Intevac (IVAC) 10-Q 30 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 29, 2018	Oct. 26, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 29, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	IVAC
Entity Registrant Name	INTEVAC INC
Entity Central Index Key	1,001,902
Current Fiscal Year End Date	--12-29
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,814,493
Entity Emerging Growth Company	false
Entity Small Business	true

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 21,753	$ 19,941
Short-term investments	17,175	15,698
Trade and other accounts receivable, net of allowances of $0 at both September 29, 2018 and at December 30, 2017	18,835	20,474
Inventories	34,679	33,792
Prepaid expenses and other current assets	2,610	2,524
Total current assets	95,052	92,429
Property, plant and equipment, net	11,046	12,478
Long-term investments	5,164	6,849
Restricted cash	1,569	1,000
Intangible assets, net of accumulated amortization of $7,345 at September 29, 2018 and $6,884 at December 30, 2017	1,042	1,503
Deferred income taxes and other long-term assets	744	764
Total assets	114,617	115,023
Current liabilities:
Accounts payable	5,956	3,949
Accrued payroll and related liabilities	4,272	6,818
Other accrued liabilities	10,995	7,688
Customer advances	11,616	11,026
Total current liabilities	32,839	29,481
Other long-term liabilities	2,436	2,879
Stockholders' equity:
Common stock, $0.001 par value	23	22
Additional paid-in capital	182,354	177,521
Treasury stock, 4,845 shares at both September 29, 2018 and December 30, 2017	(28,489)	(28,489)
Accumulated other comprehensive income	371	490
Accumulated deficit	(74,917)	(66,881)
Total stockholders' equity	79,342	82,663
Total liabilities and stockholders' equity	$ 114,617	$ 115,023

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Net of allowances of trade, note and other accounts receivable	$ 0	$ 0
Net of accumulated amortization of intangible assets	$ 7,345	$ 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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Net revenues:
Total net revenues	$ 19,466	$ 26,726	$ 63,538	$ 88,077
Cost of net revenues:
Total cost of net revenues	11,980	15,428	41,416	52,261
Gross profit	7,486	11,298	22,122	35,816
Operating expenses:
Research and development	3,737	4,535	12,889	13,635
Selling, general and administrative	4,842	5,495	15,382	17,482
Total operating expenses	8,579	10,030	28,271	31,117
Income (loss) from operations	(1,093)	1,268	(6,149)	4,699
Interest income and other income (expense), net	186	28	464	265
Income (loss) before income taxes	(907)	1,296	(5,685)	4,964
Provision for income taxes	192	66	717	805
Net income (loss)	$ (1,099)	$ 1,230	$ (6,402)	$ 4,159
Net income (loss) per share:
Basic	$ (0.05)	$ 0.06	$ (0.29)	$ 0.19
Diluted	$ (0.05)	$ 0.05	$ (0.29)	$ 0.18
Weighted average common shares outstanding:
Basic	22,719	21,714	22,429	21,475
Diluted	22,719	22,970	22,429	22,989
Systems and components
Net revenues:
Total net revenues	$ 17,140	$ 24,537	$ 55,947	$ 82,822
Cost of net revenues:
Total cost of net revenues	9,765	13,402	34,362	47,419
Technology development
Net revenues:
Total net revenues	2,326	2,189	7,591	5,255
Cost of net revenues:
Total cost of net revenues	$ 2,215	$ 2,026	$ 7,054	$ 4,842

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Net income (loss)	$ (1,099)	$ 1,230	$ (6,402)	$ 4,159
Other comprehensive income (loss), before tax
Change in unrealized net loss on available-for-sale investments	13	5	7	8
Foreign currency translation gains (losses)	(86)	39	(126)	114
Other comprehensive income (loss), before tax	(73)	44	(119)	122
Income tax (expense) benefit related to items in other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	(73)	44	(119)	122
Comprehensive income (loss)	$ (1,172)	$ 1,274	$ (6,521)	$ 4,281

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Operating activities
Net income (loss)	$ (6,402)	$ 4,159
Adjustments to reconcile net income (loss) to net cash and cash equivalents provided by (used in) operating activities:
Depreciation and amortization	3,587	2,877
Net amortization (accretion) of investment premiums and discounts	(67)	53
Equity-based compensation	2,454	3,012
Change in the fair value of acquisition-related contingent consideration	8	(181)
Deferred income taxes		(1)
Loss on disposal of equipment	442
Changes in operating assets and liabilities	2,042	(11,658)
Total adjustments	8,466	(5,898)
Net cash and cash equivalents provided by (used) in operating activities	2,064	(1,739)
Investing activities
Purchases of investments	(24,640)	(21,968)
Proceeds from sales and maturities of investments	24,922	18,916
Purchases of leasehold improvements and equipment	(2,219)	(3,553)
Net cash and cash equivalents used in investing activities	(1,937)	(6,605)
Financing activities
Net proceeds from issuance of common stock	3,199	2,344
Taxes paid related to net share settlement	(819)	(1,988)
Payment of acquisition-related contingent consideration		(174)
Net cash and cash equivalents provided by financing activities	2,380	182
Effect of exchange rate changes on cash	(126)	114
Net increase (decrease) in cash, cash equivalents and restricted cash	2,381	(8,048)
Cash, cash equivalents and restricted cash at beginning of period	20,941	28,645
Cash, cash equivalents and restricted cash at end of period	$ 23,322	$ 20,597

Description of Business and Bas

Description of Business and Basis of Presentation	9 Months Ended
	Sep. 29, 2018
Description of Business and Basis of Presentation	1. Description of Business and Basis of Presentation Intevac, Inc. (together with its subsidiaries “Intevac,” the “Company” or “we”) 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	9 Months Ended
	Sep. 29, 2018
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements Recently Issued Accounting Standards Not Yet Adopted In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2018-15, Other—Internal-Use 350-40): In February 2018, the FASB issued ASU 2018-02, 2018-02 ASU 2018-02 In February 2016, the FASB issued ASU 2016-02, Intevac leases certain facilities under non-cancelable We plan to adopt the standard as of December 30, 2018, the beginning of fiscal 2019. We will elect the package of practical expedients permitted under the transition guidance within the new standard, which, among other things, allows us to carry forward the historical lease classification. In addition, we are electing the hindsight practical expedient to determine the reasonably certain lease term for existing leases. We will make an accounting policy election to keep leases with an initial term of 12 months or less off of the balance sheet. We will recognize those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. We also plan to elect the practical expedient that will allow us to apply the new lease guidance at its effective date, December 30, 2018, without adjusting the comparative financial statements. We are currently completing the assessment phase of the implementation project and are finalizing our review of the impact of adoption. We expect the adoption of these accounting changes will materially increase our assets and liabilities, but will not have a material impact on our results of operations, equity, or cash flows. Adoption of New Accounting Standard On December 31, 2017, we adopted the new accounting standard ASC 606, Revenue from Contracts with Customers and all the related amendments (“new revenue standard”) to all contracts using the modified retrospective method. We recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of the accumulated deficit. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis. 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. Intevac recognizes revenue in certain circumstances before delivery has occurred (commonly referred to as bill and hold transactions). In such circumstances, among other things, risk of ownership has passed to the customer, the customer has made a written fixed commitment to purchase the finished goods, the customer has requested the finished goods be held for future delivery as scheduled and designated by them, and no additional performance obligations exist by Intevac. For these transactions, the finished goods are segregated from inventory and normal billing and credit terms granted. 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 by 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, 2017 Adjustments Due to ASC 606 Balance at December 31, 2017 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 select condensed consolidated statement of operations line items was as follows (in thousands): Three Months Ended Nine Months Ended September 29, 2018 As Balances ASC 606 Effect of As Reported Balances ASC 606 Effect of (In thousands) Systems and components revenues $ 17,140 $ 17,033 $ 107 $ 55,947 $ 55,611 $ 336 Total net revenues $ 19,466 $ 19,359 $ 107 $ 63,538 $ 63,202 $ 336 Gross profit $ 7,486 $ 7,379 $ 107 $ 22,122 $ 21,786 $ 336 Income (loss) from operations $ (1,093 ) $ (1,200 ) $ 107 $ (6,149 ) $ (6,485 ) $ 336 Income (loss) before income taxes $ (907 ) $ (1,014 ) $ 107 $ (5,685 ) $ (6,021 ) $ 336 Net loss $ (1,099 ) $ (1,206 ) $ 107 $ (6,402 ) $ (6,738 ) $ 336 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select condensed consolidated balance sheet line items was as follows (in thousands): As of September 29, 2018 As Reported Balances without ASC 606 Effect of Change Other accrued liabilities $ 10,995 $ 9,697 $ 1,298 Total current liabilities $ 32,839 $ 31,541 $ 1,298 Accumulated deficit $ (74,917 ) $ (73,619 ) $ (1,298 ) Total stockholders’ equity $ 79,342 $ 80,640 $ (1,298 )

