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 27, 2021

Or 

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

For the transition period from            to            

Commission file number: 000-50307

FormFactor, Inc.

(Exact name of registrant as specified in its charter)

Delaware	13-3711155
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

7005 Southfront Road, Livermore, California 94551

(Address of principal executive offices, including zip code)

(925) 290-4000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, $0.001 par value	FORM	Nasdaq Global Market

 ______________________________________

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 submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of the Regulation S-T (§232.405 of this chapter) 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. (Check one):

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 ☒ 

As of April 30, 2021, 77,622,717 shares of the registrant’s common stock, par value $0.001 per share, were outstanding.

FORMFACTOR, INC.

FORM 10-Q FOR THE QUARTERLY PERIOD ENDED MARCH 27, 2021

INDEX

Part I.	Financial Information
Item 1.	Financial Statements (Unaudited):
	Condensed Consolidated Balance Sheets as of March 27, 2021 and December 26, 2020	3
	Condensed Consolidated Statements of Income for the three months ended March 27, 2021 and March 28, 2020	4
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March 27, 2021 and March 28, 2020	5
	Condensed Consolidated Statement of Stockholders' Equity for the three months ended March 27, 2021 and March 28, 2020	6
	Condensed Consolidated Statements of Cash Flows for the three months ended March 27, 2021 and March 28, 2020	7
	Notes to Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	32
Item 4.	Controls and Procedures	33
Part II.	Other Information	33
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and use of proceeds	34
Item 6.	Exhibits	35
Signatures		36

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PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

FORMFACTOR, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

(Unaudited)

	March 27, 2021		December 26, 2020
ASSETS
Current assets:
Cash and cash equivalents	$	173,616	$	187,225
Marketable securities	94,093		67,810
Accounts receivable, net of allowance for doubtful accounts of $232 and $248	103,500		107,603
Inventories, net	104,727		99,229
Restricted cash	2,798		1,904
Prepaid expenses and other current assets	19,371		23,303
Total current assets	498,105		487,074
Restricted cash	1,894		1,969
Operating lease, right-of-use-assets	37,208		30,756
Property, plant and equipment, net of accumulated depreciation	112,312		104,103
Goodwill	214,218		212,761
Intangibles, net	48,786		59,147
Deferred tax assets	65,821		66,242
Other assets	1,867		1,165
Total assets	$	980,211	$	963,217
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	67,720	$	62,045
Accrued liabilities	43,468		55,342
Current portion of term loans, net of unamortized issuance costs	9,260		9,516
Deferred revenue	18,644		20,964
Operating lease liabilities	7,557		6,704
Total current liabilities	146,649		154,571
Term loans, less current portion, net of unamortized issuance costs	22,390		24,978
Deferred tax liabilities	4,965		5,346
Long-term operating lease liabilities	33,485		27,996
Other liabilities	6,189		6,242
Total liabilities	213,678		219,133
Stockholders’ equity:
Common stock, $0.001 par value:
250,000,000 shares authorized; 77,758,530 and 77,437,997 shares issued and outstanding	78		78
Treasury stock, at cost, 136,402 and — shares	(5,738)		—
Additional paid-in capital	915,136		903,838
Accumulated other comprehensive income	3,150		5,886
Accumulated deficit	(146,093)		(165,718)
Total stockholders’ equity	766,533		744,084
Total liabilities and stockholders’ equity	$	980,211	$	963,217

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

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FORMFACTOR, INC.

 CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share amounts)

(Unaudited)

	Three Months Ended
	March 27, 2021		March 28, 2020
Revenues	$	186,636	$	160,753
Cost of revenues	109,930		93,363
Gross profit	76,706		67,390
Operating expenses:
Research and development	24,046		21,267
Selling, general and administrative	30,015		27,693
Total operating expenses	54,061		48,960
Operating income	22,645		18,430
Interest income	194		685
Interest expense	(180)		(318)
Other income (expense), net	172		(91)
Income before income taxes	22,831		18,706
Provision for income taxes	3,206		2,816
Net income	$	19,625	$	15,890
Net income per share:
Basic	$	0.25	$	0.21
Diluted	$	0.25	$	0.20
Weighted-average number of shares used in per share calculations:
Basic	77,598		76,005
Diluted	79,988		78,510

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

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FORMFACTOR, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended
	March 27, 2021		March 28, 2020
Net income	$	19,625	$	15,890
Other comprehensive loss, net of tax:
Translation adjustments and other	(2,379)		(399)
Unrealized losses on available-for-sale marketable securities	(131)		(27)
Unrealized gains (losses) on derivative instruments	(226)		176
Other comprehensive loss, net of tax	(2,736)		(250)
Comprehensive income	$	16,889	$	15,640

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

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FORMFACTOR, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(In thousands, except shares)

(Unaudited)

	Shares of Common Stock	Common Stock		Shares of Treasury Stock	Treasury Stock		Additional Paid-in Capital		Accumulated Other Comprehensive  Income (Loss)		Accumulated Deficit		Total
	Three Months Ended March 27, 2021
Balances, December 26, 2020	77,437,997	$	78	—	$	—	$	903,838	$	5,886	$	(165,718)	$	744,084
Issuance of common stock under the Employee Stock Purchase Plan	228,784	—		—	—		5,065		—		—		5,065
Issuance of common stock pursuant to exercise of options	50,000	—		—	—		422		—		—		422
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld for tax	41,749	—		—	—		(1,141)		—		—		(1,141)
Purchase of common stock through repurchase program	—	—		(136,402)	(5,738)		—		—		—		(5,738)
Stock-based compensation	—	—		—	—		6,952		—		—		6,952
Other comprehensive loss	—	—		—	—		—		(2,736)		—		(2,736)
Net income	—	—		—	—		—		—		19,625		19,625
Balances, March 27, 2021	77,758,530	$	78	(136,402)	$	(5,738)	$	915,136	$	3,150	$	(146,093)	$	766,533

	Shares of Common Stock	Common Stock		Shares of Treasury Stock	Treasury Stock		Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Accumulated Deficit		Total
	Three Months Ended March 28, 2020
Balances, December 28, 2019	75,764,990	$	76	—	$	—	$	885,821	$	(659)	$	(244,241)	$	640,997
Issuance of common stock under the Employee Stock Purchase Plan	311,591	—		—	—		4,066		—		—		4,066
Issuance of common stock pursuant to exercise of options	55,769	1		—	—		446		—		—		447
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld for tax	25,901	—		—	—		(385)		—		—		(385)
Stock-based compensation	—	—		—	—		5,652		—		—		5,652
Other comprehensive loss	—	—		—	—		—		(250)		—		(250)
Net income	—	—		—	—		—		—		15,890		15,890
Balances, March 28, 2020	76,158,251	$	77	—	—		$	895,600	$	(909)	$	(228,351)	$	666,417

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

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FORMFACTOR, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended
	March 27, 2021		March 28, 2020
Cash flows from operating activities:
Net income	$	19,625	$	15,890
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,130		4,561
Amortization	6,805		7,263
Reduction in the carrying amount of right-of-use assets	1,811		1,511
Stock-based compensation expense	7,077		5,623
Provision for excess and obsolete inventories	3,394		3,287
Other adjustments to reconcile net income to net cash provided by operating activities	2,140		407
Changes in assets and liabilities:
Accounts receivable	3,576		7,803
Inventories	(9,911)		928
Prepaid expenses and other current assets	3,011		(240)
Other assets	(50)		194
Accounts payable	5,722		763
Accrued liabilities	(12,732)		(6,970)
Other liabilities	114		33
Deferred revenues	(2,411)		(123)
Operating lease liabilities	(1,945)		(1,591)
Net cash provided by operating activities	32,356		39,339
Cash flows from investing activities:
Acquisition of property, plant and equipment	(13,470)		(12,050)
Proceeds from sale of a subsidiary	—		40
Purchases of marketable securities	(41,062)		(16,441)
Proceeds from maturities and sales of marketable securities	14,610		23,009
Net cash used in investing activities	(39,922)		(5,442)
Cash flows from financing activities:
Proceeds from issuances of common stock	5,487		4,513
Purchase of common stock through stock repurchase program	(5,738)		—
Tax withholdings related to net share settlements of equity awards	(1,141)		(385)
Principal repayments on term loans	(2,376)		(13,199)
Net cash used in financing activities	(3,768)		(9,071)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,456)		312
Net increase (decrease) in cash, cash equivalents and restricted cash	(12,790)		25,138
Cash, cash equivalents and restricted cash, beginning of period	191,098		147,937
Cash, cash equivalents and restricted cash, end of period	$	178,308	$	173,075

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

7

FORMFACTOR, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended
	March 27, 2021		March 28, 2020
Non-cash investing and financing activities:
Change in accounts payable and accrued liabilities related to property, plant and equipment purchases	$	1,087	$	(2,116)
Operating lease, right-of-use assets obtained in exchange for lease obligations	8,572		6,307
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net	$	1,034	$	2,419
Cash paid for interest	173		291
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	$	173,616	$	169,607
Restricted cash, current	2,798		2,107
Restricted cash	1,894		1,361
Total cash, cash equivalents and restricted cash	$	178,308	$	173,075

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

8

FORMFACTOR, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 — Basis of Presentation and New Accounting Pronouncements

Basis of Presentation

The accompanying condensed consolidated financial information of FormFactor, Inc. is unaudited and has been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). However, such information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods. The condensed consolidated financial statements included herein should be read in conjunction with the consolidated financial statements and the notes thereto included in our 2020 Annual Report on Form 10-K filed with the SEC on February 22, 2021. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.

Fiscal Year 

We operate on a 52/53 week fiscal year, whereby the fiscal year ends on the last Saturday of December. Fiscal 2021 and 2020 each contain 52 weeks and the three months ended March 27, 2021 and March 28, 2020 each contained 13 weeks. Fiscal 2021 will end on December 25, 2021.

Significant Accounting Policies

Our significant accounting policies have not changed during the three months ended March 27, 2021 from those disclosed in our Annual Report on Form 10-K for the year ended December 26, 2020.

Reclassifications

Certain immaterial reclassifications were made to the prior year financial statements to conform to the current year presentation.

New Accounting Pronouncements

ASU 2019-12

In December 2019, the Financial Accounting Standard Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. We adopted ASU 2019-12 on a prospective basis on December 27, 2020, the first day of fiscal 2021. The adoption did not have a material effect on our consolidated financial position, results of operations or cash flows.

ASU 2020-04

In March 2020, the FASB issued ASU 2020-04, “Referenced Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The ASU provides temporary optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848),” which permits entities to apply optional expedients in Topic 848 to derivative instruments modified because of discounting transition resulting from reference rate reform. ASU 2020-04 became effective upon issuance and may be applied prospectively to contract modifications made on or before December 31, 2022. ASU 2021-01 became effective upon issuance and may be applied on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020 or prospectively for contract modifications made on or before December 31, 2022. The Company has not yet applied the relief afforded by these standard amendments and is currently assessing contracts that will require modification due to reference rate reform to which these standard amendments may be applied.

9

Note 2 — Concentration of Credit and Other Risks

Each of the following customers accounted for 10% or more of our revenues for the periods indicated:

	Three Months Ended
	March 27, 2021		March 28, 2020
Intel Corporation	28.1	%	36.2	%
Taiwan Semiconductor Manufacturing Co., LTD.	11.5	%	*
	39.6	%	36.2	%

*Represents less than 10% of total revenues.

At March 27, 2021, one customer accounted for 22.8% of gross accounts receivable. At December 26, 2020, two customers accounted for 15.3% and 13.7% of gross accounts receivable, respectively.

Note 3 — Inventories, net

Inventories are stated at the lower of cost (principally standard cost, which approximates actual cost on a first in, first out basis) or net realizable value.

Inventories, net, consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Raw materials	$	52,320	$	48,122
Work-in-progress	35,466		30,806
Finished goods	16,941		20,301
	$	104,727	$	99,229

Note 4 — Acquisition

High Precision Devices, Inc. Acquisition

On October 19, 2020, we acquired 100% of the shares of HPD for total consideration of $16.9 million, net of cash acquired of $1.7 million, which included an estimated adjustment for changes in working capital, which is not yet finalized. This acquisition brings highly specialized skills and know-how to address the unique test challenges within the emerging quantum computing, superconducting computing, and ultra-sensitive sensor markets which operate at temperatures as low as 30 millikelvin.

The acquisition was accounted for using the acquisition method of accounting, with FormFactor treated as the acquirer. The acquired assets and liabilities of HPD were recorded at their respective fair values including an amount for goodwill representing the difference between the acquisition consideration and the fair value of the identifiable net assets.

Our Condensed Consolidated Statements of Income include the financial results of HPD subsequent to the acquisition date of October 19, 2020. Revenue in fiscal 2020 related to HPD subsequent to the acquisition date that was included in our Condensed Consolidated Statements of Income was not material.

The acquisition price was allocated to the tangible and identified intangible assets acquired and liabilities assumed as of the closing date of the acquisition based upon their respective fair values. The fair values assigned to assets acquired and liabilities assumed were based on management’s assumptions as of the reporting date.

We estimated the acquisition price and the allocation of fair value to assets acquired and liabilities assumed as of the acquisition date, October 19, 2020. We subsequently made certain immaterial adjustments within the measurement period to the preliminary acquisition price allocation. See Note 5, Goodwill and Intangible Assets, for changes in identified intangible values and goodwill. Our purchase accounting remains open at March 27, 2021, subject to finalization of the fair value of

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consideration and certain deferred tax items. The estimated fair value of assets acquired, including goodwill and intangibles, and liabilities assumed is as follows (in thousands):

	Amount
Cash and cash equivalents	$	1,680
Accounts receivable	1,017
Inventory	3,047
Property, plant and equipment	669
Operating lease, right of use assets	2,554
Prepaid expenses and other current assets	599
Tangible assets acquired	9,566
Deferred revenue	(2,529)
Accounts payable and accrued liabilities	(1,268)
Operating lease liabilities	(2,554)
Deferred tax liabilities	(2,840)
Total tangible assets acquired and liabilities assumed	375
Intangible assets	11,520
Goodwill	6,665
Net Assets Acquired	$	18,560

The intangible assets as of the closing date of the acquisition included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	7,500	10.0
Customer relationships	3,600		5.0
Order backlog	200		0.5
Trade names	220		5.0
Total intangible assets	$	11,520	8.2

The fair value of the intangible assets acquired in connection with the acquisition was determined using either the income, market or replacement cost methodologies. The intangible assets are being amortized over periods which reflect the pattern in which economic benefits of the assets are expected to be realized.

Identifiable Intangible Assets

Valuation of intangible assets involves multiple assumptions. The key assumptions are described below.

Developed technology acquired primarily consists of existing technology related to cryogenic probe stations, Adiabatic Demagnetization Refrigerator (“ADR”), and continuous ADR cryostats and similar tools, and technology related to other cryogenic applications. We valued the developed technology using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return.

The value of customer relationships represents the fair value of future projected revenues that will be derived from the sale of products to HPD's existing customers. We valued customer relationships using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the customers relationships in place on the acquisition date versus having no relationships in place and needing to replicate or replace those relationships. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

Order backlog represents the value of future sales under existing contracts as of the acquisition date. Expected cash flow from order backlog was valued on a discounted direct cash flow basis, net of returns on contributory assets such as working capital, property and equipment, trade name and assembled workforce.

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The identified trade names intangibles relate to the estimated fair value of future cash flows related to the HPD brand. We valued trade names by applying the relief-from-royalty method under the income approach. This method is based on the application of a royalty rate to forecasted revenue under the trade name.

Goodwill

The excess of purchase price over the fair value assigned to the assets acquired and liabilities assumed represents the amount of goodwill resulting from the acquisition. We believe the factors that contributed to goodwill include synergies that are specific to our consolidated business, such as cost savings and operational efficiencies, and the acquisition of a talented workforce that expands our expertise in business development and commercializing semiconductor test products, none of which qualify for recognition as a separate intangible asset. We do not expect any portion of this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition was recorded as a non-current asset and is not amortized, but is subject to an annual review for impairment.

The goodwill arising from the acquisition was allocated to the HPD reporting unit within the Systems reportable segment.

We have not presented unaudited combined pro forma financial information as the HPD acquisition was not significant to our consolidated results of operations and financial position.

Baldwin Park Acquisition

On July 30, 2020, we acquired the probe card assets of Advantest Corporation for total cash consideration of $35.0 million. This acquisition brings important enabling technologies and capabilities for designing and manufacturing advanced probe cards, and adds a complementary 3D-NAND Flash probe-card product that is qualified and in production at one of the world's leading NAND Flash manufacturers.

The acquisition was accounted for using the acquisition method of accounting, with FormFactor treated as the acquirer. The acquired assets and liabilities of Baldwin Park were recorded at their respective fair values including an amount for goodwill representing the difference between the acquisition consideration and the fair value of the identifiable net assets.

Our Condensed Consolidated Statements of Income include the financial results of Baldwin Park subsequent to the acquisition date of July 30, 2020. Revenue related to Baldwin Park since the acquisition date that was included in our Condensed Consolidated Statements of Income for fiscal 2020 was not material.

We estimated the acquisition price and the allocation of fair value to assets acquired and liabilities assumed as of the acquisition date, July 30, 2020. We subsequently made certain immaterial adjustments within the measurement period to the acquisition price allocation as a result of finalization of our valuation of identifiable assets and liabilities. See Note 5, Goodwill and Intangible Assets, for changes in identified intangible values and goodwill. In the current quarter ended March 27, 2021, we finalized our allocation of the assets acquired, including goodwill and intangibles, and liabilities assumed for the purchase as follows (in thousands):

	Amount
Accounts receivable	$	4,365
Inventory	2,727
Property, plant and equipment	9,053
Operating lease, right of use assets	519
Prepaid expenses and other current assets	56
Tangible assets acquired	16,720
Accounts payable and accrued liabilities	(743)
Operating lease liabilities	(519)
Total net tangible assets acquired and liabilities assumed	15,458
Intangible assets	13,600
Goodwill	5,942
Net assets acquired	$	35,000

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The intangible assets as of July 30, 2020 included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	8,800	10.0
Customer relationships	4,400		3.0
In-process research and development	400		N/A
Total intangible assets	$	13,600	7.7

Indications of fair value of the intangible assets acquired in connection with the acquisition were determined using either the income, market or replacement cost methodologies. The intangible assets are being amortized over periods which reflect the pattern in which economic benefits of the assets are expected to be realized.

Identifiable Intangible Assets

Valuation of intangible assets involves multiple assumptions. The key assumptions are described below.

