10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2017

OR

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

For the transition period from              to

Commission file number: 000-13470

NANOMETRICS INCORPORATED

(Exact name of registrant as specified in its charter)

Delaware	94-2276314
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)
1550 Buckeye Drive Milpitas, California	95035
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (408) 545-6000

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

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

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

Large accelerated filer	☐		Accelerated filer	☒
Non-accelerated filer	☐	(Do not check if a smaller reporting company)	Smaller reporting company	☐
Emerging growth company	☐

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

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

As of October 31, 2017, there were 25,594,642 shares of common stock, $0.001 par value, issued and outstanding.

NANOMETRICS INCORPORATED

INDEX TO QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2017

PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016 (Unaudited)	3
	Condensed Consolidated Statements of Operations for the Three and Nine Month Periods Ended September 30, 2017and September 24, 2016 (Unaudited)	4
	Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Month Periods Ended September 30, 2017 and September 24, 2016 (Unaudited)	5
	Condensed Consolidated Statements of Cash Flows for the Nine Month Periods Ended September 30, 2017 and September 24, 2016 (Unaudited)	6
	Notes to Condensed Consolidated Financial Statements (Unaudited)	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	21
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	28
Item 4.	Controls and Procedures	30
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	33
Item 6.	Exhibits	34
Signatures		35

2

PART I — FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

NANOMETRICS INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands except share and per share amounts)

(Unaudited)

	September 30, 2017			December 31, 2016
ASSETS
Current assets:
Cash and cash equivalents	$	44,041		$	47,062
Marketable securities		96,316			82,899
Accounts receivable, net of allowances of $69 and $73, respectively		41,261			39,457
Inventories		55,020			38,837
Inventories-delivered systems		3,320			2,457
Prepaid expenses and other		9,910			5,667
Total current assets		249,868			216,379
Property, plant and equipment, net		42,317			44,226
Goodwill		10,099			8,940
Intangible assets, net		2,258			412
Deferred income tax assets		16,472			17,399
Other assets		389			474
Total assets	$	321,403		$	287,830
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	17,180		$	11,342
Accrued payroll and related expenses		10,260			12,656
Deferred revenue		7,229			9,168
Other current liabilities		7,704			8,047
Income taxes payable		1,689			813
Total current liabilities		44,062			42,026
Deferred revenue		1,551			816
Income taxes payable		907			841
Deferred tax liability		21			20
Other long-term liabilities		377			353
Total liabilities		46,918			44,056
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value; 3,000,000 shares authorized;    no shares issued or outstanding	—				—
Common stock, $0.001 par value, 47,000,000 shares authorized: 25,567,220    and 25,070,889, respectively, issued and outstanding		26			25
Additional paid-in capital		278,722			271,969
Accumulated deficit		(1,685	)		(22,174	)
Accumulated other comprehensive income (loss)		(2,578	)		(6,046	)
Total stockholders’ equity		274,485			243,774
Total liabilities and stockholders’ equity	$	321,403		$	287,830

See Notes to Condensed Consolidated Financial Statements

3

NANOMETRICS INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands except per share amounts)

(Unaudited)

	Three Months Ended						Nine Months Ended
	September 30, 2017			September 24, 2016			September 30, 2017			September 24, 2016
Net revenues:
Products	$	45,571		$	49,631		$	147,322		$	136,290
Service		11,104			9,083			33,094			25,680
Total net revenues		56,675			58,714			180,416			161,970
Costs of net revenues:
Cost of products		21,349			22,810			72,164			62,625
Cost of service		4,614			5,066			15,368			14,714
Amortization of intangible assets		52			434			156			1,311
Total costs of net revenues		26,015			28,310			87,688			78,650
Gross profit		30,660			30,404			92,728			83,320
Operating expenses:
Research and development		8,825			7,868			26,658			23,447
Selling		7,553			7,495			22,730			22,567
General and administrative		6,798			5,975			19,696			17,150
Amortization of intangible assets		—			-			-			24
Total operating expenses		23,176			21,338			69,084			63,188
Income from operations		7,484			9,066			23,644			20,132
Other income (expense):
Interest income		2			12			6			33
Interest expense		(25	)		(92	)		(84	)		(276	)
Other income, net		59			229			330			60
Total other income (expense), net		36			149			252			(183	)
Income before income taxes		7,520			9,215			23,896			19,949
Provision for income taxes		1,756			1,332			4,492			2,568
Net income	$	5,764		$	7,883		$	19,404		$	17,381
Net income per share:
Basic	$	0.23		$	0.32		$	0.77		$	0.71
Diluted	$	0.22		$	0.31		$	0.75		$	0.70
Weighted average shares used in per share calculation:
Basic		25,494			24,826			25,320			24,550
Diluted		25,932			25,282			25,933			24,979