Revenue

Revenue	9 Months Ended
	Sep. 29, 2018
Revenue	3. Revenue The following tables represent a disaggregation of revenue from contracts with customers for the three and nine months ended September 29, 2018 and September 30, 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 September 29, 2018 Three Months Ended September 30, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 9,476 $ — $ 51 $ 9,527 $ 15,620 $ — $ 275 $ 15,895 Field service 2,581 — — 2,581 1,282 — — 1,282 Total TFE net revenues $ 12,057 $ — $ 51 $ 12,108 $ 16,902 $ — $ 275 $ 17,177 Nine Months Ended September 29, 2018 Nine Months Ended September 30, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 39,090 $ 1 $ 54 $ 39,145 $ 34,875 $ 13,138 $ 9,271 $ 57,284 Field service 6,561 — 39 6,600 3,803 — — 3,803 Total TFE net revenues $ 45,651 $ 1 $ 93 $ 45,745 $ 38,678 $ 13,138 $ 9,271 $ 61,087 Three Months Ended Nine Months Ended Photonics September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Products: Military products $ 4,202 $ 6,989 $ 8,601 $ 20,908 Commercial products 84 38 138 100 Repair and other services 746 333 1,463 727 Total Photonics product net revenues 5,032 7,360 10,202 21,735 Technology development: CPFF 1,819 1,446 5,829 2,516 FFP 494 728 1,726 2,724 Time and materials 13 15 36 15 Total technology development net revenues 2,326 2,189 7,591 5,255 Total Photonics net revenues $ 7,358 $ 9,549 $ 17,793 $ 26,990 Primary Geographical Markets Three Months Ended Three Months Ended September 29, 2018 September 30, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 287 $ 6,868 $ 7,155 $ 1,370 $ 8,924 $ 10,294 Asia 11,821 — 11,821 15,807 — 15,807 Europe — 457 457 — 94 94 Rest of World — 33 33 — 531 531 Total net revenues $ 12,108 $ 7,358 $ 19,466 $ 17,177 $ 9,549 $ 26,726 Nine Months Ended Nine Months Ended September 29, 2018 September 30, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 3,549 $ 16,628 $ 20,177 $ 4,033 $ 25,846 $ 29,879 Asia 42,196 31 42,227 57,054 8 57,062 Europe — 937 937 — 605 605 Rest of World — 197 197 — 531 531 Total net revenues $ 45,745 $ 17,793 $ 63,538 $ 61,087 $ 26,990 $ 88,077 Timing of Revenue Recognition Three Months Ended Nine Months Ended September 29, 2018 September 29, 2018 (In thousands) TFE Photonics Total TFE Photonics Total Products transferred at a point in time $ 12,108 $ 746 $ 12,854 $ 45,745 $ 1,463 $ 47,208 Products and services transferred over time — 6,612 6,612 — 16,330 16,330 $ 12,108 $ 7,358 $ 19,466 $ 45,745 $ 17,793 $ 63,538 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 nine months ended September 29, 2018: September 29, 2018 December 30, 2017 Nine Months Change (In thousands) TFE: Contract assets: Accounts receivable, unbilled $ 517 $ 1,368 $ (851 ) Contract liabilities: Deferred revenue $ 6,200 $ 5,190 $ 1,010 Customer advances 11,066 10,204 862 $ 17,266 $ 15,394 $ 1,872 Photonics: Contract assets: Accounts receivable, unbilled $ 1,476 $ 1,346 $ 130 Retainage 145 281 (136 ) $ 1,621 $ 1,627 $ (6 ) Contract liabilities: Deferred revenue $ 1,317 $ 97 $ 1,220 Customer advances 550 822 (272 ) $ 1,867 $ 919 $ 948 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 nine months ended September 29, 2018, contract assets in our TFE segment decreased by $851,000 primarily due to the final billing on four systems that were pending acceptance as of December 30, 2017 that completed installation and were accepted by the customer, offset by the accrual of revenue for an additional two systems delivered during the first nine months of fiscal 2018 that were pending acceptance as of September 29, 2018. Customer advances in our TFE segment generally represent amounts billed to the customer prior to transferring goods which represents a contract liability. We have 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 we do 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 nine months ended September 29, 2018, we recognized revenue in our TFE segment of $6.6 million and $69,000 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 nine months ended September 29, 2018, contract assets in our Photonics segment decreased by $6,000 primarily due to the final settlement of retainage amounts on certain CPFF contracts, offset in part by 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 $1.3 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 nine months ended September 29, 2018, we recognized revenue in our Photonics segment of $536,000 and $324,000 that was included in customer advances and deferred revenue, respectively, at the beginning of the period. On September 29, 2018 we had $72.2 million of remaining performance obligations, which we also refer to as total backlog. Backlog at September 29, 2018 consisted of $63.6 million of TFE backlog and $8.6 million of Photonics backlog. We expect to recognize approximately 44% of our remaining performance obligations as revenue in 2018, 52% in 2019 and 4% in 2020.

Inventories

Inventories	9 Months Ended
	Sep. 29, 2018
Inventories	4. Inventories Inventories are stated at the lower of average cost or market and consist of the following: September 29, December 30, 2018 2017 (In thousands) Raw materials $ 14,746 $ 19,881 Work-in-progress 15,493 9,433 Finished goods 4,440 4,478 $ 34,679 $ 33,792 Finished goods inventory consists primarily of completed systems that are undergoing installation and acceptance testing.

Equity-Based Compensation

Equity-Based Compensation	9 Months Ended
	Sep. 29, 2018
Equity-Based Compensation	5. Equity-Based Compensation At September 29, 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 and nine months ended September 29, 2018 and September 30, 2017 was as follows: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Equity-based compensation by type of award: Stock options $ 213 $ 350 $ 563 $ 808 RSUs 309 731 945 1,943 ESPP awards 330 67 946 261 Total equity-based compensation $ 852 $ 1,148 $ 2,454 $ 3,012 Equity-based compensation expense is based on awards ultimately expected to vest and such amount has been historically reduced for estimated forfeitures. Beginning January 1, 2017, Intevac accounts for forfeitures as they occur, rather than 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. A summary of the options activity is as follows: Shares Weighted-Average Exercise Price Options outstanding at December 30, 2017 2,925,861 $ 7.62 Options granted 421,125 $ 5.13 Options cancelled and forfeited (936,428 ) $ 9.31 Options exercised (321,190 ) $ 4.87 Options outstanding at September 29, 2018 2,089,368 $ 6.78 Options exercisable at September 29, 2018 1,331,565 $ 6.60 Intevac issued 410,522 shares under the ESPP during the nine months ended September 29, 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 Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 Stock Options: Weighted-average fair value of grants per share $ 1.81 $ 3.89 $ 1.98 $ 4.54 Expected volatility 44.10 % 42.10 % 43.83 % 40.54 % Risk-free interest rate 2.87 % 1.84 % 2.58 % 1.77 % Expected term of options (in years) 3.90 4.08 4.41 4.10 Dividend yield None None None None Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 Stock Purchase Rights: Weighted-average fair value of grants per share $ 1.87 $ 2.76 $ 2.24 $ 2.75 Expected volatility 50.64 % 48.59 % 47.64 % 43.51 % Risk-free interest rate 2.58 % 1.36 % 2.01 % 1.22 % Expected term of purchase rights (in years) 1.58 0.50 1.33 0.65 Dividend yield None None None None The computation of the expected volatility assumptions used in the Black-Scholes calculations for new stock option grants and employee stock 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 217,917 $ 5.07 Vested (425,956 ) $ 7.15 Cancelled and forfeited (98,737 ) $ 8.74 Non-vested 462,675 $ 6.98 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	9 Months Ended
	Sep. 29, 2018
Purchased Intangible Assets	6. Purchased Intangible Assets Details of finite-lived intangible assets by segment as of September 29, 2018 are as follows. September 29, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount (In thousands) TFE $ 7,172 $ (6,220 ) $ 952 Photonics 1,215 (1,125 ) 90 $ 8,387 $ (7,345 ) $ 1,042 Total amortization expense of finite-lived intangibles for the three and nine months ended September 29, 2018 was $154,000 and $461,000, respectively. As of September 29, 2018, future amortization expense is expected to be as follows. (In thousands) 2018 $ 154 2019 615 2020 273 $ 1,042

Acquisition-Related Contingent

Acquisition-Related Contingent Consideration	9 Months Ended
	Sep. 29, 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 in cash a revenue earnout 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 September 29, 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 income (loss) from operations within the condensed consolidated statement of operations. The following table represents a reconciliation of the change in the fair value measurement of the contingent consideration liability for the three and nine month periods ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Opening balance $ 370 $ 859 $ 362 $ 759 Changes in fair value — (283 ) 8 (181 ) Cash payments made — (172 ) — (174 ) Closing balance $ 370 $ 404 $ 370 $ 404 The following table displays the balance sheet classification of the contingent consideration liability account at September 29, 2018 and at December 30, 2017: September 29, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 370 $ 103 Other long-term liabilities — 259 Total acquisition-related contingent consideration $ 370 $ 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 September 29, 2018. Significant increases or decreases in any of these inputs in isolation would result in a significantly lower or higher fair value measurement. Quantitative Information about Level 3 Fair Value Measurements at September 29, 2018 Fair Value Valuation Technique Unobservable Input Weighted Average (In thousands, except for percentages) Revenue Earnout $ 370 Discounted cash flow Weighted average cost of capital 12.1 %

Warranty

Warranty	9 Months Ended
	Sep. 29, 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, DCP and solar cell manufacturing systems 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 and nine months ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Opening balance $ 911 $ 1,220 $ 994 $ 1,007 Expenditures incurred under warranties (51 ) (360 ) (469 ) (640 ) Accruals for product warranties issued during the reporting period 68 169 347 675 Adjustments to previously existing warranty accruals (139 ) 106 (83 ) 93 Closing balance $ 789 $ 1,135 $ 789 $ 1,135 The following table displays the balance sheet classification of the warranty provision account at September 29, 2018 and at December 30, 2017: September 29, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 622 $ 757 Other long-term liabilities 167 237 Total warranty provision $ 789 $ 994

Guarantees

Guarantees	9 Months Ended
	Sep. 29, 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 September 29, 2018, we had letters of credit and bank guarantees outstanding totaling $1.6 million, including a 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 $1.6 million of restricted cash.