Developed technology acquired consists of existing technology related to 3D NAND Flash probe cards and the value expected to be derived from interconnect technology. We valued the developed technology related to 3D NAND Flash using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return. We valued the interconnect developed technology asset using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the interconnect capability in place on the acquisition date versus having no capability in place and needing to replicate or replace that capability. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

In-process research and development (“IPR&D”) acquired primarily consists of research and development projects that were in process at the time of acquisition related to technologies used in DRAM probe cards. Once these projects are complete they will be amortized over their useful life. We valued the IPR&D using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return.

The value of customer relationships represents the fair value of future projected revenues that will be derived from the sale of products to Baldwin Park's existing customers. We valued customer relationships using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the customers relationships in place on the acquisition date versus having no relationships in place and needing to replicate or replace those relationships. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

Goodwill

The excess of purchase price over the fair value assigned to the assets acquired and liabilities assumed represents the amount of goodwill resulting from the acquisition. We believe the factors that contributed to goodwill include synergies that are specific to our consolidated business, such as cost savings and operational efficiencies, and the acquisition of a talented workforce that expands our expertise in business development, none of which qualify for recognition as a separate intangible asset. We expect this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition was recorded as a non-current asset and is not amortized, but is subject to an annual review for impairment.

The goodwill arising from the acquisition was allocated to the Probe Cards reporting unit within the Probe Cards reportable segment.

We have not presented unaudited combined pro forma financial information as the Baldwin Park acquisition was not significant to our consolidated results of operations and financial position.

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Note 5 — Goodwill and Intangible Assets

Goodwill by reportable segment was as follows (in thousands):

	Probe Cards		Systems		Total
Goodwill, gross, as of December 28, 2019	$	172,482	$	26,714	$	199,196
Addition - FRT GmbH Acquisition	—		975		975
Addition - Baldwin Park Acquisition	5,590		—		5,590
Addition - HPD Acquisition	—		4,654		4,654
Foreign currency translation	—		2,346		2,346
Goodwill, gross, as of December 26, 2020	178,072		34,689		212,761
Addition - Baldwin Park Acquisition	352				352
Addition - HPD Acquisition	—		2,011		2,011
Foreign currency translation	—		(906)		(906)
Goodwill, gross, as of March 27, 2021	$	178,424	$	35,794	$	214,218

We have not recorded goodwill impairments for the three months ended March 27, 2021.

Intangible assets were as follows (in thousands):

	March 27, 2021						December 26, 2020
Intangible Assets	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technologies	$	173,318	$	142,344	$	30,974	$	176,265	$	137,754	$	38,511
Trade names	8,100		7,418		682		8,162		7,363		799
Customer relationships	51,557		34,899		16,658		52,488		33,378		19,110
Backlog	1,969		1,897		72		2,227		1,900		327
In-process research and development	400		—		400		400		—		400
	$	235,344	$	186,558	$	48,786	$	239,542	$	180,395	$	59,147

Amortization expense was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	5,090	$	5,750
Selling, general and administrative	1,715		1,513
	$	6,805	$	7,263

The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	11,933
2022	9,591
2023	7,240
2024	4,625
2025	4,364
Thereafter	10,633
	$	48,386

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Note 6 — Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Accrued compensation and benefits	$	28,092	$	33,110
Accrued income and other taxes	3,008		6,976
Accrued warranty	3,719		3,918
Employee stock purchase plan contributions withheld	2,109		4,240
Accrued contingent consideration	3,884		4,012
Other accrued expenses	2,656		3,086
	$	43,468	$	55,342

Note 7 — Fair Value and Derivative Instruments

Whenever possible, the fair values of our financial assets and liabilities are determined using quoted market prices of identical securities or quoted market prices of similar securities from active markets. The three levels of inputs that may be used to measure fair value are as follows:

•Level 1 valuations are obtained from real-time quotes for transactions in active exchange markets involving identical securities;

•Level 2 valuations utilize significant observable inputs, such as quoted prices for similar assets or liabilities, quoted prices near the reporting date in markets that are less active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

•Level 3 valuations utilize unobservable inputs to the valuation methodology and include our own data about assumptions market participants would use in pricing the asset or liability based on the best information available under the circumstances.

We did not have any transfers of assets or liabilities measured at fair value on a recurring basis to or from Level 1, Level 2 or Level 3 during the three months ended March 27, 2021 or the year ended December 26, 2020.

The carrying values of Cash, Accounts receivable, net, Restricted cash, Prepaid expenses and other current assets, Accounts payable, Accrued liabilities, and term loans, net of unamortized issuance costs, approximate fair value due to their short maturities.

No changes were made to our valuation techniques during the first three months of fiscal 2021.

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Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): 

March 27, 2021	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	34,254	$	—	$	—	$	34,254
Commercial paper	5,500		—		—		5,500
	39,754		—		—		39,754
Marketable securities:
U.S. treasuries	32,669		—		—		32,669
Certificates of deposit	—		1,212		—		1,212
U.S. agency securities	—		575		—		575
Corporate bonds	—		44,146		—		44,146
Commercial paper	—		15,491		—		15,491
	32,669		61,424		—		94,093
Foreign exchange derivative contracts (Designated)	—		144		—		144
Interest rate swap derivative contracts	—		745		—		745
Total assets	$	72,423	$	62,313	$	—	$	134,736
Liabilities:
Foreign exchange derivative contracts (Designated)	$	—	$	(100)	$	—	$	(100)
Interest rate swap derivative contracts	—		(113)		—		(113)
Contingent consideration	—		—		(3,884)		(3,884)
Total liabilities	$	—	$	(213)	$	(3,884)	$	(4,097)

December 26, 2020	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	43,019	$	—	$	—	$	43,019
Marketable securities:
U.S. treasuries	40,726		—		—		40,726
Certificates of deposit	—		2,179		—		2,179
U.S. agency securities	—		575		—		575
Corporate bonds	—		24,330		—		24,330
	40,726		27,084		—		67,810
Foreign exchange derivative contracts	—		1,057		—		1,057
Interest rate swap derivative contracts	—		57		—		57
Total assets	$	83,745	$	28,198	$	—	$	111,943
Liabilities:
Interest rate swap derivative contracts	$	—	$	(87)	$	—	$	(87)
Contingent consideration	—		—		(4,012)		(4,012)
Total liabilities	$	—	$	(87)	$	(4,012)	$	(4,099)

Cash Equivalents

The fair value of our cash equivalents is determined based on quoted market prices for similar or identical securities.

Marketable Securities

We classify our marketable securities as available-for-sale and value them utilizing a market approach. Our investments are priced by pricing vendors who provide observable inputs for their pricing without applying significant judgment. Broker pricing is used mainly when a quoted price is not available, the investment is not priced by our pricing vendors or when a broker price

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is more reflective of fair value. Our broker-priced investments are categorized as Level 2 investments because fair value is based on similar assets without applying significant judgments. In addition, all investments have a sufficient trading volume to demonstrate that the fair value is appropriate.

Unrealized gains and losses were immaterial and were recorded as a component of Accumulated other comprehensive income in our Condensed Consolidated Balance Sheets. We did not have any other-than-temporary unrealized gains or losses at either period end included in these financial statements.

Contingent Consideration

Contingent consideration, arising from the acquisition of FRT, is a cash amount equal to 1.5x EBIT as defined in the purchase agreement, up to a maximum of €10.3 million, payable subject to the performance of the acquired business in calendar 2020. We estimated the fair value of contingent consideration using a probability weighted approach. Key assumptions in determining the fair value of contingent consideration included estimating EBIT levels that we believed as of the acquisition date were likely to be achieved during the performance period and discounting at an appropriate discount rate. Contingent consideration as of March 27, 2021 was estimated to be $3.9 million, with the change from December 26, 2020 resulting from foreign currency translation.

Interest Rate Swaps

The fair value of our interest rate swap contracts is determined at the end of each reporting period based on valuation models that use interest rate yield curves as inputs. For accounting purposes, our interest rate swap contracts qualify for, and are designated as, cash flow hedges. The cash flows associated with the interest rate swaps are reported in Net cash provided by operating activities in our Condensed Consolidated Statements of Cash Flows and the fair value of the interest rate swap contracts are recorded within Accrued liabilities and Other liabilities in our Condensed Consolidated Balance Sheets.

The impact of the interest rate swaps on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)		Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Three Months Ended March 27, 2021	$	624	Interest expense	$	(38)	Interest expense	$	—
Three Months Ended March 28, 2020	$	(96)	Interest expense	$	22	Interest expense	$	—

Foreign Exchange Derivative Contracts

We operate and sell our products in various global markets. As a result, we are exposed to changes in foreign currency exchange rates. We utilize foreign currency forward contracts to hedge against future movements in foreign exchange rates that affect certain existing foreign currency denominated assets and liabilities and forecasted foreign currency revenue and expense transactions. Under this program, our strategy is to have increases or decreases in our foreign currency exposures mitigated by gains or losses on the foreign currency forward contracts in order to mitigate the risks and volatility associated with foreign currency transaction gains or losses.

We do not use derivative financial instruments for speculative or trading purposes. For accounting purposes, certain of our foreign currency forward contracts are not designated as hedging instruments and, accordingly, we record the fair value of these contracts as of the end of our reporting period in our Condensed Consolidated Balance Sheets with changes in fair value recorded within Other income (expense), net in our Condensed Consolidated Statement of Income for both realized and unrealized gains and losses. Certain of our foreign currency forward contracts are designated as cash flow hedges, and, accordingly, we record the fair value of these contracts as of the end of our reporting period in our Condensed Consolidated Balance Sheets with changes in fair value recorded as a component of Accumulated other comprehensive income and reclassified into earnings in the same period in which the hedged transaction affects earnings, and in the same line item on the Condensed Consolidated Statements of Income as the impact of the hedge transaction.

The fair value of our foreign exchange derivative contracts was determined based on current foreign currency exchange rates and forward points. All of our foreign exchange derivative contracts outstanding at March 27, 2021 will mature by the first quarter of fiscal 2022.

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The following table provides information about our foreign currency forward contracts outstanding as of March 27, 2021 (in thousands):

Currency	Contract Position	Contract Amount (Local Currency)	Contract Amount (U.S. Dollars)
Euro Dollar	Buy	(10,141)	$	(12,025)
Euro Dollar	Sell	11,043	13,026
Japanese Yen	Buy	(1,971,765)	(17,977)
Korean Won	Sell	3,129,743	2,767
Taiwan Dollar	Sell	7,972	279
Total USD notional amount of outstanding foreign exchange contracts			$	(13,930)

Our foreign currency contracts are classified within Level 2 of the fair value hierarchy as they are valued using pricing models that utilize observable market inputs.

The impact of foreign exchange derivative contracts not designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

		Amount of Gain (Loss) Recognized on Derivatives
		Three Months Ended
Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized on Derivatives	March 27, 2021		March 28, 2020
Foreign exchange forward contracts	Other income (expense), net	$	1,288	$	(115)

The impact of foreign exchange derivative contracts designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative		Location of Gain (Loss) Reclassified from Accumulated OCI into Income	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Three Months Ended March 27, 2021	$	(526)	Cost of revenues	$	250
			Research and development	30
			Selling, general and administrative	82
				$	362
Three Months Ended March 28, 2020	$	(3)	Cost of revenues	$	(120)
			Research and development	(18)
			Selling, general and administrative	(43)
				$	(181)

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

We measure and report our non-financial assets such as Property, plant and equipment, Goodwill and Intangible assets at fair value on a non-recurring basis if we determine these assets to be impaired or in the period when we make a business acquisition. Other than as discussed in Note 4, Acquisition, there were no assets or liabilities measured at fair value on a nonrecurring basis during the three months ended March 27, 2021 or March 28, 2020.

Note 8 — Warranty

We offer warranties on certain products and record a liability for the estimated future costs associated with warranty claims at the time revenue is recognized. The warranty liability is based upon historical experience and our estimate of the level of future costs. While we engage in product quality programs and processes, our warranty obligation is affected by product failure rates,

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material usage and service delivery costs. We continuously monitor product returns for warranty and maintain a reserve for the related expenses based upon our historical experience and any specifically identified failures. As we sell new products to our customers, we must exercise considerable judgment in estimating the expected failure rates. This estimating process is based on historical experience of similar products, as well as various other assumptions that we believe to be reasonable under the circumstances. We provide for the estimated cost of product warranties at the time revenue is recognized as a component of Cost of revenues in our Condensed Consolidated Statement of Income.

Changes in our warranty liability were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Balance at beginning of period	$	3,918	$	1,942
Accruals	1,374		660
Settlements	(1,573)		(684)
Balance at end of period	$	3,719	$	1,918

Note 9 — Property, Plant and Equipment, net

Property, plant and equipment, net consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Land	$	4,751	$	4,751
Machinery and equipment	233,357		226,185
Computer equipment and software	43,839		36,361
Furniture and fixtures	6,925		6,894
Leasehold improvements	80,011		79,144
Sub-total	368,883		353,335
Less: Accumulated depreciation and amortization	(298,865)		(294,468)
Net, property, plant and equipment	70,018		58,867
Construction-in-process	42,294		45,236
Total	$	112,312	$	104,103

Note 10 — Stockholders’ Equity and Stock-Based Compensation

Common Stock Repurchase Program

On October 26, 2020, our Board of Directors authorized a program to repurchase up to $50 million of outstanding common stock to offset potential dilution from issuances of common stock under our stock-based compensation plans. The share repurchase program will expire on October 28, 2022. During the three months ended March 27, 2021, we repurchased 136,402 shares of common stock for $5.7 million and, as of March 27, 2021, $44.3 million remained available for future repurchases.

Our policy related to repurchases of our common stock is to charge the excess of cost over par value to additional paid-in capital once the shares are retired. All repurchases were made in compliance with Rule 10b-18 under the Securities Exchange Act of 1934, as amended.

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Restricted Stock Units

Restricted stock unit (“RSU”) activity under our equity incentive plan was as follows:

	Units	Weighted Average Grant Date Fair Value
RSUs at December 26, 2020	2,840,922	$	19.80
Awards granted	8,765	46.25
Awards vested	(67,635)	16.38
Awards forfeited	(11,140)	21.21
RSUs at March 27, 2021	2,770,912	19.96

Performance Restricted Stock Units

We may grant Performance RSUs (“PRSUs”) to certain executives, which vest based upon us achieving certain market performance criteria. There were no PRSUs granted during the three months ended March 27, 2021. PRSUs are included as part of the RSU activity above.

Stock Options

Stock option activity under our equity incentive plan was as follows:

	Options Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Outstanding at December 26, 2020	106,000	$	8.35
Options exercised	(50,000)	8.44
Outstanding at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Vested and expected to vest at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Exercisable at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820

Employee Stock Purchase Plan

Information related to activity under our Employee Stock Purchase Plan (“ESPP”) was as follows:

	Three Months Ended
	March 27, 2021
Shares issued	228,784
Weighted average per share purchase price	$	22.14
Weighted average per share discount from the fair value of our common stock on the date of issuance	$	(18.73)

Stock-Based Compensation

Stock-based compensation was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	1,335	$	937
Research and development	1,689		1,439
Selling, general and administrative	4,053		3,247
Total stock-based compensation	$	7,077	$	5,623

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Unrecognized Compensation Costs

At March 27, 2021, the unrecognized stock-based compensation was as follows (dollars in thousands): 

	Unrecognized Expense		Average Expected Recognition Period in Years
Restricted stock units	$	27,429	2.03
Performance restricted stock units	7,719		1.93
Employee stock purchase plan	973		0.86
Total unrecognized stock-based compensation expense	$	36,121	1.99

Note 11 — Net Income per Share

The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):

	Three Months Ended
	March 27, 2021	March 28, 2020
Weighted-average shares used in computing basic net income per share	77,598	76,005
Add potentially dilutive securities	2,390	2,505
Weighted-average shares used in computing diluted net income per share	79,988	78,510
Securities not included as they would have been antidilutive	3	9

Note 12 — Commitments and Contingencies

Leases

See Note 13, Leases.

Contractual Obligations and Commitments

Our contractual obligations and commitments have not materially changed as of March 27, 2021 from those disclosed in our Annual Report on Form 10-K for the year ended December 26, 2020.

Legal Matters

From time to time, we may be subject to legal proceedings and claims in the ordinary course of business. As of March 27, 2021, and as of the filing of this Quarterly Report on Form 10-Q, we were not involved in any material legal proceedings.

Note 13 — Leases

We lease real estate space under non-cancelable operating lease agreements for commercial and industrial space, as well as for our corporate headquarters located in Livermore, California. Our leases have remaining terms of 1 to 8 years, and some leases include options to extend up to 20 years. We also have operating leases for automobiles with remaining lease terms of 1 to 4 years. We did not include any of our renewal options in our lease terms for calculating our lease liability as the renewal options allow us to maintain operational flexibility and we are not reasonably certain we will exercise these options at this time. The weighted-average remaining lease term for our operating leases was 6 years as of March 27, 2021 and the weighted-average discount rate was 3.85%.

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The components of lease expense were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Lease expense:
Operating lease expense	$	2,123	$	1,924
Short-term lease expense	37		40
Variable lease expense	537		383
	$	2,697	$	2,347

Future minimum payments under our non-cancelable operating leases were as follows as of March 27, 2021 (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	6,747
2022	8,040
2023	6,710
2024	6,297
2025	7,814
Thereafter	14,416
Total minimum lease payments	50,024
Less: interest	(8,982)
Present value of net minimum lease payments	41,042
Less: current portion	(7,557)
Total long-term operating lease liabilities	$	33,485

Note 14 — Revenue

Transaction price allocated to the remaining performance obligations: On March 27, 2021, we had $6.3 million of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts and contracts with overtime revenue recognition that are not yet delivered. We expect to recognize approximately 74.5% of our remaining performance obligations as revenue in the remainder of fiscal 2021, approximately 16.6% in fiscal 2022, and approximately 8.9% in fiscal 2023 and thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Contract balances: The timing of revenue recognition may differ from the timing of invoicing to customers. Accounts receivable is recorded at the invoiced amount, net of an allowance for doubtful accounts. A receivable is recognized in the period we deliver goods or provide services or when our right to consideration is unconditional. A contract asset is recorded when we have performed under the contract but our right to consideration is conditional on something other than the passage of time. Contract assets as of March 27, 2021 and December 26, 2020 were $4.8 million and $3.7 million, respectively, and are reported on the Condensed Consolidated Balance Sheets as a component of Prepaid expenses and other current assets.

Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of Deferred revenue and Other liabilities. Contract liabilities as of March 27, 2021 and December 26, 2020 were $19.9 million and $22.2 million, respectively. During the three months ended March 27, 2021, we recognized $9.3 million of revenue, that was included in contract liabilities as of December 26, 2020.