See Notes to Condensed Consolidated Financial Statements

4

NANOMETRICS INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017			September 24, 2016
Net income	$	5,764	$	7,883	$	19,404		$	17,381
Other comprehensive income (loss):
Change in foreign currency translation adjustment		764		519		3,470			2,018
Net change on unrealized gains (losses) on available-for-sale investments		15		1		(2	)		73
Other comprehensive income:		779		520		3,468			2,091
Comprehensive income	$	6,543	$	8,403	$	22,872		$	19,472

See Notes to Condensed Consolidated Financial Statements

5

NANOMETRICS INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended
	September 30, 2017			September 24, 2016
Cash flows from operating activities:
Net income	$	19,404		$	17,381
Reconciliation of net income to net cash provided    by operating activities:
Depreciation and amortization		5,219			6,440
Stock-based compensation		6,775			5,432
Disposal of fixed assets		98			162
Inventory write-down		1,412			1,451
Deferred income taxes		2,153			(14	)
Changes in fair value of contingent payments to Zygo Corporation		—			158
Changes in assets and liabilities:
Accounts receivable		1,418			(986	)
Inventories		(16,828	)		6,652
Inventories-delivered systems		(864	)		(1,560	)
Prepaid expenses and other		(3,850	)		889
Accounts payable, accrued and other liabilities		709			(4,310	)
Deferred revenue		(1,204	)		3,825
Income taxes payable		942			(1,419	)
Net cash provided by operating activities		15,384			34,101
Cash flows from investing activities:
Payments to acquire certain assets		(2,000	)		—
Sales of marketable securities		28,624			2,093
Maturities of marketable securities		62,923			25,461
Purchases of marketable securities		(104,984	)		(63,840	)
Purchases of property, plant and equipment		(2,342	)		(3,349	)
Net cash used in investing activities		(17,779	)		(39,635	)
Cash flows from financing activities:
Payments to Zygo Corporation related to acquisition		—			(315	)
Proceeds from sale of shares under employee stock option    plans and purchase plan		3,678			5,984
Taxes paid on net issuance of stock awards		(3,838	)		(1,578	)
Net cash provided by (used in) financing activities		(160	)		4,091
Effect of exchange rate changes on cash and cash equivalents		(466	)		710
Net decrease in cash and cash equivalents		(3,021	)		(733	)
Cash and cash equivalents, beginning of period		47,062			38,154
Cash and cash equivalents, end of period	$	44,041		$	37,421
Supplemental disclosure of non-cash investing activities:
Transfer of inventory to property, plant and equipment, net	$	—		$	1,208
Transfer of property, plant and equipment to inventory, net	$	205		$	—

See Notes to Consolidated Financial Statements

6

NANOMETRICS INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1. Nature of Business and Basis of Presentation

Description of Business – Nanometrics Incorporated (“Nanometrics” or the “Company”) and its wholly-owned subsidiaries design, manufacture, market, sell and support optical critical dimension (“OCD”), thin film and overlay dimension metrology and inspection systems used primarily in the manufacturing of semiconductors, solar photovoltaics (“solar PV”) and high-brightness LEDs (“HB-LED”), as well as by customers in the silicon wafer and data storage industries. Nanometrics’ metrology systems precisely measure a wide range of film types deposited on substrates during manufacturing to control manufacturing processes and increase production yields in the fabrication of integrated circuits. The Company’s OCD technology is a patented critical dimension measurement technology that is used to precisely determine the dimensions on the semiconductor wafer that directly control the resulting performance of the integrated circuit devices. The thin film metrology systems use a broad spectrum of wavelengths, high-sensitivity optics, proprietary software, and patented technology to measure the thickness and uniformity of films deposited on silicon and other substrates as well as their chemical composition. The overlay metrology systems are used to measure the overlay accuracy of successive layers of semiconductor patterns on wafers in the photolithography process. Nanometrics’ inspection systems are used to find defects on patterned and unpatterned wafers at nearly every stage of the semiconductor production flow. The corporate headquarters of Nanometrics is located in Milpitas, California.

