Intevac (IVAC) 10-Q 1 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 01, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	IVAC
Entity Registrant Name	INTEVAC INC
Entity Central Index Key	1,001,902
Current Fiscal Year End Date	--12-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,360,973

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 16,306	$ 19,941
Short-term investments	19,093	15,698
Trade and other accounts receivable, net of allowances of $0 at both March 31, 2018 and at December 30, 2017	18,503	20,474
Inventories	35,573	33,792
Prepaid expenses and other current assets	2,306	2,524
Total current assets	91,781	92,429
Property, plant and equipment, net	12,180	12,478
Long-term investments	4,277	6,849
Restricted cash	1,000	1,000
Intangible assets, net of amortization of $7,038 at March 31, 2018 and $6,884 at December 30, 2017	1,349	1,503
Deferred income taxes and other long-term assets	783	764
Total assets	111,370	115,023
Current liabilities:
Accounts payable	4,970	3,949
Accrued payroll and related liabilities	3,605	6,818
Other accrued liabilities	9,845	7,688
Customer advances	11,708	11,026
Total current liabilities	30,128	29,481
Other long-term liabilities	2,724	2,879
Stockholders' equity:
Common stock, $0.001 par value	22	22
Additional paid-in capital	180,070	177,521
Treasury stock, 4,845 shares at both March 31, 2018 and December 30, 2017	(28,489)	(28,489)
Accumulated other comprehensive income	566	490
Accumulated deficit	(73,651)	(66,881)
Total stockholders' equity	78,518	82,663
Total liabilities and stockholders' equity	$ 111,370	$ 115,023

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Net of allowances of trade, note and other accounts receivable	$ 0	$ 0
Net of amortization of intangible assets	$ 7,038	$ 6,884
Common stock, par value	$ 0.001	$ 0.001
Treasury stock, shares	4,845	4,845

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net revenues:
Systems and components	$ 15,472	$ 28,423
Technology development	2,502	1,965
Total net revenues	17,974	30,388
Cost of net revenues:
Systems and components	10,728	15,674
Technology development	2,371	1,667
Total cost of net revenues	13,099	17,341
Gross profit	4,875	13,047
Operating expenses:
Research and development	4,167	4,682
Selling, general and administrative	5,829	6,274
Total operating expenses	9,996	10,956
Income (loss) from operations	(5,121)	2,091
Interest income and other income (expense), net	145	110
Income (loss) before income taxes	(4,976)	2,201
Provision for income taxes	160	372
Net income (loss)	$ (5,136)	$ 1,829
Net income (loss) per share:
Basic	$ (0.23)	$ 0.09
Diluted	$ (0.23)	$ 0.08
Weighted average common shares outstanding:
Basic	22,107	21,216
Diluted	22,107	22,790

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net income (loss)	$ (5,136)	$ 1,829
Other comprehensive income, before tax:
Change in unrealized net gain (loss) on available-for-sale investments	(28)	4
Foreign currency translation gains	104	34
Other comprehensive income, before tax	76	38
Income tax provision related to items in other comprehensive income	0	0
Other comprehensive income, net of tax	76	38
Comprehensive income (loss)	$ (5,060)	$ 1,867

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Operating activities
Net income (loss)	$ (5,136)	$ 1,829
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	1,043	1,015
Net amortization (accretion) of investment premiums and discounts	(18)	28
Equity-based compensation	817	1,077
Change in the fair value of acquisition-related contingent consideration	(1)	80
Changes in operating assets and liabilities	(752)	(6,010)
Total adjustments	1,089	(3,810)
Net cash used in operating activities	(4,047)	(1,981)
Investing activities
Purchases of investments	(10,161)	(3,944)
Proceeds from sales and maturities of investments	9,328	5,850
Purchases of leasehold improvements and equipment	(592)	(1,448)
Net cash provided by (used in) investing activities	(1,425)	458
Financing activities
Proceeds from issuance of common stock	2,065	1,083
Taxes paid related to net share settlement	(333)	(1,210)
Payment of acquisition-related contingent consideration		(2)
Net cash provided by (used in) financing activities	1,732	(129)
Effect of exchange rate changes on cash and cash equivalents	105	34
Net decrease in cash, cash equivalents and restricted cash	(3,635)	(1,618)
Cash, cash equivalents and restricted cash at beginning of period	20,941	28,645
Cash, cash equivalents and restricted cash at end of period	$ 17,306	$ 27,027

Description of Business and Bas

Description of Business and Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Description of Business and Basis of Presentation	1. Description of Business and Basis of Presentation Intevac, Inc. (together with its subsidiaries “Intevac” or the “Company”) is a provider of vacuum deposition equipment for a wide variety of thin-film applications, and a leading provider of digital night-vision technologies and products to the defense industry. The Company leverages its core capabilities in high-volume manufacturing of small substrates to provide process manufacturing equipment solutions to the hard disk drive (“HDD”), display cover panel (“DCP”), and photovoltaic (“PV”) solar cell industries. Intevac also provides sensors, cameras and systems for government applications such as night vision. Intevac’s customers include manufacturers of hard disk media, DCPs and solar cells as well as the U.S. government and its agencies, allies and contractors. Intevac reports two segments: Thin-film Equipment (“TFE”) and Photonics. In the opinion of management, except for the changes below, the unaudited interim condensed consolidated financial statements of Intevac included herein have been prepared on a basis consistent with the December 30, 2017 audited consolidated financial statements and include all material adjustments, consisting of normal recurring adjustments, necessary to fairly present the information set forth therein. The Company adopted Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers, with a date of the initial application of December 31, 2017. As a result, the Company has changed its accounting policy for revenue recognition as detailed below. These unaudited interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in Intevac’s Annual Report on Form 10-K 10-K”). The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make judgments, estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements Recently Issued Accounting Standard Not Yet Adopted In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2018-02, 2018-02 ASU 2018-02 Adoption of New Accounting Standard ASU 2014-09, In our TFE segment, a majority of our equipment sales revenue continues to be recognized when products are shipped from our manufacturing facilities. Revenue recognition for our equipment sales arrangements, which includes systems, technology upgrades, service and spare parts, remains materially consistent with our historical practice. Under the new revenue standard, in our TFE segment, we recognize revenue for equipment sales at a point in time following the transfer of control of such products to the customer, which typically occurs upon shipment or delivery depending on the terms of the underlying contracts. Our contracts with customers may include multiple performance obligations. For such arrangements, under the new revenue standard we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling prices based on the prices charged to customers or using expected cost plus margin. Under the new revenue standard, the expected costs associated with our base warranties continue to be recognized as expense when the equipment is sold. Under the new revenue standard, in our Photonics segment, we recognize revenue for cost plus fixed fee (“CPFF”) and firm fixed priced (“FFP”) government contracts over time under the cost-to-cost non-U.S. cost-to-cost The majority of our contracts in our Photonics segment have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product lifecycle (development and production). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Under the new revenue standard, in our Photonics segment, we recognize revenue for homogenous manufactured military products sold to the U.S. government and its contractors over time under the units-of-delivery units-of-delivery The nature of our contracts in our Photonics segment gives rise to several types of variable consideration including tiered pricing. Allocation of contract revenues among Photonics military products, and the timing of the recognition of those revenues, is impacted by agreements with tiered pricing or variable rate structures. We include variable consideration in the estimated transaction price when there is a basis to reasonably estimate the amount of the consideration. These estimates are based on historical experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. Accounting for CPFF and FFP contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For these contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events. These assumptions include the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up We recorded a cumulative effect adjustment to the beginning balance of our consolidated December 31, 2017 balance sheet for the impact of the allocation and the timing of the recognition of revenues for an open Photonics military product agreement with a tiered pricing structure. This change will also result in increased revenue in subsequent periods from this agreement. The cumulative effect of the changes made to our consolidated December 31, 2017 balance sheet for the adoption of the new revenue standard were as follows (in thousands): Balance at December 30, Adjustments Due to ASC 606 Balance at December 31, Other accrued liabilities $ 7,688 $ 1,634 $ 9,322 Accumulated deficit $ (66,881 ) $ (1,634 ) $ (68,515 ) In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statement of operations was as follows (in thousands): Consolidated Statement of Operations For the Three Months Ended March 31, 2018 As Reported Balances ASC 606 Effect of Net revenues: Systems and components $ 15,472 $ 15,343 $ 129 Technology development 2,502 2,502 — Total net revenues 17,974 17,845 129 Cost of net revenues: Systems and components 10,728 10,728 — Technology development 2,371 2,371 — Total cost of net revenues 13,099 13,099 — Gross profit 4,875 4,746 129 Operating expenses: Research and development 4,167 4,167 — Selling, general and administrative 5,829 5,829 — Total operating expenses 9,996 9,996 — Loss from operations (5,121 ) (5,250 ) 129 Interest income and other income (expense), net 145 145 — Loss before income taxes (4,976 ) (5,105 ) 129 Provision for income taxes 160 160 — Net loss $ (5,136 ) $ (5,265 ) $ 129 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select consolidated balance sheet line items was as follows (in thousands): Consolidated Balance Sheet As of March 31, 2018 As Balances without ASC 606 Effect of Other accrued liabilities $ 9,845 $ 8,340 $ 1,505 Total current liabilities $ 30,128 $ 28,623 $ 1,505 Accumulated deficit $ (73,651 ) $ (72,146 ) $ (1,505 ) Total stockholders’ equity $ 78,518 $ 80,023 $ (1,505 )