Costs to obtain a contract: We generally expense sales commissions when incurred as a component of Selling, general and administrative expense, as the amortization period is typically less than one year.

Revenue by Category: Refer to Note 15, Operating Segments and Enterprise-Wide Information, for further details.

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Note 15 — Operating Segments and Enterprise-Wide Information

Our chief operating decision maker (“CODM”) is our Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company. We operate in two reportable segments consisting of the Probe Cards segment and the Systems segment. The following table summarizes the operating results by reportable segment (dollars in thousands):

	Three Months Ended
	March 27, 2021												March 28, 2020
	Probe Cards			Systems			Corporate and Other			Total			Probe Cards			Systems			Corporate and Other			Total
Revenues	$	158,898		$	27,738		$	—		$	186,636		$	134,715		$	26,038		$	—		$	160,753
Gross profit	$	70,315		$	13,599		$	(7,208)		$	76,706		$	60,743		$	13,334		$	(6,687)		$	67,390
Gross margin	44.3		%	49.0		%	—		%	41.1		%	45.1		%	51.2		%	—		%	41.9		%

Operating results provide useful information to our management for assessment of our performance and results of operations. Certain components of our operating results are utilized to determine executive compensation along with other measures.

Corporate and Other includes unallocated expenses relating to amortization of intangible assets, inventory and fixed asset fair value adjustments due to acquisitions and share-based compensation, which are not used in evaluating the results of, or in allocating resources to, our reportable segments.

Certain revenue category information by reportable segment was as follows (in thousands):

	Three Months Ended
	March 27, 2021						March 28, 2020
	Probe Cards		Systems		Total		Probe Cards		Systems		Total
Market:
Foundry & Logic	$	113,410	$	—	$	113,410	$	105,745	$	—	$	105,745
DRAM	33,898		—		33,898		24,696		—		24,696
Flash	11,590		—		11,590		4,274		—		4,274
Systems	—		27,738		27,738		—		26,038		26,038
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Timing of revenue recognition:
Products transferred at a point in time	$	158,476	$	24,671	$	183,147	$	134,069	$	24,858	$	158,927
Products and services transferred over time	422		3,067		3,489		646		1,180		1,826
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Geographical region:
Taiwan	$	44,734	$	846	$	45,580	$	30,439	$	1,341	$	31,780
China	37,831		4,794		42,625		37,280		6,362		43,642
United States	21,308		8,178		29,486		25,611		6,305		31,916
Asia-Pacific1	27,878		1,080		28,958		4,455		3,408		7,863
South Korea	18,001		1,084		19,085		13,692		396		14,088
Europe	2,833		7,166		9,999		16,210		4,833		21,043
Japan	5,249		4,072		9,321		5,535		2,835		8,370
Rest of the world	1,064		518		1,582		1,493		558		2,051
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753

1 Asia-Pacific includes all countries in the region except China, Japan, South Korea, and Taiwan, which are disclosed separately.

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

Cautionary Statement Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Securities Exchange Act of 1934 and the Securities Act of 1933, which are subject to risks and uncertainties. The forward-looking statements include statements concerning, among other things, our business strategy, financial and operating results, gross margins, liquidity and capital expenditure requirements and impact of accounting standards. In some cases, you can identify these statements by forward-looking words, such as “may,” “might,” “will,” “could,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “intend” and “continue,” the negative or plural of these words and other comparable terminology.

The forward-looking statements are only predictions based on our current expectations and our projections about future events. All forward-looking statements included in this Quarterly Report on Form 10-Q are based upon information available to us as of the filing date of this Quarterly Report on Form 10-Q. You should not place undue reliance on these forward-looking statements. We have no obligation to update any of these statements. These forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to differ materially from those expressed or implied by these statements, including risks related to general market trends, the benefits of acquisitions and investments, uncertainties related to COVID-19 and the impact of our responses to it, the interpretation and impacts of changes in export controls and other trade barriers, our ability to execute our business strategy and other risks discussed in the section titled “Risk Factors” and elsewhere in our Annual Report on Form 10-K for the year ended December 26, 2020 and in this Quarterly Report on Form 10-Q. You should carefully consider the numerous risks and uncertainties described under these sections.

The following discussion and analysis should be read in conjunction with our condensed consolidated financial statements and the accompanying notes contained in this Quarterly Report on Form 10-Q. Unless expressly stated or the context otherwise requires, the terms “we,” “our,” “us” and “FormFactor” refer to FormFactor, Inc. and its subsidiaries.

Overview

FormFactor, Inc., headquartered in Livermore, California, is a leading provider of test and measurement technologies. We provide a broad range of high-performance probe cards, analytical probes, probe stations, metrology systems, thermal systems and cryogenic systems to both semiconductor companies and scientific institutions. Our products provide electrical and physical information from a variety of semiconductor and electro-optical devices and integrated circuits from early research, through development, to high-volume production. Customers use our products and services to lower production costs, improve yields, and enable development of their complex next-generation products.

We operate in two reportable segments consisting of the Probe Cards segment and the Systems segment. Sales of our probe cards and analytical probes are included in the Probe Cards segment, while sales of our probe stations, metrology systems, and thermal and cryogenic systems are included in the Systems segment.

We generated net income of $19.6 million in the first three months of fiscal 2021 as compared to $15.9 million in the first three months of fiscal 2020. The increase in net income was primarily due to increased revenues, partially offset by higher operating expenses.

Impact of COVID-19

The COVID-19 pandemic continues to cause serious illness and death in many of the regions that we, our customers and our suppliers operate. The COVID-19 pandemic has resulted in significant governmental actions designed to control the spread of the virus, including the imposition of safety requirements and other orders in locations where we have manufacturing and other activities. We have maintained social distancing, contact tracing, and various other measures to enable our manufacturing sites to continue efficient production.

We believe that we operate in a critical infrastructure industry, as defined by the U.S. Department of Homeland Security. This reduces the current and anticipated impacts of the COVID-19 pandemic on our major customers and suppliers, and upon our operations, as compared to companies that are not part of the critical infrastructure. We currently continue to operate in all of our manufacturing sites at production levels comparable to those prior to the pandemic, albeit subject to certain safety and related constraints. Our other operations are similarly continuing with substantial work-from-home activities.

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If the provisions of governmental health orders or other safety requirements applicable to us or our customers or suppliers become more restrictive for an extended period of time, or if we have repeated occurrences of COVID-19 in any of our facilities, we may experience disruptions or delays in manufacturing, product design, product development, customer support, manufacturing and sales, and an overall loss of productivity and efficiency.

While to date the disruptions in our operations, supply chain and customer demand as a result of the COVID-19 pandemic have been somewhat limited, we believe that the COVID-19 pandemic represents a sustained threat that may give rise to a variety of more significant adverse impacts on our business and financial results. For a further description of the uncertainties and business risks associated with the COVID-19 pandemic, see the risk factors discussed in our Annual Report on Form 10-K for the year ended December 26, 2020.

Significant Accounting Policies and the Use of Estimates

Management’s Discussion and Analysis and Note 2, Summary of Significant Accounting Policies, to the Consolidated Financial Statements in our 2020 Annual Report on Form 10-K describe the significant accounting estimates and significant accounting policies used in preparation of the Consolidated Financial Statements. Actual results in these areas could differ from management’s estimates. During the three months ended March 27, 2021, there were no significant changes in our significant accounting policies or estimates from those reported in our Annual Report on Form 10-K for the year ended December 26, 2020, which was filed with the Securities and Exchange Commission on February 22, 2021.

Results of Operations

The following table sets forth our operating results as a percentage of revenues for the periods indicated:

	Three Months Ended
	March 27, 2021		March 28, 2020
Revenues	100.0	%	100.0	%
Cost of revenues	58.9		58.1
Gross profit	41.1		41.9
Operating expenses:
Research and development	12.9		13.2
Selling, general and administrative	16.1		17.2
Total operating expenses	29.0		30.4
Operating income	12.1		11.5
Interest income	0.1		0.4
Interest expense	(0.1)		(0.2)
Other income (expense), net	0.1		(0.1)
Income before income taxes	12.2		11.6
Provision for income taxes	1.7		1.8
Net income	10.5	%	9.8	%

Revenues by Segment and Market

	Three Months Ended
	March 27, 2021		March 28, 2020
	(In thousands)
Probe Cards	$	158,898	$	134,715
Systems	27,738		26,038
	$	186,636	$	160,753

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	Three Months Ended
	March 27, 2021		% of Revenues		March 28, 2020		% of Revenues		$ Change		% Change
	(Dollars in thousands)
Probe Cards Markets:
Foundry & Logic	$	113,410	60.7	%	$	105,745	65.8	%	$	7,665	7.2	%
DRAM	33,898		18.2		24,696		15.4		9,202		37.3
Flash	11,590		6.2		4,274		2.7		7,316		171.2
Systems Market:
Systems	27,738		14.9		26,038		16.1		1,700		6.5
Total revenues	$	186,636	100.0	%	$	160,753	100.0	%	$	25,883	16.1	%

The increase in Foundry & Logic product revenue for the three months ended March 27, 2021, compared to the three months ended March 28, 2020, was driven principally by increased unit sales to large semiconductor foundries and integrated device manufacturers, demonstrating success in diversifying across our strategic accounts. Additionally, sales have increased due to the demand for components and chipsets for 5G handsets, work and study from home infrastructure spending, and adoption of advanced packaging architectures like heterogeneous integration and high-bandwidth memory (“HBM”).

The relative increase in DRAM product revenue for the three months ended March 27, 2021, compared to the three months ended March 28, 2020, was driven by a decreased customer demand for the three months ended March 28, 2020 as a result of the absorption of large purchases in fiscal 2019, that did not recur in the three months ended March 27, 2021.

The increase in Flash product revenue for the three months ended March 27, 2021, compared to the three months ended March 28, 2020, was driven by increased sales as a result of increased customer demand for our legacy products and increased sales resulting from the acquisition of Baldwin Park. Our revenue in this market continues to be highly variable.

The increase in Systems product revenue for the three months ended March 27, 2021, compared to the three months ended March 28, 2020, was driven by increased sales of cryogenic systems due to the acquisition of High Precision Devices, Inc. (“HPD”) and increased sales of thermal sub-systems, partially offset by lower 300mm station sales.

Due to COVID-19, there were various impacts across our segments due to governmental mandates of social distancing. This resulted in a temporary factory shutdown for almost two weeks during our first fiscal quarter of 2020 in certain locations, limiting our manufacturing capacity. We believe these shutdowns negatively affected revenue and impacted our ability to maintain typical lead times, especially in our Probes segment. The plant shutdowns we experienced in the first fiscal quarter of 2020 did not recur in the first fiscal quarter of 2021, which presumably drove some of the increased sales in the first fiscal quarter of 2021 over the first fiscal quarter of 2020, particularly in the Probe Cards segment where the plant shutdowns in 2020 were longer in duration than the shutdowns for the Systems segment.

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Revenues by Geographic Region

	Three Months Ended
	March 27, 2021		% of Revenue		March 28, 2020		% of Revenue
	(Dollars in thousands)
Taiwan	$	45,580	24.4	%	$	31,780	19.8	%
China	42,625		22.8	%	43,642		27.1	%
United States	29,486		15.8	%	31,916		19.9	%
Asia-Pacific1	28,958		15.5	%	7,863		4.9	%
South Korea	19,085		10.2	%	14,088		8.8	%
Europe	9,999		5.4	%	21,043		13.1	%
Japan	9,321		5.0	%	8,370		5.2	%
Rest of the world	1,582		0.9	%	2,051		1.2	%
Total revenues	$	186,636	100.0	%	$	160,753	100.0	%

1 Asia-Pacific includes all countries in the region except China, Japan, South Korea and Taiwan, which are disclosed separately.

Geographic revenue information is based on the location to which we ship the product. For example, if a certain South Korean customer purchases through their U.S. subsidiary and requests the products to be shipped to an address in South Korea, this sale will be reflected in the revenue for South Korea rather than the U.S.

Changes in revenue by geographic region for the three months ended March 27, 2021, compared to the three months ended March 28, 2020, were primarily attributable to changes in customer demand, shifts in customer regional manufacturing strategies, particularly with our large multinational customers, and product sales mix.

Cost of Revenues and Gross Margins

Cost of revenues consists primarily of manufacturing materials, compensation and benefits, shipping and handling costs, manufacturing-related overhead and amortization of certain intangible assets. Our manufacturing operations rely on a limited number of suppliers to provide key components and materials for our products, some of which are a sole source. We order materials and supplies based on backlog and forecasted customer orders. Tooling and setup costs related to changing manufacturing lots at our suppliers are also included in the cost of revenues. We expense all warranty costs, inventory provisions and amortization of certain intangible assets as cost of revenues.

Our gross profit and gross margin were as follows (dollars in thousands):

	Three Months Ended
	March 27, 2021			March 28, 2020			$ Change		% Change
Gross profit	$	76,706		$	67,390		$	9,316	13.8	%
Gross margin	41.1		%	41.9		%

Our gross profit and gross margin by segment were as follows (dollars in thousands):

	Three Months Ended
	March 27, 2021												March 28, 2020
	Probe Cards			Systems			Corporate and Other			Total			Probe Cards			Systems			Corporate and Other			Total
Gross profit	$	70,315		$	13,599		$	(7,208)		$	76,706		$	60,743		$	13,334		$	(6,687)		$	67,390
Gross margin	44.3		%	49.0		%	—		%	41.1		%	45.1		%	51.2		%	—		%	41.9		%

Probe Cards

For the three months ended March 27, 2021, gross profit and gross margins decreased compared to the three months ended March 28, 2020, primarily due to less favorable absorption of costs from the mix of volumes through production sites and due

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to product mix on a less favorable mix of higher gross margin Foundry & Logic probe card sales combined with higher sales of lower gross margin Flash probe cards.

Systems

For the three months ended March 27, 2021, gross margins decreased compared to the three months ended March 28, 2020, primarily as a result of less favorable product mix, largely related to lower sales of stations and related accessories at somewhat reduced gross margins on the lower volumes, partially offset by higher gross margins on higher sales of thermal sub-systems and additional contribution from HPD, which was acquired in the fourth fiscal quarter of 2020.

Corporate and Other

Corporate and Other includes unallocated expenses relating to share-based compensation and amortization of intangible assets, inventory and fixed asset fair value adjustments due to acquisitions which are not used in evaluating the results of, or in allocating resources to, our reportable segments.

Overall

Gross profit and gross margins fluctuate with revenue levels, product mix, selling prices, factory loading and material costs. For the three months ended March 27, 2021, compared to the three months ended March 28, 2020, gross profit and gross margins have decreased, primarily on product mix.

Cost of revenues included stock-based compensation expense as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Stock-based compensation	$	1,335	$	937

Research and Development

	Three Months Ended
	March 27, 2021			March 28, 2020			$ Change		% Change
	(Dollars in thousands)
Research and development	$	24,046		$	21,267		$	2,779	13.1	%
% of revenues	12.9		%	13.2		%

The increase in research and development expenses in the three months ended March 27, 2021 when compared to the corresponding period in the prior year was primarily driven by increased headcount, increased facilities costs in other general operations, higher project material costs, higher stock-based compensation and higher depreciation expense. These increases are primarily related to our recent acquisitions of Baldwin Park and HPD.

A detail of the changes is as follows (in thousands):

	Three Months Ended March 27, 2021 compared to Three Months Ended March 27, 2020
Employee compensation costs	$	1,436
Project material costs	304
Stock-based compensation	250
Depreciation	114
Other general operations	675
	$	2,779

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Research and development included stock-based compensation expense as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Stock-based compensation	$	1,689	$	1,439

Selling, General and Administrative

	Three Months Ended
	March 27, 2021			March 28, 2020			$ Change		% Change
	(Dollars in thousands)
Selling, general and administrative	$	30,015		$	27,693		$	2,322	8.4	%
% of revenues	16.1		%	17.2		%

The increase in selling, general and administrative in the three months ended March 27, 2021 when compared to the corresponding period in the prior year was primarily due to an increase in headcount, higher stock-based compensation, and increase in amortization of intangibles. These increases are primarily related to the acquisitions of Baldwin Park and HPD, partially offset by decreased travel due to travel restrictions.

A detail of the changes is as follows (in thousands):

	Three Months Ended March 27, 2021 compared to Three Months Ended March 27, 2020
Employee compensation	$	2,072
Stock-based compensation	806
Amortization of intangibles	202
Travel related costs	(598)
Consulting fees	(178)
General operating expenses	18
	$	2,322

Selling, general and administrative included stock-based compensation expense as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Stock-based compensation	$	4,053	$	3,247

Interest Income and Interest Expense

	Three Months Ended
	March 27, 2021			March 28, 2020
	(Dollars in thousands)
Interest Income	$	194		$	685
Weighted average balance of cash and investments	$	266,209		$	210,791
Weighted average yield on cash and investments	0.38		%	1.68		%
Interest Expense	$	180		$	318
Average debt outstanding	$	32,263		$	42,854
Weighted average interest rate on debt	1.62		%	2.50		%

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Interest income is earned on our cash, cash equivalents, restricted cash and marketable securities. The decrease in interest income for the three months ended March 27, 2021 compared with the corresponding period of the prior year was attributable to lower investment yields due to the low interest rate environment despite higher invested balances.

Interest expense primarily includes interest on our term loans, interest rate swap derivative contracts, and term loan issuance costs amortization charges. The decrease in interest expense for the three months ended March 27, 2021 compared to the same period of the prior year was primarily due to lower outstanding debt balances due to the pay-off of the CMI Term Loan on June 30, 2020, partially offset by the Building Term Loan that originated in the second quarter of 2020. Interest expense was also lower due to lower average interest rates on the outstanding debt.

Other Income (Expense), Net

Other income (expense), net, primarily includes the effects of foreign currency impact and various other gains and losses.

Provision for Income Taxes

	Three Months Ended
	March 27, 2021			March 28, 2020
	(In thousands, except percentages)
Provision for income taxes	$	3,206		$	2,816
Effective tax rate	14.0		%	15.1		%

Provision for income taxes reflects the tax provision on our operations in foreign and U.S. jurisdictions, offset by tax benefits from tax credits and the foreign-derived intangible income (“FDII”) deduction. Our effective tax rate may vary from period to period based on changes in estimated taxable income or loss by jurisdiction, changes to the valuation allowance, changes to U.S. federal, state or foreign tax laws, changes in ASC 718 stock-based compensation expense/benefit, future expansion into areas with varying country, state, and local income tax rates, and deductibility of certain costs and expenses by jurisdiction. We have utilized our previous net operating loss carryforwards, and expect the FDII deduction and corresponding benefit to be available, resulting in a decrease from the U.S. statutory rate and included in our worldwide effective tax rate for the year ending December 25, 2021.

