposure to foreign exchange risk when the foreign entity’s intercompany balance is remeasured at a reporting date, resulting in transaction gains or losses. The intercompany balance, exposed to foreign currency risk, as of March 31, 2019 was approximately $21.6 million. A hypothetical change of 10% in the relative value of the U.S. dollar versus local functional currencies could result in approximately $0.4 million in foreign currency exchange losses / (gains) which would be recorded as non-operating expense in other expense (income) in our

24

Condensed Consolidated Statements of Operations.  We cannot accurately predict future exchange rates or the overall impact of future exchange rate fluctuations on our business, results of operations and financial condition.

Item 4. Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time period specified in SEC rules and forms.  These controls are procedures are also designed to ensure that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.  In designing and evaluating disclosure controls and procedures, we have recognized that any control and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.  Management is required to exercise judgment in evaluating its controls and procedures.

Scope of the Controls Evaluation

The evaluation of our disclosure controls and procedures included a review of the controls’ objectives and design, our implementation of the controls and the effect of the controls on the information generated for use in this Form 10-Q.  In the course of the evaluation, we sought to identify data errors, control problems or acts of fraud and confirm that appropriate corrective actions, if any, including process improvements, were being undertaken.  This type of evaluation is performed on a quarterly basis so that the conclusions of management, including the CEO and CFO, concerning the effectiveness of the controls can be reported in our Quarterly Reports on Form 10-Q and in our Annual Reports on Form 10-K.  Many of the components of our disclosure controls and procedures are also evaluated on an ongoing basis by other personnel in our accounting, finance, internal audit and legal functions.  The overall goals of these various evaluation activities are to monitor our disclosure controls and procedures and to modify them on an ongoing basis as necessary.  A control system can provide only reasonable, not absolute, assurance that the control system’s objectives will be met.  Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected.  Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.  Because of inherent limitations in a cost effective control system, misstatements due to error or fraud may occur and not be detected.

Conclusions

As of March 31, 2019, an evaluation of our disclosure controls and procedures was carried out under the supervision and with the participation of our management, including the CEO and CFO.  Based on this evaluation, the CEO and CFO have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of the end of the period covered by this Form 10-Q.

Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the Company’s quarter ended March 31, 2019 that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

PART II OTHER INFORMATION

Item 1. Legal Proceedings

For a description of our previously reported legal proceedings refer to Part I, Item 3, “Legal Proceedings” in our 2018 10-K.

From time to time we are subject to ordinary routine litigation incidental to our business.  As of March 31, 2019, there are no legal proceedings pending or threatened against the Company that management believes are likely to have a material adverse effect on the Company’s consolidated financial position or otherwise.

Item 1A. Risk Factors

There have been no material changes to our risk factors as discussed in Part I, Item 1A, “Risk Factors” in our 2018 10-K.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

In October 2018, the Board of Directors approved a new share repurchase authorization, which allows us to repurchase up to $40 million worth of shares of our common stock.  The authorization provides for repurchases to be made in the open market or through negotiated transactions from time to time.  The share repurchase authorization has no expiration date and may be discontinued at any time.  During the three months ended March 31, 2019, we repurchased 37.5 thousand shares of common stock under our share repurchase authorization and those shares were subsequently retired.  At March 31, 2019, there was $32.5 million available for future share repurchases.  For further information, see Note 17 in the accompanying Notes to the Consolidated Financial Statements.

In addition to our share repurchase program, we withhold common stock shares associated with net share settlements to cover tax withholding obligations upon the vesting of restricted stock unit awards and stock option exercises under the Company’s equity incentive program. During the three months ended March 31, 2019, we withheld 27.3 thousand shares through net share settlements.  For the three month period ended March 31, 2019, net share settlements cost $0.6 million. Please refer to Note 11 of the Notes to Consolidated Financial Statements for further discussion regarding our equity incentive plan.

The following table provides details of common stock purchased during the three month period ended March 31, 2018 (in thousands, except per share data):

Period	Total Number of Shares Purchased (1)		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program		Maximum Approximate Dollar Value of Shares that May Yet be Purchased Under the Program
January 1, 2019 - January 31, 2019		55.0	$	20.43		37	$	32,494
February 1, 2019 - February 28, 2019		8.2		22.36		—	$	32,494
March 1, 2019 - March 31, 2019		1.6		22.17		—	$	32,494
Three months ended September 30, 2018		64.8	$	20.72		37	$	32,494
1 Includes Shares withheld through net share settlements.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit No.	Description
31.1	Certification of Michael P. Plisinski, Chief Executive Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
31.2	Certification of Steven R. Roth, Chief Financial Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Michael P. Plisinski, Chief Executive Officer of Rudolph Technologies, Inc.
32.2	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Steven R. Roth, Chief Financial Officer of Rudolph Technologies, Inc.
101.INS	XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

27

SIGNATURES

Pursuant to the requirements 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.

		Rudolph Technologies, Inc.
Date:	May 7, 2019	By:	/s/  Michael P. Plisinski
		Michael P. Plisinski
		Chief Executive Officer
Date:	May 7, 2019	By:	/s/  Steven R. Roth
		Steven R. Roth
		Senior Vice President, Chief Financial Officer and Principal Accounting Officer

28

EX-31.1

Exhibit 31.1

Rule 13a-14(a) Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael P. Plisinski, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rudolph Technologies, 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: May 7, 2019

By:	/s/ MICHAEL P. PLISINSKI
	Michael P. Plisinski Chief Executive Officer

EX-31.2

Exhibit 31.2

Rule 13a-14(a) Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Steven R. Roth, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rudolph Technologies, 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: May 7, 2019

By:	/s/ STEVEN R. ROTH
	Steven R. Roth Senior Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael P. Plisinski, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Rudolph Technologies, Inc. on Form 10-Q for the quarter ended March 31, 2019 fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Rudolph Technologies, Inc.

Date: May 7, 2019

By:	/s/  MICHAEL P. PLISINSKI
	Michael P. Plisinski Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Steven R. Roth, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Rudolph Technologies, Inc. on Form 10-Q for the quarter ended March 31, 2019 fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, and that the information contained in the Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Rudolph Technologies, Inc.

Date: May 7, 2019

By:	/s/  STEVEN R. ROTH
	Steven R. Roth Senior Vice President and Chief Financial Officer

XML

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2019	Apr. 16, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	RUDOLPH TECHNOLOGIES INC
Trading Symbol	RTEC
Entity Central Index Key	0001094392
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		31,026,385

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 100,168	$ 112,388
Marketable securities	70,602	62,684
Accounts receivable, less allowance of $1,032 and $691	66,357	64,194
Inventories, net	103,989	96,820
Income taxes receivable	5,046	6,111
Prepaid expenses and other current assets	9,958	8,710
Total current assets	356,120	350,907
Property, plant and equipment, net	18,599	18,874
Operating lease right-of-use assets	13,734
Goodwill	22,495	22,495
Identifiable intangible assets, net	7,061	7,448
Other assets	18,301	18,316
Total assets	436,310	418,040
Current liabilities:
Accounts payable and accrued liabilities	26,391	30,681
Deferred revenue	7,491	6,767
Current operating lease obligations	2,458
Other current liabilities	7,852	7,543
Total current liabilities	44,192	44,991
Non-current operating lease obligations	12,742
Other non-current liabilities	9,514	11,161
Total liabilities	66,448	56,152
Commitments and contingencies
Stockholders’ equity:
Common stock	31	31
Additional paid-in capital	370,714	369,893
Accumulated other comprehensive loss	(1,686)	(1,263)
Retained earnings (accumulated deficit)	803	(6,773)
Total stockholders’ equity	369,862	361,888
Total liabilities and stockholders’ equity	$ 436,310	$ 418,040

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 1,032	$ 691

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements Of Operations [Abstract]
Revenue	$ 60,892	$ 73,096
Cost of revenue	28,873	30,675
Gross profit	32,019	42,421
Operating expenses:
Research and development	12,718	11,783
Selling, general and administrative	11,306	12,793
Amortization	387	380
Total operating expenses	24,411	24,956
Operating income	7,608	17,465
Interest income, net	(806)	(391)
Other (income) expense, net	(381)	182
Income before income taxes	8,795	17,674
Provision for income taxes	1,219	2,544
Net income	$ 7,576	$ 15,130
Earnings per share:
Basic	$ 0.25	$ 0.48
Diluted	$ 0.24	$ 0.47
Weighted average shares outstanding:
Basic	30,916	31,662
Diluted	31,266	32,317