Basis of Presentation – The accompanying condensed consolidated financial statements (“financial statements”) have been prepared on a consistent basis with the audited consolidated financial statements as of December 31, 2016, and include all normal recurring adjustments necessary to fairly state the information set forth therein. All significant intercompany accounts and transactions have been eliminated in consolidation.

The financial statements have been prepared in accordance with the regulations of the United States Securities and Exchange Commission (“SEC”) for interim periods in accordance with S-X Article 10, and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The operating results for interim periods are not necessarily indicative of the operating results that may be expected for the entire year. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the fiscal year ended December 31, 2016, which were included in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2017.

Fiscal Period – The Company uses a 52/53 week fiscal year ending on the last Saturday of the calendar year. All references to the quarter refer to Nanometrics’ fiscal quarter. The fiscal quarters reported herein are 13 week periods.

Use of Estimates – The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ materially from those estimates. Estimates are used for, but not limited to, revenue recognition, the provision for doubtful accounts, the provision for excess, obsolete, or slow-moving inventories, valuation of intangible and long-lived assets, warranty accruals, income taxes, valuation of stock-based compensation, and contingencies.

Revenue Recognition –  The Company derives revenue from the sale of process control metrology and inspection systems and related upgrades (“product revenue”) as well as spare part sales, billable service and service contracts (together “service revenue”). Upgrades are system software and hardware performance upgrades that extend the features and functionality of a product. Upgrades are included in product revenue, which consists of sales of complete, advanced process control metrology and inspection systems (the “system(s)”). Nanometrics’ systems consist of hardware and software components that function together to deliver the essential functionality of the system. Arrangements for sales of systems and upgrades often include defined customer-specified acceptance criteria.

In summary, the Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller's price is fixed or determinable, and collectability is reasonably assured.

7

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

For repeat product sales to existing customers, revenue recognition occurs at the time title and risk of loss transfer to the customer, which usually occurs upon shipment from the Company's manufacturing location, if it can be reliably demonstrated that the product has successfully met the defined customer specified acceptance criteria and all other recognition criteria have been met. For initial sales where the product has not previously met the defined customer specified acceptance criteria, product revenues are recognized upon the earlier of receipt of written customer acceptance or expiration of the contractual acceptance period. In Japan, where contractual terms with the customer specify risk of loss and title transfers upon customer acceptance, revenue is recognized upon receipt of written customer acceptance, provided that all other recognition criteria have been met.

The Company warrants its products against defects in manufacturing. Upon recognition of product revenue, a liability is recorded for anticipated warranty costs. On occasion, customers request a warranty period longer than the Company's standard warranty. In those instances, where extended warranty services are separately quoted to the customer, the associated revenue is deferred and recognized as service revenue ratably over the term of the extended warranty period. The portion of service contracts and extended warranty services agreements that are uncompleted at the end of any reporting period are included in deferred revenue.

The Company sells software that is considered to be an upgrade to a customer's existing systems. These standalone software upgrades are not essential to the tangible product's functionality and are accounted for under software revenue recognition rules which require vendor specific objective evidence (“VSOE”) of fair value to allocate revenue in a multiple element arrangement. Revenue from software sales is recognized when the software is delivered to the customer, provided that all other recognition criteria have been met.

The majority of other upgrades are sold based on published specifications. For basic upgrades, revenue is recognized at the time title and risk of loss transfer to the customer which is usually upon shipment. For complex and extensive upgrades, specific acceptance or prior acceptance for a similar upgrade is required in order to recognize revenue.