Liquidity and Capital Resources

Capital Resources

Our working capital was $351.5 million at March 27, 2021, compared to $332.5 million at December 26, 2020.

Cash and cash equivalents primarily consist of deposits held at banks and money market funds. Marketable securities primarily consist of U.S. treasuries and corporate bonds. We typically invest in highly-rated securities with low probabilities of default. Our investment policy requires investments to be rated single A or better, and limits the types of acceptable investments, issuer concentration and duration of the investment.

Our cash, cash equivalents and marketable securities totaled approximately $267.7 million at March 27, 2021, compared to $255.0 million at December 26, 2020. We believe that we will be able to satisfy our working capital requirements and scheduled term loan repayments for at least the next twelve months with the liquidity provided by our existing cash, cash equivalents, marketable securities and cash provided by operations. To the extent necessary, we may consider entering into short and long-term debt obligations, raising cash through a stock issuance, or obtaining new financing facilities, which may not be available on terms favorable to us. Our future capital requirements may vary materially from those now planned.

The COVID-19 pandemic has negatively impacted the global economy, disrupted global supply chains and created significant volatility and disruption of financial markets. An extended period of global supply chain and economic disruption could materially affect our business, results of operations, access to sources of liquidity and financial condition.

If we are unsuccessful in maintaining or growing our revenues, maintaining or reducing our cost structure (in response to a potential reduction in demand due to an industry downturn, COVID-19, or other event), or increasing our available cash through debt or equity financings, our cash, cash equivalents and marketable securities may decline.

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We utilize a variety of tax planning and financing strategies to manage our worldwide cash and deploy funds to locations where needed. As part of these strategies, we indefinitely reinvest a portion of our foreign earnings. Should we require additional capital in the United States, we may elect to repatriate indefinitely-reinvested foreign funds or raise capital in the United States.

Cash Flows

The following table sets forth our net cash flows from operating, investing and financing activities:

	Three Months Ended
	March 27, 2021		March 28, 2020
	(In thousands)
Net cash provided by operating activities	$	32,356	$	39,339
Net cash used in investing activities	(39,922)		(5,442)
Net cash used in financing activities	$	(3,768)	$	(9,071)

Operating Activities 

Net cash provided by operating activities for the three months ended March 27, 2021 was primarily attributable to net income of $19.6 million and net non-cash expenses of $27.4 million, further impacted by changes in operating assets and liabilities, as explained below.

Accounts receivable, net, decreased $4.1 million to $103.5 million at March 27, 2021, compared to $107.6 million at December 26, 2020, as a result of lower revenue for the three months ended March 27, 2021, compared to the revenue for the three months ended December 26, 2020.

Inventories, net, increased $5.5 million to $104.7 million at March 27, 2021, compared to $99.2 million at December 26, 2020, as a result of anticipated projected customer demand.

Accounts payable increased $5.7 million to $67.7 million at March 27, 2021, compared to $62.0 million at December 26, 2020, as a result of timing of payments to vendors. Accrued liabilities decreased $11.8 million to $43.5 million at March 27, 2021, compared to $55.3 million at December 26, 2020, as a result of timing of payments for accrued taxes payable, a decrease in accrued variable compensation, decrease in employee compensation accrual, and decrease in employee stock purchase plan accrual from the issuance of common stock to employees under our employee stock purchase plan.

Investing Activities

Net cash used in investing activities for the three months ended March 27, 2021 was primarily related to $13.5 million of acquisition of property, plant and equipment and $26.5 million of net cash used to purchase marketable securities.

Financing Activities

Net cash used in financing activities for the three months ended March 27, 2021 primarily related to $2.4 million of principal payments made towards the repayment of our term loans, $1.1 million related to tax withholding associated with the net share settlements of our equity awards, and $5.7 million used to purchase common stock under our stock repurchase program, partially offset by $5.5 million of proceeds received from issuances of common stock under our employee stock purchase plan and stock option plans.

Debt

FRT Term Loan

On October 25, 2019, we entered into a $23.4 million three-year credit facility loan agreement (the “FRT Term Loan”), to fund the acquisition of FRT GmbH, which we acquired on October 9, 2019.

The FRT Term Loan bears interest at a rate equal to the Euro Interbank Offered Rate (“EURIBOR”) plus 1.75% per annum and will be repaid in quarterly installments of approximately $2.0 million plus interest. The interest rate at March 27, 2021 was 1.21%. As of March 27, 2021, the balance outstanding pursuant to the FRT term loan was $14.4 million.

Building Term Loan

On June 22, 2020, we entered into an $18.0 million 15-year credit facility loan agreement (the “Building Term Loan”). The proceeds of the Building Term Loan were used to finance the purchase a building adjacent to our leased facilities in Livermore, California.

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The Building Term Loan bears interest at a rate equal to the applicable LIBOR rate plus 1.75% per annum. Interest payments are payable in monthly installments over a fifteen-year period. The interest rate at March 27, 2021 was 1.87%. As of March 27, 2021, the balance outstanding pursuant to the Building Term Loan was $17.3 million.

On March 17, 2020, we entered into a forward starting interest rate swap agreement to hedge the interest payments on the Building Term Loan for the notional amount of $18.0 million, and an amortization period that matches the debt. As future levels of LIBOR over the life of the loan are uncertain, we entered into this interest-rate swap agreement to hedge the exposure in interest rate risks associated with movement in LIBOR rates. By entering into the agreement, we convert a floating rate interest at one-month LIBOR plus 1.75% into a fixed rate interest at 2.75%. The interest rate swap also includes a 0% floor that is effective for one year from the date of the swap. As of March 27, 2021, the notional amount of the loan that is subject to this interest rate swap is $17.3 million.

Stock Repurchase Program

In October 2020, our Board of Directors authorized a program to repurchase up to $50.0 million of outstanding common stock to offset potential dilution from issuances of common stock under our stock-based compensation plans. The share repurchase program will expire on October 28, 2022. During the three months ended March 27, 2021, we repurchased 136,402 shares of common stock for $5.7 million and, as of March 27, 2021, $44.3 million remained available for future repurchases.

Contractual Obligations and Commitments

The following table summarizes our significant contractual commitments to make future payments in cash under contractual obligations as of March 27, 2021:

	Payments Due In Fiscal Year
	Remainder 2020		2021		2022		2023		2024		Thereafter		Total
Operating leases	$	6,747	$	8,040	$	6,710	$	6,297	$	7,814	$	14,416	$	50,024
Term loans - principal payments	6,949		9,276		1,050		1,080		1,111		12,258		31,724
Term loans - interest payments (1)	360		373		290		271		248		1,185		2,727
Total	$	14,056	$	17,689	$	8,050	$	7,648	$	9,173	$	27,859	$	84,475

(1) Represents our minimum interest payment commitments at 1.87% per annum for the Building Term Loan and 1.21% per annum for the FRT Term Loan. This also excludes any amounts related to our interest rate swap.

Off-Balance Sheet Arrangements

Historically, we have not participated in transactions that have generated relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As of March 27, 2021, we were not involved in any such off-balance sheet arrangements.

Recent Accounting Pronouncements

See Note 1, Basis of Presentation and New Accounting Pronouncements, of Notes to Condensed Consolidated Financial Statements.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

For financial market risks related to changes in interest rates and foreign currency exchange rates, reference is made to Item 7A “Quantitative and Qualitative Disclosures about Market Risk” contained in Part II of our Annual Report on Form 10-K for the fiscal year ended December 26, 2020. Our exposure to market risk has not changed materially since December 26, 2020.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Based on our management’s evaluation (with the participation of our principal executive officer and principal financial officer), as of the end of the period covered by this report, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, (the “Exchange Act”)) are effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and 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.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) except as described below that occurred during the period covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

We implemented an enterprise resource planning (“ERP”) system in January 2021 that supports our operations and financial reporting for two of our factories located in Beaverton, Oregon and Theindorf, Germany, in a next step to unify our worldwide ERP system. This significantly impacted our business and financial transaction and reporting processes for these locations. We are taking steps to monitor and maintain appropriate internal control over financial reporting and will continue to evaluate these controls for effectiveness.

Limitations on the Effectiveness of Controls

Control systems, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control systems’ objectives are being met. Further, the design of any control systems must reflect the fact that there are resource constraints, and the benefits of all controls must be considered relative to their costs. 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, within our company have been detected. These inherent limitations include the realities that judgments in decision making can be faulty and that breakdowns can occur because of a simple error or mistake. Control systems can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls is based, in part, on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

CEO and CFO Certifications

We have attached as exhibits to this Quarterly Report on Form 10-Q the certifications of our Chief Executive Officer and Chief Financial Officer, which are required in accordance with the Exchange Act. We recommend that this Item 4 be read in conjunction with the certifications for a more complete understanding of the subject matter presented. 

PART II - OTHER INFORMATION

Item 1A. Risk Factors

There have been no material changes during the three months ended March 27, 2021 to the risk factors discussed in our Annual Report on Form 10-K for the year ended December 26, 2020. If any of the identified risks actually occur, our business, financial condition and results of operations could suffer. The trading price of our common stock could decline and you may lose all or part of your investment in our common stock. The risks and uncertainties described in our Annual Report on Form 10-K for the year ended December 26, 2020 are not the only ones we face. Additional risks that we currently do not know about or that we currently believe to be immaterial may also impair our business operations.

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

Repurchase of Common Stock

The following table summarizes our repurchases of outstanding common stock for the three months ended March 27, 2021:

Period (fiscal months)	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(1)	Maximum Amount that May Yet Be Purchased Under the Plans or Programs
December 27, 2020 - January 23, 2021	—	$	—	—	$	50,000,000
January 24, 2021 - February 20, 2021	—	$	—	—	$	50,000,000
February 21, 2021 - March 27, 2021	136,402	$	42.07	136,402	$	44,261,568
	136,402	42.07		136,402

1 In October 2020, our Board of Directors authorized a program to repurchase up to $50.0 million of outstanding common stock to offset potential dilution from issuances of our common stock under our employee stock purchase plan and equity incentive plan. Under the authorized stock repurchase program, we may repurchase shares from time to time on the open market. The pace of repurchase activity will depend on levels of cash generation, current stock price and other factors. The program may be modified or discontinued at any time. The share repurchase program will expire on October 28, 2022.

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Item 6. Exhibits

The following exhibits are filed herewith and this list constitutes the exhibit index.

Exhibit		Incorporated by Reference			Filed
Number	Exhibit Description	Form	Date	Number	Herewith
3.1	Amended and Restated Certificate of Incorporation of the Registrant as filed with the Delaware Secretary of State on June 17, 2003	S-1	October 20, 2003	3.01
3.2	Amended and Restated Bylaws of the Registrant	8-K	July 22, 2016	3.2
31.01	Certification of Chief Executive Officer pursuant to 15 U.S.C. Section 7241, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002				X
31.02	Certification of Chief Financial Officer pursuant to 15 U.S.C. Section 7241, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002				X
32.01	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002				*
101	The following financial statements from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 27, 2021, formatted in Inline XBRL: (i) Condensed Consolidated Balance Sheets, (ii) Condensed Consolidated Statements of Income, (iii) Condensed Consolidated Statements of Comprehensive Income, (iv) Condensed Consolidated Statements of Stockholders’ Equity, (v) Condensed Consolidated Statements of Cash Flows, and (vi) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and including detailed tags				X
101.INS	XBRL Instance Document				X
101.SCH	XBRL Taxonomy Extension Schema Document				X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document				X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document				X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document				X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document				X
104	The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 27, 2021, formatted in Inline XBRL (included as Exhibit 101)				X

 ______________________________________

*    This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

35

SIGNATURE

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.

		FormFactor, Inc.
Date:	May 4, 2021	By:	/s/ SHAI SHAHAR
			Shai Shahar
			Chief Financial Officer
			(Duly Authorized Officer, Principal Financial Officer, and Principal Accounting Officer)

36

EX-31.01

Exhibit 31.01

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO 15 U.S.C. SECTION 7241, AS

ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael D. Slessor, certify that:

1.I have reviewed the quarterly report on Form 10-Q of FormFactor, 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 the quarterly report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

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 4, 2021	/s/ MICHAEL D. SLESSOR
		Michael D. Slessor Chief Executive Officer (Principal Executive Officer and Director)

EX-31.02

Exhibit 31.02

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO 15 U.S.C. SECTION 7241,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Shai Shahar, certify that:

1.I have reviewed the quarterly report on Form 10-Q of FormFactor, 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 the quarterly report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

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 4, 2021	/s/ SHAI SHAHAR
		Shai Shahar Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

EX-32.01

Exhibit 32.01

CERTIFICATION OF

CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of FormFactor, Inc., a Delaware corporation, for the period ended March 27, 2021, as filed with the Securities and Exchange Commission, each of the undersigned officers of FormFactor, Inc. certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his respective knowledge:

1.The quarterly report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the quarterly report fairly presents, in all material respects, the financial condition and results of operations of FormFactor, Inc. for the periods presented therein.

Date:	May 4, 2021	/s/ MICHAEL D. SLESSOR
		Michael D. Slessor Chief Executive Officer (Principal Executive Officer and Director)
Date:	May 4, 2021	/s/ SHAI SHAHAR
		Shai Shahar Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

XML

Cover Page - shares	3 Months Ended
	Mar. 27, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 27, 2021
Document Transition Report	false
Entity File Number	000-50307
Entity Registrant Name	FormFactor, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3711155
Entity Address, Address Line One	7005 Southfront Road
Entity Address, City or Town	Livermore
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94551
City Area Code	925
Local Phone Number	290-4000
Title of 12(b) Security	Common stock, $0.001 par value
Trading Symbol	FORM
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		77,622,717
Amendment Flag	false
Entity Central Index Key	0001039399
Current Fiscal Year End Date	--12-25
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Current assets:
Cash and cash equivalents	$ 173,616	$ 187,225
Marketable securities	94,093	67,810
Accounts receivable, net of allowance for doubtful accounts of $232 and $248	103,500	107,603
Inventories, net	104,727	99,229
Restricted cash	2,798	1,904
Prepaid expenses and other current assets	19,371	23,303
Total current assets	498,105	487,074
Restricted cash	1,894	1,969
Operating lease, right-of-use-assets	37,208	30,756
Property, plant and equipment, net of accumulated depreciation	112,312	104,103
Goodwill	214,218	212,761
Intangibles, net	48,786	59,147
Deferred tax assets	65,821	66,242
Other assets	1,867	1,165
Total assets	980,211	963,217
Current liabilities:
Accounts payable	67,720	62,045
Accrued liabilities	43,468	55,342
Current portion of term loans, net of unamortized issuance costs	9,260	9,516
Deferred revenue	18,644	20,964
Operating lease liabilities	7,557	6,704
Total current liabilities	146,649	154,571
Term loans, less current portion, net of unamortized issuance costs	22,390	24,978
Deferred tax liabilities	4,965	5,346
Long-term operating lease liabilities	33,485	27,996
Other liabilities	6,189	6,242
Total liabilities	213,678	219,133
Stockholders’ equity:
Common stock, $0.001 par value	78	78
Treasury stock, at cost, 136,402 and — shares	(5,738)	0
Additional paid-in capital	915,136	903,838
Accumulated other comprehensive income	3,150	5,886
Accumulated deficit	(146,093)	(165,718)
Total stockholders’ equity	766,533	744,084
Total liabilities and stockholders’ equity	$ 980,211	$ 963,217
Common stock, shares outstanding (in shares)	77,758,530	77,437,997

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 232	$ 248
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	77,758,530	77,437,997
Common stock, shares outstanding (in shares)	77,758,530	77,437,997
Treasury stock (in shares)	136,402	0

XML

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Income Statement [Abstract]
Revenues	$ 186,636	$ 160,753
Cost of revenues	109,930	93,363
Gross profit	76,706	67,390
Operating expenses:
Research and development	24,046	21,267
Selling, general and administrative	30,015	27,693
Total operating expenses	54,061	48,960
Operating income	22,645	18,430
Interest income	194	685
Interest expense	(180)	(318)
Other income (expense), net	172	(91)
Income before income taxes	22,831	18,706
Provision for income taxes	3,206	2,816
Net income	$ 19,625	$ 15,890
Net income per share:
Basic (In dollars per share)	$ 0.25	$ 0.21
Diluted (In dollars per share)	$ 0.25	$ 0.20
Weighted-average number of shares used in per share calculations:
Basic (in shares)	77,598	76,005
Diluted (in shares)	79,988	78,510

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 19,625	$ 15,890
Other comprehensive loss, net of tax:
Translation adjustments and other	(2,379)	(399)
Unrealized losses on available-for-sale marketable securities	(131)	(27)
Unrealized gains (losses) on derivative instruments	(226)	176
Other comprehensive loss, net of tax	(2,736)	(250)
Comprehensive income	$ 16,889	$ 15,640

XML

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 28, 2019		75,764,990	0
Beginning balance at Dec. 28, 2019	$ 640,997	$ 76	$ 0	$ 885,821	$ (659)	$ (244,241)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		311,591
Issuance of common stock under the Employee Stock Purchase Plan	4,066			4,066
Issuance of common stock pursuant to exercise of options (in shares)		55,769
Issuance of common stock pursuant to exercise of options	447	$ 1		446
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		25,901
Issuance of common stock pursuant to exercise of options	(385)	$ 0		(385)
Stock-based compensation	5,652			5,652
Other comprehensive loss	(250)				(250)
Net income	15,890					15,890
Ending balance (in shares) at Mar. 28, 2020		76,158,251	0
Ending balance at Mar. 28, 2020	666,417	$ 77	$ 0	895,600	(909)	(228,351)
Beginning balance (in shares) at Dec. 26, 2020		77,437,997	0
Beginning balance at Dec. 26, 2020	744,084	$ 78	$ 0	903,838	5,886	(165,718)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		228,784
Issuance of common stock under the Employee Stock Purchase Plan	5,065			5,065
Issuance of common stock pursuant to exercise of options (in shares)		50,000
Issuance of common stock pursuant to exercise of options	422	$ 0		422
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		41,749
Issuance of common stock pursuant to exercise of options	(1,141)	$ 0		(1,141)
Purchase of common stock through repurchase program (in shares)			(136,402)
Purchase of common stock through repurchase program	(5,738)		$ (5,738)
Stock-based compensation	6,952			6,952
Other comprehensive loss	(2,736)				(2,736)
Net income	19,625					19,625
Ending balance (in shares) at Mar. 27, 2021		77,758,530	(136,402)
Ending balance at Mar. 27, 2021	$ 766,533	$ 78	$ (5,738)	$ 915,136	$ 3,150	$ (146,093)