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	9 Months Ended
	Sep. 29, 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: September 29, 2018 Amortized Cost Unrealized Holding Gains Unrealized Holding Losses Fair Value (In thousands) Cash and cash equivalents: Cash $ 15,408 $ — $ — $ 15,408 Money market funds 5,536 — — 5,536 U.S. treasury and agency securities 809 — — 809 Total cash and cash equivalents $ 21,753 $ — $ — $ 21,753 Short-term investments: Certificates of deposit $ 5,797 $ 2 $ — $ 5,799 Commercial paper 2,726 — — 2,726 Corporate bonds and medium-term notes 3,054 — 12 3,042 Municipal bonds 499 — 2 497 U.S. treasury and agency securities 5,123 — 12 5,111 Total short-term investments $ 17,199 $ 2 $ 26 $ 17,175 Long-term investments: Certificates of deposit $ 500 $ — $ — $ 500 Corporate bonds and medium-term notes 3,679 1 6 3,674 U.S. treasury and agency securities 999 — 9 990 Total long-term investments $ 5,178 $ 1 $ 15 $ 5,164 Total cash, cash equivalents, and investments $ 44,130 $ 3 $ 41 $ 44,092 December 30, 2017 Amortized Cost Unrealized Holding Gains Unrealized Holding Losses 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 contractual maturities of available-for-sale September 29, 2018 Amortized Cost Fair Value (In thousands) Due in one year or less $ 23,544 $ 23,520 Due after one through two years 5,178 5,164 $ 28,722 $ 28,684 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 September 29, 2018. September 29, 2018 In Loss Position for Less than 12 Months In Loss Position for Greater than 12 Months Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (In thousands) Corporate bonds and medium-term notes $ 2,925 $ 10 $ 1,950 $ 8 Municipal bonds 497 2 — — U.S. treasury and agency securities 3,018 10 2,587 11 $ 6,440 $ 22 $ 4,537 $ 19 All prices for the fixed maturity securities including U.S. Treasury and agency securities, certificates of deposit, commercial paper, corporate bonds 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 for a security in an orderly sale. 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 September 29, 2018 Total Level 1 Level 2 (In thousands) Recurring fair value measurements: Available-for-sale Money market funds $ 5,536 $ 5,536 $ — U.S. treasury and agency securities 6,910 5,913 997 Certificates of deposit 6,299 — 6,299 Commercial paper 2,726 — 2,726 Corporate bonds and medium-term notes 6,716 — 6,716 Municipal bonds 497 — 497 Total recurring fair value measurements $ 28,684 $ 11,449 $ 17,235

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 29, 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 September 29, 2018 and December 30, 2017: Notional Amounts Derivative Liabilities Derivative Instrument September 29 2018 December 30, 2017 September 29, 2018 December 30, 2017 Balance Sheet Line Fair Value Balance Sheet Line Fair Value (in thousands) Undesignated Hedges: Forward Foreign Currency Contracts $ 1,470 $ 1,276 (a) $ 7 (a) $ 5 Total Hedges $ 1,470 $ 1,276 $ 7 $ 5 (a) Other accrued liabilities

Equity

Equity	9 Months Ended
	Sep. 29, 2018
Equity	12. Equity Condensed Consolidated Statement of Changes in Equity The changes in stockholders’ equity by component for the three and nine months ended September 29, 2018 and September 30, 2017, are as follows (in thousands): Three months ended September 29, 2018 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at June 30, 2018 $ 180,449 $ (28,489 ) $ 444 $ (73,818 ) $ 78,586 Common stock issued under employee plans 1,076 — — — 1,076 Equity-based compensation expense 852 — — — 852 Net loss — — — (1,099 ) (1,099 ) Other comprehensive loss — — (73 ) — (73 ) Balance at September 29, 2018 $ 182,377 $ (28,489 ) $ 371 $ (74,917 ) $ 79,342 Nine months ended September 29, 2018 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at December 30, 2017 $ 177,543 $ (28,489 ) $ 490 $ (66,881 ) $ 82,663 Cumulative effect of accounting change — — — (1,634 ) (1,634 ) Common stock issued under employee plans 2,380 — — — 2,380 Equity-based compensation expense 2,454 — — — 2,454 Net loss — — — (6,402 ) (6,402 ) Other comprehensive loss — — (119 ) — (119 ) Balance at September 29, 2018 $ 182,377 $ (28,489 ) $ 371 $ (74,917 ) $ 79,342 Three months ended September 30, 2017 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at July 1, 2017 $ 174,267 $ (28,489 ) $ 399 $ (68,070 ) $ 78,107 Common stock issued under employee plans 889 — — — 889 Equity-based compensation expense 1,148 — — — 1,148 Net income — — — 1,230 1,230 Other comprehensive income — — 44 — 44 Balance at September 30, 2017 $ 176,304 $ (28,489 ) $ 443 $ (66,840 ) $ 81,418 Nine months ended September 30, 2017 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at December 31, 2016 $ 171,335 $ (28,489 ) $ 321 $ (69,901 ) $ 73,266 Cumulative effect of accounting change 1,098 — — (1,098 ) — Common stock issued under employee plans 356 — — — 356 Grant of RSUs to settle accrued bonus 605 — — — 605 Equity-based compensation expense 2,910 — — — 2,910 Net income — — — 4,159 4,159 Other comprehensive income — — 122 — 122 Balance at September 30, 2017 $ 176,304 $ (28,489 ) $ 443 $ (66,840 ) $ 81,418 Accumulated Other Comprehensive Income The changes in accumulated other comprehensive income by component for the three and nine months ended September 29, 2018 and September 30, 2017, are as follows. Three Months Ended Nine Months Ended September 29, 2018 Foreign currency Unrealized available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 495 $ (51 ) $ 444 $ 535 $ (45 ) $ 490 Other comprehensive income before reclassification (86 ) 13 (73 ) (126 ) 7 (119 ) Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income (86 ) 13 (73 ) (126 ) 7 (119 ) Ending balance $ 409 $ (38 ) $ 371 $ 409 $ (38 ) $ 371 Three Months Ended Nine Months Ended September 30, 2017 Foreign currency Unrealized holding losses on available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 418 $ (19 ) $ 399 $ 343 $ (22 ) $ 321 Other comprehensive income (loss) before reclassification 39 5 44 114 8 122 Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income (loss) 39 5 44 114 8 122 Ending balance $ 457 $ (14 ) $ 443 $ 457 $ (14 ) $ 443 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. On August 15, 2018, Intevac’s Board of Directors approved a $10.0 million increase to the original stock repurchase program for an aggregate authorized amount of $40.0 million. At September 29, 2018, $11.5 million remains available for future stock repurchases under the repurchase program. Intevac did not make any stock repurchases during the three and nine months ended September 29, 2018 and September 30, 2017, respectively. Intevac records treasury stock purchases under the cost method using the first-in, first-out paid-in paid-in

Net Income (Loss) Per Share

Net Income (Loss) Per Share	9 Months Ended
	Sep. 29, 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 for the three and nine months ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands, except per share amounts) Net income (loss) $ (1,099 ) $ 1,230 $ (6,402 ) $ 4,159 Weighted-average shares – basic 22,719 21,714 22,429 21,475 Effect of dilutive potential common shares — 1,256 — 1,514 Weighted-average shares – diluted 22,719 22,970 22,429 22,989 Net income (loss) per share – basic $ (0.05 ) $ 0.06 $ (0.29 ) $ 0.19 Net income (loss) per share –diluted $ (0.05 ) $ 0.05 $ (0.29 ) $ 0.18 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: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Stock options to purchase common stock 2,089 826 2,089 834 RSUs 463 — 463 — Employee stock purchase plan 800 — 800 —

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 29, 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 September 29, 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 and nine months ended September 29, 2018 and September 30, 2017 is as follows: Net Revenues Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) TFE $ 12,108 $ 17,177 $ 45,745 $ 61,087 Photonics 7,358 9,549 17,793 26,990 Total segment net revenues $ 19,466 $ 26,726 $ 63,538 $ 88,077 Operating Income (Loss) Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) TFE $ (907 ) $ 1,213 $ (2,197 ) $ 4,821 Photonics 688 1,417 (966 ) 3,646 Total segment operating income (loss) (219 ) 2,630 (3,163 ) 8,467 Unallocated costs (874 ) (1,362 ) (2,986 ) (3,768 ) Income (loss) from operations (1,093 ) 1,268 (6,149 ) 4,699 Interest income and other income (expense), net 186 28 464 265 Income (loss) before income taxes $ (907 ) $ 1,296 $ (5,685 ) $ 4,964 Total assets for each reportable segment as of September 29, 2018 and December 30, 2017 are as follows: Assets September 29, 2018 December 30, 2017 (In thousands) TFE $ 48,961 $ 52,156 Photonics 17,007 16,364 Total segment assets 65,968 68,520 Cash, cash equivalents and investments 44,092 42,488 Restricted cash 1,569 1,000 Deferred income taxes 4 4 Other current assets 1,201 1,001 Common property, plant and equipment 1,060 1,267 Other assets 723 743 Consolidated total assets $ 114,617 $ 115,023

Income Taxes

Income Taxes	9 Months Ended
	Sep. 29, 2018
Income Taxes	15. Income Taxes Intevac recorded income tax provisions of $192,000 and $717,000 for the three and nine months ended September 29, 2018, respectively, and $66,000 and $805,000 for the three and nine months ended September 30, 2017, respectively. The income tax provisions for the three and nine months 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 and nine months ended September 29, 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 $723,000 at September 29, 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.