Revenue related to spare parts is recognized upon shipment. Revenue related to billable services is recognized as the services are performed. Service contracts may be purchased by the customer during or after the warranty period and revenue is recognized ratably over the service contract period.

Frequently, the Company delivers products and various services in a single transaction. The Company's deliverables consist of tools, installation, upgrades, billable services, spare parts, and service contracts. The Company's typical multi-element arrangements include a sale of one or multiple tools that include installation and standard warranty. Other arrangements consist of a sale of tools bundled with service elements or delivery of different types of services. The Company's tools, upgrades, and spare parts are generally delivered to customers within a period of up to six months from order date. Installation is usually performed soon after delivery of the tool. The portion of revenue associated with installation is deferred based on relative selling price and that revenue is recognized upon completion of the installation and receipt of final acceptance. Billable services are billed on a time and materials basis and performed as requested by customers. Under service contract arrangements, services are provided as needed over the fixed arrangement term, which terms can be up to twelve months. The Company does not grant its customers a general right of return or any refund terms and imposes a penalty on orders cancelled prior to the scheduled shipment date.

The Company evaluates its revenue arrangements to identify deliverables and to determine whether these deliverables are separable into multiple units of accounting. The Company allocates the arrangement consideration among the deliverables based on relative selling prices. The Company has established VSOE for some of its products and services when a substantial majority of selling prices falls within a narrow range when sold separately. For deliverables with no established VSOE, the Company uses best estimate of selling price to determine standalone selling price for such deliverable. The Company does not use third party evidence to determine standalone selling price since this information is not widely available in the market as the Company's products contain a significant element of proprietary technology and the solutions offered differ substantially from competitors. The Company has established a process for developing estimated selling prices, which incorporates historical selling prices, the effect of market conditions, gross margin objectives, pricing practices, as well as entity-specific factors. The Company monitors and evaluates estimated selling price on a regular basis to ensure that changes in circumstances are accounted for in a timely manner.

When certain elements in multiple-element arrangements are not delivered, or accepted at the end of a reporting period, the relative selling prices of undelivered elements are deferred until these elements are delivered and/or accepted. If deliverables cannot be accounted for as separate units of accounting, the entire arrangement is accounted for as a single unit of accounting and revenue is deferred until all elements are delivered and all revenue recognition requirements are met.

8

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Note 2. Recent Accounting Pronouncements

Accounting Standards Adopted

In March 2016, the FASB issued an accounting standards update that simplifies several aspects of the accounting for share-based payment award transactions, including income tax consequences, classification of awards as equity or liability, and classification on the statement of cash flows. The new standard requires adoption of certain amendments relevant to the Company to be applied using a modified retrospective transition method by means of cumulative effect adjustment to retained earnings as of the beginning of the fiscal year 2017.

The new standard permits entities to make an accounting policy election related to how forfeitures will impact the recognition of compensation cost for stock-based compensation. The Company has elected to account for forfeitures as they occur and adopted this change on a modified retrospective basis. The cumulative effect of this change resulted in a $0.1 million increase to accumulated deficit as of January 1, 2017.

Furthermore, the standard requires excess tax benefits and tax deficiencies to be recorded in the income statement when the awards vest or are settled rather than paid-in capital. The Company recorded the cumulative effect of this change as a $1.2 million reduction to accumulated deficit in the first quarter of fiscal 2017 to reflect the recognition of excess tax benefits in prior years, with a corresponding adjustment to deferred tax assets and long-term tax liabilities. The Company adopted the guidance related to the recognition of excess tax benefits and deficiencies as income tax expense or benefit on a modified retrospective basis. In addition, the Company elected to report cash flows related to excess tax benefits on a prospective basis. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to the Company’s statement of cash flows since such cash flows have historically been presented as a financing activity. 

In July 2015, the FASB issued an accounting standards update which simplifies the measurement of inventory by requiring inventory to be measured at the lower of cost and net realizable value. The new standard applies only to inventories for which cost is determined by methods other than last-in-first-out and the retail inventory method. Effective in the first quarter of fiscal 2017, the Company adopted this guidance. The adoption of this guidance did not have a significant impact on the Company’s consolidated financial condition and results of operation.