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Cash flows from operating activities:
Net income	$ 19,625	$ 15,890
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,130	4,561
Amortization	6,805	7,263
Reduction in the carrying amount of right-of-use assets	1,811	1,511
Stock-based compensation expense	7,077	5,623
Provision for excess and obsolete inventories	3,394	3,287
Other adjustments to reconcile net income to net cash provided by operating activities	2,140	407
Changes in assets and liabilities:
Accounts receivable	3,576	7,803
Inventories	(9,911)	928
Prepaid expenses and other current assets	3,011	(240)
Other assets	(50)	194
Accounts payable	5,722	763
Accrued liabilities	(12,732)	(6,970)
Other liabilities	114	33
Deferred revenues	(2,411)	(123)
Operating lease liabilities	(1,945)	(1,591)
Net cash provided by operating activities	32,356	39,339
Cash flows from investing activities:
Acquisition of property, plant and equipment	(13,470)	(12,050)
Proceeds from sale of a subsidiary	0	40
Purchases of marketable securities	(41,062)	(16,441)
Proceeds from maturities and sales of marketable securities	14,610	23,009
Net cash used in investing activities	(39,922)	(5,442)
Cash flows from financing activities:
Proceeds from issuances of common stock	5,487	4,513
Purchase of common stock through stock repurchase program	(5,738)	0
Tax withholdings related to net share settlements of equity awards	(1,141)	(385)
Principal repayments on term loans	(2,376)	(13,199)
Net cash used in financing activities	(3,768)	(9,071)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,456)	312
Net increase (decrease) in cash, cash equivalents and restricted cash	(12,790)	25,138
Cash, cash equivalents and restricted cash, beginning of period	191,098	147,937
Cash, cash equivalents and restricted cash, end of period	178,308	173,075
Non-cash investing and financing activities:
Change in accounts payable and accrued liabilities related to property, plant and equipment purchases	1,087	(2,116)
Operating lease, right-of-use assets obtained in exchange for lease obligations	8,572	6,307
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net	1,034	2,419
Cash paid for interest	173	291
Reconciliation of cash, cash equivalents and restricted cash:
Total cash, cash equivalents and restricted cash	$ 178,308	$ 173,075

XML

Basis of Presentation and New Accounting Pronouncements

3 Months Ended

Mar. 27, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and New Accounting Pronouncements

Basis of Presentation and New Accounting Pronouncements

Basis of Presentation

The accompanying condensed consolidated financial information of FormFactor, Inc. is unaudited and has been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). However, such information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods. The condensed consolidated financial statements included herein should be read in conjunction with the consolidated financial statements and the notes thereto included in our 2020 Annual Report on Form 10-K filed with the SEC on February 22, 2021. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.

Fiscal Year 

We operate on a 52/53 week fiscal year, whereby the fiscal year ends on the last Saturday of December. Fiscal 2021 and 2020 each contain 52 weeks and the three months ended March 27, 2021 and March 28, 2020 each contained 13 weeks. Fiscal 2021 will end on December 25, 2021.

Significant Accounting Policies

Our significant accounting policies have not changed during the three months ended March 27, 2021 from those disclosed in our Annual Report on Form 10-K for the year ended December 26, 2020.

Reclassifications

Certain immaterial reclassifications were made to the prior year financial statements to conform to the current year presentation.

New Accounting Pronouncements

ASU 2019-12

In December 2019, the Financial Accounting Standard Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. We adopted ASU 2019-12 on a prospective basis on December 27, 2020, the first day of fiscal 2021. The adoption did not have a material effect on our consolidated financial position, results of operations or cash flows.

ASU 2020-04

In March 2020, the FASB issued ASU 2020-04, “Referenced Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The ASU provides temporary optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848),” which permits entities to apply optional expedients in Topic 848 to derivative instruments modified because of discounting transition resulting from reference rate reform. ASU 2020-04 became effective upon issuance and may be applied prospectively to contract modifications made on or before December 31, 2022. ASU 2021-01 became effective upon issuance and may be applied on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020 or prospectively for contract modifications made on or before December 31, 2022. The Company has not yet applied the relief afforded by these standard amendments and is currently assessing contracts that will require modification due to reference rate reform to which these standard amendments may be applied.

XML

Concentration of Credit and Other Risks

3 Months Ended

Mar. 27, 2021

Risks and Uncertainties [Abstract]

Concentration of Credit and Other Risks

Concentration of Credit and Other Risks

Each of the following customers accounted for 10% or more of our revenues for the periods indicated:

	Three Months Ended
	March 27, 2021		March 28, 2020
Intel Corporation	28.1	%	36.2	%
Taiwan Semiconductor Manufacturing Co., LTD.	11.5	%	*
	39.6	%	36.2	%

*Represents less than 10% of total revenues.

At March 27, 2021, one customer accounted for 22.8% of gross accounts receivable. At December 26, 2020, two customers accounted for 15.3% and 13.7% of gross accounts receivable, respectively.

XML

Inventories, net

3 Months Ended

Mar. 27, 2021

Inventory Disclosure [Abstract]

Inventories, net

Inventories, net

Inventories are stated at the lower of cost (principally standard cost, which approximates actual cost on a first in, first out basis) or net realizable value.

Inventories, net, consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Raw materials	$	52,320	$	48,122
Work-in-progress	35,466		30,806
Finished goods	16,941		20,301
	$	104,727	$	99,229

XML

Acquisition

3 Months Ended

Mar. 27, 2021

Business Combinations [Abstract]

Acquisition

Acquisition

High Precision Devices, Inc. Acquisition

On October 19, 2020, we acquired 100% of the shares of HPD for total consideration of $16.9 million, net of cash acquired of $1.7 million, which included an estimated adjustment for changes in working capital, which is not yet finalized. This acquisition brings highly specialized skills and know-how to address the unique test challenges within the emerging quantum computing, superconducting computing, and ultra-sensitive sensor markets which operate at temperatures as low as 30 millikelvin.

The acquisition was accounted for using the acquisition method of accounting, with FormFactor treated as the acquirer. The acquired assets and liabilities of HPD were recorded at their respective fair values including an amount for goodwill representing the difference between the acquisition consideration and the fair value of the identifiable net assets.

Our Condensed Consolidated Statements of Income include the financial results of HPD subsequent to the acquisition date of October 19, 2020. Revenue in fiscal 2020 related to HPD subsequent to the acquisition date that was included in our Condensed Consolidated Statements of Income was not material.

The acquisition price was allocated to the tangible and identified intangible assets acquired and liabilities assumed as of the closing date of the acquisition based upon their respective fair values. The fair values assigned to assets acquired and liabilities assumed were based on management’s assumptions as of the reporting date.

We estimated the acquisition price and the allocation of fair value to assets acquired and liabilities assumed as of the acquisition date, October 19, 2020. We subsequently made certain immaterial adjustments within the measurement period to the preliminary acquisition price allocation. See Note 5, Goodwill and Intangible Assets, for changes in identified intangible values and goodwill. Our purchase accounting remains open at March 27, 2021, subject to finalization of the fair value of

consideration and certain deferred tax items. The estimated fair value of assets acquired, including goodwill and intangibles, and liabilities assumed is as follows (in thousands):

	Amount
Cash and cash equivalents	$	1,680
Accounts receivable	1,017
Inventory	3,047
Property, plant and equipment	669
Operating lease, right of use assets	2,554
Prepaid expenses and other current assets	599
Tangible assets acquired	9,566
Deferred revenue	(2,529)
Accounts payable and accrued liabilities	(1,268)
Operating lease liabilities	(2,554)
Deferred tax liabilities	(2,840)
Total tangible assets acquired and liabilities assumed	375
Intangible assets	11,520
Goodwill	6,665
Net Assets Acquired	$	18,560

The intangible assets as of the closing date of the acquisition included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	7,500	10.0
Customer relationships	3,600		5.0
Order backlog	200		0.5
Trade names	220		5.0
Total intangible assets	$	11,520	8.2

The fair value of the intangible assets acquired in connection with the acquisition was determined using either the income, market or replacement cost methodologies. The intangible assets are being amortized over periods which reflect the pattern in which economic benefits of the assets are expected to be realized.

Identifiable Intangible Assets

Valuation of intangible assets involves multiple assumptions. The key assumptions are described below.

Developed technology acquired primarily consists of existing technology related to cryogenic probe stations, Adiabatic Demagnetization Refrigerator (“ADR”), and continuous ADR cryostats and similar tools, and technology related to other cryogenic applications. We valued the developed technology using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return.

The value of customer relationships represents the fair value of future projected revenues that will be derived from the sale of products to HPD's existing customers. We valued customer relationships using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the customers relationships in place on the acquisition date versus having no relationships in place and needing to replicate or replace those relationships. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

Order backlog represents the value of future sales under existing contracts as of the acquisition date. Expected cash flow from order backlog was valued on a discounted direct cash flow basis, net of returns on contributory assets such as working capital, property and equipment, trade name and assembled workforce.

The identified trade names intangibles relate to the estimated fair value of future cash flows related to the HPD brand. We valued trade names by applying the relief-from-royalty method under the income approach. This method is based on the application of a royalty rate to forecasted revenue under the trade name.

Goodwill

The excess of purchase price over the fair value assigned to the assets acquired and liabilities assumed represents the amount of goodwill resulting from the acquisition. We believe the factors that contributed to goodwill include synergies that are specific to our consolidated business, such as cost savings and operational efficiencies, and the acquisition of a talented workforce that expands our expertise in business development and commercializing semiconductor test products, none of which qualify for recognition as a separate intangible asset. We do not expect any portion of this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition was recorded as a non-current asset and is not amortized, but is subject to an annual review for impairment.

The goodwill arising from the acquisition was allocated to the HPD reporting unit within the Systems reportable segment.

We have not presented unaudited combined pro forma financial information as the HPD acquisition was not significant to our consolidated results of operations and financial position.

Baldwin Park Acquisition

On July 30, 2020, we acquired the probe card assets of Advantest Corporation for total cash consideration of $35.0 million. This acquisition brings important enabling technologies and capabilities for designing and manufacturing advanced probe cards, and adds a complementary 3D-NAND Flash probe-card product that is qualified and in production at one of the world's leading NAND Flash manufacturers.

The acquisition was accounted for using the acquisition method of accounting, with FormFactor treated as the acquirer. The acquired assets and liabilities of Baldwin Park were recorded at their respective fair values including an amount for goodwill representing the difference between the acquisition consideration and the fair value of the identifiable net assets.

Our Condensed Consolidated Statements of Income include the financial results of Baldwin Park subsequent to the acquisition date of July 30, 2020. Revenue related to Baldwin Park since the acquisition date that was included in our Condensed Consolidated Statements of Income for fiscal 2020 was not material.

We estimated the acquisition price and the allocation of fair value to assets acquired and liabilities assumed as of the acquisition date, July 30, 2020. We subsequently made certain immaterial adjustments within the measurement period to the acquisition price allocation as a result of finalization of our valuation of identifiable assets and liabilities. See Note 5, Goodwill and Intangible Assets, for changes in identified intangible values and goodwill. In the current quarter ended March 27, 2021, we finalized our allocation of the assets acquired, including goodwill and intangibles, and liabilities assumed for the purchase as follows (in thousands):

	Amount
Accounts receivable	$	4,365
Inventory	2,727
Property, plant and equipment	9,053
Operating lease, right of use assets	519
Prepaid expenses and other current assets	56
Tangible assets acquired	16,720
Accounts payable and accrued liabilities	(743)
Operating lease liabilities	(519)
Total net tangible assets acquired and liabilities assumed	15,458
Intangible assets	13,600
Goodwill	5,942
Net assets acquired	$	35,000

The intangible assets as of July 30, 2020 included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	8,800	10.0
Customer relationships	4,400		3.0
In-process research and development	400		N/A
Total intangible assets	$	13,600	7.7

Indications of fair value of the intangible assets acquired in connection with the acquisition were determined using either the income, market or replacement cost methodologies. The intangible assets are being amortized over periods which reflect the pattern in which economic benefits of the assets are expected to be realized.

Identifiable Intangible Assets

Valuation of intangible assets involves multiple assumptions. The key assumptions are described below.

Developed technology acquired consists of existing technology related to 3D NAND Flash probe cards and the value expected to be derived from interconnect technology. We valued the developed technology related to 3D NAND Flash using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return. We valued the interconnect developed technology asset using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the interconnect capability in place on the acquisition date versus having no capability in place and needing to replicate or replace that capability. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

In-process research and development (“IPR&D”) acquired primarily consists of research and development projects that were in process at the time of acquisition related to technologies used in DRAM probe cards. Once these projects are complete they will be amortized over their useful life. We valued the IPR&D using the multi-period excess earnings method under the income approach. Using this approach, the estimated fair values were calculated using expected future cash flows from specific products discounted to their net present values at an appropriate risk-adjusted rate of return.

The value of customer relationships represents the fair value of future projected revenues that will be derived from the sale of products to Baldwin Park's existing customers. We valued customer relationships using the incremental cash flow method. This method estimates value based on the incremental cash flow afforded by having the customers relationships in place on the acquisition date versus having no relationships in place and needing to replicate or replace those relationships. The incremental cash flows are then discounted to a present value to arrive at an estimate of fair value for this asset class.

Goodwill

The excess of purchase price over the fair value assigned to the assets acquired and liabilities assumed represents the amount of goodwill resulting from the acquisition. We believe the factors that contributed to goodwill include synergies that are specific to our consolidated business, such as cost savings and operational efficiencies, and the acquisition of a talented workforce that expands our expertise in business development, none of which qualify for recognition as a separate intangible asset. We expect this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition was recorded as a non-current asset and is not amortized, but is subject to an annual review for impairment.

The goodwill arising from the acquisition was allocated to the Probe Cards reporting unit within the Probe Cards reportable segment.

We have not presented unaudited combined pro forma financial information as the Baldwin Park acquisition was not significant to our consolidated results of operations and financial position.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 27, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill by reportable segment was as follows (in thousands):

	Probe Cards		Systems		Total
Goodwill, gross, as of December 28, 2019	$	172,482	$	26,714	$	199,196
Addition - FRT GmbH Acquisition	—		975		975
Addition - Baldwin Park Acquisition	5,590		—		5,590
Addition - HPD Acquisition	—		4,654		4,654
Foreign currency translation	—		2,346		2,346
Goodwill, gross, as of December 26, 2020	178,072		34,689		212,761
Addition - Baldwin Park Acquisition	352				352
Addition - HPD Acquisition	—		2,011		2,011
Foreign currency translation	—		(906)		(906)
Goodwill, gross, as of March 27, 2021	$	178,424	$	35,794	$	214,218

We have not recorded goodwill impairments for the three months ended March 27, 2021.

Intangible assets were as follows (in thousands):

	March 27, 2021						December 26, 2020
Intangible Assets	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technologies	$	173,318	$	142,344	$	30,974	$	176,265	$	137,754	$	38,511
Trade names	8,100		7,418		682		8,162		7,363		799
Customer relationships	51,557		34,899		16,658		52,488		33,378		19,110
Backlog	1,969		1,897		72		2,227		1,900		327
In-process research and development	400		—		400		400		—		400
	$	235,344	$	186,558	$	48,786	$	239,542	$	180,395	$	59,147

Amortization expense was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	5,090	$	5,750
Selling, general and administrative	1,715		1,513
	$	6,805	$	7,263

The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	11,933
2022	9,591
2023	7,240
2024	4,625
2025	4,364
Thereafter	10,633
	$	48,386

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Accrued Liabilities

3 Months Ended

Mar. 27, 2021

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Accrued compensation and benefits	$	28,092	$	33,110
Accrued income and other taxes	3,008		6,976
Accrued warranty	3,719		3,918
Employee stock purchase plan contributions withheld	2,109		4,240
Accrued contingent consideration	3,884		4,012
Other accrued expenses	2,656		3,086
	$	43,468	$	55,342

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Fair Value and Derivative Instruments

3 Months Ended

Mar. 27, 2021

Fair Value Disclosures [Abstract]

Fair Value and Derivative Instruments

Fair Value and Derivative Instruments

Whenever possible, the fair values of our financial assets and liabilities are determined using quoted market prices of identical securities or quoted market prices of similar securities from active markets. The three levels of inputs that may be used to measure fair value are as follows:

•Level 1 valuations are obtained from real-time quotes for transactions in active exchange markets involving identical securities;

•Level 2 valuations utilize significant observable inputs, such as quoted prices for similar assets or liabilities, quoted prices near the reporting date in markets that are less active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

•Level 3 valuations utilize unobservable inputs to the valuation methodology and include our own data about assumptions market participants would use in pricing the asset or liability based on the best information available under the circumstances.

We did not have any transfers of assets or liabilities measured at fair value on a recurring basis to or from Level 1, Level 2 or Level 3 during the three months ended March 27, 2021 or the year ended December 26, 2020.

The carrying values of Cash, Accounts receivable, net, Restricted cash, Prepaid expenses and other current assets, Accounts payable, Accrued liabilities, and term loans, net of unamortized issuance costs, approximate fair value due to their short maturities.

No changes were made to our valuation techniques during the first three months of fiscal 2021.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): 

March 27, 2021	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	34,254	$	—	$	—	$	34,254
Commercial paper	5,500		—		—		5,500
	39,754		—		—		39,754
Marketable securities:
U.S. treasuries	32,669		—		—		32,669
Certificates of deposit	—		1,212		—		1,212
U.S. agency securities	—		575		—		575
Corporate bonds	—		44,146		—		44,146
Commercial paper	—		15,491		—		15,491
	32,669		61,424		—		94,093
Foreign exchange derivative contracts (Designated)	—		144		—		144
Interest rate swap derivative contracts	—		745		—		745
Total assets	$	72,423	$	62,313	$	—	$	134,736
Liabilities:
Foreign exchange derivative contracts (Designated)	$	—	$	(100)	$	—	$	(100)
Interest rate swap derivative contracts	—		(113)		—		(113)
Contingent consideration	—		—		(3,884)		(3,884)
Total liabilities	$	—	$	(213)	$	(3,884)	$	(4,097)

December 26, 2020	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	43,019	$	—	$	—	$	43,019
Marketable securities:
U.S. treasuries	40,726		—		—		40,726
Certificates of deposit	—		2,179		—		2,179
U.S. agency securities	—		575		—		575
Corporate bonds	—		24,330		—		24,330
	40,726		27,084		—		67,810
Foreign exchange derivative contracts	—		1,057		—		1,057
Interest rate swap derivative contracts	—		57		—		57
Total assets	$	83,745	$	28,198	$	—	$	111,943
Liabilities:
Interest rate swap derivative contracts	$	—	$	(87)	$	—	$	(87)
Contingent consideration	—		—		(4,012)		(4,012)
Total liabilities	$	—	$	(87)	$	(4,012)	$	(4,099)

Cash Equivalents

The fair value of our cash equivalents is determined based on quoted market prices for similar or identical securities.