Revenue

Revenue	3 Months Ended
	Mar. 31, 2018
Revenue	3. Revenue The following tables represent a disaggregation of revenue from contracts with customers for the three months ended March 31, 2018 and April 1, 2017 along with the reportable segment for each category. As noted above the prior period amounts have not been adjusted under the modified retrospective method. Major Products and Service Lines TFE Three Months Ended March 31, 2018 Three Months Ended April 1, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 10,393 $ 1 $ 2 $ 10,396 $ 7,281 $ 12,787 $ — $ 20,068 Field service 2,355 — 38 2,393 1,408 — 8 1,416 Total TFE net revenues $ 12,748 $ 1 $ 40 $ 12,789 $ 8,689 $ 12,787 $ 8 $ 21,484 Three Months Ended Photonics March 31,2018 April 1,2017 (In thousands) Products: Military products $ 2,254 $ 6,705 Commercial products — 46 Repair and other services 429 188 Total Photonics product net revenues 2,683 6,939 Technology development: FFP 692 1,084 CPFF 1,790 881 Time and materials 20 — Total technology development net revenues 2,502 1,965 Total Photonics net revenues $ 5,185 $ 8,904 Primary Geographical Markets Three Months Ended Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 1,911 $ 4,762 $ 6,673 $ 613 $ 8,589 $ 9,202 Asia 10,878 — 10,878 20,871 — 20,871 Europe — 293 293 — 315 315 Rest of World — 130 130 — — — Total net revenues $ 12,789 $ 5,185 $ 17,974 $ 21,484 $ 8,904 $ 30,388 Timing of Revenue Recognition Three Months Ended March 31, 2018 TFE Photonics Total (In thousands) Products transferred at a point in time $ 12,789 $ 429 $ 13,218 Products and services transferred over time — 4,756 4,756 $ 12,789 $ 5,185 $ 17,974 The following table reflects the changes in our contract assets, which we classify as accounts receivable, unbilled or retainage and our contract liabilities which we classify as deferred revenue and customer advances for the three months ended March 31, 2018: March 31, 2018 December 30, 2017 Three Months Change (In thousands) TFE: Contract assets: Accounts receivable, unbilled $ 854 $ 1,368 $ (514 ) Contract liabilities: Deferred revenue $ 5,319 $ 5,190 $ 129 Customer advances 11,092 10,204 888 $ 16,411 $ 15,394 $ 1,017 Photonics: Contract assets: Accounts receivable, unbilled $ 1,692 $ 1,346 $ 346 Retainage 288 281 7 $ 1,980 $ 1,627 $ 353 Contract liabilities: Deferred revenue $ 1,602 $ 97 $ 1,505 Customer advances 616 822 (206 ) $ 2,218 $ 919 $ 1,299 Accounts receivable, unbilled in our TFE segment represents a contract asset for revenue that has been recognized in advance of billing the customer. For our system and certain upgrade sales, our TFE customers generally pay in three installments, with a portion of the system price billed upon receipt of an order, a portion of the price billed upon shipment, and the balance of the price due upon completion of installation and acceptance of the system at the customer’s factory. Accounts receivable, unbilled in our TFE segment generally represents the balance of the system price that is due upon completion of installation and acceptance less the amount that has been deferred as revenue for the performance of the installation tasks. During the three months ended March 31, 2018 contract assets in our TFE segment decreased by $514,000 primarily due to the final billing on two systems that completed installation and were accepted by the customer, offset by the accrual of revenue for an additional system delivered in the quarter that was pending acceptance as of March 31, 2018. Customer advances in our TFE segment generally represent amounts billed to the customer prior to transferring goods which represents a contract liability. The Company has elected to use the practical expedient to disregard the effect of the time value of money in a significant financing component when its payment terms are less than one year. These contract advances are liquidated when revenue is recognized. Deferred revenue in our TFE segment generally represents amounts billed to a customer for completed systems at the customer site that are undergoing installation and acceptance testing where transfer of control has not yet occurred as Intevac does not yet have a demonstrated history of meeting the acceptance criteria upon the customer’s receipt of product and represents a contract liability. During the three months ended March 31, 2018 we recognized revenue in our TFE segment of $2.1 million and $39,000 that was included in customer advances and deferred revenue, respectively, at the beginning of the period. Accounts receivable, unbilled in our Photonics segment represents a contract asset for revenue that has been recognized in advance of billing the customer, which is common for contracts in the defense industry. In our Photonics segment, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals (e.g., monthly) or upon achievement of contractual milestones. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. Our contracts with the U.S. government may also contain retainage provisions. Retainage represents a contract asset for the portion of the contract price earned by us for work performed, but held for payment by the U.S. government as a form of security until satisfactory completion of the contract. The retainage is billable upon completion of the contract performance and approval of final indirect expense rates by the government. During the three months ended March 31, 2018 contract assets in our TFE segment increased by $353,000 primarily due to the accrual of revenue for incurred costs under CPFF contracts. Customer advances in our Photonics segment generally represent deposits from customers upon contract execution and upon achievement of contractual milestones which represents a contract liability. These deposits are liquidated when revenue is recognized. Deferred revenue in our Photonics segment includes $1.6 million deferred for the impact of the allocation and the timing of the recognition of revenues for a military product agreement with a tiered pricing structure. Deferred revenue in our Photonics segment also includes incurred costs under CPFF contracts pending approval of final indirect expense rates by the government and represents a contract liability. During the three months ended March 31, 2018 we recognized revenue in our Photonics segment of $206,000 and $129,000 that was included in customer advances and deferred revenue, respectively, at the beginning of the period. On March 31, 2018 we had $66.9 million of remaining performance obligations, which we also refer to as total backlog. Backlog at March 31, 2018 consisted of $55.6 million of TFE backlog and $11.3 million of Photonics backlog. We expect to recognize approximately 78% of our remaining performance obligations as revenue in 2018, and the balance in 2019.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2018
Inventories	4. Inventories Inventories are stated at the lower of average cost or market and consist of the following: March 31, December 30, 2018 2017 (In thousands) Raw materials $ 15,458 $ 19,881 Work-in-progress 15,622 9,433 Finished goods 4,493 4,478 $ 35,573 $ 33,792 Finished goods inventory consists primarily of completed systems at customer sites that are undergoing installation and acceptance testing.

Equity-Based Compensation

Equity-Based Compensation	3 Months Ended
	Mar. 31, 2018
Equity-Based Compensation	5. Equity-Based Compensation At March 31, 2018, Intevac had equity-based awards outstanding under the 2012 Equity Incentive Plan and the 2004 Equity Incentive Plan (together, the “Plans”) and the 2003 Employee Stock Purchase Plan (the “ESPP”). Intevac’s stockholders approved all of these plans. The Plans permit the grant of incentive or non-statutory The ESPP provides that eligible employees may purchase Intevac’s common stock through payroll deductions at a price equal to 85% of the lower of the fair market value at the entry date of the applicable offering period or at the end of each applicable purchase interval. Offering periods are generally two years in length, and consist of a series of six-month six-month Compensation Expense The effect of recording equity-based compensation for the three-month periods ended March 31, 2018 and April 1, 2017 was as follows: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Equity-based compensation by type of award: Stock options $ 134 $ 255 RSUs 406 718 Employee stock purchase plan 277 104 Total equity-based compensation $ 817 $ 1,077 Beginning January 1, 2017, Intevac accounts for forfeitures as they occur, rather than by estimating expected forfeitures. The net cumulative effect of this change was recognized as a $1.1 million increase to the accumulated deficit as of January 1, 2017. Stock Options and ESPP The fair value of stock options and ESPP awards is estimated at the grant date using the Black-Scholes option valuation model. The determination of fair value of stock options and ESPP awards on the date of grant using an option-pricing model is affected by Intevac’s stock price as well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, our expected stock price volatility over the term of the awards, and actual employee stock option exercise behavior. Option activity as of March 31, 2018 and changes during the three months ended March 31, 2018 were as follows: Shares Weighted Average Options outstanding at December 30, 2017 2,925,861 $ 7.62 Options granted 106,375 $ 6.30 Options cancelled and forfeited (339,812 ) $ 9.84 Options exercised (244,889 ) $ 4.92 Options outstanding at March 31, 2018 2,447,535 $ 7.52 Options exercisable at March 31, 2018 1,643,807 $ 7.08 Intevac issued 216,988 shares under the ESPP during the three months ended March 31, 2018. Intevac estimated the weighted-average fair value of stock options and employee stock purchase rights using the following weighted-average assumptions: Three Months Ended March 31, 2018 April 1, 2017 Stock Options: Weighted-average fair value of grants per share $ 2.30 $ 4.56 Expected volatility 41.97 % 41.78 % Risk free interest rate 2.48 % 1.38 % Expected term of options (in years) 4.23 2.54 Dividend yield None None Stock Purchase Rights: Weighted-average fair value of grants per share $ 2.36 $ 2.74 Expected volatility 46.60 % 40.66 % Risk free interest rate 1.82 % 1.14 % Expected term of purchase rights (in years) 1.25 0.74 Dividend yield None None The computation of the expected volatility assumptions used in the Black-Scholes calculations for new stock option grants and ESPP purchase rights is based on the historical volatility of Intevac’s stock price, measured over a period equal to the expected term of the stock option grant or purchase right. The risk-free interest rate is based on the yield available on U.S. Treasury Strips with an equivalent remaining term. The expected term of employee stock options represents the weighted-average period that the stock options are expected to remain outstanding and was determined based on historical experience of similar awards, giving consideration to the contractual terms of the equity-based awards and vesting schedules. The expected term of purchase rights represents the period of time remaining in the current offering period. The dividend yield assumption is based on Intevac’s history of not paying dividends and the assumption of not paying dividends in the future. RSUs A summary of the RSU activity is as follows: Shares Weighted Average Grant Date Fair Value Non-vested 769,451 $ 7.84 Granted 40,188 $ 6.30 Vested (140,716 ) $ 9.44 Cancelled and forfeited (46,945 ) $ 7.77 Non-vested 621,978 $ 7.39 Time-based RSUs are converted into shares of Intevac common stock upon vesting on a one-for-one In fiscal 2016, the annual bonus for certain participants in the Company’s annual incentive plan was settled with RSUs with one-year one-year

Purchased Intangible Assets

Purchased Intangible Assets	3 Months Ended
	Mar. 31, 2018
Purchased Intangible Assets	6. Purchased Intangible Assets Details of finite-lived intangible assets by segment as of March 31, 2018, are as follows. March 31, 2018 Gross Accumulated Net (In thousands) TFE $ 7,172 $ (5,934 ) $ 1,238 Photonics 1,215 (1,104 ) 111 $ 8,387 $ (7,038 ) $ 1,349 Total amortization expense of finite-lived intangibles for the three months ended March 31, 2018 was $154,000. As of March 31, 2018, future amortization expense is expected to be as follows. (In thousands) 2018 $ 461 2019 615 2020 273 $ 1,349