Contingencies

Contingencies	9 Months Ended
	Sep. 29, 2018
Contingencies	16. 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.

Restructuring Charges

Restructuring Charges	9 Months Ended
	Sep. 29, 2018
Restructuring Charges	17. 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 nine months ended September 29, 2018 are as follows. Nine Months Ended September 29, 2018 Severance and employee- related costs (In thousands) Beginning balance $ — Provision for restructuring reserves 95 Cash payments made (95 ) Ending balance $ —

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 29, 2018
Recently Issued Accounting Standards Not Yet Adopted	Recently Issued Accounting Standards Not Yet Adopted In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2018-15, Other—Internal-Use 350-40): In February 2018, the FASB issued ASU 2018-02, 2018-02 ASU 2018-02 In February 2016, the FASB issued ASU 2016-02, Intevac leases certain facilities under non-cancelable We plan to adopt the standard as of December 30, 2018, the beginning of fiscal 2019. We will elect the package of practical expedients permitted under the transition guidance within the new standard, which, among other things, allows us to carry forward the historical lease classification. In addition, we are electing the hindsight practical expedient to determine the reasonably certain lease term for existing leases. We will make an accounting policy election to keep leases with an initial term of 12 months or less off of the balance sheet. We will recognize those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. We also plan to elect the practical expedient that will allow us to apply the new lease guidance at its effective date, December 30, 2018, without adjusting the comparative financial statements. We are currently completing the assessment phase of the implementation project and are finalizing our review of the impact of adoption. We expect the adoption of these accounting changes will materially increase our assets and liabilities, but will not have a material impact on our results of operations, equity, or cash flows.
Adoption of New Accounting Standard	Adoption of New Accounting Standard On December 31, 2017, we adopted the new accounting standard ASC 606, Revenue from Contracts with Customers and all the related amendments (“new revenue standard”) to all contracts using the modified retrospective method. We recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of the accumulated deficit. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis. 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. Intevac recognizes revenue in certain circumstances before delivery has occurred (commonly referred to as bill and hold transactions). In such circumstances, among other things, risk of ownership has passed to the customer, the customer has made a written fixed commitment to purchase the finished goods, the customer has requested the finished goods be held for future delivery as scheduled and designated by them, and no additional performance obligations exist by Intevac. For these transactions, the finished goods are segregated from inventory and normal billing and credit terms granted. 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 by 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, 2017 Adjustments Due to ASC 606 Balance at December 31, 2017 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 select condensed consolidated statement of operations line items was as follows (in thousands): Three Months Ended Nine Months Ended September 29, 2018 As Balances ASC 606 Effect of As Reported Balances ASC 606 Effect of (In thousands) Systems and components revenues $ 17,140 $ 17,033 $ 107 $ 55,947 $ 55,611 $ 336 Total net revenues $ 19,466 $ 19,359 $ 107 $ 63,538 $ 63,202 $ 336 Gross profit $ 7,486 $ 7,379 $ 107 $ 22,122 $ 21,786 $ 336 Income (loss) from operations $ (1,093 ) $ (1,200 ) $ 107 $ (6,149 ) $ (6,485 ) $ 336 Income (loss) before income taxes $ (907 ) $ (1,014 ) $ 107 $ (5,685 ) $ (6,021 ) $ 336 Net loss $ (1,099 ) $ (1,206 ) $ 107 $ (6,402 ) $ (6,738 ) $ 336 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select condensed consolidated balance sheet line items was as follows (in thousands): As of September 29, 2018 As Reported Balances without ASC 606 Effect of Change Other accrued liabilities $ 10,995 $ 9,697 $ 1,298 Total current liabilities $ 32,839 $ 31,541 $ 1,298 Accumulated deficit $ (74,917 ) $ (73,619 ) $ (1,298 ) Total stockholders’ equity $ 79,342 $ 80,640 $ (1,298 )

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 29, 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, 2017 Adjustments Due to ASC 606 Balance at December 31, 2017 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 select condensed consolidated statement of operations line items was as follows (in thousands): Three Months Ended Nine Months Ended September 29, 2018 As Balances ASC 606 Effect of As Reported Balances ASC 606 Effect of (In thousands) Systems and components revenues $ 17,140 $ 17,033 $ 107 $ 55,947 $ 55,611 $ 336 Total net revenues $ 19,466 $ 19,359 $ 107 $ 63,538 $ 63,202 $ 336 Gross profit $ 7,486 $ 7,379 $ 107 $ 22,122 $ 21,786 $ 336 Income (loss) from operations $ (1,093 ) $ (1,200 ) $ 107 $ (6,149 ) $ (6,485 ) $ 336 Income (loss) before income taxes $ (907 ) $ (1,014 ) $ 107 $ (5,685 ) $ (6,021 ) $ 336 Net loss $ (1,099 ) $ (1,206 ) $ 107 $ (6,402 ) $ (6,738 ) $ 336 In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on select condensed consolidated balance sheet line items was as follows (in thousands): As of September 29, 2018 As Reported Balances without ASC 606 Effect of Change Other accrued liabilities $ 10,995 $ 9,697 $ 1,298 Total current liabilities $ 32,839 $ 31,541 $ 1,298 Accumulated deficit $ (74,917 ) $ (73,619 ) $ (1,298 ) Total stockholders’ equity $ 79,342 $ 80,640 $ (1,298 )

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 29, 2018
Disaggregation of Revenue from Contracts with Customers	The following tables represent a disaggregation of revenue from contracts with customers for the three and nine months ended September 29, 2018 and September 30, 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 September 29, 2018 Three Months Ended September 30, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 9,476 $ — $ 51 $ 9,527 $ 15,620 $ — $ 275 $ 15,895 Field service 2,581 — — 2,581 1,282 — — 1,282 Total TFE net revenues $ 12,057 $ — $ 51 $ 12,108 $ 16,902 $ — $ 275 $ 17,177 Nine Months Ended September 29, 2018 Nine Months Ended September 30, 2017 (In thousands) HDD DCP PV Total HDD DCP PV Total Systems, upgrades and spare parts $ 39,090 $ 1 $ 54 $ 39,145 $ 34,875 $ 13,138 $ 9,271 $ 57,284 Field service 6,561 — 39 6,600 3,803 — — 3,803 Total TFE net revenues $ 45,651 $ 1 $ 93 $ 45,745 $ 38,678 $ 13,138 $ 9,271 $ 61,087 Three Months Ended Nine Months Ended Photonics September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Products: Military products $ 4,202 $ 6,989 $ 8,601 $ 20,908 Commercial products 84 38 138 100 Repair and other services 746 333 1,463 727 Total Photonics product net revenues 5,032 7,360 10,202 21,735 Technology development: CPFF 1,819 1,446 5,829 2,516 FFP 494 728 1,726 2,724 Time and materials 13 15 36 15 Total technology development net revenues 2,326 2,189 7,591 5,255 Total Photonics net revenues $ 7,358 $ 9,549 $ 17,793 $ 26,990 Primary Geographical Markets Three Months Ended Three Months Ended September 29, 2018 September 30, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 287 $ 6,868 $ 7,155 $ 1,370 $ 8,924 $ 10,294 Asia 11,821 — 11,821 15,807 — 15,807 Europe — 457 457 — 94 94 Rest of World — 33 33 — 531 531 Total net revenues $ 12,108 $ 7,358 $ 19,466 $ 17,177 $ 9,549 $ 26,726 Nine Months Ended Nine Months Ended September 29, 2018 September 30, 2017 (In thousands) TFE Photonics Total TFE Photonics Total United States $ 3,549 $ 16,628 $ 20,177 $ 4,033 $ 25,846 $ 29,879 Asia 42,196 31 42,227 57,054 8 57,062 Europe — 937 937 — 605 605 Rest of World — 197 197 — 531 531 Total net revenues $ 45,745 $ 17,793 $ 63,538 $ 61,087 $ 26,990 $ 88,077 Timing of Revenue Recognition Three Months Ended Nine Months Ended September 29, 2018 September 29, 2018 (In thousands) TFE Photonics Total TFE Photonics Total Products transferred at a point in time $ 12,108 $ 746 $ 12,854 $ 45,745 $ 1,463 $ 47,208 Products and services transferred over time — 6,612 6,612 — 16,330 16,330 $ 12,108 $ 7,358 $ 19,466 $ 45,745 $ 17,793 $ 63,538
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 nine months ended September 29, 2018: September 29, 2018 December 30, 2017 Nine Months Change (In thousands) TFE: Contract assets: Accounts receivable, unbilled $ 517 $ 1,368 $ (851 ) Contract liabilities: Deferred revenue $ 6,200 $ 5,190 $ 1,010 Customer advances 11,066 10,204 862 $ 17,266 $ 15,394 $ 1,872 Photonics: Contract assets: Accounts receivable, unbilled $ 1,476 $ 1,346 $ 130 Retainage 145 281 (136 ) $ 1,621 $ 1,627 $ (6 ) Contract liabilities: Deferred revenue $ 1,317 $ 97 $ 1,220 Customer advances 550 822 (272 ) $ 1,867 $ 919 $ 948

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 29, 2018
Summary of Inventories	Inventories are stated at the lower of average cost or market and consist of the following: September 29, December 30, 2018 2017 (In thousands) Raw materials $ 14,746 $ 19,881 Work-in-progress 15,493 9,433 Finished goods 4,440 4,478 $ 34,679 $ 33,792