Marketable Securities

We classify our marketable securities as available-for-sale and value them utilizing a market approach. Our investments are priced by pricing vendors who provide observable inputs for their pricing without applying significant judgment. Broker pricing is used mainly when a quoted price is not available, the investment is not priced by our pricing vendors or when a broker price

is more reflective of fair value. Our broker-priced investments are categorized as Level 2 investments because fair value is based on similar assets without applying significant judgments. In addition, all investments have a sufficient trading volume to demonstrate that the fair value is appropriate.

Unrealized gains and losses were immaterial and were recorded as a component of Accumulated other comprehensive income in our Condensed Consolidated Balance Sheets. We did not have any other-than-temporary unrealized gains or losses at either period end included in these financial statements.

Contingent Consideration

Contingent consideration, arising from the acquisition of FRT, is a cash amount equal to 1.5x EBIT as defined in the purchase agreement, up to a maximum of €10.3 million, payable subject to the performance of the acquired business in calendar 2020. We estimated the fair value of contingent consideration using a probability weighted approach. Key assumptions in determining the fair value of contingent consideration included estimating EBIT levels that we believed as of the acquisition date were likely to be achieved during the performance period and discounting at an appropriate discount rate. Contingent consideration as of March 27, 2021 was estimated to be $3.9 million, with the change from December 26, 2020 resulting from foreign currency translation.

Interest Rate Swaps

The fair value of our interest rate swap contracts is determined at the end of each reporting period based on valuation models that use interest rate yield curves as inputs. For accounting purposes, our interest rate swap contracts qualify for, and are designated as, cash flow hedges. The cash flows associated with the interest rate swaps are reported in Net cash provided by operating activities in our Condensed Consolidated Statements of Cash Flows and the fair value of the interest rate swap contracts are recorded within Accrued liabilities and Other liabilities in our Condensed Consolidated Balance Sheets.

The impact of the interest rate swaps on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)		Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Three Months Ended March 27, 2021	$	624	Interest expense	$	(38)	Interest expense	$	—
Three Months Ended March 28, 2020	$	(96)	Interest expense	$	22	Interest expense	$	—

Foreign Exchange Derivative Contracts

We operate and sell our products in various global markets. As a result, we are exposed to changes in foreign currency exchange rates. We utilize foreign currency forward contracts to hedge against future movements in foreign exchange rates that affect certain existing foreign currency denominated assets and liabilities and forecasted foreign currency revenue and expense transactions. Under this program, our strategy is to have increases or decreases in our foreign currency exposures mitigated by gains or losses on the foreign currency forward contracts in order to mitigate the risks and volatility associated with foreign currency transaction gains or losses.

We do not use derivative financial instruments for speculative or trading purposes. For accounting purposes, certain of our foreign currency forward contracts are not designated as hedging instruments and, accordingly, we record the fair value of these contracts as of the end of our reporting period in our Condensed Consolidated Balance Sheets with changes in fair value recorded within Other income (expense), net in our Condensed Consolidated Statement of Income for both realized and unrealized gains and losses. Certain of our foreign currency forward contracts are designated as cash flow hedges, and, accordingly, we record the fair value of these contracts as of the end of our reporting period in our Condensed Consolidated Balance Sheets with changes in fair value recorded as a component of Accumulated other comprehensive income and reclassified into earnings in the same period in which the hedged transaction affects earnings, and in the same line item on the Condensed Consolidated Statements of Income as the impact of the hedge transaction.

The fair value of our foreign exchange derivative contracts was determined based on current foreign currency exchange rates and forward points. All of our foreign exchange derivative contracts outstanding at March 27, 2021 will mature by the first quarter of fiscal 2022.

The following table provides information about our foreign currency forward contracts outstanding as of March 27, 2021 (in thousands):

Currency	Contract Position	Contract Amount (Local Currency)	Contract Amount (U.S. Dollars)
Euro Dollar	Buy	(10,141)	$	(12,025)
Euro Dollar	Sell	11,043	13,026
Japanese Yen	Buy	(1,971,765)	(17,977)
Korean Won	Sell	3,129,743	2,767
Taiwan Dollar	Sell	7,972	279
Total USD notional amount of outstanding foreign exchange contracts			$	(13,930)

Our foreign currency contracts are classified within Level 2 of the fair value hierarchy as they are valued using pricing models that utilize observable market inputs.

The impact of foreign exchange derivative contracts not designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

		Amount of Gain (Loss) Recognized on Derivatives
		Three Months Ended
Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized on Derivatives	March 27, 2021		March 28, 2020
Foreign exchange forward contracts	Other income (expense), net	$	1,288	$	(115)

The impact of foreign exchange derivative contracts designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative		Location of Gain (Loss) Reclassified from Accumulated OCI into Income	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Three Months Ended March 27, 2021	$	(526)	Cost of revenues	$	250
			Research and development	30
			Selling, general and administrative	82
				$	362
Three Months Ended March 28, 2020	$	(3)	Cost of revenues	$	(120)
			Research and development	(18)
			Selling, general and administrative	(43)
				$	(181)

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

We measure and report our non-financial assets such as Property, plant and equipment, Goodwill and Intangible assets at fair value on a non-recurring basis if we determine these assets to be impaired or in the period when we make a business acquisition. Other than as discussed in Note 4, Acquisition, there were no assets or liabilities measured at fair value on a nonrecurring basis during the three months ended March 27, 2021 or March 28, 2020.

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Warranty

3 Months Ended

Mar. 27, 2021

Product Warranties Disclosures [Abstract]

Warranty

Warranty

We offer warranties on certain products and record a liability for the estimated future costs associated with warranty claims at the time revenue is recognized. The warranty liability is based upon historical experience and our estimate of the level of future costs. While we engage in product quality programs and processes, our warranty obligation is affected by product failure rates,

material usage and service delivery costs. We continuously monitor product returns for warranty and maintain a reserve for the related expenses based upon our historical experience and any specifically identified failures. As we sell new products to our customers, we must exercise considerable judgment in estimating the expected failure rates. This estimating process is based on historical experience of similar products, as well as various other assumptions that we believe to be reasonable under the circumstances. We provide for the estimated cost of product warranties at the time revenue is recognized as a component of Cost of revenues in our Condensed Consolidated Statement of Income.

Changes in our warranty liability were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Balance at beginning of period	$	3,918	$	1,942
Accruals	1,374		660
Settlements	(1,573)		(684)
Balance at end of period	$	3,719	$	1,918

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Property, Plant, and Equipment, net

3 Months Ended

Mar. 27, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

Property, Plant and Equipment, net

Property, plant and equipment, net consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Land	$	4,751	$	4,751
Machinery and equipment	233,357		226,185
Computer equipment and software	43,839		36,361
Furniture and fixtures	6,925		6,894
Leasehold improvements	80,011		79,144
Sub-total	368,883		353,335
Less: Accumulated depreciation and amortization	(298,865)		(294,468)
Net, property, plant and equipment	70,018		58,867
Construction-in-process	42,294		45,236
Total	$	112,312	$	104,103

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Stockholders’ Equity and Stock-Based Compensation

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Stockholders’ Equity and Stock-Based Compensation

Stockholders’ Equity and Stock-Based Compensation

Common Stock Repurchase Program

On October 26, 2020, our Board of Directors authorized a program to repurchase up to $50 million of outstanding common stock to offset potential dilution from issuances of common stock under our stock-based compensation plans. The share repurchase program will expire on October 28, 2022. During the three months ended March 27, 2021, we repurchased 136,402 shares of common stock for $5.7 million and, as of March 27, 2021, $44.3 million remained available for future repurchases.

Our policy related to repurchases of our common stock is to charge the excess of cost over par value to additional paid-in capital once the shares are retired. All repurchases were made in compliance with Rule 10b-18 under the Securities Exchange Act of 1934, as amended.

Restricted Stock Units

Restricted stock unit (“RSU”) activity under our equity incentive plan was as follows:

	Units	Weighted Average Grant Date Fair Value
RSUs at December 26, 2020	2,840,922	$	19.80
Awards granted	8,765	46.25
Awards vested	(67,635)	16.38
Awards forfeited	(11,140)	21.21
RSUs at March 27, 2021	2,770,912	19.96

Performance Restricted Stock Units

We may grant Performance RSUs (“PRSUs”) to certain executives, which vest based upon us achieving certain market performance criteria. There were no PRSUs granted during the three months ended March 27, 2021. PRSUs are included as part of the RSU activity above.

Stock Options

Stock option activity under our equity incentive plan was as follows:

	Options Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Outstanding at December 26, 2020	106,000	$	8.35
Options exercised	(50,000)	8.44
Outstanding at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Vested and expected to vest at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Exercisable at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820

Employee Stock Purchase Plan

Information related to activity under our Employee Stock Purchase Plan (“ESPP”) was as follows:

	Three Months Ended
	March 27, 2021
Shares issued	228,784
Weighted average per share purchase price	$	22.14
Weighted average per share discount from the fair value of our common stock on the date of issuance	$	(18.73)

Stock-Based Compensation

Stock-based compensation was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	1,335	$	937
Research and development	1,689		1,439
Selling, general and administrative	4,053		3,247
Total stock-based compensation	$	7,077	$	5,623

Unrecognized Compensation Costs

At March 27, 2021, the unrecognized stock-based compensation was as follows (dollars in thousands): 

	Unrecognized Expense		Average Expected Recognition Period in Years
Restricted stock units	$	27,429	2.03
Performance restricted stock units	7,719		1.93
Employee stock purchase plan	973		0.86
Total unrecognized stock-based compensation expense	$	36,121	1.99

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Net Income per Share

3 Months Ended

Mar. 27, 2021

Earnings Per Share [Abstract]

Net Income per Share

Net Income per Share

The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):

	Three Months Ended
	March 27, 2021	March 28, 2020
Weighted-average shares used in computing basic net income per share	77,598	76,005
Add potentially dilutive securities	2,390	2,505
Weighted-average shares used in computing diluted net income per share	79,988	78,510
Securities not included as they would have been antidilutive	3	9

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Commitments and Contingencies

3 Months Ended

Mar. 27, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Leases

See Note 13, Leases.

Contractual Obligations and Commitments

Our contractual obligations and commitments have not materially changed as of March 27, 2021 from those disclosed in our Annual Report on Form 10-K for the year ended December 26, 2020.

Legal Matters

From time to time, we may be subject to legal proceedings and claims in the ordinary course of business. As of March 27, 2021, and as of the filing of this Quarterly Report on Form 10-Q, we were not involved in any material legal proceedings.

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Leases

3 Months Ended

Mar. 27, 2021

Leases [Abstract]

Leases

LeasesWe lease real estate space under non-cancelable operating lease agreements for commercial and industrial space, as well as for our corporate headquarters located in Livermore, California. Our leases have remaining terms of 1 to 8 years, and some leases include options to extend up to 20 years. We also have operating leases for automobiles with remaining lease terms of 1 to 4 years. We did not include any of our renewal options in our lease terms for calculating our lease liability as the renewal options allow us to maintain operational flexibility and we are not reasonably certain we will exercise these options at this time. The weighted-average remaining lease term for our operating leases was 6 years as of March 27, 2021 and the weighted-average discount rate was 3.85%.

The components of lease expense were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Lease expense:
Operating lease expense	$	2,123	$	1,924
Short-term lease expense	37		40
Variable lease expense	537		383
	$	2,697	$	2,347

Future minimum payments under our non-cancelable operating leases were as follows as of March 27, 2021 (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	6,747
2022	8,040
2023	6,710
2024	6,297
2025	7,814
Thereafter	14,416
Total minimum lease payments	50,024
Less: interest	(8,982)
Present value of net minimum lease payments	41,042
Less: current portion	(7,557)
Total long-term operating lease liabilities	$	33,485

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Revenue

3 Months Ended

Mar. 27, 2021

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Transaction price allocated to the remaining performance obligations: On March 27, 2021, we had $6.3 million of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts and contracts with overtime revenue recognition that are not yet delivered. We expect to recognize approximately 74.5% of our remaining performance obligations as revenue in the remainder of fiscal 2021, approximately 16.6% in fiscal 2022, and approximately 8.9% in fiscal 2023 and thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Contract balances: The timing of revenue recognition may differ from the timing of invoicing to customers. Accounts receivable is recorded at the invoiced amount, net of an allowance for doubtful accounts. A receivable is recognized in the period we deliver goods or provide services or when our right to consideration is unconditional. A contract asset is recorded when we have performed under the contract but our right to consideration is conditional on something other than the passage of time. Contract assets as of March 27, 2021 and December 26, 2020 were $4.8 million and $3.7 million, respectively, and are reported on the Condensed Consolidated Balance Sheets as a component of Prepaid expenses and other current assets.

Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of Deferred revenue and Other liabilities. Contract liabilities as of March 27, 2021 and December 26, 2020 were $19.9 million and $22.2 million, respectively. During the three months ended March 27, 2021, we recognized $9.3 million of revenue, that was included in contract liabilities as of December 26, 2020.

Costs to obtain a contract: We generally expense sales commissions when incurred as a component of Selling, general and administrative expense, as the amortization period is typically less than one year.

Revenue by Category: Refer to Note 15, Operating Segments and Enterprise-Wide Information, for further details.

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Operating Segments and Enterprise-Wide Information

3 Months Ended

Mar. 27, 2021

Segment Reporting [Abstract]

Operating Segments and Enterprise-Wide Information

Operating Segments and Enterprise-Wide Information

Our chief operating decision maker (“CODM”) is our Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company. We operate in two reportable segments consisting of the Probe Cards segment and the Systems segment. The following table summarizes the operating results by reportable segment (dollars in thousands):

	Three Months Ended
	March 27, 2021												March 28, 2020
	Probe Cards			Systems			Corporate and Other			Total			Probe Cards			Systems			Corporate and Other			Total
Revenues	$	158,898		$	27,738		$	—		$	186,636		$	134,715		$	26,038		$	—		$	160,753
Gross profit	$	70,315		$	13,599		$	(7,208)		$	76,706		$	60,743		$	13,334		$	(6,687)		$	67,390
Gross margin	44.3		%	49.0		%	—		%	41.1		%	45.1		%	51.2		%	—		%	41.9		%

Operating results provide useful information to our management for assessment of our performance and results of operations. Certain components of our operating results are utilized to determine executive compensation along with other measures.

Corporate and Other includes unallocated expenses relating to amortization of intangible assets, inventory and fixed asset fair value adjustments due to acquisitions and share-based compensation, which are not used in evaluating the results of, or in allocating resources to, our reportable segments.

Certain revenue category information by reportable segment was as follows (in thousands):

	Three Months Ended
	March 27, 2021						March 28, 2020
	Probe Cards		Systems		Total		Probe Cards		Systems		Total
Market:
Foundry & Logic	$	113,410	$	—	$	113,410	$	105,745	$	—	$	105,745
DRAM	33,898		—		33,898		24,696		—		24,696
Flash	11,590		—		11,590		4,274		—		4,274
Systems	—		27,738		27,738		—		26,038		26,038
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Timing of revenue recognition:
Products transferred at a point in time	$	158,476	$	24,671	$	183,147	$	134,069	$	24,858	$	158,927
Products and services transferred over time	422		3,067		3,489		646		1,180		1,826
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Geographical region:
Taiwan	$	44,734	$	846	$	45,580	$	30,439	$	1,341	$	31,780
China	37,831		4,794		42,625		37,280		6,362		43,642
United States	21,308		8,178		29,486		25,611		6,305		31,916
Asia-Pacific1	27,878		1,080		28,958		4,455		3,408		7,863
South Korea	18,001		1,084		19,085		13,692		396		14,088
Europe	2,833		7,166		9,999		16,210		4,833		21,043
Japan	5,249		4,072		9,321		5,535		2,835		8,370
Rest of the world	1,064		518		1,582		1,493		558		2,051
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753

1 Asia-Pacific includes all countries in the region except China, Japan, South Korea, and Taiwan, which are disclosed separately.

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Basis of Presentation and New Accounting Pronouncements (Policies)

3 Months Ended

Mar. 27, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of PresentationThe accompanying condensed consolidated financial information of FormFactor, Inc. is unaudited and has been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). However, such information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods. The condensed consolidated financial statements included herein should be read in conjunction with the consolidated financial statements and the notes thereto included in our 2020 Annual Report on Form 10-K filed with the SEC on February 22, 2021. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.

Fiscal Year

Fiscal Year 

We operate on a 52/53 week fiscal year, whereby the fiscal year ends on the last Saturday of December. Fiscal 2021 and 2020 each contain 52 weeks and the three months ended March 27, 2021 and March 28, 2020 each contained 13 weeks. Fiscal 2021 will end on December 25, 2021.

Reclassifications

Reclassifications

Certain immaterial reclassifications were made to the prior year financial statements to conform to the current year presentation.

New Accounting Pronouncements

New Accounting Pronouncements

ASU 2019-12

In December 2019, the Financial Accounting Standard Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. We adopted ASU 2019-12 on a prospective basis on December 27, 2020, the first day of fiscal 2021. The adoption did not have a material effect on our consolidated financial position, results of operations or cash flows.

ASU 2020-04

In March 2020, the FASB issued ASU 2020-04, “Referenced Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” The ASU provides temporary optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848),” which permits entities to apply optional expedients in Topic 848 to derivative instruments modified because of discounting transition resulting from reference rate reform. ASU 2020-04 became effective upon issuance and may be applied prospectively to contract modifications made on or before December 31, 2022. ASU 2021-01 became effective upon issuance and may be applied on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020 or prospectively for contract modifications made on or before December 31, 2022. The Company has not yet applied the relief afforded by these standard amendments and is currently assessing contracts that will require modification due to reference rate reform to which these standard amendments may be applied.

Fair Value

Whenever possible, the fair values of our financial assets and liabilities are determined using quoted market prices of identical securities or quoted market prices of similar securities from active markets. The three levels of inputs that may be used to measure fair value are as follows:

•Level 1 valuations are obtained from real-time quotes for transactions in active exchange markets involving identical securities;

•Level 2 valuations utilize significant observable inputs, such as quoted prices for similar assets or liabilities, quoted prices near the reporting date in markets that are less active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

•Level 3 valuations utilize unobservable inputs to the valuation methodology and include our own data about assumptions market participants would use in pricing the asset or liability based on the best information available under the circumstances.