Acquisition-Related Contingent

Acquisition-Related Contingent Consideration	3 Months Ended
	Mar. 31, 2018
Acquisition-Related Contingent Consideration	7. Acquisition-Related Contingent Consideration In connection with the acquisition of Solar Implant Technologies, Inc. (“SIT”), Intevac agreed to pay to the selling shareholders a revenue earnout in cash on Intevac’s net revenue from commercial sales of certain products over a specified period, up to an aggregate of $9.0 million. Intevac estimated the fair value of this contingent consideration on March 31, 2018 based on forecasted revenues reflecting Intevac’s own assumptions concerning future revenue from such products. The fair value measurement of contingent consideration is based on significant inputs not observed in the market and thus represents a Level 3 measurement. Any change in fair value of the contingent consideration subsequent to the acquisition date is recognized in operating income within the condensed consolidated statements of operations. The following table represents a reconciliation of the change in the fair value measurement of the contingent consideration liability for the three-month periods ended March 31, 2018 and April 1, 2017: Three Months Ended March 31, April 1, (In thousands) Opening balance $ 362 $ 759 Changes in fair value (1 ) 80 Cash payments made — (2 ) Closing balance $ 361 $ 837 The following table displays the balance sheet classification of the contingent consideration liability account at March 31, 2018 and at December 30, 2017: March 31, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 221 $ 103 Other long-term liabilities 140 259 Total acquisition-related contingent consideration $ 361 $ 362 The following table represents the quantitative range of the significant unobservable inputs used in the calculation of fair value of the contingent consideration liability as of March 31, 2018. Significant increases or decreases in any of these inputs in isolation would result in a significantly lower (higher) fair value measurement. Quantitative Information about Level 3 Fair Value Measurements at March 31, 2018 Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (In thousands, except for percentages) Revenue Earnout $ 361 Discounted cash flow Weighted average cost of capital 12.1 %

Warranty

Warranty	3 Months Ended
	Mar. 31, 2018
Warranty	8. Warranty Intevac provides for the estimated cost of warranty when revenue is recognized. Intevac’s warranty is per contract terms and for its HDD manufacturing, DCP manufacturing and solar cell manufacturing the warranty typically ranges between 12 and 24 months from customer acceptance. During this warranty period any defective non-consumable On the condensed consolidated balance sheets, the short-term portion of the warranty provision is included in other accrued liabilities, while the long-term portion is included in other long-term liabilities. The expense associated with product warranties issued or adjusted is included in cost of net revenues on the condensed consolidated statements of operations. The following table displays the activity in the warranty provision account for the three-month periods ended March 31, 2018 and April 1, 2017: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Opening balance $ 994 $ 1,007 Expenditures incurred under warranties (236 ) (142 ) Accruals for product warranties issued during the reporting period 104 250 Adjustments to previously existing warranty accruals 4 (9 ) Closing balance $ 866 $ 1,106 The following table displays the balance sheet classification of the warranty provision account at March 31, 2018 and at December 30, 2017: March 31, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 646 $ 757 Other long-term liabilities 220 237 Total warranty provision $ 866 $ 994

Guarantees

Guarantees	3 Months Ended
	Mar. 31, 2018
Guarantees	9. Guarantees Officer and Director Indemnifications As permitted or required under Delaware law and to the maximum extent allowable under that law, Intevac has certain obligations to indemnify its current and former officers and directors for certain events or occurrences while the officer or director is, or was, serving at Intevac’s request in such capacity. These indemnification obligations are valid as long as the director or officer acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the Company and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. The maximum potential amount of future payments Intevac could be required to make under these indemnification obligations is unlimited; however, Intevac has a director and officer insurance policy that mitigates Intevac’s exposure and enables Intevac to recover a portion of any future amounts paid. As a result of Intevac’s insurance policy coverage, Intevac believes the estimated fair value of these indemnification obligations is not material. Other Indemnifications As is customary in Intevac’s industry, many of Intevac’s contracts provide remedies to certain third parties such as defense, settlement, or payment of judgments for intellectual property claims related to the use of its products. Such indemnification obligations may not be subject to maximum loss clauses. Historically, payments made related to these indemnifications have been immaterial. Letters of Credit As of March 31, 2018, we had letters of credit and bank guarantees outstanding totaling $1.0 million, including the standby letter of credit outstanding under the Santa Clara, California facility lease and various other guarantees with our bank. These letters of credit and bank guarantees are collateralized by $1.0 million of restricted cash.

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	3 Months Ended
	Mar. 31, 2018
Cash, Cash Equivalents and Investments	10. Cash, Cash Equivalents and Investments Cash and cash equivalents, short-term investments and long-term investments consist of: March 31, 2018 Amortized Unrealized Unrealized Fair Value (In thousands) Cash and cash equivalents: Cash $ 10,284 $ — $ — $ 10,284 Money market funds 5,522 — — 5,522 Commercial paper 500 — — 500 Total cash and cash equivalents $ 16,306 $ — $ — $ 16,306 Short-term investments: Certificates of deposit $ 4,150 $ — $ 4 $ 4,146 Commercial paper 3,090 — — 3,090 Corporate bonds and medium-term notes 5,964 — 25 5,939 Municipal bonds 500 — 2 498 U.S. treasury and agency securities 5,431 — 11 5,420 Total short-term investments $ 19,135 $ — $ 42 $ 19,093 Long-term investments: Corporate bonds and medium-term notes $ 2,311 $ — $ 17 $ 2,294 U.S. treasury and agency securities 1,997 — 14 1,983 Total long-term investments $ 4,308 $ — $ 31 $ 4,277 Total cash, cash equivalents, and investments $ 39,749 $ — $ 73 $ 39,676 December 30, 2017 Amortized Unrealized Unrealized Fair Value (In thousands) Cash and cash equivalents: Cash $ 13,195 $ — $ — $ 13,195 Money market funds 6,746 — — 6,746 Total cash and cash equivalents $ 19,941 $ — $ — $ 19,941 Short-term investments: Certificates of deposit $ 2,500 $ 1 $ 1 $ 2,500 Commercial paper 3,291 — — 3,291 Corporate bonds and medium-term notes 4,502 — 5 4,497 Municipal bonds 500 — 3 497 U.S. treasury and agency securities 4,917 — 4 4,913 Total short-term investments $ 15,710 $ 1 $ 13 $ 15,698 Long-term investments: Asset backed securities $ 500 $ — $ — $ 500 Corporate bonds and medium-term notes 4,384 — 21 4,363 U.S. treasury and agency securities 1,998 — 12 1,986 Total long-term investments $ 6,882 $ — $ 33 $ 6,849 Total cash, cash equivalents, and investments $ 42,533 $ 1 $ 46 $ 42,488 The following table provides the fair market value of Intevac’s investments with unrealized losses that are not deemed to be other-than temporarily impaired as of March 31, 2018. March 31, 2018 In Loss Position for Less than 12 Months In Loss Position for Greater than 12 Months Fair Value Gross Unrealized Fair Value Gross Unrealized (In thousands) Certificates of deposit $ 4,146 $ 4 $ — $ — Corporate bonds and medium-term notes 6,838 36 999 5 Municipal bonds — — 498 2 U.S. treasury and agency securities 6,908 26 — — $ 17,892 $ 66 $ 1,497 $ 7 The contractual maturities of available-for-sale Amortized Fair Value (In thousands) Due in one year or less $ 25,157 $ 25,115 Due after one through two years 4,308 4,277 $ 29,465 $ 29,392 All prices for the fixed maturity securities including U.S. treasury and agency securities, certificates of deposit, commercial paper, corporate bonds, asset backed securities and municipal bonds are received from independent pricing services utilized by Intevac’s outside investment manager. This investment manager performs a review of the pricing methodologies and inputs utilized by the independent pricing services for each asset type priced by the vendor. In addition, on at least an annual basis, the investment manager conducts due diligence visits and interviews with each pricing vendor to verify the inputs utilized for each asset class. The due diligence visits include a review of the procedures performed by each vendor to ensure that pricing evaluations are representative of the price that would be received to sell a security in an orderly transaction. Any pricing where the input is based solely on a broker price is deemed to be a Level 3 price. Intevac uses the pricing data obtained from its outside investment manager as the primary input to make its assessments and determinations as to the ultimate valuation of the above-mentioned securities and has not made, during the periods presented, any material adjustments to such inputs. The following table represents the fair value hierarchy of Intevac’s available-for-sale Fair Value Measurements at March 31, 2018 Total Level 1 Level 2 (In thousands) Recurring fair value measurements: Available-for-sale Money market funds $ 5,522 $ 5,522 $ — U.S. treasury and agency securities 7,403 5,381 2,022 Certificates of deposit 4,146 — 4,146 Commercial paper 3,590 — 3,590 Corporate bonds and medium-term notes 8,233 — 8,233 Municipal bonds 498 — 498 Total recurring fair value measurements $ 29,392 $ 10,903 $ 18,489

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments	11. Derivative Instruments The Company uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement re-measurement The following table summarizes the Company’s outstanding derivative instruments on a gross basis as recorded in its condensed consolidated balance sheets as of March 31, 2018 and December 30, 2017: Notional Amounts Derivative Liabilities Derivative Instrument March 31, December 30, March 31, December 30, Balance Sheet Line Fair Value Balance Sheet Line Fair Value (In thousands) Undesignated Hedges: Forward Foreign Currency Contracts $ 873 $ 1,276 (a) $ 5 (a) $ 5 Total Hedges $ 873 $ 1,276 $ 5 $ 5 (a) Other accrued liabilities

Equity

Equity	3 Months Ended
	Mar. 31, 2018
Equity	12. Equity Stock Repurchase Program On November 21, 2013, Intevac’s Board of Directors approved a stock repurchase program authorizing up to $30.0 million in repurchases. At March 31, 2018, $1.5 million remains available for future stock repurchases under the repurchase program. Intevac did not make any stock repurchases during the three months ended March 31, 2018 and April 1, 2017, respectively. Intevac records treasury stock purchases under the cost method using the first-in, first-out paid-in paid-in Accumulated Other Comprehensive Income The changes in accumulated other comprehensive income by component for the three months ended March 31, 2018 and April 1, 2017, are as follows. Three Months Ended Three Months Ended March 31, 2018 April 1, 2017 Foreign Unrealized available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 535 $ (45 ) $ 490 $ 343 $ (22 ) $ 321 Other comprehensive income before reclassification 104 (28 ) 76 34 4 38 Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income 104 (28 ) 76 34 4 38 Ending balance $ 639 $ (73 ) $ 566 $ 377 $ (18 ) $ 359