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statement Of Comprehensive Income [Abstract]
Net income	$ 7,576	$ 15,130
Other comprehensive income:
Change in net unrealized gains on marketable securities, net of tax	95	23
Change in currency translation adjustments	(518)	632
Total comprehensive income	$ 7,153	$ 15,785

XML

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings (Accumulated Deficit) [Member]
Balance at Dec. 31, 2017	$ 333,154	$ 32	$ 386,196	$ (1,205)	$ (51,869)
Balance, Shares at Dec. 31, 2017		31,604
Issuance of shares through share-based compensation plans, net	122		122
Issuance of shares through share-based compensation plans, net, Shares		169
Net income	15,130				15,130
Share-based compensation	1,507		1,507
Share-based compensation plan withholdings	(839)		(839)
Share-based compensation plan withholdings, Shares		(31)
Currency translation	632			632
Unrealized gain on investments	23			23
Balance at Mar. 31, 2018	349,729	$ 32	386,986	(550)	(36,739)
Balance, shares at Mar. 31, 2018		31,742
Balance at Dec. 31, 2018	361,888	$ 31	369,893	(1,263)	(6,773)
Balance, Shares at Dec. 31, 2018		30,906
Issuance of shares through share-based compensation plans, net, Shares		103
Repurchase of common stock	(744)		(744)
Repurchase of common stock, Shares		(37)
Net income	7,576				7,576
Share-based compensation	2,163		2,163
Share-based compensation plan withholdings	(598)		(598)
Share-based compensation plan withholdings, Shares		(27)
Currency translation	(518)			(518)
Unrealized gain on investments	95			95
Balance at Mar. 31, 2019	$ 369,862	$ 31	$ 370,714	$ (1,686)	$ 803
Balance, shares at Mar. 31, 2019		30,945

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 7,576	$ 15,130
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Amortization of intangibles	387	380
Depreciation	1,254	1,310
Foreign currency exchange (loss) gain	(381)	183
Change in fair value of contingent consideration		318
Share-based compensation	2,163	1,507
Provision for doubtful accounts and inventory valuation	1,028	705
Changes in operating assets and liabilities	(13,593)	(14,894)
Net cash and cash equivalents (used in) provided by operating activities	(1,566)	4,639
Cash flows from investing activities:
Purchases of marketable securities	(22,142)	(57,134)
Proceeds from sales of marketable securities	14,295	54,404
Purchases of property, plant and equipment	(1,320)	(1,442)
Net cash and cash equivalents used in investing activities	(9,167)	(4,172)
Cash flows from financing activities:
Purchase of common stock	(744)
Tax payments related to shares withheld for share-based compensation plans	(598)	(839)
Issuance of shares through share-based compensation plans		122
Net cash and cash equivalents used in financing activities	(1,342)	(717)
Effect of exchange rate changes on cash and cash equivalents	(145)	535
Net increase in cash and cash equivalents	(12,220)	285
Cash and cash equivalents at beginning of period	112,388	67,770
Cash and cash equivalents at end of period	100,168	68,055
Supplemental disclosure of cash flow information:
Income taxes paid	$ 114	$ 249

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Basis of Presentation

3 Months Ended

Mar. 31, 2019

Organization And Nature Of Operations [Abstract]

Basis of Presentation

NOTE 1. Basis of Presentation

The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared by Rudolph Technologies, Inc. (the “Company” or “Rudolph”) and in the opinion of management reflect all adjustments, consisting of normal recurring accruals, necessary for their fair presentation in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  Preparing financial statements requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes.  Actual amounts could differ materially from reported amounts.  The interim results for the three month period ended March 31, 2019 are not necessarily indicative of results to be expected for the entire year or any future periods.  This interim financial information should be read in conjunction with the financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (“2018 10-K”) filed with the Securities and Exchange Commission (“SEC”) on February 15, 2019.  The accompanying Condensed Consolidated Balance Sheets at December 31, 2018 has been derived from the audited consolidated financial statements included in the 2018 10-K.

Recent Accounting Pronouncements

Recently Adopted

Effective January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2018-07, “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting.”  This ASU expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees.  An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost.  The ASU is effective for the fiscal years beginning after December 15, 2018, including interim periods within that fiscal year.  The adoption of ASU No. 2018-07 did not have a material impact on the Company’s consolidated financial position, results of operations, and cash flows.  

Effective January 1, 2019, the Company adopted ASU No. 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.”  The new guidance allows companies to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the “Tax Act”) from accumulated other comprehensive income to retained earnings.  The guidance also requires certain new disclosures regardless of a company’s election.  The standard is effective for annual periods beginning after December 15, 2018 and for interim periods within those annual periods, with earlier adoption permitted.  The adoption of ASU No. 2018-02 did not have a material impact on the Company’s consolidated financial position, results of operations, and cash flows.

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842).” ASU No. 2016-02 requires that lessees recognize virtually all of their leases on the balance sheet, by recording a right-of-use asset and lease liability. On January 1, 2019, the Company adopted ASU No. 2016-02 using the modified retrospective method which applies the provisions of the standard at the effective date without adjusting the comparative periods presented.  The Company also elected the package of practical expedients.

There was not a cumulative-effect adjustment to the Company’s beginning retained earnings as a result of adopting ASU No. 2016-02. The Company has recognized additional operating lease assets and obligations of $14.4 million as of January 1, 2019. The Company elected to not reassess prior conclusions related to the identification, classification and accounting for initial direct costs for leases that commenced prior to January 1, 2019. For additional disclosure and detail, see Note 5 of the Notes to the Condensed Consolidated Financial Statements, “Leasing Arrangements.”

Recently Issued

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.”  This ASU is part of the FASB’s larger disclosure framework project intended to improve the effectiveness of financial statement footnote disclosure.  ASU No. 2018-13 modifies required fair value disclosures related primarily to level 3 investments.  This ASU is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods.  The adoption of ASU No. 2018-13 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows.

In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting.”  This ASU amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under Accounting Standards Codification (“ASC”) 718.  The ASU is effective for the fiscal years beginning after December 15, 2019 and for interim periods within those fiscal years.  The adoption of ASU No. 2017-09 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows, if any.

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.”  This ASU eliminates Step 2 from the goodwill impairment test.   Accordingly, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss will be recognized in an amount equal to the excess, limited to the total amount of goodwill allocated to the reporting unit.  The ASU is effective for the fiscal years beginning after December 15, 2019 and for interim periods within those fiscal years.  The Company is currently evaluating the effect the adoption of ASU No. 2017-04 will have on its consolidated financial position, results of operations, and cash flows, if any.

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments – Credit Losses (Topic 326),” which introduced new guidance for the accounting for credit losses on instruments within its scope.  Given the breadth of that scope, this ASU will impact both financial services and non-financial services entities.  The standard is effective for fiscal years beginning after December 15, 2020.  The Company is currently evaluating the effect the adoption of ASU No. 2016-13 will have on its consolidated financial position, results of operations, and cash flows, if any.

Recently issued accounting guidance not discussed above is not applicable.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 2. Fair Value Measurements

The Company applies a three-level valuation hierarchy for fair value measurements.  This hierarchy prioritizes the inputs into three broad levels.  Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities.  Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability.  Level 3 inputs are unobservable inputs based on management’s assumptions used to measure assets and liabilities at fair value.  A financial asset’s or liability’s fair value measurement classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2019 and December 31, 2018:

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2019
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	70,602	$	—	$	70,602	$	—
Foreign currency forward contracts		13		—		13		—
Total assets	$	70,615	$	—	$	70,615	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Total liabilities	$	2,060	$	—	$	—	$	2,060
December 31, 2018
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	62,684	$	—	$	62,684	$	—
Total assets	$	62,684	$	—	$	62,684	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Foreign currency forward contracts		32		—		32		—
Total liabilities	$	2,092	$	—	$	32	$	2,060

Level 1 inputs are based on quoted market prices that are available in active markets.  The Company does not have any recurring financial assets and liabilities that are recorded in its Condensed Consolidated Balance Sheets as of March 31, 2019 and December 31, 2018 that are classified as Level 1 inputs.