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	9 Months Ended
	Sep. 29, 2018
Effect of Recording Equity-Based Compensation	The effect of recording equity-based compensation for the three and nine months ended September 29, 2018 and September 30, 2017 was as follows: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Equity-based compensation by type of award: Stock options $ 213 $ 350 $ 563 $ 808 RSUs 309 731 945 1,943 ESPP awards 330 67 946 261 Total equity-based compensation $ 852 $ 1,148 $ 2,454 $ 3,012
Summary of Option Activity	A summary of the options activity is as follows: Shares Weighted-Average Exercise Price Options outstanding at December 30, 2017 2,925,861 $ 7.62 Options granted 421,125 $ 5.13 Options cancelled and forfeited (936,428 ) $ 9.31 Options exercised (321,190 ) $ 4.87 Options outstanding at September 29, 2018 2,089,368 $ 6.78 Options exercisable at September 29, 2018 1,331,565 $ 6.60
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 Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 Stock Options: Weighted-average fair value of grants per share $ 1.81 $ 3.89 $ 1.98 $ 4.54 Expected volatility 44.10 % 42.10 % 43.83 % 40.54 % Risk-free interest rate 2.87 % 1.84 % 2.58 % 1.77 % Expected term of options (in years) 3.90 4.08 4.41 4.10 Dividend yield None None None None Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 Stock Purchase Rights: Weighted-average fair value of grants per share $ 1.87 $ 2.76 $ 2.24 $ 2.75 Expected volatility 50.64 % 48.59 % 47.64 % 43.51 % Risk-free interest rate 2.58 % 1.36 % 2.01 % 1.22 % Expected term of purchase rights (in years) 1.58 0.50 1.33 0.65 Dividend yield None None 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 217,917 $ 5.07 Vested (425,956 ) $ 7.15 Cancelled and forfeited (98,737 ) $ 8.74 Non-vested 462,675 $ 6.98

Purchased Intangible Assets (Ta

Purchased Intangible Assets (Tables)	9 Months Ended
	Sep. 29, 2018
Details of Finite-lived Intangible Assets by Segment	Details of finite-lived intangible assets by segment as of September 29, 2018 are as follows. September 29, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount (In thousands) TFE $ 7,172 $ (6,220 ) $ 952 Photonics 1,215 (1,125 ) 90 $ 8,387 $ (7,345 ) $ 1,042
Future Amortization Expense	As of September 29, 2018, future amortization expense is expected to be as follows. (In thousands) 2018 $ 154 2019 615 2020 273 $ 1,042

Acquisition-Related Contingen_2

Acquisition-Related Contingent Consideration (Tables)	9 Months Ended
	Sep. 29, 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 and nine month periods ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Opening balance $ 370 $ 859 $ 362 $ 759 Changes in fair value — (283 ) 8 (181 ) Cash payments made — (172 ) — (174 ) Closing balance $ 370 $ 404 $ 370 $ 404
Balance Sheet Classification of Contingent Consideration Liability	The following table displays the balance sheet classification of the contingent consideration liability account at September 29, 2018 and at December 30, 2017: September 29, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 370 $ 103 Other long-term liabilities — 259 Total acquisition-related contingent consideration $ 370 $ 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 September 29, 2018. Significant increases or decreases in any of these inputs in isolation would result in a significantly lower or higher fair value measurement. Quantitative Information about Level 3 Fair Value Measurements at September 29, 2018 Fair Value Valuation Technique Unobservable Input Weighted Average (In thousands, except for percentages) Revenue Earnout $ 370 Discounted cash flow Weighted average cost of capital 12.1 %

Warranty (Tables)

Warranty (Tables)	9 Months Ended
	Sep. 29, 2018
Activity in Warranty Provision Account	The following table displays the activity in the warranty provision account for the three and nine months ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Opening balance $ 911 $ 1,220 $ 994 $ 1,007 Expenditures incurred under warranties (51 ) (360 ) (469 ) (640 ) Accruals for product warranties issued during the reporting period 68 169 347 675 Adjustments to previously existing warranty accruals (139 ) 106 (83 ) 93 Closing balance $ 789 $ 1,135 $ 789 $ 1,135 The following table displays the balance sheet classification of the warranty provision account at September 29, 2018 and at December 30, 2017: September 29, December 30, 2018 2017 (In thousands) Other accrued liabilities $ 622 $ 757 Other long-term liabilities 167 237 Total warranty provision $ 789 $ 994

Cash, Cash Equivalents and In_2

Cash, Cash Equivalents and Investments (Tables)	9 Months Ended
	Sep. 29, 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: September 29, 2018 Amortized Cost Unrealized Holding Gains Unrealized Holding Losses Fair Value (In thousands) Cash and cash equivalents: Cash $ 15,408 $ — $ — $ 15,408 Money market funds 5,536 — — 5,536 U.S. treasury and agency securities 809 — — 809 Total cash and cash equivalents $ 21,753 $ — $ — $ 21,753 Short-term investments: Certificates of deposit $ 5,797 $ 2 $ — $ 5,799 Commercial paper 2,726 — — 2,726 Corporate bonds and medium-term notes 3,054 — 12 3,042 Municipal bonds 499 — 2 497 U.S. treasury and agency securities 5,123 — 12 5,111 Total short-term investments $ 17,199 $ 2 $ 26 $ 17,175 Long-term investments: Certificates of deposit $ 500 $ — $ — $ 500 Corporate bonds and medium-term notes 3,679 1 6 3,674 U.S. treasury and agency securities 999 — 9 990 Total long-term investments $ 5,178 $ 1 $ 15 $ 5,164 Total cash, cash equivalents, and investments $ 44,130 $ 3 $ 41 $ 44,092 December 30, 2017 Amortized Cost Unrealized Holding Gains Unrealized Holding Losses 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
Contractual Maturities of Available-for-Sale Securities	The contractual maturities of available-for-sale September 29, 2018 Amortized Cost Fair Value (In thousands) Due in one year or less $ 23,544 $ 23,520 Due after one through two years 5,178 5,164 $ 28,722 $ 28,684
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 September 29, 2018. September 29, 2018 In Loss Position for Less than 12 Months In Loss Position for Greater than 12 Months Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (In thousands) Corporate bonds and medium-term notes $ 2,925 $ 10 $ 1,950 $ 8 Municipal bonds 497 2 — — U.S. treasury and agency securities 3,018 10 2,587 11 $ 6,440 $ 22 $ 4,537 $ 19
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 September 29, 2018 Total Level 1 Level 2 (In thousands) Recurring fair value measurements: Available-for-sale Money market funds $ 5,536 $ 5,536 $ — U.S. treasury and agency securities 6,910 5,913 997 Certificates of deposit 6,299 — 6,299 Commercial paper 2,726 — 2,726 Corporate bonds and medium-term notes 6,716 — 6,716 Municipal bonds 497 — 497 Total recurring fair value measurements $ 28,684 $ 11,449 $ 17,235

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 29, 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 September 29, 2018 and December 30, 2017: Notional Amounts Derivative Liabilities Derivative Instrument September 29 2018 December 30, 2017 September 29, 2018 December 30, 2017 Balance Sheet Line Fair Value Balance Sheet Line Fair Value (in thousands) Undesignated Hedges: Forward Foreign Currency Contracts $ 1,470 $ 1,276 (a) $ 7 (a) $ 5 Total Hedges $ 1,470 $ 1,276 $ 7 $ 5 (a) Other accrued liabilities

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 29, 2018
Schedule of Changes in Stockholders' Equity	The changes in stockholders’ equity by component for the three and nine months ended September 29, 2018 and September 30, 2017, are as follows (in thousands): Three months ended September 29, 2018 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at June 30, 2018 $ 180,449 $ (28,489 ) $ 444 $ (73,818 ) $ 78,586 Common stock issued under employee plans 1,076 — — — 1,076 Equity-based compensation expense 852 — — — 852 Net loss — — — (1,099 ) (1,099 ) Other comprehensive loss — — (73 ) — (73 ) Balance at September 29, 2018 $ 182,377 $ (28,489 ) $ 371 $ (74,917 ) $ 79,342 Nine months ended September 29, 2018 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at December 30, 2017 $ 177,543 $ (28,489 ) $ 490 $ (66,881 ) $ 82,663 Cumulative effect of accounting change — — — (1,634 ) (1,634 ) Common stock issued under employee plans 2,380 — — — 2,380 Equity-based compensation expense 2,454 — — — 2,454 Net loss — — — (6,402 ) (6,402 ) Other comprehensive loss — — (119 ) — (119 ) Balance at September 29, 2018 $ 182,377 $ (28,489 ) $ 371 $ (74,917 ) $ 79,342 Three months ended September 30, 2017 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at July 1, 2017 $ 174,267 $ (28,489 ) $ 399 $ (68,070 ) $ 78,107 Common stock issued under employee plans 889 — — — 889 Equity-based compensation expense 1,148 — — — 1,148 Net income — — — 1,230 1,230 Other comprehensive income — — 44 — 44 Balance at September 30, 2017 $ 176,304 $ (28,489 ) $ 443 $ (66,840 ) $ 81,418 Nine months ended September 30, 2017 Common Stock and Accumulated Additional Other Total Paid-in Treasury Comprehensive Accumulated Stockholders’ Capital Stock Income Deficit Equity Balance at December 31, 2016 $ 171,335 $ (28,489 ) $ 321 $ (69,901 ) $ 73,266 Cumulative effect of accounting change 1,098 — — (1,098 ) — Common stock issued under employee plans 356 — — — 356 Grant of RSUs to settle accrued bonus 605 — — — 605 Equity-based compensation expense 2,910 — — — 2,910 Net income — — — 4,159 4,159 Other comprehensive income — — 122 — 122 Balance at September 30, 2017 $ 176,304 $ (28,489 ) $ 443 $ (66,840 ) $ 81,418
Changes in Accumulated Other Comprehensive Income by Component	The changes in accumulated other comprehensive income by component for the three and nine months ended September 29, 2018 and September 30, 2017, are as follows. Three Months Ended Nine Months Ended September 29, 2018 Foreign currency Unrealized available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 495 $ (51 ) $ 444 $ 535 $ (45 ) $ 490 Other comprehensive income before reclassification (86 ) 13 (73 ) (126 ) 7 (119 ) Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income (86 ) 13 (73 ) (126 ) 7 (119 ) Ending balance $ 409 $ (38 ) $ 371 $ 409 $ (38 ) $ 371 Three Months Ended Nine Months Ended September 30, 2017 Foreign currency Unrealized holding losses on available-for-sale Total Foreign Unrealized available-for-sale Total (In thousands) Beginning balance $ 418 $ (19 ) $ 399 $ 343 $ (22 ) $ 321 Other comprehensive income (loss) before reclassification 39 5 44 114 8 122 Amounts reclassified from other comprehensive income — — — — — — Net current-period other comprehensive income (loss) 39 5 44 114 8 122 Ending balance $ 457 $ (14 ) $ 443 $ 457 $ (14 ) $ 443