Net Income (Loss) Per Share

Net Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2018
Net Income (Loss) Per Share	13. Net Income (Loss) Per Share The following table sets forth the computation of basic and diluted net income (loss) per share: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Net income (loss) $ (5,136 ) $ 1,829 Weighted-average shares – basic 22,107 21,216 Effect of dilutive potential common shares — 1,574 Weighted-average shares – diluted 22,107 22,790 Net income (loss) per share – basic $ (0.23 ) $ 0.09 Net income (loss) per share – diluted $ (0.23 ) $ 0.08 The following potentially dilutive securities were excluded (as common stock equivalents) from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive: March 31, April 1, 2018 2017 (In thousands) Stock options to purchase common stock 2,448 452 RSUs 622 — Employee stock purchase plan 673 —

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2018
Segment Reporting	14. Segment Reporting Intevac’s two reportable segments are: TFE and Photonics. Intevac’s chief operating decision-maker has been identified as the President and CEO, who reviews operating results to make decisions about allocating resources and assessing performance for the entire Company. Segment information is presented based upon Intevac’s management organization structure as of March 31, 2018 and the distinctive nature of each segment. Future changes to this internal financial structure may result in changes to the reportable segments disclosed. Each reportable segment is separately managed and has separate financial results that are reviewed by Intevac’s chief operating decision-maker. Each reportable segment contains closely related products that are unique to the particular segment. Segment operating profit is determined based upon internal performance measures used by the chief operating decision-maker. Intevac derives the segment results from its internal management reporting system. The accounting policies Intevac uses to derive reportable segment results are substantially the same as those used for external reporting purposes. Management measures the performance of each reportable segment based upon several metrics, including orders, net revenues and operating income. Management uses these results to evaluate the performance of, and to assign resources to, each of the reportable segments. Intevac manages certain operating expenses separately at the corporate level. Intevac allocates certain of these corporate expenses to the segments in an amount equal to 3% of net revenues. Segment operating income excludes interest income/expense and other financial charges and income taxes according to how a particular reportable segment’s management is measured. Management does not consider impairment charges, gains and losses on divestitures and sales of intellectual property, and unallocated costs in measuring the performance of the reportable segments. The TFE segment designs, develops and markets vacuum process equipment solutions for high-volume manufacturing of small substrates with precise thin-film properties, such as for the hard drive, solar cell and DCP industries, as well as other adjacent thin-film markets. The Photonics segment develops compact, cost-effective, high-sensitivity digital-optical products for the capture and display of low-light Information for each reportable segment for the three months ended March 31, 2018 and April 1, 2017 is as follows: Net Revenues Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE $ 12,789 $ 21,484 Photonics 5,185 8,904 Total segment net revenues $ 17,974 $ 30,388 Operating Income (Loss) Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE $ (2,509 ) $ 1,859 Photonics (1,210 ) 1,465 Total segment operating profit (loss) (3,719 ) 3,324 Unallocated costs (1,402 ) (1,233 ) Income (loss) from operations (5,121 ) 2,091 Interest income and other income (expense), net 145 110 Income (loss) before income taxes $ (4,976 ) $ 2,201 Total assets for each reportable segment as of March 31, 2018 and December 30, 2017 are as follows: Assets March 31, 2018 December 30, 2017 (In thousands) TFE $ 52,055 $ 52,156 Photonics 15,733 16,364 Total segment assets 67,788 68,520 Cash, cash equivalents and investments 39,676 42,488 Restricted cash 1,000 1,000 Deferred income taxes 4 4 Other current assets 1,018 1,001 Common property, plant and equipment 1,122 1,267 Other assets 762 743 Consolidated total assets $ 111,370 $ 115,023

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Taxes	15. Income Taxes Intevac recorded income tax provisions of $160,000 for the three months ended March 31, 2018 and of $372,000 for the three months ended April 1, 2017. The income tax provisions for the three month periods are based upon estimates of annual income (loss), annual permanent differences and statutory tax rates in the various jurisdictions in which Intevac operates. For the three-month period ended March 31, 2018 Intevac utilized net operating loss carry-forwards to offset the impact of the global intangible low-taxed Tax Reform was enacted on December 22, 2017. Tax Reform reduces the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time one-time Additionally, Tax Reform subjects a U.S. shareholder to tax on GILTI earned by certain foreign subsidiaries for tax years starting on or after January 1, 2018. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed The Company historically asserted its intent to reinvest substantially all of its foreign earnings in foreign operations indefinitely. The Company is still in the process of analyzing the impact that Tax Reform has on its indefinite reinvestment assertion. Accordingly, no additional income taxes or withholding taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax, or any outside basis difference inherent in these entities. The Inland Revenue Authority of Singapore (“IRAS”) is currently conducting a review of the fiscal 2009 through 2012 tax returns of the Company’s wholly-owned subsidiary, Intevac Asia Pte. Ltd. IRAS has challenged the Company’s tax position with respect to certain aspects of the Company’s transfer pricing. Under Singapore tax law, the Company must pay all contested taxes and the related interest to have the right to defend its position. The contested tax deposits of $762,000 at March 31, 2018 and $743,000 at December 30, 2017 are included in other long-term assets on the condensed consolidated balance sheets. The Company’s management and its advisors continue to believe that the Company is “more likely than not” to successfully defend that the tax treatment was proper and in accordance with Singapore tax regulations. Presently, there are no other active income tax examinations in the jurisdictions where Intevac operates.

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2018
Restructuring Charges	16. Restructuring Charges During the first quarter of fiscal 2018, Intevac substantially completed implementation of the 2018 cost reduction plan (the “Plan”), which was intended to reduce expenses and reduce its workforce by 6 percent. The cost of implementing the Plan was reported under cost of net revenues and operating expenses in the condensed consolidated statements of operations. Substantially all cash outlays in connection with the Plan occurred in the first quarter of fiscal 2018. Implementation of the Plan is expected to reduce salary, wages and other employee-related expenses by approximately $1.8 million on an annual basis. The changes in restructuring reserves associated with the Plan for the three months ended March 31, 2018 are as follows. Three Months Ended March 31, Severance and (In thousands) Beginning balance $ — Provision for restructuring reserves 95 Cash payments made (95 ) Ending balance $ —

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies	17. Commitments and Contingencies From time to time, Intevac may have certain contingent liabilities that arise in the ordinary course of its business activities. Intevac accounts for contingent liabilities when it is probable that future expenditures will be made and such expenditures can be reasonably estimated.

Recent Accounting Pronounceme24

Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2018
Recently Issued Accounting Standard Not Yet Adopted	Recently Issued Accounting Standard Not Yet Adopted In February 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2018-02, 2018-02 ASU 2018-02
Adoption of New Accounting Standard	Adoption of New Accounting Standard ASU 2014-09, In our TFE segment, a majority of our equipment sales revenue continues to be recognized when products are shipped from our manufacturing facilities. Revenue recognition for our equipment sales arrangements, which includes systems, technology upgrades, service and spare parts, remains materially consistent with our historical practice. Under the new revenue standard, in our TFE segment, we recognize revenue for equipment sales at a point in time following the transfer of control of such products to the customer, which typically occurs upon shipment or delivery depending on the terms of the underlying contracts. Our contracts with customers may include multiple performance obligations. For such arrangements, under the new revenue standard we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling prices based on the prices charged to customers or using expected cost plus margin. Under the new revenue standard, the expected costs associated with our base warranties continue to be recognized as expense when the equipment is sold. Under the new revenue standard, in our Photonics segment, we recognize revenue for cost plus fixed fee (“CPFF”) and firm fixed priced (“FFP”) government contracts over time under the cost-to-cost non-U.S. cost-to-cost The majority of our contracts in our Photonics segment have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product lifecycle (development and production). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Under the new revenue standard, in our Photonics segment, we recognize revenue for homogenous manufactured military products sold to the U.S. government and its contractors over time under the units-of-delivery units-of-delivery The nature of our contracts in our Photonics segment gives rise to several types of variable consideration including tiered pricing. Allocation of contract revenues among Photonics military products, and the timing of the recognition of those revenues, is impacted by agreements with tiered pricing or variable rate structures. We include variable consideration in the estimated transaction price when there is a basis to reasonably estimate the amount of the consideration. These estimates are based on historical experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. Accounting for CPFF and FFP contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For these contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events. These assumptions include the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up We recorded a cumulative effect adjustment to the beginning balance of our consolidated December 31, 2017 balance sheet for the impact of the allocation and the timing of the recognition of revenues for an open Photonics military product agreement with a tiered pricing structure. This change will also result in increased revenue in subsequent periods from this agreement. The cumulative effect of the changes made to our consolidated December 31, 2017 balance sheet for the adoption of the new revenue standard were as follows (in thousands): Balance at December 30, Adjustments Due to ASC 606 Balance at December 31, Other accrued liabilities $ 7,688 $ 1,634 $ 9,322 Accumulated deficit $ (66,881 ) $ (1,634 ) $ (68,515 ) In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statement of operations was as follows (in thousands): Consolidated Statement of Operations For the Three Months Ended March 31, 2018 As Reported Balances ASC 606 Effect of Net revenues: Systems and components $ 15,472 $ 15,343 $ 129 Technology development 2,502 2,502 — Total net revenues 17,974 17,845 129 Cost of net revenues: Systems and components 10,728 10,728 — Technology development 2,371 2,371 — Total cost of net revenues 13,099 13,099 — Gross profit 4,875 4,746 129 Operating expenses: Research and development 4,167 4,167 — Selling, general and administrative 5,829 5,829 — Total operating expenses 9,996 9,996 — Loss from operations (5,121 ) (5,250 ) 129 Interest income and other income (expense), net 145 145 — Loss before income taxes (4,976 ) (5,105 ) 129 Provision for income taxes 160 160 — Net loss $ (5,136 ) $ (5,265 ) $ 129 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select consolidated balance sheet line items was as follows (in thousands): Consolidated Balance Sheet As of March 31, 2018 As Balances without ASC 606 Effect of Other accrued liabilities $ 9,845 $ 8,340 $ 1,505 Total current liabilities $ 30,128 $ 28,623 $ 1,505 Accumulated deficit $ (73,651 ) $ (72,146 ) $ (1,505 ) Total stockholders’ equity $ 78,518 $ 80,023 $ (1,505 )