Accounting Standards Not Yet Adopted

In January 2017, the Financial Accounting Standards Board (the "FASB") issued an accounting standard update which simplifies the subsequent measurement of goodwill and removes step 2 from the goodwill impairment test. Instead, an entity should record an impairment charge based on excess of a reporting unit’s carrying amount over its fair value. The standard is effective for public companies for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated financial condition and results of operations.

In October 2016, the FASB issued an accounting standard update which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This standard will be effective for annual reporting periods beginning after December 15, 2017, including interim reporting period within those annual periods. Early adoption is permitted. This standard update is required to be adopted using the modified retrospective approach, with a cumulative catch-up adjustment to retained earnings in the period of adoption. The Company is currently evaluating the impact of adopting this standard on its consolidated financial condition and results of operations.

In August 2016, the FASB issued an accounting standard which addresses eight specific cash flow classification issues. This update is effective for public companies for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period, and all the amendments must be adopted in the same period. The standard is to be applied through a retrospective transition method to each period presented. If it is impracticable to apply retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated statement of cash flows.

9

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

In June 2016, the FASB issued an accounting standard which requires measurement and timely recognition of expected credit losses for financial assets. The update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The standard is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company is currently evaluating the effect of this update on its consolidated financial condition and results of operations.

In February 2016, the FASB issued an accounting standards update which requires lessees to record a right-of-use asset and a corresponding lease liability on the balance sheet (with the exception of short-term leases). For lessees, leases will continue to be classified as either operating or financing in the income statement. The standard is effective for public companies for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. This standard is required to be applied with a modified retrospective transition approach. The Company generally does not finance purchases of equipment or other capital, but does lease some equipment and facilities. The Company is currently evaluating the impact of this standard on its consolidated financial statements and related disclosures but anticipates most its existing operating lease commitments will be recognized as operating lease liabilities and right-of-use assets.

In May 2014, the FASB issued an accounting standards update which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB deferred for one year the effective date of the new revenue standard, with early adoption permitted but not earlier than the original effective date. Consequently, the new standard will be effective for the Company on December 31, 2017 and the Company does not plan to adopt early.

Based on the Company’s current assessment, the Company expects to adopt the new guidance in the first quarter of fiscal 2018 by using the modified retrospective method of transition. While the Company continues to assess the impact of the new standard, the Company believes that the timing of revenue recognition for certain systems and performance obligations, will generally occur earlier than under current revenue recognition guidance. Under current U.S. GAAP, revenue for certain systems or performance obligations is delayed until formal customer sign-off has occurred and/or contractual obligations have been met, whereas under the new standard, revenue should be recorded when transfer of control has occurred, which is normally upon shipment. While the Company currently expects revenue related to these arrangements to remain unchanged in total, the nature of when control transfers may change the timing of revenue recognition.  Additionally, the Company believes the adoption of the new standard will most likely not result in a different set of performance obligations, when compared to current GAAP.  The Company further believes that required changes to its current business processes and IT systems, to comply with the new standard, will be minor in nature.  Other aspects of the standard, including the capitalization of costs related to the acquisition and/or fulfillment of the Company’s contracts are still being evaluated, but the Company believes impacts will be either minor or immaterial.  The Company is currently evaluating the impact of the new standard on the Company’s contracts with customers and will continue to monitor industry activities and other guidance provided by the accounting profession and regulators and adjust its approach and implementation plans as required.

Note 3. Fair Value Measurements and Disclosures

The Company determines the fair values of its financial instruments based on the fair value hierarchy established in FASB Accounting Standards Codification (“ASC”) 820, Fair Value Measurement, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into the following three levels that may be used to measure fair value:

Level 1 — Quoted prices in active markets for identical assets or liabilities.

Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 — Unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities. Such unobservable inputs include an estimated discount rate used in the Company’s discounted present value analysis of

10

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

future cash flows, which reflects the Company’s estimate of debt with similar terms in the current credit markets. As there is currently minimal activity in such markets, the actual rate could be materially different.

Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The standard assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability.