The Company’s available-for-sale debt securities classified as Level 2 are valued using observable inputs to quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency.  The foreign currency forward contracts are primarily measured based on the foreign currency spot and forward rates quoted by the banks or foreign currency dealers.  Investment prices are obtained from third party pricing providers, which model prices utilizing the above observable inputs, for each asset class.

Level 3 liabilities consisted of contingent consideration related to an acquisition for which the Company uses a discounted cash flow model to value these liabilities.  The Level 3 assumptions used in the discounted cash flow model for the contingent consideration included projected revenue, timing of cash flows and estimates of discount rates of 9.2% and 9.4% for the three months ended March 31, 2019 and 2018, respectively.  A significant decrease in the projected revenue or increase in discount rates could result in a significantly lower fair value measurement for the contingent consideration.  

This table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2019:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2018	$	2,060
Additions		—
Payments		—
Transfer into (out of) Level 3		—
Balance at March 31, 2019	$	2,060

See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.

Fair Value of Other Financial Instruments

The carrying value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value because of the short-term maturity of these instruments.  The estimated fair value of these obligations is based primarily on a market approach, comparing the Company’s interest rates to those rates the Company believes it would reasonably receive upon re-entry into the market.  Judgment is required to estimate the fair value, using available market information and appropriate valuation methods.

The carrying amount of the convertible notes receivable approximates fair value based on current interest rates for instruments with similar characteristics.  Convertible notes receivable are initially recognized at fair value. The Company does not subsequently adjust the fair value of these convertible notes receivable unless it is determined that the convertible notes receivable are impaired. The Company considers the issuer’s financial condition, payment history, and other relevant factors when assessing the collectability of a convertible note and to reserve the portion of such convertible note for which collection does not appear likely. Interest income is recognized as earned.

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Marketable Securities

3 Months Ended

Mar. 31, 2019

Marketable Securities [Abstract]

Marketable Securities

NOTE 3. Marketable Securities

The Company has evaluated its investment policies and determined that all of its marketable securities, which are comprised of debt securities, are to be classified as available-for-sale.  The Company’s available-for-sale debt securities are carried at fair value, with the unrealized gains and losses reported in Stockholders’ equity under the caption “Accumulated other comprehensive loss.”  Realized gains and losses on available-for-sale securities are included in “Other expense (income)” on the Condensed Consolidated Statements of Operations.  The Company records other-than-temporary impairment charges for its available-for-sale debt securities when it intends to sell the securities, it is more-likely-than not that it will be required to sell the securities before a recovery, or when it does not expect to recover the entire amortized cost basis of the securities.  The cost of securities sold is based on the specific identification method.

The Company has determined that the gross unrealized losses on its marketable securities at March 31, 2019 and December 31, 2018 are temporary in nature.  The Company reviews its investment portfolio to identify and evaluate marketable securities that have indications of possible impairment.  Factors considered in determining whether a loss is other-than-

temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the securities for a period of time sufficient to allow for any anticipated recovery in market value.

At March 31, 2019 and December 31, 2018, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2019
Municipal notes and bonds	$	70,481	$	126	$	5	$	70,602
Total marketable securities	$	70,481	$	126	$	5	$	70,602
December 31, 2018
Municipal notes and bonds	$	62,681	$	43	$	40	$	62,684
Total marketable securities	$	62,681	$	43	$	40	$	62,684

The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheets classification, is as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	57,345	$	57,379	$	47,767	$	47,732
Due after one through five years		13,136		13,223		14,914		14,952
Due after five through ten years		—		—		—		—
Due after ten years		—		—		—		—
Total marketable securities	$	70,481	$	70,602	$	62,681	$	62,684

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at March 31, 2019 and December 31, 2018:

	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2019
Municipal notes and bonds	$	10,400	$	1	$	4,676	$	4
Total	$	10,400	$	1	$	4,676	$	4
December 31, 2018
Municipal notes and bonds	$	27,952	$	30	$	4,671	$	10
Total	$	27,952	$	30	$	4,671	$	10

See Note 2 for additional discussion regarding the fair value of the Company’s marketable securities.

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

NOTE 4. Derivative Instruments and Hedging Activities

The Company, when it considers it to be appropriate, enters into forward contracts to hedge the economic exposures arising from foreign currency denominated transactions. At March 31, 2019 and December 31, 2018, these contracts included the future sale of Japanese Yen to purchase U.S. dollars.  Derivative instruments are measured at fair value and recognized as either, “Prepaid expenses and other current assets” or “Other current liabilities” in the Condensed Consolidated Balance Sheets with changes in the net derivatives position reflected in operating cash flows.  The foreign currency forward contracts were entered into by the Company’s Japanese subsidiary to economically hedge a portion of certain intercompany obligations.  The forward contracts are not designated as hedges for accounting purposes and increases in the fair value of $45 for the three months ended March 31, 2019 and a decrease in the fair value of $433 for the three months ended March 31, 2018, are recorded under the caption “Other expense (income), net” in the Condensed Consolidated Statements of Operations.

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019		December 31, 2018
Notional amount	$	5,806	$	6,746
Fair value of asset (liability)	$	13	$	(32	)

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Leasing Arrangements

3 Months Ended

Mar. 31, 2019

Lessee Disclosure [Abstract]

Leasing Arrangements

NOTE 5. Leasing Arrangements

The Company leases space for its corporate headquarters, manufacturing, sales and service operations, vehicles and information technology equipment under operating leases. All of the Company’s leases are operating leases.  The Company elected not to apply Accounting Standard Codification Topic 842 (“ASC 842”) to arrangements with lease terms of less than 12 months.  Operating lease right-of-use assets and obligations are reflected within the captions “Operating lease right-of-use assets,” “Current operating lease obligations,” and “Non-current operating lease obligations,” respectively, on the Condensed Consolidated Balance Sheets.

Operating lease costs were $877 during the three months ended March 31, 2019.  These costs are primarily related to long-term operating leases, but also include immaterial amounts for short-term leases less than 12 months.  Operating lease costs are recognized on a straight-line basis over the terms of the leases.

Additional operating lease right-of-use assets of $10 were recognized as non-cash asset additions that resulted from new operating lease liabilities during the three months ended March 31, 2019. Cash paid for amounts included in the present value of operating lease liabilities was $846 during the three months ended March 31, 2019 and is included in operating cash flows.

The Company often has the option to renew lease terms for buildings and other assets. The exercise of lease renewal options are generally at the Company’s sole discretion. In addition, certain lease arrangements may be terminated prior to their original expiration date at the Company’s discretion. The Company evaluates renewal and termination options at the lease commencement date to determine if it is reasonably certain to exercise the option on the basis of economic factors. The weighted average of the remaining lease term for operating leases as of March 31, 2019 was 8.1 years.

The discount rate implicit within the Company’s leases is generally not determinable and therefore the Company determines the discount rate based on its incremental borrowing rate. The incremental borrowing rate for our leases is determined based on the lease term in which lease payments are made. The weighted average discount rate used to measure operating lease liabilities as of March 31, 2019 was 4.7%.

The following table presents information about the amount and timing of cash flows arising from the Company’s operating leases as of March 31, 2019:

	March 31, 2019
Maturity of Lease Liabilities	Lease Payments
2019	$	2,361
2020		2,944
2021		2,019
2022		1,988
2023	$	1,698
Thereafter		7,484
Total undiscounted operating lease payments	$	18,494
Less: Imputed interest		3,294
Present value of operating lease liabilities	$	15,200

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Purchased Intangible Assets

3 Months Ended

Mar. 31, 2019

Purchased Intangible Assets [Abstract]

Purchased Intangible Assets

NOTE 6. Purchased Intangible Assets

Purchased intangible assets as of March 31, 2019 and December 31, 2018 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2019
Finite-lived intangibles:
Developed technology	$	66,177	$	59,987	$	6,190
Customer and distributor relationships		9,560		9,149		411
Trade names		4,361		3,901		460
Total identifiable intangible assets	$	80,098	$	73,037	$	7,061
December 31, 2018
Finite-lived intangibles:
Developed technology	$	66,177	$	59,692	$	6,485
Customer and distributor relationships		9,560		9,082		478
Trade names		4,361		3,876		485
Total identifiable intangible assets	$	80,098	$	72,650	$	7,448

Intangible asset amortization expenses for the three months ended March 31, 2019 and 2018 were $387 and $380, respectively.  Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expenses for the remainder of 2019 are $1,161, and for each of the next five years estimated amortization expenses are $1,346 for 2020, $598 for 2021, $532 for 2022, $515 for 2023, and $431 for 2024.