Recent Accounting Pronounceme25

Recent Accounting Pronouncements (Tables)	3 Months Ended
	Mar. 31, 2018
Effect of Changes in Financial Statements Due to Adoption of New Revenue Standard	The cumulative effect of the changes made to our consolidated December 31, 2017 balance sheet for the adoption of the new revenue standard were as follows (in thousands): Balance at December 30, Adjustments Due to ASC 606 Balance at December 31, Other accrued liabilities $ 7,688 $ 1,634 $ 9,322 Accumulated deficit $ (66,881 ) $ (1,634 ) $ (68,515 ) In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statement of operations was as follows (in thousands): Consolidated Statement of Operations For the Three Months Ended March 31, 2018 As Reported Balances ASC 606 Effect of Net revenues: Systems and components $ 15,472 $ 15,343 $ 129 Technology development 2,502 2,502 — Total net revenues 17,974 17,845 129 Cost of net revenues: Systems and components 10,728 10,728 — Technology development 2,371 2,371 — Total cost of net revenues 13,099 13,099 — Gross profit 4,875 4,746 129 Operating expenses: Research and development 4,167 4,167 — Selling, general and administrative 5,829 5,829 — Total operating expenses 9,996 9,996 — Loss from operations (5,121 ) (5,250 ) 129 Interest income and other income (expense), net 145 145 — Loss before income taxes (4,976 ) (5,105 ) 129 Provision for income taxes 160 160 — Net loss $ (5,136 ) $ (5,265 ) $ 129 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select consolidated balance sheet line items was as follows (in thousands): Consolidated Balance Sheet As of March 31, 2018 As Balances without ASC 606 Effect of Other accrued liabilities $ 9,845 $ 8,340 $ 1,505 Total current liabilities $ 30,128 $ 28,623 $ 1,505 Accumulated deficit $ (73,651 ) $ (72,146 ) $ (1,505 ) Total stockholders’ equity $ 78,518 $ 80,023 $ (1,505 )

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2018
Disaggregation of Revenue from Contracts with Customers	The following tables represent a disaggregation of revenue from contracts with customers for the three months ended March 31, 2018 and April 1, 2017 along with the reportable segment for each category. As noted above the prior period amounts have not been adjusted under the modified retrospective method. Major Products and Service Lines TFE Three Months Ended March 31, 2018 Three Months Ended April 1, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 10,393 $ 1 $ 2 $ 10,396 $ 7,281 $ 12,787 $ — $ 20,068 Field service 2,355 — 38 2,393 1,408 — 8 1,416 Total TFE net revenues $ 12,748 $ 1 $ 40 $ 12,789 $ 8,689 $ 12,787 $ 8 $ 21,484 Three Months Ended Photonics March 31,2018 April 1,2017 (In thousands) Products: Military products $ 2,254 $ 6,705 Commercial products — 46 Repair and other services 429 188 Total Photonics product net revenues 2,683 6,939 Technology development: FFP 692 1,084 CPFF 1,790 881 Time and materials 20 — Total technology development net revenues 2,502 1,965 Total Photonics net revenues $ 5,185 $ 8,904 Primary Geographical Markets Three Months Ended Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 1,911 $ 4,762 $ 6,673 $ 613 $ 8,589 $ 9,202 Asia 10,878 — 10,878 20,871 — 20,871 Europe — 293 293 — 315 315 Rest of World — 130 130 — — — Total net revenues $ 12,789 $ 5,185 $ 17,974 $ 21,484 $ 8,904 $ 30,388 Timing of Revenue Recognition Three Months Ended March 31, 2018 TFE Photonics Total (In thousands) Products transferred at a point in time $ 12,789 $ 429 $ 13,218 Products and services transferred over time — 4,756 4,756 $ 12,789 $ 5,185 $ 17,974
Changes in Contract Assets and Contract Liabilities	The following table reflects the changes in our contract assets, which we classify as accounts receivable, unbilled or retainage and our contract liabilities which we classify as deferred revenue and customer advances for the three months ended March 31, 2018: March 31, 2018 December 30, 2017 Three Months Change (In thousands) TFE: Contract assets: Accounts receivable, unbilled $ 854 $ 1,368 $ (514 ) Contract liabilities: Deferred revenue $ 5,319 $ 5,190 $ 129 Customer advances 11,092 10,204 888 $ 16,411 $ 15,394 $ 1,017 Photonics: Contract assets: Accounts receivable, unbilled $ 1,692 $ 1,346 $ 346 Retainage 288 281 7 $ 1,980 $ 1,627 $ 353 Contract liabilities: Deferred revenue $ 1,602 $ 97 $ 1,505 Customer advances 616 822 (206 ) $ 2,218 $ 919 $ 1,299

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2018
Summary of Inventories	Inventories are stated at the lower of average cost or market and consist of the following: March 31, December 30, 2018 2017 (In thousands) Raw materials $ 15,458 $ 19,881 Work-in-progress 15,622 9,433 Finished goods 4,493 4,478 $ 35,573 $ 33,792

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Effect of Recording Equity-Based Compensation	The effect of recording equity-based compensation for the three-month periods ended March 31, 2018 and April 1, 2017 was as follows: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Equity-based compensation by type of award: Stock options $ 134 $ 255 RSUs 406 718 Employee stock purchase plan 277 104 Total equity-based compensation $ 817 $ 1,077
Option Activity and Changes	Option activity as of March 31, 2018 and changes during the three months ended March 31, 2018 were as follows: Shares Weighted Average Options outstanding at December 30, 2017 2,925,861 $ 7.62 Options granted 106,375 $ 6.30 Options cancelled and forfeited (339,812 ) $ 9.84 Options exercised (244,889 ) $ 4.92 Options outstanding at March 31, 2018 2,447,535 $ 7.52 Options exercisable at March 31, 2018 1,643,807 $ 7.08
Employee Stock Options Weighted-Average Assumptions	Intevac estimated the weighted-average fair value of stock options and employee stock purchase rights using the following weighted-average assumptions: Three Months Ended March 31, 2018 April 1, 2017 Stock Options: Weighted-average fair value of grants per share $ 2.30 $ 4.56 Expected volatility 41.97 % 41.78 % Risk free interest rate 2.48 % 1.38 % Expected term of options (in years) 4.23 2.54 Dividend yield None None Stock Purchase Rights: Weighted-average fair value of grants per share $ 2.36 $ 2.74 Expected volatility 46.60 % 40.66 % Risk free interest rate 1.82 % 1.14 % Expected term of purchase rights (in years) 1.25 0.74 Dividend yield None None
Summary of Restricted Stock Units Activity	A summary of the RSU activity is as follows: Shares Weighted Average Grant Date Fair Value Non-vested 769,451 $ 7.84 Granted 40,188 $ 6.30 Vested (140,716 ) $ 9.44 Cancelled and forfeited (46,945 ) $ 7.77 Non-vested 621,978 $ 7.39

Purchased Intangible Assets (Ta

Purchased Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Details of Finite-lived Intangible Assets by Segment	Details of finite-lived intangible assets by segment as of March 31, 2018, are as follows. March 31, 2018 Gross Accumulated Net (In thousands) TFE $ 7,172 $ (5,934 ) $ 1,238 Photonics 1,215 (1,104 ) 111 $ 8,387 $ (7,038 ) $ 1,349
Future Amortization Expense	As of March 31, 2018, future amortization expense is expected to be as follows. (In thousands) 2018 $ 461 2019 615 2020 273 $ 1,349

Acquisition-Related Contingen30

Acquisition-Related Contingent Consideration (Tables)	3 Months Ended
	Mar. 31, 2018
Reconciliation of Change in Fair Value Measurement of Contingent Consideration Liability	The following table represents a reconciliation of the change in the fair value measurement of the contingent consideration liability for the three-month periods ended March 31, 2018 and April 1, 2017: Three Months Ended March 31, April 1, (In thousands) Opening balance $ 362 $ 759 Changes in fair value (1 ) 80 Cash payments made — (2 ) Closing balance $ 361 $ 837
Balance Sheet Classification of Contingent Consideration Liability	The following table displays the balance sheet classification of the contingent consideration liability account at March 31, 2018 and at December 30, 2017: March 31, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 221 $ 103 Other long-term liabilities 140 259 Total acquisition-related contingent consideration $ 361 $ 362
Quantitative Information of Significant Unobservable Inputs of Contingent Consideration Liability	The following table represents the quantitative range of the significant unobservable inputs used in the calculation of fair value of the contingent consideration liability as of March 31, 2018. Significant increases or decreases in any of these inputs in isolation would result in a significantly lower (higher) fair value measurement. Quantitative Information about Level 3 Fair Value Measurements at March 31, 2018 Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (In thousands, except for percentages) Revenue Earnout $ 361 Discounted cash flow Weighted average cost of capital 12.1 %

Warranty (Tables)

Warranty (Tables)	3 Months Ended
	Mar. 31, 2018
Activity in Warranty Provision Account	The following table displays the activity in the warranty provision account for the three-month periods ended March 31, 2018 and April 1, 2017: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Opening balance $ 994 $ 1,007 Expenditures incurred under warranties (236 ) (142 ) Accruals for product warranties issued during the reporting period 104 250 Adjustments to previously existing warranty accruals 4 (9 ) Closing balance $ 866 $ 1,106 The following table displays the balance sheet classification of the warranty provision account at March 31, 2018 and at December 30, 2017: March 31, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 646 $ 757 Other long-term liabilities 220 237 Total warranty provision $ 866 $ 994