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 29, 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 for the three and nine months ended September 29, 2018 and September 30, 2017: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands, except per share amounts) Net income (loss) $ (1,099 ) $ 1,230 $ (6,402 ) $ 4,159 Weighted-average shares – basic 22,719 21,714 22,429 21,475 Effect of dilutive potential common shares — 1,256 — 1,514 Weighted-average shares – diluted 22,719 22,970 22,429 22,989 Net income (loss) per share – basic $ (0.05 ) $ 0.06 $ (0.29 ) $ 0.19 Net income (loss) per share –diluted $ (0.05 ) $ 0.05 $ (0.29 ) $ 0.18
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: Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) Stock options to purchase common stock 2,089 826 2,089 834 RSUs 463 — 463 — Employee stock purchase plan 800 — 800 —

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 29, 2018
Information for Each Reportable Segment	Information for each reportable segment for the three and nine months ended September 29, 2018 and September 30, 2017 is as follows: Net Revenues Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) TFE $ 12,108 $ 17,177 $ 45,745 $ 61,087 Photonics 7,358 9,549 17,793 26,990 Total segment net revenues $ 19,466 $ 26,726 $ 63,538 $ 88,077 Operating Income (Loss) Three Months Ended Nine Months Ended September 29, 2018 September 30, 2017 September 29, 2018 September 30, 2017 (In thousands) TFE $ (907 ) $ 1,213 $ (2,197 ) $ 4,821 Photonics 688 1,417 (966 ) 3,646 Total segment operating income (loss) (219 ) 2,630 (3,163 ) 8,467 Unallocated costs (874 ) (1,362 ) (2,986 ) (3,768 ) Income (loss) from operations (1,093 ) 1,268 (6,149 ) 4,699 Interest income and other income (expense), net 186 28 464 265 Income (loss) before income taxes $ (907 ) $ 1,296 $ (5,685 ) $ 4,964
Assets for Each Reportable Segment	Total assets for each reportable segment as of September 29, 2018 and December 30, 2017 are as follows: Assets September 29, 2018 December 30, 2017 (In thousands) TFE $ 48,961 $ 52,156 Photonics 17,007 16,364 Total segment assets 65,968 68,520 Cash, cash equivalents and investments 44,092 42,488 Restricted cash 1,569 1,000 Deferred income taxes 4 4 Other current assets 1,201 1,001 Common property, plant and equipment 1,060 1,267 Other assets 723 743 Consolidated total assets $ 114,617 $ 115,023

Restructuring Charges (Tables)

Restructuring Charges (Tables)	9 Months Ended
	Sep. 29, 2018
Changes in Restructuring Reserves	The changes in restructuring reserves associated with the Plan for the nine months ended September 29, 2018 are as follows. Nine Months Ended September 29, 2018 Severance and employee- related costs (In thousands) Beginning balance $ — Provision for restructuring reserves 95 Cash payments made (95 ) Ending balance $ —

Description of Business and B_2

Description of Business and Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 29, 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	Sep. 29, 2018	Dec. 31, 2017	Dec. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	$ 10,995		$ 7,688
Accumulated deficit	(74,917)		$ (66,881)
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	9,697	$ 9,322
Accumulated deficit	(73,619)	(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	1,298	1,634
Accumulated deficit	$ (1,298)	$ (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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Systems and components revenues	$ 19,466	$ 26,726	$ 63,538	$ 88,077
Gross profit	7,486	11,298	22,122	35,816
Income (loss) from operations	(1,093)	1,268	(6,149)	4,699
Income (loss) before income taxes	(907)	1,296	(5,685)	4,964
Net loss	(1,099)	1,230	(6,402)	4,159
Systems and components
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Systems and components revenues	17,140	$ 24,537	55,947	$ 82,822
Calculated under Revenue Guidance in Effect before Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Systems and components revenues	19,359		63,202
Gross profit	7,379		21,786
Income (loss) from operations	(1,200)		(6,485)
Income (loss) before income taxes	(1,014)		(6,021)
Net loss	(1,206)		(6,738)
Calculated under Revenue Guidance in Effect before Topic 606 | Systems and components
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Systems and components revenues	17,033		55,611
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]
Systems and components revenues	107		336
Gross profit	107		336
Income (loss) from operations	107		336
Income (loss) before income taxes	107		336
Net loss	107		336
Accounting Standards Update 2014-09 | Difference Between Revenue Guidance in Effect Before and After Topic 606 | Systems and components
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Systems and components revenues	$ 107		$ 336

Impact of New Revenue Standard

Impact of New Revenue Standard on Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Jun. 30, 2018	Dec. 31, 2017	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	$ 10,995			$ 7,688
Total current liabilities	32,839			29,481
Accumulated deficit	(74,917)			(66,881)
Total stockholders' equity	79,342	$ 78,586		$ 82,663	$ 81,418	$ 78,107	$ 73,266
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other accrued liabilities	9,697		$ 9,322
Total current liabilities	31,541
Accumulated deficit	(73,619)		(68,515)
Total stockholders' equity	80,640
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	1,298		1,634
Total current liabilities	1,298
Accumulated deficit	(1,298)		$ (1,634)
Total stockholders' equity	$ (1,298)

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total net revenues	$ 19,466	$ 26,726	$ 63,538	$ 88,077
TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,108	17,177	45,745	61,087
TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	9,527	15,895	39,145	57,284
TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues	2,581	1,282	6,600	3,803
Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	7,358	9,549	17,793	26,990
HDD | TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,057	16,902	45,651	38,678
HDD | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	9,476	15,620	39,090	34,875
HDD | TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues	2,581	1,282	6,561	3,803
DCP | TFE
Disaggregation of Revenue [Line Items]
Total net revenues			1	13,138
DCP | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues			1	13,138
PV | TFE
Disaggregation of Revenue [Line Items]
Total net revenues	51	275	93	9,271
PV | TFE | Systems, Upgrades and Spare Parts
Disaggregation of Revenue [Line Items]
Total net revenues	51	275	54	9,271
PV | TFE | Field Service
Disaggregation of Revenue [Line Items]
Total net revenues			39
Military Products | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	4,202	6,989	8,601	20,908
Commercial Products | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	84	38	138	100
Repair and Other Services | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	746	333	1,463	727
Product | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	5,032	7,360	10,202	21,735
FFP | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	494	728	1,726	2,724
CPFF | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	1,819	1,446	5,829	2,516
Times and Materials | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	13	15	36	15
Technology Development | Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	$ 2,326	$ 2,189	$ 7,591	$ 5,255

Revenue - Primary Geographical

Revenue - Primary Geographical Markets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total net revenues	$ 19,466	$ 26,726	$ 63,538	$ 88,077
Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	12,854		47,208
Products and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total net revenues	6,612		16,330
United States
Disaggregation of Revenue [Line Items]
Total net revenues	7,155	10,294	20,177	29,879
Asia
Disaggregation of Revenue [Line Items]
Total net revenues	11,821	15,807	42,227	57,062
Europe
Disaggregation of Revenue [Line Items]
Total net revenues	457	94	937	605
Rest of World
Disaggregation of Revenue [Line Items]
Total net revenues	33	531	197	531
TFE
Disaggregation of Revenue [Line Items]
Total net revenues	12,108	17,177	45,745	61,087
TFE | Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	12,108		45,745
TFE | United States
Disaggregation of Revenue [Line Items]
Total net revenues	287	1,370	3,549	4,033
TFE | Asia
Disaggregation of Revenue [Line Items]
Total net revenues	11,821	15,807	42,196	57,054
Photonics
Disaggregation of Revenue [Line Items]
Total net revenues	7,358	9,549	17,793	26,990
Photonics | Products Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total net revenues	746		1,463
Photonics | Products and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total net revenues	6,612		16,330
Photonics | United States
Disaggregation of Revenue [Line Items]
Total net revenues	6,868	8,924	16,628	25,846
Photonics | Asia
Disaggregation of Revenue [Line Items]
Total net revenues			31	8
Photonics | Europe
Disaggregation of Revenue [Line Items]
Total net revenues	457	94	937	605
Photonics | Rest of World
Disaggregation of Revenue [Line Items]
Total net revenues	$ 33	$ 531	$ 197	$ 531