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Convertible Notes Receivable

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Convertible Notes Receivable

NOTE 7. Convertible Notes Receivable

The Company entered into a convertible loan agreement with Simax Precision Technologies Limited (“Simax”) on May 31, 2018.  Under the agreement, Simax may borrow from the Company up to $15,000 in multiple promissory notes, subject to limitations.  The Company expects to be a supplier of lithography modules to Simax which is focused on the manufacture, sale and service of lithography systems.  

The convertible notes will bear a rate of interest of 4.25% per annum payable on a semi-annual basis.  The convertible notes provide the Company with the option to convert the outstanding indebtedness into equity.   If the Company does not elect to exercise its option to convert the notes into equity, Simax will repay the principal amount outstanding and any outstanding interest in equal installments beginning on the fifth anniversary of the loan date and continuing on a quarterly basis over the next three years.

As of March 31, 2019, the convertible notes receivable balance was $5,000 with accrued interest of $93.

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Balance Sheet Details

3 Months Ended

Mar. 31, 2019

Balance Sheet Detail [Abstract]

Balance Sheet Details

NOTE 8. Balance Sheet Details

Inventories

Inventories are comprised of the following:

	March 31, 2019		December 31, 2018
Materials	$	70,431	$	61,025
Work-in-process		22,342		21,910
Finished goods		11,216		13,885
Total inventories	$	103,989	$	96,820

The Company has established reserves of $11,711 and $11,678 as of March 31, 2019 and December 31, 2018, respectively, for slow moving and obsolete inventory, which are included in the amounts above.

Property, Plant and Equipment

Property, plant and equipment, net is comprised of the following:

	March 31, 2019			December 31, 2018
Land and building	$	2,584		$	2,584
Machinery and equipment		28,886			29,097
Furniture and fixtures		3,232			3,226
Computer equipment and software		8,901			7,906
Leasehold improvements		9,449			9,448
		53,052			52,261
Accumulated depreciation		(34,453	)		(33,387	)
Total property, plant and equipment, net	$	18,599		$	18,874

Other assets

Other assets is comprised of the following:

	March 31, 2019		December 31, 2018
Convertible notes receivable	$	5,000	$	5,000
Deferred income taxes		12,785		12,810
Other		516		506
Total other assets	$	18,301	$	18,316

Other current liabilities

Other current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Contingent consideration - acquisitions	$	1,422	$	1,422
Customer deposits		888		1,135
Accrued inventory		1,082		1,103
Other		4,460		3,883
Total other current liabilities	$	7,852	$	7,543

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Unrecognized tax benefits (including interest)	$	5,462	$	5,409
Contingent consideration - acquisitions		638		638
Deferred revenue		1,196		1,314
Deferred rent		—		1,405
Other		2,218		2,395
Total other non-current liabilities	$	9,514	$	11,161

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies [Abstract]

Commitments and Contingencies

NOTE 9. Commitments and Contingencies

Intellectual Property Indemnification Obligations

The Company has entered into agreements with customers that include limited intellectual property indemnification obligations that are customary in the industry.  These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third-party intellectual property claims arising from these transactions.  The nature of the intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers.  Historically, the Company has not made any indemnification payments under such agreements and no amount has been accrued in the accompanying Condensed Consolidated Financial Statements with respect to these indemnification guarantees.

Warranty Reserves

The Company generally provides a warranty on its products for a period of 12 to 15 months against defects in material and workmanship.  The Company estimates the costs that may be incurred during the warranty period and records a liability in the amount of such costs at the time revenue is recognized.  The Company’s estimate is based primarily on historical experience.  The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.  Settlements of warranty reserves are generally associated with sales that occurred during the 12 to 15 months prior to the quarter-end and warranty accruals are related to sales during the same year.

Changes in the Company’s warranty reserves are as follows:

	Three Months Ended March 31,
	2019			2018
Balance, beginning of the period	$	2,441		$	2,427
Accruals		672			959
Usage		(853	)		(820	)
Balance, end of the period	$	2,260		$	2,566

Warranty reserves are reported in the Condensed Consolidated Balance Sheets under the caption “Accounts payable and accrued liabilities.”

Legal Matters

From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business.  As of March 31, 2019, there are no legal proceedings pending or threatened against the Company that management believes are likely to have a material adverse effect on the Company’s consolidated financial position or otherwise.

Line of Credit

The Company has a credit agreement with a bank that provides for a line of credit which is secured by the marketable securities the Company has with the bank.  The Company is permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed.  The available line of credit as of March 31, 2019 was approximately $96.7 million with an available interest rate of 4.0%.  The credit agreement is available to the Company until such time that either party terminates the arrangement at their discretion.  The Company has not utilized the line of credit to date.

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Revenue

3 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Revenue

NOTE 10. Revenue

Revenue is recognized when control of the promised goods or services are transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those goods or services.  The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

Contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers or the expected cost-plus margin.

Disaggregated Revenue

The following table presents the Company’s revenue disaggregated by revenue source:

	Three Months Ended
	March 31,
	2019		2018
Systems	$	42,772	$	56,102
Software licensing, support and maintenance		7,037		7,455
Parts		8,077		6,985
Services		3,006		2,554
Total revenue	$	60,892	$	73,096

The following table represents a disaggregation of revenue by timing of revenue:

	Three Months Ended
	March 31,
	2019		2018
Point-in-time	$	56,591	$	69,396
Over-time		4,301		3,700
Total revenue	$	60,892	$	73,096

See Note 16 of the Notes to the Condensed Consolidated Financial Statements for additional discussion of the Company’s disaggregated revenue in detail.

Systems Revenue

Revenue from systems is recognized when the Company transfers control of the product to the customer.  To indicate transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must have the significant risks and rewards of ownership.  The Company generally transfers control for system sales when the customer or the customer’s agent picks up the system at the Company’s facility.  Payment for the majority of the Company’s systems have 80-90% of the invoice amount due within 30 days and the remaining amount due upon completion of installation, recalibration and qualification by the customer.  The Company provides an assurance warranty on its systems for a period of twelve to fifteen months against defects in material and workmanship.  The Company provides for the estimated cost of product warranties at the time revenue is recognized.

Depending on the terms of the systems arrangement, the Company may also defer the recognition of a portion of the consideration expected to be received because the Company has to satisfy a future obligation (e.g., installation, training and extended warranties). The Company uses an observable price to determine the standalone selling price for separate performance obligations or a cost-plus margin approach when one is not available.

Software Licensing, Support and Maintenance Revenue

Revenue from software licenses provides the customer with a right to use the software as it exists when made available to the customer.  Revenue from software licenses are recognized upfront at the point in time when the software is made available to the customer.  Revenue from licensing support and maintenance is recognized as the support and maintenance are provided, which is over the contract period.  Payment for software licensing, support and maintenance is generally due in 30 days.  

Parts Revenue

Revenue from parts is recognized when the Company transfers control of the product, which typically occurs when the Company ships the product from its facilities to the customer.  Payment for parts is generally due in 30 days.  

Services Revenue

Revenue from services primarily consists of service contracts, which provide additional maintenance coverage beyond the Company’s assurance warranty on its products, service labor, consulting and training.  Revenue from service contracts is recognized ratably over the term of the service contract.  Revenue from service labor, consulting and training is recognized as services are performed.  Payment for services is generally due in 30 days.  

Contract Liabilities

The Company records contract liabilities when the customer has been billed in advance of the Company completing its performance obligations. These amounts are recorded as deferred revenue in the Consolidated Balance Sheets.  