Cash, Cash Equivalents and In32

Cash, Cash Equivalents and Investments (Tables)	3 Months Ended
	Mar. 31, 2018
Cash, Cash Equivalents and Short-Term Investments and Long-Term Investments	Cash and cash equivalents, short-term investments and long-term investments consist of: March 31, 2018 Amortized Unrealized Unrealized Fair Value (In thousands) Cash and cash equivalents: Cash $ 10,284 $ — $ — $ 10,284 Money market funds 5,522 — — 5,522 Commercial paper 500 — — 500 Total cash and cash equivalents $ 16,306 $ — $ — $ 16,306 Short-term investments: Certificates of deposit $ 4,150 $ — $ 4 $ 4,146 Commercial paper 3,090 — — 3,090 Corporate bonds and medium-term notes 5,964 — 25 5,939 Municipal bonds 500 — 2 498 U.S. treasury and agency securities 5,431 — 11 5,420 Total short-term investments $ 19,135 $ — $ 42 $ 19,093 Long-term investments: Corporate bonds and medium-term notes $ 2,311 $ — $ 17 $ 2,294 U.S. treasury and agency securities 1,997 — 14 1,983 Total long-term investments $ 4,308 $ — $ 31 $ 4,277 Total cash, cash equivalents, and investments $ 39,749 $ — $ 73 $ 39,676 December 30, 2017 Amortized Unrealized Unrealized Fair Value (In thousands) Cash and cash equivalents: Cash $ 13,195 $ — $ — $ 13,195 Money market funds 6,746 — — 6,746 Total cash and cash equivalents $ 19,941 $ — $ — $ 19,941 Short-term investments: Certificates of deposit $ 2,500 $ 1 $ 1 $ 2,500 Commercial paper 3,291 — — 3,291 Corporate bonds and medium-term notes 4,502 — 5 4,497 Municipal bonds 500 — 3 497 U.S. treasury and agency securities 4,917 — 4 4,913 Total short-term investments $ 15,710 $ 1 $ 13 $ 15,698 Long-term investments: Asset backed securities $ 500 $ — $ — $ 500 Corporate bonds and medium-term notes 4,384 — 21 4,363 U.S. treasury and agency securities 1,998 — 12 1,986 Total long-term investments $ 6,882 $ — $ 33 $ 6,849 Total cash, cash equivalents, and investments $ 42,533 $ 1 $ 46 $ 42,488
Fair Market Value of Investments with Unrealized Losses Not Deemed to be Other-Than Temporarily Impaired	The following table provides the fair market value of Intevac’s investments with unrealized losses that are not deemed to be other-than temporarily impaired as of March 31, 2018. March 31, 2018 In Loss Position for Less than 12 Months In Loss Position for Greater than 12 Months Fair Value Gross Unrealized Fair Value Gross Unrealized (In thousands) Certificates of deposit $ 4,146 $ 4 $ — $ — Corporate bonds and medium-term notes 6,838 36 999 5 Municipal bonds — — 498 2 U.S. treasury and agency securities 6,908 26 — — $ 17,892 $ 66 $ 1,497 $ 7
Contractual Maturities of Available-for-Sale Securities	The contractual maturities of available-for-sale Amortized Fair Value (In thousands) Due in one year or less $ 25,157 $ 25,115 Due after one through two years 4,308 4,277 $ 29,465 $ 29,392
Fair Value Hierarchy of Available-for-Sale Securities Measured at Fair Value on Recurring Basis	The following table represents the fair value hierarchy of Intevac’s available-for-sale Fair Value Measurements at March 31, 2018 Total Level 1 Level 2 (In thousands) Recurring fair value measurements: Available-for-sale Money market funds $ 5,522 $ 5,522 $ — U.S. treasury and agency securities 7,403 5,381 2,022 Certificates of deposit 4,146 — 4,146 Commercial paper 3,590 — 3,590 Corporate bonds and medium-term notes 8,233 — 8,233 Municipal bonds 498 — 498 Total recurring fair value measurements $ 29,392 $ 10,903 $ 18,489

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Summary of Outstanding Derivative Instruments on Gross Basis as Recorded in Consolidated Balance Sheets	The following table summarizes the Company’s outstanding derivative instruments on a gross basis as recorded in its condensed consolidated balance sheets as of March 31, 2018 and December 30, 2017: Notional Amounts Derivative Liabilities Derivative Instrument March 31, December 30, March 31, December 30, Balance Sheet Line Fair Value Balance Sheet Line Fair Value (In thousands) Undesignated Hedges: Forward Foreign Currency Contracts $ 873 $ 1,276 (a) $ 5 (a) $ 5 Total Hedges $ 873 $ 1,276 $ 5 $ 5 (a) Other accrued liabilities

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Changes in Accumulated Other Comprehensive Income by Component	The changes in accumulated other comprehensive income by component for the three months ended March 31, 2018 and April 1, 2017, are as follows. Three Months Ended Three Months Ended March 31, 2018 April 1, 2017 Foreign Unrealized available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 535 $ (45 ) $ 490 $ 343 $ (22 ) $ 321 Other comprehensive income before reclassification 104 (28 ) 76 34 4 38 Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income 104 (28 ) 76 34 4 38 Ending balance $ 639 $ (73 ) $ 566 $ 377 $ (18 ) $ 359

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Computation of Basic and Diluted Net Income (Loss) Per Share	The following table sets forth the computation of basic and diluted net income (loss) per share: Three Months Ended March 31, 2018 April 1, 2017 (In thousands) Net income (loss) $ (5,136 ) $ 1,829 Weighted-average shares – basic 22,107 21,216 Effect of dilutive potential common shares — 1,574 Weighted-average shares – diluted 22,107 22,790 Net income (loss) per share – basic $ (0.23 ) $ 0.09 Net income (loss) per share – diluted $ (0.23 ) $ 0.08
Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Share	The following potentially dilutive securities were excluded (as common stock equivalents) from the computation of diluted net income (loss) per share for the periods presented as their effect would have been antidilutive: March 31, April 1, 2018 2017 (In thousands) Stock options to purchase common stock 2,448 452 RSUs 622 — Employee stock purchase plan 673 —

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2018
Information for Each Reportable Segment	Information for each reportable segment for the three months ended March 31, 2018 and April 1, 2017 is as follows: Net Revenues Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE $ 12,789 $ 21,484 Photonics 5,185 8,904 Total segment net revenues $ 17,974 $ 30,388 Operating Income (Loss) Three Months Ended March 31, 2018 April 1, 2017 (In thousands) TFE $ (2,509 ) $ 1,859 Photonics (1,210 ) 1,465 Total segment operating profit (loss) (3,719 ) 3,324 Unallocated costs (1,402 ) (1,233 ) Income (loss) from operations (5,121 ) 2,091 Interest income and other income (expense), net 145 110 Income (loss) before income taxes $ (4,976 ) $ 2,201
Assets for Each Reportable Segment	Total assets for each reportable segment as of March 31, 2018 and December 30, 2017 are as follows: Assets March 31, 2018 December 30, 2017 (In thousands) TFE $ 52,055 $ 52,156 Photonics 15,733 16,364 Total segment assets 67,788 68,520 Cash, cash equivalents and investments 39,676 42,488 Restricted cash 1,000 1,000 Deferred income taxes 4 4 Other current assets 1,018 1,001 Common property, plant and equipment 1,122 1,267 Other assets 762 743 Consolidated total assets $ 111,370 $ 115,023

Restructuring Charges (Tables)

Restructuring Charges (Tables)	3 Months Ended
	Mar. 31, 2018
Changes in Restructuring Reserves	The changes in restructuring reserves associated with the Plan for the three months ended March 31, 2018 are as follows. Three Months Ended March 31, Severance and (In thousands) Beginning balance $ — Provision for restructuring reserves 95 Cash payments made (95 ) Ending balance $ —

Description of Business and B38

Description of Business and Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018Segment
Description Of Business And Basis Of Presentation [Line Items]
Number of reportable segments	2

Effect of Changes in Balance Sh

Effect of Changes in Balance Sheet Due to Adoption of New Revenue Standard (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	$ 9,845		$ 7,688
Accumulated deficit	(73,651)		$ (66,881)
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	8,340	$ 9,322
Accumulated deficit	(72,146)	(68,515)
Accounting Standards Update 2014-09 | Difference Between Revenue Guidance in Effect Before and After Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	1,505	1,634
Accumulated deficit	$ (1,505)	$ (1,634)

Impact of adoption of New Reven

Impact of adoption of New Revenue Standard on Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net revenues:
Systems and components	$ 15,472	$ 28,423
Technology development	2,502	1,965
Total net revenues	17,974	30,388
Cost of net revenues:
Systems and components	10,728	15,674
Technology development	2,371	1,667
Total cost of net revenues	13,099	17,341
Gross profit	4,875	13,047
Operating expenses:
Research and development	4,167	4,682
Selling, general and administrative	5,829	6,274
Total operating expenses	9,996	10,956
Loss from operations	(5,121)	2,091
Interest income and other income (expense), net	145	110
Loss before income taxes	(4,976)	2,201
Provision for income taxes	160	372
Net loss	(5,136)	$ 1,829
Accounting Standards Update 2014-09
Net revenues:
Systems and components	15,343
Technology development	2,502
Total net revenues	17,845
Cost of net revenues:
Systems and components	10,728
Technology development	2,371
Total cost of net revenues	13,099
Gross profit	4,746
Operating expenses:
Research and development	4,167
Selling, general and administrative	5,829
Total operating expenses	9,996
Loss from operations	(5,250)
Interest income and other income (expense), net	145
Loss before income taxes	(5,105)
Provision for income taxes	160
Net loss	(5,265)
Accounting Standards Update 2014-09 | Difference Between Revenue Guidance in Effect Before and After Topic 606
Net revenues:
Systems and components	129
Total net revenues	129
Cost of net revenues:
Gross profit	129
Operating expenses:
Loss from operations	129
Loss before income taxes	129
Net loss	$ 129