We did not have any transfers of assets or liabilities measured at fair value on a recurring basis to or from Level 1, Level 2 or Level 3 during the three months ended March 27, 2021 or the year ended December 26, 2020.

The carrying values of Cash, Accounts receivable, net, Restricted cash, Prepaid expenses and other current assets, Accounts payable, Accrued liabilities, and term loans, net of unamortized issuance costs, approximate fair value due to their short maturities.

No changes were made to our valuation techniques during the first three months of fiscal 2021.

Assets and Liabilities Measured at Fair Value on a Non-Recurring BasisWe measure and report our non-financial assets such as Property, plant and equipment, Goodwill and Intangible assets at fair value on a non-recurring basis if we determine these assets to be impaired or in the period when we make a business acquisition.

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Concentration of Credit and Other Risks (Tables)

3 Months Ended

Mar. 27, 2021

Risks and Uncertainties [Abstract]

Schedule of Customer Percentage of Revenue

Each of the following customers accounted for 10% or more of our revenues for the periods indicated:

	Three Months Ended
	March 27, 2021		March 28, 2020
Intel Corporation	28.1	%	36.2	%
Taiwan Semiconductor Manufacturing Co., LTD.	11.5	%	*
	39.6	%	36.2	%

*Represents less than 10% of total revenues.

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Inventories, net (Tables)

3 Months Ended

Mar. 27, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory Components

Inventories, net, consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Raw materials	$	52,320	$	48,122
Work-in-progress	35,466		30,806
Finished goods	16,941		20,301
	$	104,727	$	99,229

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Acquisition (Tables)

3 Months Ended

Mar. 27, 2021

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The estimated fair value of assets acquired, including goodwill and intangibles, and liabilities assumed is as follows (in thousands):

	Amount
Cash and cash equivalents	$	1,680
Accounts receivable	1,017
Inventory	3,047
Property, plant and equipment	669
Operating lease, right of use assets	2,554
Prepaid expenses and other current assets	599
Tangible assets acquired	9,566
Deferred revenue	(2,529)
Accounts payable and accrued liabilities	(1,268)
Operating lease liabilities	(2,554)
Deferred tax liabilities	(2,840)
Total tangible assets acquired and liabilities assumed	375
Intangible assets	11,520
Goodwill	6,665
Net Assets Acquired	$	18,560

	Amount
Accounts receivable	$	4,365
Inventory	2,727
Property, plant and equipment	9,053
Operating lease, right of use assets	519
Prepaid expenses and other current assets	56
Tangible assets acquired	16,720
Accounts payable and accrued liabilities	(743)
Operating lease liabilities	(519)
Total net tangible assets acquired and liabilities assumed	15,458
Intangible assets	13,600
Goodwill	5,942
Net assets acquired	$	35,000

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination

The intangible assets as of the closing date of the acquisition included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	7,500	10.0
Customer relationships	3,600		5.0
Order backlog	200		0.5
Trade names	220		5.0
Total intangible assets	$	11,520	8.2

The intangible assets as of July 30, 2020 included (in thousands):

	Amount		Weighted Average Useful Life (in years)
Developed technologies	$	8,800	10.0
Customer relationships	4,400		3.0
In-process research and development	400		N/A
Total intangible assets	$	13,600	7.7

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 27, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Reportable Segments

Goodwill by reportable segment was as follows (in thousands):

	Probe Cards		Systems		Total
Goodwill, gross, as of December 28, 2019	$	172,482	$	26,714	$	199,196
Addition - FRT GmbH Acquisition	—		975		975
Addition - Baldwin Park Acquisition	5,590		—		5,590
Addition - HPD Acquisition	—		4,654		4,654
Foreign currency translation	—		2,346		2,346
Goodwill, gross, as of December 26, 2020	178,072		34,689		212,761
Addition - Baldwin Park Acquisition	352				352
Addition - HPD Acquisition	—		2,011		2,011
Foreign currency translation	—		(906)		(906)
Goodwill, gross, as of March 27, 2021	$	178,424	$	35,794	$	214,218

Schedule of Intangible Assets

Intangible assets were as follows (in thousands):

	March 27, 2021						December 26, 2020
Intangible Assets	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technologies	$	173,318	$	142,344	$	30,974	$	176,265	$	137,754	$	38,511
Trade names	8,100		7,418		682		8,162		7,363		799
Customer relationships	51,557		34,899		16,658		52,488		33,378		19,110
Backlog	1,969		1,897		72		2,227		1,900		327
In-process research and development	400		—		400		400		—		400
	$	235,344	$	186,558	$	48,786	$	239,542	$	180,395	$	59,147

Schedule of Amortization Expense

Amortization expense was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	5,090	$	5,750
Selling, general and administrative	1,715		1,513
	$	6,805	$	7,263

Schedule of Estimated Amortization of Intangible Assets

The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	11,933
2022	9,591
2023	7,240
2024	4,625
2025	4,364
Thereafter	10,633
	$	48,386

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Accrued Liabilities (Tables)

3 Months Ended

Mar. 27, 2021

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Accrued compensation and benefits	$	28,092	$	33,110
Accrued income and other taxes	3,008		6,976
Accrued warranty	3,719		3,918
Employee stock purchase plan contributions withheld	2,109		4,240
Accrued contingent consideration	3,884		4,012
Other accrued expenses	2,656		3,086
	$	43,468	$	55,342

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Fair Value and Derivative Instruments (Tables)

3 Months Ended

Mar. 27, 2021

Fair Value Disclosures [Abstract]

Fair Value Assets Measured on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): 

March 27, 2021	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	34,254	$	—	$	—	$	34,254
Commercial paper	5,500		—		—		5,500
	39,754		—		—		39,754
Marketable securities:
U.S. treasuries	32,669		—		—		32,669
Certificates of deposit	—		1,212		—		1,212
U.S. agency securities	—		575		—		575
Corporate bonds	—		44,146		—		44,146
Commercial paper	—		15,491		—		15,491
	32,669		61,424		—		94,093
Foreign exchange derivative contracts (Designated)	—		144		—		144
Interest rate swap derivative contracts	—		745		—		745
Total assets	$	72,423	$	62,313	$	—	$	134,736
Liabilities:
Foreign exchange derivative contracts (Designated)	$	—	$	(100)	$	—	$	(100)
Interest rate swap derivative contracts	—		(113)		—		(113)
Contingent consideration	—		—		(3,884)		(3,884)
Total liabilities	$	—	$	(213)	$	(3,884)	$	(4,097)

December 26, 2020	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	43,019	$	—	$	—	$	43,019
Marketable securities:
U.S. treasuries	40,726		—		—		40,726
Certificates of deposit	—		2,179		—		2,179
U.S. agency securities	—		575		—		575
Corporate bonds	—		24,330		—		24,330
	40,726		27,084		—		67,810
Foreign exchange derivative contracts	—		1,057		—		1,057
Interest rate swap derivative contracts	—		57		—		57
Total assets	$	83,745	$	28,198	$	—	$	111,943
Liabilities:
Interest rate swap derivative contracts	$	—	$	(87)	$	—	$	(87)
Contingent consideration	—		—		(4,012)		(4,012)
Total liabilities	$	—	$	(87)	$	(4,012)	$	(4,099)

Schedule of the Impact of Cash Flow Hedges on Consolidated Financial Statements

The impact of the interest rate swaps on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)		Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Three Months Ended March 27, 2021	$	624	Interest expense	$	(38)	Interest expense	$	—
Three Months Ended March 28, 2020	$	(96)	Interest expense	$	22	Interest expense	$	—

Schedule of Foreign Currency Forward Contracts

The following table provides information about our foreign currency forward contracts outstanding as of March 27, 2021 (in thousands):

Currency	Contract Position	Contract Amount (Local Currency)	Contract Amount (U.S. Dollars)
Euro Dollar	Buy	(10,141)	$	(12,025)
Euro Dollar	Sell	11,043	13,026
Japanese Yen	Buy	(1,971,765)	(17,977)
Korean Won	Sell	3,129,743	2,767
Taiwan Dollar	Sell	7,972	279
Total USD notional amount of outstanding foreign exchange contracts			$	(13,930)

The impact of foreign exchange derivative contracts designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

	Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative		Location of Gain (Loss) Reclassified from Accumulated OCI into Income	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Three Months Ended March 27, 2021	$	(526)	Cost of revenues	$	250
			Research and development	30
			Selling, general and administrative	82
				$	362
Three Months Ended March 28, 2020	$	(3)	Cost of revenues	$	(120)
			Research and development	(18)
			Selling, general and administrative	(43)
				$	(181)

Schedule of Gains and Losses Related to Non-designated Derivative Instruments

The impact of foreign exchange derivative contracts not designated as cash flow hedges on our Condensed Consolidated Statements of Income was as follows (in thousands):

		Amount of Gain (Loss) Recognized on Derivatives
		Three Months Ended
Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized on Derivatives	March 27, 2021		March 28, 2020
Foreign exchange forward contracts	Other income (expense), net	$	1,288	$	(115)

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Warranty (Tables)

3 Months Ended

Mar. 27, 2021

Product Warranties Disclosures [Abstract]

Reconciliation of Changes in Warranty Liability

Changes in our warranty liability were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Balance at beginning of period	$	3,918	$	1,942
Accruals	1,374		660
Settlements	(1,573)		(684)
Balance at end of period	$	3,719	$	1,918

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Property, Plant, and Equipment, net (Tables)

3 Months Ended

Mar. 27, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment, net consisted of the following (in thousands):

	March 27, 2021		December 26, 2020
Land	$	4,751	$	4,751
Machinery and equipment	233,357		226,185
Computer equipment and software	43,839		36,361
Furniture and fixtures	6,925		6,894
Leasehold improvements	80,011		79,144
Sub-total	368,883		353,335
Less: Accumulated depreciation and amortization	(298,865)		(294,468)
Net, property, plant and equipment	70,018		58,867
Construction-in-process	42,294		45,236
Total	$	112,312	$	104,103

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Stockholders’ Equity and Stock-Based Compensation (Tables)

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Schedule of Restricted Stock Unit Activity

Restricted stock unit (“RSU”) activity under our equity incentive plan was as follows:

	Units	Weighted Average Grant Date Fair Value
RSUs at December 26, 2020	2,840,922	$	19.80
Awards granted	8,765	46.25
Awards vested	(67,635)	16.38
Awards forfeited	(11,140)	21.21
RSUs at March 27, 2021	2,770,912	19.96

Schedule of Stock Option Activity

Stock option activity under our equity incentive plan was as follows:

	Options Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Outstanding at December 26, 2020	106,000	$	8.35
Options exercised	(50,000)	8.44
Outstanding at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Vested and expected to vest at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820
Exercisable at March 27, 2021	56,000	$	8.28	0.92	$	2,078,820

Schedule of ESPP Activity

Information related to activity under our Employee Stock Purchase Plan (“ESPP”) was as follows:

	Three Months Ended
	March 27, 2021
Shares issued	228,784
Weighted average per share purchase price	$	22.14
Weighted average per share discount from the fair value of our common stock on the date of issuance	$	(18.73)

Schedule of Stock-based Compensation

Stock-based compensation was included in our Condensed Consolidated Statements of Income as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	1,335	$	937
Research and development	1,689		1,439
Selling, general and administrative	4,053		3,247
Total stock-based compensation	$	7,077	$	5,623

Schedule of Unrecognized Stock-based Compensation

At March 27, 2021, the unrecognized stock-based compensation was as follows (dollars in thousands): 

	Unrecognized Expense		Average Expected Recognition Period in Years
Restricted stock units	$	27,429	2.03
Performance restricted stock units	7,719		1.93
Employee stock purchase plan	973		0.86
Total unrecognized stock-based compensation expense	$	36,121	1.99

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Net Income per Share (Tables)

3 Months Ended

Mar. 27, 2021

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):

	Three Months Ended
	March 27, 2021	March 28, 2020
Weighted-average shares used in computing basic net income per share	77,598	76,005
Add potentially dilutive securities	2,390	2,505
Weighted-average shares used in computing diluted net income per share	79,988	78,510
Securities not included as they would have been antidilutive	3	9

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Leases (Tables)

3 Months Ended

Mar. 27, 2021

Leases [Abstract]

Components of Lease Expense

The components of lease expense were as follows (in thousands):

	Three Months Ended
	March 27, 2021		March 28, 2020
Lease expense:
Operating lease expense	$	2,123	$	1,924
Short-term lease expense	37		40
Variable lease expense	537		383
	$	2,697	$	2,347

Schedule of Future Minimum Payments Under Leases

Future minimum payments under our non-cancelable operating leases were as follows as of March 27, 2021 (in thousands):

Fiscal Year	Amount
Remainder of 2021	$	6,747
2022	8,040
2023	6,710
2024	6,297
2025	7,814
Thereafter	14,416
Total minimum lease payments	50,024
Less: interest	(8,982)
Present value of net minimum lease payments	41,042
Less: current portion	(7,557)
Total long-term operating lease liabilities	$	33,485

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Operating Segments and Enterprise-Wide Information (Tables)

3 Months Ended

Mar. 27, 2021

Segment Reporting [Abstract]

Schedule of Operating Results by Segment

The following table summarizes the operating results by reportable segment (dollars in thousands):

	Three Months Ended
	March 27, 2021												March 28, 2020
	Probe Cards			Systems			Corporate and Other			Total			Probe Cards			Systems			Corporate and Other			Total
Revenues	$	158,898		$	27,738		$	—		$	186,636		$	134,715		$	26,038		$	—		$	160,753
Gross profit	$	70,315		$	13,599		$	(7,208)		$	76,706		$	60,743		$	13,334		$	(6,687)		$	67,390
Gross margin	44.3		%	49.0		%	—		%	41.1		%	45.1		%	51.2		%	—		%	41.9		%

Disaggregation of Revenue by Segment

Certain revenue category information by reportable segment was as follows (in thousands):

	Three Months Ended
	March 27, 2021						March 28, 2020
	Probe Cards		Systems		Total		Probe Cards		Systems		Total
Market:
Foundry & Logic	$	113,410	$	—	$	113,410	$	105,745	$	—	$	105,745
DRAM	33,898		—		33,898		24,696		—		24,696
Flash	11,590		—		11,590		4,274		—		4,274
Systems	—		27,738		27,738		—		26,038		26,038
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Timing of revenue recognition:
Products transferred at a point in time	$	158,476	$	24,671	$	183,147	$	134,069	$	24,858	$	158,927
Products and services transferred over time	422		3,067		3,489		646		1,180		1,826
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753
Geographical region:
Taiwan	$	44,734	$	846	$	45,580	$	30,439	$	1,341	$	31,780
China	37,831		4,794		42,625		37,280		6,362		43,642
United States	21,308		8,178		29,486		25,611		6,305		31,916
Asia-Pacific1	27,878		1,080		28,958		4,455		3,408		7,863
South Korea	18,001		1,084		19,085		13,692		396		14,088
Europe	2,833		7,166		9,999		16,210		4,833		21,043
Japan	5,249		4,072		9,321		5,535		2,835		8,370
Rest of the world	1,064		518		1,582		1,493		558		2,051
Total	$	158,898	$	27,738	$	186,636	$	134,715	$	26,038	$	160,753

1 Asia-Pacific includes all countries in the region except China, Japan, South Korea, and Taiwan, which are disclosed separately.

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Concentration of Credit and Other Risks (Details) - Customer Concentration Risk	3 Months Ended		12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Revenue from Contract with Customer Benchmark
Concentration Risk [Line Items]
Concentration risk percentage	39.60%	36.20%
Revenue from Contract with Customer Benchmark | Intel Corporation
Concentration Risk [Line Items]
Concentration risk percentage	28.10%	36.20%
Revenue from Contract with Customer Benchmark | Taiwan Semiconductor Manufacturing Co., LTD.
Concentration Risk [Line Items]
Concentration risk percentage	11.50%
Accounts Receivable | Major Customer 1
Concentration Risk [Line Items]
Concentration risk percentage	22.80%		15.30%
Accounts Receivable | Major Customer 2
Concentration Risk [Line Items]
Concentration risk percentage			13.70%

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Inventories, net (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 52,320	$ 48,122
Work-in-progress	35,466	30,806
Finished goods	16,941	20,301
Inventories	$ 104,727	$ 99,229

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Acquisition - Additional Information (Details) $ in Thousands	Oct. 19, 2020 USD ($) millikelvin	Jul. 30, 2020 USD ($)
Baldwin Park
Business Acquisition [Line Items]
Consideration transferred		$ 35,000
High Precision Devices, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage acquired	100.00%
Consideration transferred	$ 16,900
Cash and cash equivalents	$ 1,680
High Precision Devices, Inc. | Minimum
Business Acquisition [Line Items]
Sensor markets, operating temperature | millikelvin	30

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Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Oct. 19, 2020	Jul. 30, 2020	Dec. 28, 2019
Business Acquisition [Line Items]
Goodwill	$ 214,218	$ 212,761			$ 199,196
Baldwin Park
Business Acquisition [Line Items]
Accounts receivable				$ 4,365
Inventory				2,727
Property, plant and equipment				9,053
Operating lease, right of use assets				519
Prepaid expenses and other current assets				56
Tangible assets acquired				16,720
Accounts payable and accrued liabilities				(743)
Operating lease liabilities				(519)
Total tangible assets acquired and liabilities assumed				15,458
Intangible assets				13,600
Goodwill				5,942
Net Assets Acquired				$ 35,000
High Precision Devices, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents			$ 1,680
Accounts receivable			1,017
Inventory			3,047
Property, plant and equipment			669
Operating lease, right of use assets			2,554
Prepaid expenses and other current assets			599
Tangible assets acquired			9,566
Deferred revenue			(2,529)
Accounts payable and accrued liabilities			(1,268)
Operating lease liabilities			(2,554)
Deferred tax liabilities			(2,840)
Total tangible assets acquired and liabilities assumed			375
Intangible assets			11,520
Goodwill			6,665
Net Assets Acquired			$ 18,560