Changes in deferred revenue were as follows:

	Three Months Ended
	March 31,
	2019			2018
Balance, beginning of the period	$	8,080		$	7,206
Deferral of revenue		1,805			4,553
Recognition of deferred revenue		(1,198	)		(2,986	)
Balance, ending of the period	$	8,687		$	8,773

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Share-Based Compensation

3 Months Ended

Mar. 31, 2019

Share Based Compensation [Abstract]

Share-Based Compensation

NOTE 11. Share-Based Compensation

Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the three months ended March 31, 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2018		794		$	19.51
Granted		288		$	23.50
Vested		(124	)	$	14.21
Forfeited		(5	)	$	20.28
Nonvested at March 31, 2019		953		$	21.40

Included in the number of shares granted in the table directly above are 55 market performance-based restricted stock units (“MPRSUs”) granted to executives in 2019.  Vesting of these MPRSUs is contingent upon the Company meeting certain total shareholder return (“TSR”) levels as compared to a select peer group over three years from the year granted.  The 2019 MPRSUs cliff vest at the end of the three-year period and have a maximum potential to vest at 200% (111 shares) based on TSR performance.  The related share-based compensation expense is determined based on the estimated fair value of the underlying shares on the date of grant and is recognized straight-line over the vesting term.  The estimated fair value per share of the MPRSUs was $26.72.

As of March 31, 2019 and December 31, 2018, there was $14,034 and $9,517 of total unrecognized compensation cost related to restricted stock units granted under the Company’s stock plans, respectively.  That cost is expected to be recognized over a weighted average period of 2.6 years and 2.1 years for each of the respective periods.

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Other Expense (Income), Net

3 Months Ended

Mar. 31, 2019

Other Income Expense [Abstract]

Other Expense (Income), Net

NOTE 12. Other Expense (Income), Net

Other expense (income), net is comprised of the following:

	Three Months Ended March 31,
	2019			2018
Foreign currency exchange losses (gains), net	$	(381	)	$	183
Rental income		—			(1	)
Total other expense (income), net	$	(381	)	$	182

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Income Taxes

3 Months Ended

Mar. 31, 2019

Income Taxes [Abstract]

Income Taxes

NOTE 13. Income Taxes

The following table provides details of income taxes:

	Three Months Ended March 31,
	2019			2018
Income before income taxes	$	8,795		$	17,674
Provision for income taxes	$	1,219		$	2,544
Effective tax rate		13.9	%		14.4	%

The income tax provision for the three months ended March 31, 2019 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year.  The changes in the Company’s effective tax rate for the three months ended March 31, 2019 as compared to the same period in 2018 are primarily due to changes in the mix of forecasted earnings by jurisdictions, Section 162 (m) adjustment and the tax-exempt interest.  The Company’s recorded effective tax rate is less than the U.S. statutory rate primarily due to a projected Foreign Derived Intangible Income Deduction from the Tax Act and federal research and development tax credits..

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt.  Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing the need for a valuation allowance.  As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets.  The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if appropriate.  The Company has a recorded valuation allowance against certain of its deferred tax assets of $3,172 as of March 31, 2019 and December 31, 2018.

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Earnings Per Share

3 Months Ended

Mar. 31, 2019

Earnings Loss Per Share [Abstract]

Earnings Per Share

NOTE 14. Earnings Per Share

Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period.  Diluted earnings per share is computed in the same manner and also gives effect to all dilutive common stock equivalent shares outstanding during the period.  Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive.  In accordance with U.S. GAAP, these shares were not included in calculating diluted earnings per share.

The following table sets forth the weighted average number of restricted stock units that have been excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive:

	Three Months Ended March 31,
	2019		2018
Restricted stock units		208		33
Total		208		33

The Company’s basic and diluted earnings per share amounts are as follows:

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	7,576	$	15,130
Denominator:
Basic earnings per share - weighted average shares    outstanding		30,916		31,662
Effect of potential dilutive securities:
Employee stock options and restricted stock    units - dilutive shares		350		655
Diluted earnings per share - weighted average shares    outstanding		31,266		32,317
Earnings per share:
Basic	$	0.25	$	0.48
Diluted	$	0.24	$	0.47

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Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2019

Accumulated Other Comprehensive Loss [Abstract]

Accumulated Other Comprehensive Loss

NOTE 15. Accumulated Other Comprehensive Loss

Comprehensive income includes net income, foreign currency translation adjustments and net unrealized gains and losses on available-for-sale debt securities.  See the Condensed Consolidated Statements of Comprehensive Income for the effect of the components of comprehensive income on the Company’s net income.

The components of accumulated other comprehensive loss, net of tax, are as follows:

	Foreign currency translation adjustments		Net unrealized (gains) losses on marketable securities			Accumulated other comprehensive loss (income)
Balance at December 31, 2018	$	1,273	$	(10	)	$	1,263
Net current period other comprehensive income		518		(95	)		423
Reclassifications		—		—			—
Balance at March 31, 2019	$	1,791	$	(105	)	$	1,686

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Segment Reporting and Geographic Information

3 Months Ended

Mar. 31, 2019

Segment Reporting And Geographic Information [Abstract]

Segment Reporting and Geographic Information

NOTE 16. Segment Reporting and Geographic Information

The Company is engaged in the design, development, manufacture and support of high-performance control metrology, defect inspection, advanced packaging lithography and data analysis systems used by microelectronics device manufacturers. The Company and its subsidiaries currently operate in a single operating segment: the design, development, manufacture and support of high-performance process control defect inspection and metrology, advanced packaging lithography and process control software systems used by microelectronics device manufacturers.  Therefore, the Company has one reportable segment.  The Company’s chief operating decision maker is the Chief Executive Officer (the “CEO”).  The CEO allocates resources and assesses performance of the business and other activities at the reportable segment level.

The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2019				2018
Systems and Software:
Process control	$	39,158	64	%	$	48,033	66	%
Lithography		3,614	6	%		8,069	11	%
Software licensing, support and maintenance		7,037	12	%		7,455	10	%
Parts		8,077	13	%		6,985	10	%
Services		3,006	5	%		2,554	3	%
Total revenue	$	60,892	100	%	$	73,096	100	%

The Company’s significant operations outside the United States include sales, service and application offices in Europe and Asia.  For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped.  Revenue by geographic region is as follows:

	Three Months Ended
	March 31,
	2019		2018
Revenue from third parties:
United States	$	9,131	$	9,068
Taiwan		11,031		14,467
Japan		3,940		4,130
China		16,044		17,971
South Korea		10,771		17,230
Singapore		2,016		4,282
Other Asia		993		1,917
Germany		1,850		1,324
Other Europe		5,116		2,707
Total revenue	$	60,892	$	73,096

The following customers accounted for more than 10% of total revenue for the indicated periods:

	Three Months Ended March 31,
	2019			2018
Customer A		27.2	%		14.2	%
Customer B		—	%		11.2	%

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Share Repurchase Authorization

3 Months Ended

Mar. 31, 2019

Share Repurchase Program [Abstract]

Share Repurchase Authorization

NOTE 17. Shares Repurchase Authorization

In October 2018, the Board of Directors approved a new share repurchase authorization, which allows the Company to repurchase up to $40,000 worth of shares of its common stock.  The authorization provides for repurchases to be made in the open market or through negotiated transactions from time to time.  The share repurchase authorization has no expiration date and may be discontinued at any time.  During the three months ended March 31, 2019, the Company repurchased 37 shares of common stock under the share repurchase authorization and those shares were subsequently retired.  At March 31, 2019, there was $32,494 available for future share repurchases.