Impact of New Revenue Standard

Impact of New Revenue Standard on Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 30, 2017
New Accounting Pronouncement, Early Adoption [Line Items]
Other accrued liabilities	$ 9,845		$ 7,688
Total current liabilities	30,128		29,481
Accumulated deficit	(73,651)		(66,881)
Total stockholders' equity	78,518		$ 82,663
Accounting Standards Update 2014-09
New Accounting Pronouncement, Early Adoption [Line Items]
Other accrued liabilities	8,340	$ 9,322
Total current liabilities	28,623
Accumulated deficit	(72,146)	(68,515)
Total stockholders' equity	80,023
Accounting Standards Update 2014-09 | Difference Between Revenue Guidance in Effect Before and After Topic 606
New Accounting Pronouncement, Early Adoption [Line Items]
Other accrued liabilities	1,505	1,634
Total current liabilities	1,505
Accumulated deficit	(1,505)	$ (1,634)
Total stockholders' equity	$ (1,505)

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Disaggregation of Revenue [Line Items]
Total net revenues	$ 17,974	$ 30,388
TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,789	21,484
TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	10,396	20,068
TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues	2,393	1,416
Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	5,185	8,904
HDD | TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,748	8,689
HDD | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	10,393	7,281
HDD | TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues	2,355	1,408
DCP | TFE
Disaggregation of Revenue [Line Items]
Total net revenues	1	12,787
DCP | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	1	12,787
PV | TFE
Disaggregation of Revenue [Line Items]
Total net revenues	40	8
PV | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	2
PV | TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues	38	8
Military Products | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	2,254	6,705
Commercial Products | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues		46
Repair and Other Services | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	429	188
Product | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	2,683	6,939
FFP | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	692	1,084
CPFF | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	1,790	881
Times and Materials | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	20
Technology Development | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	$ 2,502	$ 1,965

Revenue - Primary Geographical

Revenue - Primary Geographical Markets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Disaggregation of Revenue [Line Items]
Total net revenues	$ 17,974	$ 30,388
Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	13,218
Products and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total net revenues	4,756
United States
Disaggregation of Revenue [Line Items]
Total net revenues	6,673	9,202
Asia
Disaggregation of Revenue [Line Items]
Total net revenues	10,878	20,871
Europe
Disaggregation of Revenue [Line Items]
Total net revenues	293	315
Rest of World
Disaggregation of Revenue [Line Items]
Total net revenues	130
TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,789	21,484
TFE | Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	12,789
TFE | United States
Disaggregation of Revenue [Line Items]
Total net revenues	1,911	613
TFE | Asia
Disaggregation of Revenue [Line Items]
Total net revenues	10,878	20,871
Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	5,185	8,904
Photonics | Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	429
Photonics | Products and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total net revenues	4,756
Photonics | United States
Disaggregation of Revenue [Line Items]
Total net revenues	4,762	8,589
Photonics | Europe
Disaggregation of Revenue [Line Items]
Total net revenues	293	$ 315
Photonics | Rest of World
Disaggregation of Revenue [Line Items]
Total net revenues	$ 130

Revenue - Changes in Contract A

Revenue - Changes in Contract Assets and Contract Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
TFE
Revenue From Contract With Customers [Line Items]
Contract liabilities	$ 16,411	$ 15,394
Contract liabilities:
Change in contract liabilities	1,017
TFE | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Contract assets	854	1,368
Contract liabilities:
Change in contract assets	(514)
TFE | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract liabilities	5,319	5,190
Contract liabilities:
Change in contract liabilities	129
TFE | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract liabilities	11,092	10,204
Contract liabilities:
Change in contract liabilities	888
Photonics
Revenue From Contract With Customers [Line Items]
Contract assets	1,980	1,627
Contract liabilities	2,218	919
Contract liabilities:
Change in contract assets	353
Change in contract liabilities	1,299
Photonics | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Contract assets	1,692	1,346
Contract liabilities:
Change in contract assets	346
Photonics | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract liabilities	1,602	97
Contract liabilities:
Change in contract liabilities	1,505
Photonics | Retainage
Revenue From Contract With Customers [Line Items]
Contract assets	288	281
Contract liabilities:
Change in contract assets	7
Photonics | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract liabilities	616	$ 822
Contract liabilities:
Change in contract liabilities	$ (206)

Revenue - Additional Informatio

Revenue - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)Installment	Dec. 31, 2017USD ($)
Revenue From Contract With Customers [Line Items]
Revenue remaining performance obligation	$ 66,900,000
Revenue performance obligation, description of timing	We expect to recognize approximately 78% of our remaining performance obligations as revenue in 2018, and the balance in 2019.
TFE
Revenue From Contract With Customers [Line Items]
Contract liabilities	$ 16,411,000	$ 15,394,000
Revenue remaining performance obligation	$ 55,600,000
TFE | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Number of installments | Installment	3
Change in contract assets	$ (514,000)
TFE | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	2,100,000
Contract liabilities	11,092,000	10,204,000
TFE | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	39,000
Contract liabilities	5,319,000	5,190,000
Photonics
Revenue From Contract With Customers [Line Items]
Change in contract assets	353,000
Contract liabilities	2,218,000	919,000
Revenue remaining performance obligation	11,300,000
Photonics | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Change in contract assets	346,000
Photonics | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	206,000
Contract liabilities	616,000	822,000
Photonics | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	129,000
Contract liabilities	$ 1,602,000	$ 97,000

Inventories Stated at Lower of

Inventories Stated at Lower of Average Cost or Market (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Inventory [Line Items]
Raw materials	$ 15,458	$ 19,881
Work-in-progress	15,622	9,433
Finished goods	4,493	4,478
Inventories	$ 35,573	$ 33,792

Equity-Based Compensation - Add

Equity-Based Compensation - Additional information (Detail)	1 Months Ended	3 Months Ended
	Feb. 28, 2017Employee$ / sharesshares	Mar. 31, 2018shares	Apr. 01, 2017USD ($)	Jan. 01, 2017USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of common stock through payroll deductions		85.00%
Offering periods		2 years
Purchase intervals of a series		6 months
Maximum employee salary withholdings for purchase of common stock under the terms of the ESPP		15.00%
Cumulative effect of change in accumulated deficit | $				$ 1,100,000
Number of shares issued under employee stock purchase plan		216,988
RSU conversion ratio		100.00%
Annual incentive plan stock awards granted		106,375
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		4 years
Number of participants in restricted stock grants awarded | Employee	33
Annual incentive plan stock awards granted	134,000
Weighted-average fair value of grants per share | $ / shares	$ 9.63
Annual incentive plan equity-based compensation expense | $			$ 102,000

Effect of Recording Equity-Base

Effect of Recording Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 817	$ 1,077
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	134	255
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	406	718
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 277	$ 104

Option Activity and Changes (De

Option Activity and Changes (Detail)	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Shares
Options outstanding at December 30, 2017 | shares	2,925,861
Options granted | shares	106,375
Options cancelled and forfeited | shares	(339,812)
Options exercised | shares	(244,889)
Options outstanding at March 31, 2018 | shares	2,447,535
Options exercisable at March 31, 2018 | shares	1,643,807
Weighted Average Exercise Price
Options outstanding at December 30, 2017 | $ / shares	$ 7.62
Options granted | $ / shares	6.30
Options cancelled and forfeited | $ / shares	9.84
Options exercised | $ / shares	4.92
Options outstanding at March 31, 2018 | $ / shares	7.52
Options exercisable at March 31, 2018 | $ / shares	$ 7.08

Weighted-Average Fair Value of

Weighted-Average Fair Value of Stock Options and Employee Stock Purchase Rights using Weighted-Average Assumptions (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Stock Options
Weighted-average assumptions
Weighted-average fair value of grants per share	$ 2.30	$ 4.56
Expected volatility	41.97%	41.78%
Risk free interest rate	2.48%	1.38%
Expected term of options (in years)	4 years 2 months 23 days	2 years 6 months 14 days
Dividend yield	0.00%	0.00%
Stock Purchase Rights
Weighted-average assumptions
Weighted-average fair value of grants per share	$ 2.36	$ 2.74
Expected volatility	46.60%	40.66%
Risk free interest rate	1.82%	1.14%
Expected term of options (in years)	1 year 2 months 30 days	8 months 26 days
Dividend yield	0.00%	0.00%

Summary of Restricted Stock Uni

Summary of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Shares
Non-vested RSUs at December 30, 2017 | shares	769,451
Granted | shares	40,188
Vested | shares	(140,716)
Cancelled and forfeited | shares	(46,945)
Non-vested RSUs at March 31, 2018 | shares	621,978
Weighted Average Grant Date Fair Value
Non-vested RSUs at December 30, 2017 | $ / shares	$ 7.84
Granted | $ / shares	6.30
Vested | $ / shares	9.44
Cancelled and forfeited | $ / shares	7.77
Non-vested RSUs at March 31, 2018 | $ / shares	$ 7.39

Details of Finite-lived Intangi

Details of Finite-lived Intangible Assets by Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 8,387
Accumulated Amortization	(7,038)	$ (6,884)
Finite Lived, Net Carrying Amount	1,349	$ 1,503
TFE
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	7,172
Accumulated Amortization	(5,934)
Finite Lived, Net Carrying Amount	1,238
Photonics
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	1,215
Accumulated Amortization	(1,104)
Finite Lived, Net Carrying Amount	$ 111

Purchased Intangible Assets - A

Purchased Intangible Assets - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense of finite-lived intangibles	$ 154,000

Future Amortization Expense (De

Future Amortization Expense (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
2,018	$ 461
2,019	615
2,020	273
Finite Lived, Net Carrying Amount	$ 1,349	$ 1,503

Acquisition-Related Contingen55

Acquisition-Related Contingent Consideration - Additional Information (Detail) $ in Millions	Nov. 19, 2010USD ($)
Solar Implant Technologies | Revenue Earnout
Business Acquisition [Line Items]
Maximum amount of cash potentially earned in contingent compensation arrangements	$ 9

Reconciliation of Change in Fai

Reconciliation of Change in Fair Value Measurement of Contingent Consideration Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Business Acquisition, Contingent Consideration [Line Items]
Opening balance	$ 362	$ 759
Changes in fair value	(1)	80
Cash payments made		(2)
Closing balance	$ 361	$ 837