Revenue - Changes in Contract A

Revenue - Changes in Contract Assets and Contract Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Dec. 30, 2017
TFE
Revenue From Contract With Customers [Line Items]
Contract liabilities	$ 17,266	$ 15,394
Contract liabilities:
Change in contract liabilities	1,872
TFE | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Contract assets	517	1,368
Contract liabilities:
Change in contract assets	(851)
TFE | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract liabilities	6,200	5,190
Contract liabilities:
Change in contract liabilities	1,010
TFE | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract liabilities	11,066	10,204
Contract liabilities:
Change in contract liabilities	862
Photonics
Revenue From Contract With Customers [Line Items]
Contract assets	1,621	1,627
Contract liabilities	1,867	919
Contract liabilities:
Change in contract assets	(6)
Change in contract liabilities	948
Photonics | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Contract assets	1,476	1,346
Contract liabilities:
Change in contract assets	130
Photonics | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract liabilities	1,317	97
Contract liabilities:
Change in contract liabilities	1,220
Photonics | Retainage
Revenue From Contract With Customers [Line Items]
Contract assets	145	281
Contract liabilities:
Change in contract assets	(136)
Photonics | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract liabilities	550	$ 822
Contract liabilities:
Change in contract liabilities	$ (272)

Revenue - Additional Informatio

Revenue - Additional Information (Detail)	9 Months Ended
	Sep. 29, 2018USD ($)Installment	Dec. 30, 2017USD ($)
Revenue From Contract With Customers [Line Items]
Revenue remaining performance obligation	$ 72,200,000
Revenue performance obligation, description of timing	We expect to recognize approximately 44% of our remaining performance obligations as revenue in 2018, 52% in 2019 and 4% in 2020.
TFE
Revenue From Contract With Customers [Line Items]
Contract liabilities	$ 17,266,000	$ 15,394,000
Revenue remaining performance obligation	$ 63,600,000
TFE | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Number of installments | Installment	3
Change in contract assets	$ (851,000)
TFE | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	6,600,000
Contract liabilities	11,066,000	10,204,000
TFE | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	69,000
Contract liabilities	6,200,000	5,190,000
Photonics
Revenue From Contract With Customers [Line Items]
Change in contract assets	(6,000)
Contract liabilities	1,867,000	919,000
Revenue remaining performance obligation	8,600,000
Photonics | Accounts Receivable, Unbilled
Revenue From Contract With Customers [Line Items]
Change in contract assets	130,000
Photonics | Customer Advances
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	536,000
Contract liabilities	550,000	822,000
Photonics | Deferred Revenue
Revenue From Contract With Customers [Line Items]
Contract with customer liability revenue recognized	324,000
Contract liabilities	$ 1,317,000	$ 97,000

Inventories Stated at Lower of

Inventories Stated at Lower of Average Cost or Market (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Inventory [Line Items]
Raw materials	$ 14,746	$ 19,881
Work-in-progress	15,493	9,433
Finished goods	4,440	4,478
Inventories	$ 34,679	$ 33,792

Equity-Based Compensation - Add

Equity-Based Compensation - Additional information (Detail)	1 Months Ended	9 Months Ended
	Feb. 28, 2017Employee$ / sharesshares	Sep. 29, 2018shares	Sep. 30, 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		410,522
RSU conversion ratio		100.00%
Annual incentive plan stock awards granted		421,125
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
Restricted Stock Units (RSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		3 years
Restricted Stock Units (RSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		4 years

Effect of Recording Equity-Base

Effect of Recording Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 852	$ 1,148	$ 2,454	$ 3,012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	213	350	563	808
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	309	731	945	1,943
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 330	$ 67	$ 946	$ 261

Option Activity and Changes (De

Option Activity and Changes (Detail)	9 Months Ended
	Sep. 29, 2018$ / sharesshares
Shares
Options outstanding at December 30, 2017 | shares	2,925,861
Options granted | shares	421,125
Options cancelled and forfeited | shares	(936,428)
Options exercised | shares	(321,190)
Options outstanding at September 29, 2018 | shares	2,089,368
Options exercisable at September 29, 2018 | shares	1,331,565
Weighted Average Exercise Price
Options outstanding at December 30, 2017 | $ / shares	$ 7.62
Options granted | $ / shares	5.13
Options cancelled and forfeited | $ / shares	9.31
Options exercised | $ / shares	4.87
Options outstanding at September 29, 2018 | $ / shares	6.78
Options exercisable at September 29, 2018 | $ / shares	$ 6.60

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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Stock Options
Weighted-average assumptions
Weighted-average fair value of grants per share	$ 1.81	$ 3.89	$ 1.98	$ 4.54
Expected volatility	44.10%	42.10%	43.83%	40.54%
Risk-free interest rate	2.87%	1.84%	2.58%	1.77%
Expected term of options (in years)	3 years 10 months 24 days	4 years 29 days	4 years 4 months 28 days	4 years 1 month 6 days
Dividend yield	0.00%	0.00%	0.00%	0.00%
Stock Purchase Rights
Weighted-average assumptions
Weighted-average fair value of grants per share	$ 1.87	$ 2.76	$ 2.24	$ 2.75
Expected volatility	50.64%	48.59%	47.64%	43.51%
Risk-free interest rate	2.58%	1.36%	2.01%	1.22%
Expected term of options (in years)	1 year 6 months 29 days	6 months	1 year 3 months 29 days	7 months 24 days
Dividend yield	0.00%	0.00%	0.00%	0.00%

Summary of Restricted Stock Uni

Summary of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs)	9 Months Ended
	Sep. 29, 2018$ / sharesshares
Shares
Non-vested RSUs at December 30, 2017 | shares	769,451
Granted | shares	217,917
Vested | shares	(425,956)
Cancelled and forfeited | shares	(98,737)
Non-vested RSUs at September 29, 2018 | shares	462,675
Weighted Average Grant Date Fair Value
Non-vested RSUs at December 30, 2017 | $ / shares	$ 7.84
Granted | $ / shares	5.07
Vested | $ / shares	7.15
Cancelled and forfeited | $ / shares	8.74
Non-vested RSUs at September 29, 2018 | $ / shares	$ 6.98

Details of Finite-lived Intangi

Details of Finite-lived Intangible Assets by Segment (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 8,387
Accumulated Amortization	(7,345)	$ (6,884)
Finite Lived, Net Carrying Amount	1,042	$ 1,503
TFE
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	7,172
Accumulated Amortization	(6,220)
Finite Lived, Net Carrying Amount	952
Photonics
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	1,215
Accumulated Amortization	(1,125)
Finite Lived, Net Carrying Amount	$ 90

Purchased Intangible Assets - A

Purchased Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 29, 2018	Sep. 29, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense of finite-lived intangibles	$ 154,000	$ 461,000

Future Amortization Expense (De

Future Amortization Expense (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
2,018	$ 154
2,019	615
2,020	273
Finite Lived, Net Carrying Amount	$ 1,042	$ 1,503

Acquisition-Related Contingen_3

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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition, Contingent Consideration [Line Items]
Opening balance	$ 370	$ 859	$ 362	$ 759
Changes in fair value	0	(283)	8	(181)
Cash payments made		(172)		(174)
Closing balance	$ 370	$ 404	$ 370	$ 404

Balance Sheet Classification of

Balance Sheet Classification of Contingent Consideration Liability (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Business Combination, Transactions [Line Items]
Other accrued liabilities	$ 370	$ 362
Other accrued liabilities
Business Combination, Transactions [Line Items]
Other accrued liabilities	$ 370	103
Other long-term liabilities
Business Combination, Transactions [Line Items]
Other accrued liabilities		$ 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	9 Months Ended
	Sep. 29, 2018	Dec. 30, 2017
Business Acquisition, Contingent Consideration [Line Items]
Fair Value	$ 370	$ 362
Fair Value, Inputs, Level 3 | Revenue Earnout
Business Acquisition, Contingent Consideration [Line Items]
Valuation technique	Discounted cash flow
Fair Value	$ 370
Fair Value, Inputs, Level 3 | Revenue Earnout | Weighted Average | Measurement Input, Discount Rate
Business Acquisition, Contingent Consideration [Line Items]
Weighted average cost of capital	12.10%

Warranty - Additional Informati

Warranty - Additional Information (Detail)	9 Months Ended
	Sep. 29, 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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Accrued Warranty [Line Items]
Opening balance	$ 911	$ 1,220	$ 994	$ 1,007
Expenditures incurred under warranties	(51)	(360)	(469)	(640)
Accruals for product warranties issued during the reporting period	68	169	347	675
Adjustments to previously existing warranty accruals	(139)	106	(83)	93
Closing balance	$ 789	$ 1,135	$ 789	$ 1,135

Balance Sheet Classification _2

Balance Sheet Classification of Warranty Provision Account (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Jun. 30, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Jan. 01, 2017
Product Warranty [Line Items]
Other accrued liabilities	$ 622		$ 757
Other long-term liabilities	167		237
Total warranty provision	$ 789	$ 911	$ 994	$ 1,135	$ 1,220	$ 1,007

Guarantees - Additional Informa

Guarantees - Additional Information (Detail) $ in Millions	Sep. 29, 2018USD ($)
Guarantor Obligations [Line Items]
Letters of credit and bank guarantees outstanding, amount	$ 1.6
Letters of credit and bank guarantees collateralized by restricted cash	$ 1.6