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Fair Value Measurements - (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2019 and December 31, 2018:

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2019
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	70,602	$	—	$	70,602	$	—
Foreign currency forward contracts		13		—		13		—
Total assets	$	70,615	$	—	$	70,615	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Total liabilities	$	2,060	$	—	$	—	$	2,060
December 31, 2018
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	62,684	$	—	$	62,684	$	—
Total assets	$	62,684	$	—	$	62,684	$	—
Liabilities:
Contingent consideration - acquisitions	$	2,060	$	—	$	—	$	2,060
Foreign currency forward contracts		32		—		32		—
Total liabilities	$	2,092	$	—	$	32	$	2,060

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

This table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2019:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2018	$	2,060
Additions		—
Payments		—
Transfer into (out of) Level 3		—
Balance at March 31, 2019	$	2,060

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Marketable Securities - (Tables)

3 Months Ended

Mar. 31, 2019

Marketable Securities [Abstract]

Schedule of Marketable Securities by Category

At March 31, 2019 and December 31, 2018, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2019
Municipal notes and bonds	$	70,481	$	126	$	5	$	70,602
Total marketable securities	$	70,481	$	126	$	5	$	70,602
December 31, 2018
Municipal notes and bonds	$	62,681	$	43	$	40	$	62,684
Total marketable securities	$	62,681	$	43	$	40	$	62,684

Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date

The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheets classification, is as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	57,345	$	57,379	$	47,767	$	47,732
Due after one through five years		13,136		13,223		14,914		14,952
Due after five through ten years		—		—		—		—
Due after ten years		—		—		—		—
Total marketable securities	$	70,481	$	70,602	$	62,681	$	62,684

Summary of Estimated Fair Value and Gross Unrealized Holding Losses of Marketable Securities in Unrealized Loss Position

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at March 31, 2019 and December 31, 2018:

	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2019
Municipal notes and bonds	$	10,400	$	1	$	4,676	$	4
Total	$	10,400	$	1	$	4,676	$	4
December 31, 2018
Municipal notes and bonds	$	27,952	$	30	$	4,671	$	10
Total	$	27,952	$	30	$	4,671	$	10

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Forward Contracts and Related Fair Values

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019		December 31, 2018
Notional amount	$	5,806	$	6,746
Fair value of asset (liability)	$	13	$	(32	)

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Leasing Arrangements (Tables)

3 Months Ended

Mar. 31, 2019

Lessee Disclosure [Abstract]

Summary of Maturity of Lease Liabilities

The following table presents information about the amount and timing of cash flows arising from the Company’s operating leases as of March 31, 2019:

	March 31, 2019
Maturity of Lease Liabilities	Lease Payments
2019	$	2,361
2020		2,944
2021		2,019
2022		1,988
2023	$	1,698
Thereafter		7,484
Total undiscounted operating lease payments	$	18,494
Less: Imputed interest		3,294
Present value of operating lease liabilities	$	15,200

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Purchased Intangible Assets - (Tables)

3 Months Ended

Mar. 31, 2019

Purchased Intangible Assets [Abstract]

Schedule of Purchased Intangible Assets

Purchased intangible assets as of March 31, 2019 and December 31, 2018 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2019
Finite-lived intangibles:
Developed technology	$	66,177	$	59,987	$	6,190
Customer and distributor relationships		9,560		9,149		411
Trade names		4,361		3,901		460
Total identifiable intangible assets	$	80,098	$	73,037	$	7,061
December 31, 2018
Finite-lived intangibles:
Developed technology	$	66,177	$	59,692	$	6,485
Customer and distributor relationships		9,560		9,082		478
Trade names		4,361		3,876		485
Total identifiable intangible assets	$	80,098	$	72,650	$	7,448

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Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2019

Balance Sheet Detail [Abstract]

Schedule of Inventories

Inventories are comprised of the following:

	March 31, 2019		December 31, 2018
Materials	$	70,431	$	61,025
Work-in-process		22,342		21,910
Finished goods		11,216		13,885
Total inventories	$	103,989	$	96,820

Schedule of Property, Plant and Equipment, Net

Property, plant and equipment, net is comprised of the following:

	March 31, 2019			December 31, 2018
Land and building	$	2,584		$	2,584
Machinery and equipment		28,886			29,097
Furniture and fixtures		3,232			3,226
Computer equipment and software		8,901			7,906
Leasehold improvements		9,449			9,448
		53,052			52,261
Accumulated depreciation		(34,453	)		(33,387	)
Total property, plant and equipment, net	$	18,599		$	18,874

Schedule of Other Assets

Other assets is comprised of the following:

	March 31, 2019		December 31, 2018
Convertible notes receivable	$	5,000	$	5,000
Deferred income taxes		12,785		12,810
Other		516		506
Total other assets	$	18,301	$	18,316

Schedule of Other Current Liabilities

Other current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Contingent consideration - acquisitions	$	1,422	$	1,422
Customer deposits		888		1,135
Accrued inventory		1,082		1,103
Other		4,460		3,883
Total other current liabilities	$	7,852	$	7,543

Schedule of Other Non-Current Liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2019		December 31, 2018
Unrecognized tax benefits (including interest)	$	5,462	$	5,409
Contingent consideration - acquisitions		638		638
Deferred revenue		1,196		1,314
Deferred rent		—		1,405
Other		2,218		2,395
Total other non-current liabilities	$	9,514	$	11,161

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies [Abstract]

Schedule of Changes in Warranty Reserves

Changes in the Company’s warranty reserves are as follows:

	Three Months Ended March 31,
	2019			2018
Balance, beginning of the period	$	2,441		$	2,427
Accruals		672			959
Usage		(853	)		(820	)
Balance, end of the period	$	2,260		$	2,566

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Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table presents the Company’s revenue disaggregated by revenue source:

	Three Months Ended
	March 31,
	2019		2018
Systems	$	42,772	$	56,102
Software licensing, support and maintenance		7,037		7,455
Parts		8,077		6,985
Services		3,006		2,554
Total revenue	$	60,892	$	73,096

The following table represents a disaggregation of revenue by timing of revenue:

	Three Months Ended
	March 31,
	2019		2018
Point-in-time	$	56,591	$	69,396
Over-time		4,301		3,700
Total revenue	$	60,892	$	73,096

Schedule of Changes in Deferred Revenue

Changes in deferred revenue were as follows:

	Three Months Ended
	March 31,
	2019			2018
Balance, beginning of the period	$	8,080		$	7,206
Deferral of revenue		1,805			4,553
Recognition of deferred revenue		(1,198	)		(2,986	)
Balance, ending of the period	$	8,687		$	8,773

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Share-Based Compensation - (Tables)

3 Months Ended

Mar. 31, 2019

Share Based Compensation [Abstract]

Summary of Nonvested Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the three months ended March 31, 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2018		794		$	19.51
Granted		288		$	23.50
Vested		(124	)	$	14.21
Forfeited		(5	)	$	20.28
Nonvested at March 31, 2019		953		$	21.40

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Other Expense (Income), Net (Tables)

3 Months Ended

Mar. 31, 2019

Other Income Expense [Abstract]

Schedule of Other Expense (Income), Net

Other expense (income), net is comprised of the following:

	Three Months Ended March 31,
	2019			2018
Foreign currency exchange losses (gains), net	$	(381	)	$	183
Rental income		—			(1	)
Total other expense (income), net	$	(381	)	$	182

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Income Taxes - (Tables)

3 Months Ended

Mar. 31, 2019

Income Taxes [Abstract]

Schedule of Effective Tax Rate

The following table provides details of income taxes:

	Three Months Ended March 31,
	2019			2018
Income before income taxes	$	8,795		$	17,674
Provision for income taxes	$	1,219		$	2,544
Effective tax rate		13.9	%		14.4	%

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Earnings Per Share - (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share

The following table sets forth the weighted average number of restricted stock units that have been excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive:

	Three Months Ended March 31,
	2019		2018
Restricted stock units		208		33
Total		208		33

Schedule of Earnings Per Share, Basic and Diluted

The Company’s basic and diluted earnings per share amounts are as follows:

	Three Months Ended March 31,
	2019		2018
Numerator:
Net income	$	7,576	$	15,130
Denominator:
Basic earnings per share - weighted average shares    outstanding		30,916		31,662
Effect of potential dilutive securities:
Employee stock options and restricted stock    units - dilutive shares		350		655
Diluted earnings per share - weighted average shares    outstanding		31,266		32,317
Earnings per share:
Basic	$	0.25	$	0.48
Diluted	$	0.24	$	0.47

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Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2019

Accumulated Other Comprehensive Loss [Abstract]

Components of Accumulated Other Comprehensive Loss, Net of Tax

The components of accumulated other comprehensive loss, net of tax, are as follows:

	Foreign currency translation adjustments		Net unrealized (gains) losses on marketable securities			Accumulated other comprehensive loss (income)
Balance at December 31, 2018	$	1,273	$	(10	)	$	1,263
Net current period other comprehensive income		518		(95	)		423
Reclassifications		—		—			—
Balance at March 31, 2019	$	1,791	$	(105	)	$	1,686

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Segment Reporting and Geographic Information - (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting And Geographic Information [Abstract]

Schedule of Revenue from External Customers by Products and Services

The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2019				2018
Systems and Software:
Process control	$	39,158	64	%	$	48,033	66	%
Lithography		3,614	6	%		8,069	11	%
Software licensing, support and maintenance		7,037	12	%		7,455	10	%
Parts		8,077	13	%		6,985	10	%
Services		3,006	5	%		2,554	3	%
Total revenue	$	60,892	100	%	$	73,096	100	%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped.  Revenue by geographic region is as follows:

	Three Months Ended
	March 31,
	2019		2018
Revenue from third parties:
United States	$	9,131	$	9,068
Taiwan		11,031		14,467
Japan		3,940		4,130
China		16,044		17,971
South Korea		10,771		17,230
Singapore		2,016		4,282
Other Asia		993		1,917
Germany		1,850		1,324
Other Europe		5,116		2,707
Total revenue	$	60,892	$	73,096

Schedule of Revenue by Major Customers by Reporting Segments

The following customers accounted for more than 10% of total revenue for the indicated periods:

	Three Months Ended March 31,
	2019			2018
Customer A		27.2	%		14.2	%
Customer B		—	%		11.2	%

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Basis of Presentation - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Organization And Nature Of Operations [Abstract]
Additional operating lease asset	$ 13,734	$ 14,400
Additional operating lease obligations	$ 846	$ 14,400

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Fair Value Measurements - Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Municipal notes and bonds	$ 70,602	$ 62,684
Foreign currency forward contracts	13
Total assets	70,615	62,684
Contingent consideration - acquisitions	2,060	2,060
Foreign currency forward contracts		32
Total liabilities	2,060	2,092
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Municipal notes and bonds	0	0
Foreign currency forward contracts	0
Total assets	0	0
Contingent consideration - acquisitions	0	0
Foreign currency forward contracts		0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Municipal notes and bonds	70,602	62,684
Foreign currency forward contracts	13
Total assets	70,615	62,684
Contingent consideration - acquisitions	0	0
Foreign currency forward contracts		32
Total liabilities	0	32
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Municipal notes and bonds	0	0
Foreign currency forward contracts	0
Total assets	0	0
Contingent consideration - acquisitions	2,060	2,060
Foreign currency forward contracts		0
Total liabilities	$ 2,060	$ 2,060

XML

Fair Value Measurements - Additional Information (Details)	Mar. 31, 2019	Mar. 31, 2018
Significant Unobservable Inputs (Level 3) [Member] | Measurement Input Discount Rate [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated discount rates	0.092	0.094

XML

Fair Value Measurements - Reconciliation for All Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (level 3) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Fair Value Disclosures [Abstract]
Balance at December 31, 2018	$ 2,060
Additions	0
Payments	0
Transfer into (out of) Level 3	0
Balance at March 31, 2019	$ 2,060

XML

Marketable Securities - Schedule of Marketable Securities by Category (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 70,481	$ 62,681
Gross Unrealized Holding Gains	126	43
Gross Unrealized Holding Losses	5	40
Fair Value	70,602	62,684
Municipal Notes and Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	70,481	62,681
Gross Unrealized Holding Gains	126	43
Gross Unrealized Holding Losses	5	40
Fair Value	$ 70,602	$ 62,684

XML

Marketable Securities - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Available For Sale Securities Debt Maturities Fair Value [Abstract]
Amortized Cost, Due within one year	$ 57,345	$ 47,767
Amortized Cost, Due after one through five years	13,136	14,914
Amortized Cost, Due after five through ten years	0	0
Amortized Cost, Due after ten years	0	0
Amortized Cost, Total marketable securities	70,481	62,681
Fair Value, Due within one year	57,379	47,732
Fair Value, Due after one through five years	13,223	14,952
Fair Value, Due after five through ten years	0	0
Fair Value, Due after ten years	0	0
Fair Value, Total marketable securities	$ 70,602	$ 62,684

XML

Marketable Securities - Summary of Estimated Fair Value and Gross Unrealized Holding Losses of Marketable Securities in Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	$ 10,400	$ 27,952
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	1	30
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	4,676	4,671
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	4	10
Municipal Notes and Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	10,400	27,952
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	1	30
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	4,676	4,671
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	$ 4	$ 10

XML

Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Increase (decrease) in fair value of forward contracts	$ 45	$ (433)

XML

Derivative Instruments and Hedging Activities - Forward Contracts and Related Fair Values (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional amount	$ 5,806	$ 6,746
Fair value of asset (liability)	$ 13	$ (32)

XML

Leasing Arrangements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Lessee Disclosure [Abstract]
Operating lease cost	$ 877
Additional operating lease,right-of-use assets resulted from new operating lease liabilities	10
Operating lease liability	$ 846	$ 14,400
Weighted average remaining lease term of operating leases	8 years 1 month 6 days
Weighted average discount rate of operating lease liabilities	4.70%

XML

Leasing Arrangements - Summary of Maturity of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Lessee Disclosure [Abstract]
2019	$ 2,361
2020	2,944
2021	2,019
2022	1,988
2023	1,698
Thereafter	7,484
Total undiscounted operating lease payments	18,494
Less: Imputed interest	3,294
Present value of operating lease liabilities	$ 15,200

XML

Purchase Intangible Assets - (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles, Gross Carrying Amount	$ 80,098	$ 80,098
Finite-lived intangibles, Accumulated Amortization	73,037	72,650
Finite-lived intangibles, Net	7,061	7,448
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles, Gross Carrying Amount	66,177	66,177
Finite-lived intangibles, Accumulated Amortization	59,987	59,692
Finite-lived intangibles, Net	6,190	6,485
Customer and Distributor Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles, Gross Carrying Amount	9,560	9,560
Finite-lived intangibles, Accumulated Amortization	9,149	9,082
Finite-lived intangibles, Net	411	478
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles, Gross Carrying Amount	4,361	4,361
Finite-lived intangibles, Accumulated Amortization	3,901	3,876
Finite-lived intangibles, Net	$ 460	$ 485

XML

Purchase Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Purchased Intangible Assets [Abstract]
Amortization	$ 387	$ 380
Future amortization expense, Remainder of 2019	1,161
Future amortization expense, 2020	1,346
Future amortization expense, 2021	598
Future amortization expense, 2022	532
Future amortization expense, 2023	515
Future amortization expense, 2024	$ 431

XML

Convertible Notes Receivable - Additional Information (Details) - USD ($)	May 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Loans And Leases Receivable Disclosure [Line Items]
Convertible notes receivable		$ 5,000,000	$ 5,000,000
Accrued interest		$ 93,000
Convertible Loan Agreement [Member] | Simax Precision Technologies Limited [Member]
Loans And Leases Receivable Disclosure [Line Items]
Funds available in multiple promissory notes	$ 15,000,000
Convertible notes rate of interest	4.25%
Term of repayment for principal amount and outstanding interest	3 years

XML

Balance Sheet Details - Schedule of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory Details [Abstract]
Materials	$ 70,431	$ 61,025
Work-in-process	22,342	21,910
Finished goods	11,216	13,885
Total inventories	$ 103,989	$ 96,820

XML

Balance Sheet Details - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Detail [Abstract]
Inventory valuation reserves	$ 11,711	$ 11,678

XML

Balance Sheet Details - Schedule of Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 53,052	$ 52,261
Accumulated depreciation	(34,453)	(33,387)
Total property, plant and equipment, net	18,599	18,874
Land and Building [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,584	2,584
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	28,886	29,097
Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	3,232	3,226
Computer Equipment and Software [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	8,901	7,906
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 9,449	$ 9,448

XML

Balance Sheet Details - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Convertible notes receivable	$ 5,000	$ 5,000
Deferred income taxes	12,785	12,810
Other	516	506
Total other assets	$ 18,301	$ 18,316