Balance Sheet Classification of

Balance Sheet Classification of Contingent Consideration Liability (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Business Combination, Transactions [Line Items]
Other accrued liabilities	$ 361	$ 362
Other accrued liabilities
Business Combination, Transactions [Line Items]
Other accrued liabilities	221	103
Other long-term liabilities
Business Combination, Transactions [Line Items]
Other accrued liabilities	$ 140	$ 259

Quantitative Range of Significa

Quantitative Range of Significant Unobservable Inputs Used in Calculation of Fair Value of Continent Consideration Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Business Acquisition, Contingent Consideration [Line Items]
Fair Value	$ 361	$ 362
Fair Value, Inputs, Level 3 | Revenue Earnout
Business Acquisition, Contingent Consideration [Line Items]
Valuation technique	Discounted cash flow
Fair Value	$ 361
Fair Value, Inputs, Level 3 | Revenue Earnout | Weighted Average
Business Acquisition, Contingent Consideration [Line Items]
Weighted average cost of capital	12.10%

Warranty - Additional Informati

Warranty - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018
Warranties [Line Items]
Minimum product warranty range	12 months
Maximum product warranty range	24 months

Activity in Warranty Provision

Activity in Warranty Provision Account (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Accrued Warranty [Line Items]
Opening balance	$ 994	$ 1,007
Expenditures incurred under warranties	(236)	(142)
Accruals for product warranties issued during the reporting period	104	250
Adjustments to previously existing warranty accruals	4	(9)
Closing balance	$ 866	$ 1,106

Balance Sheet Classification 61

Balance Sheet Classification of Warranty Provision Account (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 30, 2017	Apr. 01, 2017	Jan. 01, 2017
Product Warranty [Line Items]
Other accrued liabilities	$ 646		$ 757
Other long-term liabilities	220		237
Total warranty provision	$ 866	$ 994	$ 994	$ 1,106	$ 1,007

Guarantees - Additional Informa

Guarantees - Additional Information (Detail) $ in Millions	Mar. 31, 2018USD ($)
Guarantor Obligations [Line Items]
Letters of credit and bank guarantees outstanding, amount	$ 1
Letters of credit and bank guarantees collateralized by restricted cash	$ 1

Cash, Cash Equivalents and Shor

Cash, Cash Equivalents and Short-Term Investments and Long-Term Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 39,749	$ 42,533
Unrealized Holdings Gains		1
Unrealized Holdings Losses	73	46
Fair Value	39,676	42,488
Cash and Cash Equivalents
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,306	19,941
Fair Value	16,306	19,941
Cash and Cash Equivalents | Cash
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,284	13,195
Fair Value	10,284	13,195
Cash and Cash Equivalents | Money market funds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,522	6,746
Fair Value	5,522	6,746
Cash and Cash Equivalents | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	500
Fair Value	500
Short-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	19,135	15,710
Unrealized Holdings Gains		1
Unrealized Holdings Losses	42	13
Fair Value	19,093	15,698
Short-term Investments | Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	500	500
Unrealized Holdings Losses	2	3
Fair Value	498	497
Short-term Investments | U.S. treasury and agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,431	4,917
Unrealized Holdings Losses	11	4
Fair Value	5,420	4,913
Short-term Investments | Corporate bonds and medium-term notes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,964	4,502
Unrealized Holdings Losses	25	5
Fair Value	5,939	4,497
Short-term Investments | Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,150	2,500
Unrealized Holdings Gains		1
Unrealized Holdings Losses	4	1
Fair Value	4,146	2,500
Short-term Investments | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,090	3,291
Fair Value	3,090	3,291
Other Long-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,308	6,882
Unrealized Holdings Losses	31	33
Fair Value	4,277	6,849
Other Long-term Investments | Asset backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		500
Fair Value		500
Other Long-term Investments | U.S. treasury and agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,997	1,998
Unrealized Holdings Losses	14	12
Fair Value	1,983	1,986
Other Long-term Investments | Corporate bonds and medium-term notes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,311	4,384
Unrealized Holdings Losses	17	21
Fair Value	$ 2,294	$ 4,363

Fair Market Value of Investment

Fair Market Value of Investments with Unrealized Losses Not Deemed to be Other-Than Temporarily Impaired (Detail) $ in Thousands	Mar. 31, 2018USD ($)
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	$ 17,892
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	66
Unrealized Loss Position, Greater than 12 Months, Fair Value	1,497
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	7
Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	4,146
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	4
Corporate bonds and medium-term notes
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	6,838
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	36
Unrealized Loss Position, Greater than 12 Months, Fair Value	999
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	5
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Position, Greater than 12 Months, Fair Value	498
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	2
U.S. treasury and agency securities
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	6,908
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	$ 26

Contractual Maturities of Avail

Contractual Maturities of Available-For-Sale Securities (Detail) $ in Thousands	Mar. 31, 2018USD ($)
Amortized Cost
Amortized Cost, Due in one year or less	$ 25,157
Amortized Cost, Due after one through two years	4,308
Amortized Cost	29,465
Fair Value
Fair Value, Due in one year or less	25,115
Fair Value, Due after one through two years	4,277
Fair Value	$ 29,392

Fair Value Hierarchy of Availab

Fair Value Hierarchy of Available-for-Sale Securities Measured at Fair Value on Recurring Basis (Detail) $ in Thousands	Mar. 31, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	$ 29,392
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	29,392
Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	5,522
Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	4,146
Fair Value, Measurements, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	3,590
Fair Value, Measurements, Recurring | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	7,403
Fair Value, Measurements, Recurring | Corporate bonds and medium-term notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	8,233
Fair Value, Measurements, Recurring | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	498
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	10,903
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	5,522
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	5,381
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	18,489
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	4,146
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	3,590
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	2,022
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Corporate bonds and medium-term notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	8,233
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	$ 498

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018
Derivative [Line Items]
Maturity of foreign currency derivative	30 days

Summary of Outstanding Derivati

Summary of Outstanding Derivative Instruments on Gross Basis as Recorded in Consolidated Balance Sheets (Detail) - Undesignated Hedges - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 30, 2017
Derivatives, Fair Value [Line Items]
Notional Amounts		$ 873	$ 1,276
Derivative Liabilities		5	5
Forward foreign currency contracts
Derivatives, Fair Value [Line Items]
Notional Amounts		873	1,276
Derivative Liabilities	[1]	$ 5	$ 5
[1]	Other accrued liabilities

Equity - Additional Information

Equity - Additional Information (Detail) - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Nov. 21, 2013
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized amount			$ 30,000,000
Stock repurchase remained available for future stock repurchase	$ 1,500,000
Stock repurchased	0	0

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income before reclassification	$ 76	$ 38
Amounts reclassified from other comprehensive income	0	0
Other comprehensive income, net of tax	76	38
Ending balance	78,518
Foreign currency
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	535	343
Other comprehensive income before reclassification	104	34
Amounts reclassified from other comprehensive income	0	0
Other comprehensive income, net of tax	104	34
Ending balance	639	377
Unrealized holding gains (losses) on available-for-sale investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(45)	(22)
Other comprehensive income before reclassification	(28)	4
Amounts reclassified from other comprehensive income	0	0
Other comprehensive income, net of tax	(28)	4
Ending balance	(73)	(18)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	490	321
Amounts reclassified from other comprehensive income	0	0
Ending balance	$ 566	$ 359

Computation of Basic and Dilute

Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items]
Net income (loss)	$ (5,136)	$ 1,829
Weighted-average shares - basic	22,107	21,216
Effect of dilutive potential common shares		1,574
Weighted-average shares - diluted	22,107	22,790
Net income (loss) per share - basic	$ (0.23)	$ 0.09
Net income (loss) per share - diluted	$ (0.23)	$ 0.08

Antidilutive Securities Exclude

Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Share (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income (loss) per share	2,448	452
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income (loss) per share	622
Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income (loss) per share	673

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018Segment
Segment Reporting Disclosure [Line Items]
Number of reportable segments	2
Allocation of corporate expenses to the segments	3.00%

Information for Each Reportable

Information for Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Segment Reporting Information [Line Items]
Total segment net revenues	$ 17,974	$ 30,388
Income (loss) from operations	(5,121)	2,091
Interest income and other income (expense), net	145	110
Income (loss) before income taxes	(4,976)	2,201
TFE
Segment Reporting Information [Line Items]
Total segment net revenues	12,789	21,484
Photonics
Segment Reporting Information [Line Items]
Total segment net revenues	5,185	8,904
Operating Segments
Segment Reporting Information [Line Items]
Income (loss) from operations	(3,719)	3,324
Operating Segments | TFE
Segment Reporting Information [Line Items]
Income (loss) from operations	(2,509)	1,859
Operating Segments | Photonics
Segment Reporting Information [Line Items]
Income (loss) from operations	(1,210)	1,465
Unallocated Amount to Segment
Segment Reporting Information [Line Items]
Unallocated costs	$ (1,402)	$ (1,233)

Assets for Each Reportable Segm

Assets for Each Reportable Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Cash, cash equivalents and investments	$ 39,676	$ 42,488
Restricted cash	1,000	1,000
Deferred income taxes	4	4
Other current assets	1,018	1,001
Common property, plant and equipment	1,122	1,267
Other assets	762	743
Consolidated total assets	111,370	115,023
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	67,788	68,520
Operating Segments | TFE
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	52,055	52,156
Operating Segments | Photonics
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	$ 15,733	$ 16,364

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Income Taxes [Line Items]
Provision for income taxes	$ 160,000	$ 372,000
Corporate tax rate	21.00%		35.00%
Deposit for contested taxes and related interest	$ 762,000		$ 743,000
Inland Revenue, Singapore (IRAS)
Income Taxes [Line Items]
Deposit for contested taxes and related interest	762,000		$ 743,000
Foreign Tax Authority | Singapore
Income Taxes [Line Items]
Income tax charge (benefit)	$ 145,000

Restructuring Charges - Additio

Restructuring Charges - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Restructuring Cost and Reserve [Line Items]
Percentage of reduction of global workforce	6.00%
Reduction in salary, wages and other employee-related expenses due to implementation of plan	$ 1.8

Changes in Restructuring Reserv

Changes in Restructuring Reserves (Detail) - Severance And Other Employee Related Costs $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 0
Provision for restructuring reserves	95
Cash payments made	(95)
Ending balance	$ 0