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Acquisition - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	Oct. 19, 2020	Jul. 30, 2020
High Precision Devices, Inc.
Business Acquisition [Line Items]
Amount	$ 11,520
Weighted Average Useful Life (in years)	8 years 2 months 12 days
Baldwin Park
Business Acquisition [Line Items]
Amount		$ 13,600
Weighted Average Useful Life (in years)		7 years 8 months 12 days
Baldwin Park | In-process research and development
Business Acquisition [Line Items]
Amount		$ 400
Developed technologies | High Precision Devices, Inc.
Business Acquisition [Line Items]
Amount	$ 7,500
Weighted Average Useful Life (in years)	10 years
Developed technologies | Baldwin Park
Business Acquisition [Line Items]
Amount		$ 8,800
Weighted Average Useful Life (in years)		10 years
Customer relationships | High Precision Devices, Inc.
Business Acquisition [Line Items]
Amount	$ 3,600
Weighted Average Useful Life (in years)	5 years
Customer relationships | Baldwin Park
Business Acquisition [Line Items]
Amount		$ 4,400
Weighted Average Useful Life (in years)		3 years
Order backlog | High Precision Devices, Inc.
Business Acquisition [Line Items]
Amount	$ 200
Weighted Average Useful Life (in years)	6 months
Trade names | High Precision Devices, Inc.
Business Acquisition [Line Items]
Amount	$ 220
Weighted Average Useful Life (in years)	5 years

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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 27, 2021	Dec. 26, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 212,761	$ 199,196
Foreign currency translation	(906)	2,346
Goodwill, ending balance	214,218	212,761
FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		975
Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period	352	5,590
High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	2,011	4,654
Probe Cards
Goodwill [Roll Forward]
Goodwill, beginning balance	178,072	172,482
Foreign currency translation	0	0
Goodwill, ending balance	178,424	178,072
Probe Cards | FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		0
Probe Cards | Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period	352	5,590
Probe Cards | High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	0	0
Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	34,689	26,714
Foreign currency translation	(906)	2,346
Goodwill, ending balance	35,794	34,689
Systems | FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		975
Systems | Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period		0
Systems | High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	$ 2,011	$ 4,654

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Goodwill and Intangible Assets - Additional information (Details)	3 Months Ended
	Mar. 27, 2021 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, impairment loss	$ 0

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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Finite-Lived Intangible Assets [Line Items]
Gross	$ 235,344	$ 239,542
Accumulated Amortization	186,558	180,395
Net	48,786	59,147
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Gross	173,318	176,265
Accumulated Amortization	142,344	137,754
Net	30,974	38,511
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross	8,100	8,162
Accumulated Amortization	7,418	7,363
Net	682	799
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross	51,557	52,488
Accumulated Amortization	34,899	33,378
Net	16,658	19,110
Order backlog
Finite-Lived Intangible Assets [Line Items]
Gross	1,969	2,227
Accumulated Amortization	1,897	1,900
Net	72	327
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Gross	400	400
Accumulated Amortization	0	0
Net	$ 400	$ 400

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Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 6,805	$ 7,263
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]
Remainder of 2021	11,933
2022	9,591
2023	7,240
2024	4,625
2025	4,364
Thereafter	10,633
Net	48,386
Cost of revenues
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	5,090	5,750
Selling, general and administrative
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 1,715	$ 1,513

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Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 28,092	$ 33,110
Accrued income and other taxes	3,008	6,976
Accrued warranty	3,719	3,918
Employee stock purchase plan contributions withheld	2,109	4,240
Accrued contingent consideration	3,884	4,012
Other accrued expenses	2,656	3,086
Accrued liabilities	$ 43,468	$ 55,342

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Fair Value and Derivative Instruments - Fair Value Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	$ 39,754
Marketable securities	94,093	$ 67,810
Total assets	134,736	111,943
Contingent consideration	(3,884)	(4,012)
Total liabilities	(4,097)	(4,099)
Foreign exchange derivative contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	(100)
Foreign exchange derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	144	1,057
Interest rate swap derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	745	57
Derivative liability	(113)	(87)
Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	34,254	43,019
Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	5,500
Marketable securities	15,491
U.S. treasuries
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	32,669	40,726
Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	1,212	2,179
U.S. agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	575	575
Corporate bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	44,146	24,330
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	39,754
Marketable securities	32,669	40,726
Total assets	72,423	83,745
Contingent consideration	0	0
Total liabilities	0	0
Level 1 | Foreign exchange derivative contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	0
Level 1 | Foreign exchange derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	0	0
Level 1 | Interest rate swap derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	0	0
Derivative liability	0	0
Level 1 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	34,254	43,019
Level 1 | Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	5,500
Marketable securities	0
Level 1 | U.S. treasuries
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	32,669	40,726
Level 1 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 1 | U.S. agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 1 | Corporate bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0
Marketable securities	61,424	27,084
Total assets	62,313	28,198
Contingent consideration	0	0
Total liabilities	(213)	(87)
Level 2 | Foreign exchange derivative contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	(100)
Level 2 | Foreign exchange derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	144	1,057
Level 2 | Interest rate swap derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	745	57
Derivative liability	(113)	(87)
Level 2 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Level 2 | Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0
Marketable securities	15,491
Level 2 | U.S. treasuries
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 2 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	1,212	2,179
Level 2 | U.S. agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	575	575
Level 2 | Corporate bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	44,146	24,330
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0
Marketable securities	0	0
Total assets	0	0
Contingent consideration	(3,884)	(4,012)
Total liabilities	(3,884)	(4,012)
Level 3 | Foreign exchange derivative contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	0
Level 3 | Foreign exchange derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	0	0
Level 3 | Interest rate swap derivative contracts | Designated as hedging instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	0	0
Derivative liability	0	0
Level 3 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Level 3 | Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0
Marketable securities	0
Level 3 | U.S. treasuries
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 3 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 3 | U.S. agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	0	0
Level 3 | Corporate bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	$ 0	$ 0

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Fair Value and Derivative Instruments - Additional Information (Details) $ in Thousands, € in Millions	Oct. 09, 2019 EUR (€)	Mar. 27, 2021 USD ($)	Dec. 26, 2020 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration | $		$ 3,884	$ 4,012
FRT
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration, calculation amount, multiple of EBIT	150.00%
FRT | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration | €	€ 10.3

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Fair Value and Derivative Instruments - Impact of Cash Flow Hedges and Derivatives (Details) - Designated as hedging instrument - Interest rate contracts - Cash flow hedging - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 624	$ (96)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (38)	$ 22

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Fair Value and Derivative Instruments - Foreign Currency Forward Contracts (Details) - Mar. 27, 2021 - Foreign exchange forward contracts € in Thousands, ₩ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands	EUR (€)	USD ($)	JPY (¥)	KRW (₩)	TWD ($)
Derivative [Line Items]
Derivative, notional amount		$ (13,930)
Buy | Euro Dollar
Derivative [Line Items]
Derivative, notional amount	€ (10,141)	(12,025)
Buy | Japanese Yen
Derivative [Line Items]
Derivative, notional amount		(17,977)	¥ (1,971,765)
Sell | Euro Dollar
Derivative [Line Items]
Derivative, notional amount	€ (11,043)	(13,026)
Sell | Korean Won
Derivative [Line Items]
Derivative, notional amount		(2,767)		₩ (3,129,743)
Sell | Taiwan Dollar
Derivative [Line Items]
Derivative, notional amount		$ (279)			$ (7,972)

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Fair Value and Derivative Instruments - Gains and Losses Related to Non-designated Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Derivatives Not Designated as Hedging Instruments | Foreign exchange forward contracts | Location of Gain (Loss) Recognized on Derivatives
Derivatives, Fair Value [Line Items]
Derivatives Not Designated as Hedging Instruments	$ 1,288	$ (115)

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Fair Value and Derivative Instruments - Impact of Foreign Exchange Derivattive Contracts Designated as Cash Flow Hedges (Details) - Foreign exchange forward contracts - Designated as hedging instrument - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative	$ (526)	$ (3)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	362	(181)
Cost of revenues
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	250	(120)
Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	30	(18)
Selling, general and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 82	$ (43)

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Fair Value and Derivative Instruments - Assets Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($)	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	$ 134,736,000	$ 111,943,000
Liabilities measured at fair value on non-recurring basis	4,097,000	$ 4,099,000
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	0		$ 0
Liabilities measured at fair value on non-recurring basis	$ 0		$ 0

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Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 3,918	$ 1,942
Accruals	1,374	660
Settlements	(1,573)	(684)
Balance at end of period	$ 3,719	$ 1,918

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Property, Plant, and Equipment, net (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Property, Plant and Equipment [Line Items]
Sub-total	$ 368,883	$ 353,335
Less: Accumulated depreciation and amortization	(298,865)	(294,468)
Net, property, plant and equipment	70,018	58,867
Construction-in-process	42,294	45,236
Total	112,312	104,103
Land
Property, Plant and Equipment [Line Items]
Sub-total	4,751	4,751
Machinery and equipment
Property, Plant and Equipment [Line Items]
Sub-total	233,357	226,185
Computer equipment and software
Property, Plant and Equipment [Line Items]
Sub-total	43,839	36,361
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Sub-total	6,925	6,894
Leasehold improvements
Property, Plant and Equipment [Line Items]
Sub-total	$ 80,011	$ 79,144

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Stockholders’ Equity and Stock-Based Compensation - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 27, 2021	Oct. 26, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of common stock through repurchase program	$ (5,738,000)
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program authorized amount		$ 50,000,000
Purchase of common stock through repurchase program (in shares)	(136,402)
Amount remaining for future repurchases	$ 44,300,000
Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	0

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Stockholders’ Equity and Stock-Based Compensation - Restricted Stock Unit Activity (Details) - Equity Incentive Plan	3 Months Ended
	Mar. 27, 2021 $ / shares shares
Units
Awards granted (in shares)	0
Restricted Stock Units
Units
Beginning balance (in shares)	2,840,922
Awards granted (in shares)	8,765
Awards vested (in shares)	(67,635)
Awards canceled (in shares)	(11,140)
Ending balance (in shares)	2,770,912
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 19.80
Awards granted (in dollars per share) | $ / shares	46.25
Awards vested (in dollars per share) | $ / shares	16.38
Awards canceled (in dollars per share) | $ / shares	21.21
Ending balance (in dollars per share) | $ / shares	$ 19.96

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Stockholders’ Equity and Stock-Based Compensation - Stock Option Activity (Details) - Equity Incentive Plan $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 27, 2021 USD ($) $ / shares shares
Options Outstanding
Outstanding, beginning of period (in shares) | shares	106,000
Options exercised (in shares) | shares	(50,000)
Outstanding, end of period (in shares) | shares	56,000
Vested and expected to vest (in shares) | shares	56,000
Exercisable (in shares) | shares	56,000
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share) | $ / shares	$ 8.35
Options exercised (in dollars per share) | $ / shares	8.44
Outstanding, end of period (in dollars per share) | $ / shares	8.28
Vested and expected to vest (in dollars per share) | $ / shares	8.28
Exercisable (in dollars per share) | $ / shares	$ 8.28
Additional Disclosures
Outstanding, weighted average remaining contractual life	11 months 1 day
Vested and expected to vest, weighted average remaining contractual life	11 months 1 day
Exercisable, weighted average remaining contractual life	11 months 1 day
Outstanding, aggregate intrinsic value | $	$ 2,078,820
Vested end expected to vest, aggregate intrinsic value | $	2,078,820
Exercisable, aggregate intrinsic value | $	$ 2,078,820

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Stockholders’ Equity and Stock-Based Compensation - ESPP Activity (Details) - Employee stock purchase plan	3 Months Ended
	Mar. 27, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares) | shares	228,784
Weighted average per share purchase price (in dollars per share)	$ 22.14
Weighted average per share discount from the fair value of our common stock on the date of issuance (in dollars per share)	$ (18.73)

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Stockholders’ Equity and Stock-Based Compensation - Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation	$ 7,077	$ 5,623
Cost of revenues
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation	1,335	937
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation	1,689	1,439
Selling, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation	$ 4,053	$ 3,247

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Stockholders’ Equity and Stock-Based Compensation - Unrecognized Compensation Costs (Details) $ in Thousands	3 Months Ended
	Mar. 27, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 36,121
Average Expected Recognition Period in Years	1 year 11 months 26 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 27,429
Average Expected Recognition Period in Years	2 years 10 days
Performance restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 7,719
Average Expected Recognition Period in Years	1 year 11 months 4 days
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Expense	$ 973
Average Expected Recognition Period in Years	10 months 9 days

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Net Income per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Earnings Per Share [Abstract]
Weighted-average shares used in computing basic net income per share (in shares)	77,598	76,005
Add potentially dilutive securities (in shares)	2,390	2,505
Weighted-average shares used in computing diluted net income per share (in shares)	79,988	78,510
Securities not included as they would have been antidilutive (in shares)	3	9

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Leases - Narrative (Details)	Mar. 27, 2021
Lessee, Lease, Description [Line Items]
Operating lease, renewal term	20 years
Operating lease, weighted average remaining lease term	6 years
Operating lease, weighted average discount rate	3.85%
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	8 years
Automobiles | Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	1 year
Automobiles | Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	4 years

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Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Leases [Abstract]
Operating lease expense	$ 2,123	$ 1,924
Short-term lease expense	37	40
Variable lease expense	537	383
Total lease expense	$ 2,697	$ 2,347

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Leases - Schedule of Future Minimum Payments Under Leases (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Leases [Abstract]
Remainder of 2021	$ 6,747
2022	8,040
2023	6,710
2024	6,297
2025	7,814
Thereafter	14,416
Total minimum lease payments	50,024
Less: interest	(8,982)
Present value of net minimum lease payments	41,042
Less: current portion	(7,557)	$ (6,704)
Long-term operating lease liabilities	$ 33,485	$ 27,996

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Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2021	Dec. 26, 2020
Revenue from Contract with Customer [Abstract]
Performance obligations	$ 6.3
Contract assets	4.8	$ 3.7
Contract liabilities	19.9	$ 22.2
Revenue recognized included in contracts	$ 9.3

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Revenue - Remaining Performance Obligation (Details)	Mar. 27, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	74.50%
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-26
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	16.60%
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	8.90%
Revenue, remaining performance obligation, expected timing of satisfaction, period

XML

Operating Segments and Enterprise-Wide Information - Additional Information (Details)	3 Months Ended
	Mar. 27, 2021 segment
Segment Reporting [Abstract]
Number of reportable segments	2

XML

Operating Segments and Enterprise-Wide Information - Operating Results by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Segment Reporting Information [Line Items]
Revenues	$ 186,636	$ 160,753
Gross profit	$ 76,706	$ 67,390
Gross margin	41.10%	41.90%
Probe Cards
Segment Reporting Information [Line Items]
Revenues	$ 158,898	$ 134,715
Systems
Segment Reporting Information [Line Items]
Revenues	27,738	26,038
Operating segments | Probe Cards
Segment Reporting Information [Line Items]
Revenues	158,898	134,715
Gross profit	$ 70,315	$ 60,743
Gross margin	44.30%	45.10%
Operating segments | Systems
Segment Reporting Information [Line Items]
Revenues	$ 27,738	$ 26,038
Gross profit	$ 13,599	$ 13,334
Gross margin	49.00%	51.20%
Operating segments | Corporate and Other
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0
Gross profit	$ (7,208)	$ (6,687)
Gross margin	0.00%	0.00%

XML

Operating Segments and Enterprise-Wide Information - Revenue by Segment, Recognition Type, and Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 186,636	$ 160,753
Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	158,898	134,715
Systems
Disaggregation of Revenue [Line Items]
Revenues	27,738	26,038
Taiwan
Disaggregation of Revenue [Line Items]
Revenues	45,580	31,780
Taiwan | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	44,734	30,439
Taiwan | Systems
Disaggregation of Revenue [Line Items]
Revenues	846	1,341
China
Disaggregation of Revenue [Line Items]
Revenues	42,625	43,642
China | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	37,831	37,280
China | Systems
Disaggregation of Revenue [Line Items]
Revenues	4,794	6,362
United States
Disaggregation of Revenue [Line Items]
Revenues	29,486	31,916
United States | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	21,308	25,611
United States | Systems
Disaggregation of Revenue [Line Items]
Revenues	8,178	6,305
Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues	28,958	7,863
Asia-Pacific | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	27,878	4,455
Asia-Pacific | Systems
Disaggregation of Revenue [Line Items]
Revenues	1,080	3,408
South Korea
Disaggregation of Revenue [Line Items]
Revenues	19,085	14,088
South Korea | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	18,001	13,692
South Korea | Systems
Disaggregation of Revenue [Line Items]
Revenues	1,084	396
Europe
Disaggregation of Revenue [Line Items]
Revenues	9,999	21,043
Europe | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	2,833	16,210
Europe | Systems
Disaggregation of Revenue [Line Items]
Revenues	7,166	4,833
Japan
Disaggregation of Revenue [Line Items]
Revenues	9,321	8,370
Japan | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	5,249	5,535
Japan | Systems
Disaggregation of Revenue [Line Items]
Revenues	4,072	2,835
Rest of the world
Disaggregation of Revenue [Line Items]
Revenues	1,582	2,051
Rest of the world | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	1,064	1,493
Rest of the world | Systems
Disaggregation of Revenue [Line Items]
Revenues	518	558
Products transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues	183,147	158,927
Products transferred at a point in time | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	158,476	134,069
Products transferred at a point in time | Systems
Disaggregation of Revenue [Line Items]
Revenues	24,671	24,858
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenues	3,489	1,826
Products and services transferred over time | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	422	646
Products and services transferred over time | Systems
Disaggregation of Revenue [Line Items]
Revenues	3,067	1,180
Foundry & Logic
Disaggregation of Revenue [Line Items]
Revenues	113,410	105,745
Foundry & Logic | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	113,410	105,745
Foundry & Logic | Systems
Disaggregation of Revenue [Line Items]
Revenues	0	0
DRAM
Disaggregation of Revenue [Line Items]
Revenues	33,898	24,696
DRAM | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	33,898	24,696
DRAM | Systems
Disaggregation of Revenue [Line Items]
Revenues	0	0
Flash
Disaggregation of Revenue [Line Items]
Revenues	11,590	4,274
Flash | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	11,590	4,274
Flash | Systems
Disaggregation of Revenue [Line Items]
Revenues	0	0
Systems
Disaggregation of Revenue [Line Items]
Revenues	27,738	26,038
Systems | Probe Cards
Disaggregation of Revenue [Line Items]
Revenues	0	0
Systems | Systems
Disaggregation of Revenue [Line Items]
Revenues	$ 27,738	$ 26,038

XML

Label	Element	Value
Restricted Cash, Noncurrent	us-gaap_RestrictedCashNoncurrent	$ 1,894,000
Restricted Cash, Noncurrent	us-gaap_RestrictedCashNoncurrent	1,361,000
Restricted Cash, Current	us-gaap_RestrictedCashCurrent	2,798,000
Restricted Cash, Current	us-gaap_RestrictedCashCurrent	$ 2,107,000