XML

Balance Sheet Details - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Current [Abstract]
Contingent consideration - acquisitions	$ 1,422	$ 1,422
Customer deposits	888	1,135
Accrued inventory	1,082	1,103
Other	4,460	3,883
Total other current liabilities	$ 7,852	$ 7,543

XML

Balance Sheet Details - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Noncurrent [Abstract]
Unrecognized tax benefits (including interest)	$ 5,462	$ 5,409
Contingent consideration - acquisitions	638	638
Deferred revenue	1,196	1,314
Deferred rent		1,405
Other	2,218	2,395
Total other non-current liabilities	$ 9,514	$ 11,161

XML

Commitments and Contingencies - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Commitments And Contingencies [Line Items]
Percentage of maximum borrowing capacity of value of eligible securities	70.00%
Available line of credit	$ 96.7
Available interest rate on line of credit	4.00%
Minimum [Member]
Commitments And Contingencies [Line Items]
Warranty period	12 months
Maximum [Member]
Commitments And Contingencies [Line Items]
Warranty period	15 months

XML

Commitments and Contingencies - Schedule of Changes in Warranty Reserves (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commitments And Contingencies [Abstract]
Balance, beginning of the period	$ 2,441	$ 2,427
Accruals	672	959
Usage	(853)	(820)
Balance, end of the period	$ 2,260	$ 2,566

XML

Revenue - Schedule of Disaggregation of Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 60,892	$ 73,096
Systems Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	42,772	56,102
Software Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,037	7,455
Parts Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	8,077	6,985
Service Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 3,006	$ 2,554

XML

Revenue - Schedule of Disaggregation of Revenue by Timing of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 60,892	$ 73,096
Transferred at Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	56,591	69,396
Transferred over Time [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 4,301	$ 3,700

XML

Revenue - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019
Systems Revenue [Member]
Disaggregation Of Revenue [Line Items]
Number of days for payment due from customer	30 days
Software Revenue [Member]
Disaggregation Of Revenue [Line Items]
Number of days for payment due from customer	30 days
Parts Revenue [Member]
Disaggregation Of Revenue [Line Items]
Number of days for payment due from customer	30 days
Service Revenue [Member]
Disaggregation Of Revenue [Line Items]
Number of days for payment due from customer	30 days
Minimum [Member] | Systems Revenue [Member]
Disaggregation Of Revenue [Line Items]
Percentage of invoice amount due	80.00%
Assurance warranty period against defects	12 months
Maximum [Member] | Systems Revenue [Member]
Disaggregation Of Revenue [Line Items]
Percentage of invoice amount due	90.00%
Assurance warranty period against defects	15 months

XML

Revenue - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Deferred Revenue Disclosure [Abstract]
Balance, beginning of the period	$ 8,080	$ 7,206
Deferral of revenue	1,805	4,553
Recognition of deferred revenue	(1,198)	(2,986)
Balance, ending of the period	$ 8,687	$ 8,773

XML

Share-Based Compensation - Summary of Unvested Restricted Stock Unit Activity (Details)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Restricted Stock Units Activity [Abstract]
Number of Shares, Nonvested beginning balance | shares	794,000
Number of Shares, Granted | shares	288,000
Number of Shares, Vested | shares	(124,000)
Number of Shares, Forfeited | shares	(5,000)
Number of Shares, Nonvested ending balance | shares	953,000
Weighted Average Grant Date Fair Value, Nonvested beginning balance | $ / shares	$ 19.51
Weighted Average Grant Date Fair Value, Granted | $ / shares	23.50
Weighted Average Grant Date Fair Value, Vested | $ / shares	14.21
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	20.28
Weighted Average Grant Date Fair Value, Nonvested ending balance | $ / shares	$ 21.40

XML

Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Market performance-based restricted stock units granted	288,000
Maximum potential market performance-based restricted stock units to vest	111
Estimated fair value per share of the market performance-based restricted stock units	$ 26.72
Market Performance Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Market performance-based restricted stock units granted	55
Maximum potential market performance-based restricted stock units to vest percentage	200.00%
Options vesting period	3 years
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost related to restricted stock units granted	$ 14,034	$ 9,517
Unrecognized compensation cost related to restricted stock units, weighted average period	2 years 7 months 6 days	2 years 1 month 6 days

XML

Other Expense (Income), Net - Schedule of Other Expense (Income), Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income Expense [Abstract]
Foreign currency exchange losses (gains), net	$ (381)	$ 183
Rental income	0	(1)
Total other expense (income), net	$ (381)	$ 182

XML

Income Taxes - Schedule of Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Abstract]
Income before income taxes	$ 8,795	$ 17,674
Provision for income taxes	$ 1,219	$ 2,544
Effective tax rate	13.90%	14.40%

XML

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Deferred tax assets, valuation allowance	$ 3,172	$ 3,172

XML

Earnings Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share	208	33
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share	208	33

XML

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 7,576	$ 15,130
Basic earnings per share - weighted average shares outstanding	30,916	31,662
Employee stock options and restricted stock units - dilutive shares	350	655
Diluted earnings per share - weighted average shares outstanding	31,266	32,317
Basic	$ 0.25	$ 0.48
Diluted	$ 0.24	$ 0.47

XML

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2018	$ (361,888)
Balance at March 31, 2019	(369,862)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2018	1,273
Net current period other comprehensive income	518
Reclassifications	0
Balance at March 31, 2019	1,791
Net Unrealized (Gains) Losses on Marketable Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2018	(10)
Net current period other comprehensive income	(95)
Reclassifications	0
Balance at March 31, 2019	(105)
Accumulated Other Comprehensive Loss (Income) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at December 31, 2018	1,263
Net current period other comprehensive income	423
Reclassifications	0
Balance at March 31, 2019	$ 1,686

XML

Segment Reporting and Geographic Information - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019 Segment
Segment Reporting [Abstract]
Number of reportable segments	1

XML

Segment Reporting and Geographic Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 60,892	$ 73,096
Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%
Process Control [Member]
Segment Reporting Information [Line Items]
Revenues	$ 39,158	$ 48,033
Process Control [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	64.00%	66.00%
Lithography [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,614	$ 8,069
Lithography [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	6.00%	11.00%
Software Revenue [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,037	$ 7,455
Software Revenue [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.00%	10.00%
Parts Revenue [Member]
Segment Reporting Information [Line Items]
Revenues	$ 8,077	$ 6,985
Parts Revenue [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	13.00%	10.00%
Service Revenue [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,006	$ 2,554
Service Revenue [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	5.00%	3.00%

XML

Segment Reporting and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 60,892	$ 73,096
United States [Member]
Segment Reporting Information [Line Items]
Revenues	9,131	9,068
Taiwan [Member]
Segment Reporting Information [Line Items]
Revenues	11,031	14,467
Japan [Member]
Segment Reporting Information [Line Items]
Revenues	3,940	4,130
China [Member]
Segment Reporting Information [Line Items]
Revenues	16,044	17,971
South Korea [Member]
Segment Reporting Information [Line Items]
Revenues	10,771	17,230
Singapore [Member]
Segment Reporting Information [Line Items]
Revenues	2,016	4,282
Other Asia [Member]
Segment Reporting Information [Line Items]
Revenues	993	1,917
Germany [Member]
Segment Reporting Information [Line Items]
Revenues	1,850	1,324
Other Europe [Member]
Segment Reporting Information [Line Items]
Revenues	$ 5,116	$ 2,707

XML

Segment Reporting and Geographic Information - Schedule of Revenue by Major Customers by Reporting Segments (Details) - Sales [Member] - Customer [Member]	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Customer A [Member]
Segment Reporting Information [Line Items]
Entity-wide revenue, major customer, percentage	27.20%	14.20%
Customer B [Member]
Segment Reporting Information [Line Items]
Entity-wide revenue, major customer, percentage		11.20%

XML

Share Repurchase Authorization - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Oct. 31, 2018
Shares Repurchase Authorization [Line Items]
Amount available for future repurchase	$ 32,494,000
Common Stock [Member]
Shares Repurchase Authorization [Line Items]
Shares of common stock repurchased	37,000
Maximum [Member]
Shares Repurchase Authorization [Line Items]
Stock repurchase, authorized amount		$ 40,000,000