Cash, Cash Equivalents and Shor

Cash, Cash Equivalents and Short-Term Investments and Long-Term Investments (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 44,130	$ 42,533
Unrealized Holdings Gains	3	1
Unrealized Holdings Losses	41	46
Fair Value	44,092	42,488
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,753	19,941
Fair Value	21,753	19,941
Cash and Cash Equivalents | U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	809
Fair Value	809
Cash and Cash Equivalents | Cash
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,408	13,195
Fair Value	15,408	13,195
Cash and Cash Equivalents | Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,536	6,746
Fair Value	5,536	6,746
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,199	15,710
Unrealized Holdings Gains	2	1
Unrealized Holdings Losses	26	13
Fair Value	17,175	15,698
Short-term Investments | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	499	500
Unrealized Holdings Losses	2	3
Fair Value	497	497
Short-term Investments | U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,123	4,917
Unrealized Holdings Losses	12	4
Fair Value	5,111	4,913
Short-term Investments | Corporate bonds and medium-term notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,054	4,502
Unrealized Holdings Losses	12	5
Fair Value	3,042	4,497
Short-term Investments | Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,797	2,500
Unrealized Holdings Gains	2	1
Unrealized Holdings Losses		1
Fair Value	5,799	2,500
Short-term Investments | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,726	3,291
Fair Value	2,726	3,291
Other Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,178	6,882
Unrealized Holdings Gains	1
Unrealized Holdings Losses	15	33
Fair Value	5,164	6,849
Other Long-term Investments | Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		500
Fair Value		500
Other Long-term Investments | U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	999	1,998
Unrealized Holdings Losses	9	12
Fair Value	990	1,986
Other Long-term Investments | Corporate bonds and medium-term notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,679	4,384
Unrealized Holdings Gains	1
Unrealized Holdings Losses	6	21
Fair Value	3,674	$ 4,363
Other Long-term Investments | Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	500
Fair Value	$ 500

Contractual Maturities of Avail

Contractual Maturities of Available-For-Sale Securities (Detail) $ in Thousands	Sep. 29, 2018USD ($)
Amortized Cost
Amortized Cost, Due in one year or less	$ 23,544
Amortized Cost, Due after one through two years	5,178
Amortized Cost	28,722
Fair Value
Fair Value, Due in one year or less	23,520
Fair Value, Due after one through two years	5,164
Fair Value	$ 28,684

Fair Market Value of Investment

Fair Market Value of Investments with Unrealized Losses Not Deemed to be Other-Than Temporarily Impaired (Detail) $ in Thousands	Sep. 29, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	$ 6,440
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	22
Unrealized Loss Position, Greater than 12 Months, Fair Value	4,537
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	19
Corporate bonds and medium-term notes
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	2,925
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	10
Unrealized Loss Position, Greater than 12 Months, Fair Value	1,950
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	8
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	497
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	2
U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position, Less than 12 Months, Fair Value	3,018
Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	10
Unrealized Loss Position, Greater than 12 Months, Fair Value	2,587
Unrealized Loss Position, Greater than 12 Months, Gross Unrealized Losses	$ 11

Fair Value Hierarchy of Availab

Fair Value Hierarchy of Available-for-Sale Securities Measured at Fair Value on Recurring Basis (Detail) $ in Thousands	Sep. 29, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	$ 28,684
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	28,684
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	5,536
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	6,299
Fair Value, Measurements, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	2,726
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	6,910
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	6,716
Fair Value, Measurements, Recurring | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total recurring fair value measurements	497
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	11,449
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	5,536
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	5,913
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	17,235
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	6,299
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	2,726
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	997
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	6,716
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	$ 497

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 29, 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		Sep. 29, 2018	Dec. 30, 2017
Derivatives, Fair Value [Line Items]
Notional Amounts		$ 1,470	$ 1,276
Derivative Liabilities		7	5
Forward foreign currency contracts
Derivatives, Fair Value [Line Items]
Notional Amounts		1,470	1,276
Derivative Liabilities	[1]	$ 7	$ 5
[1]	Other accrued liabilities

Equity - Schedule of Changes in

Equity - Schedule of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Beginning balance	$ 78,586	$ 78,107	$ 82,663	$ 73,266
Cumulative effect of accounting change	(1,634)		(1,634)
Common stock issued under employee plans	1,076	889	2,380	356
Grant of RSUs to settle accrued bonus				605
Equity-based compensation expense	852	1,148	2,454	2,910
Net income	(1,099)	1,230	(6,402)	4,159
Other comprehensive income (loss)	(73)	44	(119)	122
Ending balance	79,342	81,418	79,342	81,418
Common Stock and Additional Paid-in Capital [Member]
Beginning balance	180,449	174,267	177,543	171,335
Cumulative effect of accounting change		1,098		1,098
Common stock issued under employee plans	1,076	889	2,380	356
Grant of RSUs to settle accrued bonus				605
Equity-based compensation expense	852	1,148	2,454	2,910
Ending balance	182,377	176,304	182,377	176,304
Treasury Stock
Beginning balance	(28,489)	(28,489)	(28,489)	(28,489)
Ending balance	(28,489)	(28,489)	(28,489)	(28,489)
Accumulated Other Comprehensive Income
Beginning balance	444	399	490	321
Other comprehensive income (loss)	(73)	44	(119)	122
Ending balance	371	443	371	443
Accumulated Deficit
Beginning balance	(73,818)	(68,070)	(66,881)	(69,901)
Cumulative effect of accounting change	(1,634)	(1,098)	(1,634)	(1,098)
Net income	(1,099)	1,230	(6,402)	4,159
Ending balance	$ (74,917)	$ (66,840)	$ (74,917)	$ (66,840)

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 78,586	$ 78,107	$ 82,663	$ 73,266
Other comprehensive income (loss) before reclassification	(73)	44	(119)	122
Amounts reclassified from other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax	(73)	44	(119)	122
Ending balance	79,342	81,418	79,342	81,418
Foreign currency
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	495	418	535	343
Other comprehensive income (loss) before reclassification	(86)	39	(126)	114
Amounts reclassified from other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax	(86)	39	(126)	114
Ending balance	409	457	409	457
Unrealized holding losses on available-for-sale investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(51)	(19)	(45)	(22)
Other comprehensive income (loss) before reclassification	13	5	7	8
Amounts reclassified from other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax	13	5	7	8
Ending balance	(38)	(14)	(38)	(14)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	444	399	490	321
Amounts reclassified from other comprehensive income	0	0	0	0
Ending balance	$ 371	$ 443	$ 371	$ 443

Equity - Additional Information

Equity - Additional Information (Detail) - USD ($) shares in Millions	Aug. 15, 2018	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Nov. 21, 2013
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized amount	$ 40,000,000					$ 30,000,000
Stock repurchase remained available for future stock repurchase		$ 11,500,000		$ 11,500,000
Stock repurchased		0	0	0	0
Increase in stock repurchase program	$ 10,000,000

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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items]
Net income (loss)	$ (1,099)	$ 1,230	$ (6,402)	$ 4,159
Weighted-average shares - basic	22,719	21,714	22,429	21,475
Effect of dilutive potential common shares		1,256		1,514
Weighted-average shares - diluted	22,719	22,970	22,429	22,989
Net income (loss) per share - basic	$ (0.05)	$ 0.06	$ (0.29)	$ 0.19
Net income (loss) per share -diluted	$ (0.05)	$ 0.05	$ (0.29)	$ 0.18

Antidilutive Securities Exclude

Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 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	2,089	826	2,089	834
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	463		463
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	800		800

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 29, 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		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Total segment net revenues	$ 19,466	$ 26,726	$ 63,538	$ 88,077
Income (loss) from operations	(1,093)	1,268	(6,149)	4,699
Interest income and other income (expense), net	186	28	464	265
Income (loss) before income taxes	(907)	1,296	(5,685)	4,964
TFE
Segment Reporting Information [Line Items]
Total segment net revenues	12,108	17,177	45,745	61,087
Photonics
Segment Reporting Information [Line Items]
Total segment net revenues	7,358	9,549	17,793	26,990
Operating Segments
Segment Reporting Information [Line Items]
Income (loss) from operations	(219)	2,630	(3,163)	8,467
Operating Segments | TFE
Segment Reporting Information [Line Items]
Income (loss) from operations	(907)	1,213	(2,197)	4,821
Operating Segments | Photonics
Segment Reporting Information [Line Items]
Income (loss) from operations	688	1,417	(966)	3,646
Unallocated Amount to Segment
Segment Reporting Information [Line Items]
Unallocated costs	$ (874)	$ (1,362)	$ (2,986)	$ (3,768)

Assets for Each Reportable Segm

Assets for Each Reportable Segment (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Cash, cash equivalents and investments	$ 44,092	$ 42,488
Restricted cash	1,569	1,000
Deferred income taxes	4	4
Other current assets	1,201	1,001
Common property, plant and equipment	1,060	1,267
Other assets	723	743
Consolidated total assets	114,617	115,023
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	65,968	68,520
Operating Segments | TFE
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	48,961	52,156
Operating Segments | Photonics
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	$ 17,007	$ 16,364

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Income Taxes [Line Items]
Provision for income taxes	$ 192	$ 66	$ 717	$ 805
Corporate tax rate			21.00%		35.00%
Deposit for contested taxes and related interest	723		$ 723		$ 743
Audit Consideration | Foreign Tax Authority
Income Taxes [Line Items]
Provision for income taxes		$ 200		$ 200
Inland Revenue, Singapore (IRAS)
Income Taxes [Line Items]
Deposit for contested taxes and related interest	$ 723		$ 723		$ 743

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	9 Months Ended
	Sep. 29, 2018USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 0
Provision for restructuring reserves	95
Cash payments made	(95)
Ending balance	$ 0