The following tables present the Company’s assets and liabilities measured at estimated fair value on a recurring basis, excluding accrued interest components, categorized in accordance with the fair value hierarchy (in thousands), as of the following dates:

	September 30, 2017								December 31, 2016
	Fair Value Measurements Using Input Types								Fair Value Measurements Using Input Types
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	812	$	—	$	—	$	812	$	959	$	—	$	—	$	959
Commercial paper and corporate debt    securities		—		4,994		—		4,994		—		2,499		—		2,499
Total cash equivalents	$	812	$	4,994	$	—	$	5,806	$	959	$	2,499	$	—	$	3,458
Marketable securities:
U.S. Treasury securities and U.S. Government agency debt securities		—		2,497		—		2,497		—		17,072		—		17,072
Certificates of deposits		—		23,298		—		23,298		—		23,019		—		23,019
Commercial paper		—		17,910		—		17,910		—		22,402		—		22,402
Municipal securities and corporate debt securities		—		45,697		—		45,697		—		14,943		—		14,943
Asset-backed Securities		—		6,914		—		6,914		—		5,463		—		5,463
Total marketable securities	$	—	$	96,316	$	—	$	96,316	$	-	$	82,899	$	—	$	82,899
Total(1)	$	812	$	101,310	$	—	$	102,122	$	959	$	85,398	$	—	$	86,357

⁽¹⁾ Excludes $38.2 million and $43.6 million held in operating accounts as of September 30, 2017 and December 31, 2016, respectively. See “Note 4. Cash and Investments” of the Notes to Consolidated Financial Statements for more information.

The fair values of the marketable securities that are classified as Level 1 in the table above were derived from quoted market prices for identical assets or liabilities in active markets that the Company has the ability to access. The fair value of marketable securities that are classified as Level 2 in the table above were derived from non-binding market consensus prices that were corroborated by observable market data, quoted market prices for similar instruments, or pricing models, such as discounted cash flow techniques with all significant inputs derived from or corroborated by observable market data. There were no transfers of instruments between Level 1, Level 2 and Level 3 during the financial periods presented.

Derivatives

The Company uses foreign currency exchange forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in foreign currencies. These derivatives are carried at fair value with changes recorded in other income (expense), net in the consolidated statements of operations. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. The derivatives have maturities of approximately 30 days.

The settlement of forward foreign currency contracts included in the three months ended September 30, 2017 and September 24, 2016 was a gain of $0.3 million and $0.1 million, respectively. The settlement of forward foreign currency contracts included in the

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

nine months ended September 30, 2017 and September 24, 2016 was a gain of $1.0 million and a loss of $1.2 million, respectively. These are included in other income (expense), net, in the consolidated statements of operations.

The following table presents the notional amounts and fair values of the Company’s outstanding derivative instruments in U.S. Dollar equivalent (in millions):

	As of September 30, 2017						As of December 31, 2016
			Fair Value						Fair Value
	Notional Amount		Asset		Liability		Notional Amount		Asset		Liability
Undesignated Hedges:
Forward Foreign Currency Contracts
Purchase	$	21.6		—	$	0.1	$	12.6		—		—
Sell	$	16.6		—	$	0.1	$	1.3		—		—

Note 4. Cash and Investments

The following tables present cash, cash equivalents, and available-for-sale investments as of the following dates (in thousands):

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	38,235	$	—	$	—		$	38,235
Cash equivalents:
Money market funds		812		—		—			812
Commercial paper and corporate debt securities		4,994		—		—			4,994
Marketable securities:
U.S. Treasury securities		501		—		—			501
U.S. Government agency securities		2,001		—		(5	)		1,996
Certificate of deposits		23,298		—		—			23,298
Commercial paper		17,907		3		—			17,910
Corporate debt securities		45,701		—		(4	)		45,697
Asset-backed securities		6,916		—		(2	)		6,914
Total cash, cash equivalents, and marketable securities	$	140,365	$	3	$	(11	)	$	140,357
	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	43,604	$	—	$	—		$	43,604
Cash equivalents:
Money market funds		959		—		—			959
Commercial paper and corporate debt securities		2,499		—		—			2,499
Marketable securities:
U.S. Treasury securities		5,667		—		—			5,667
U.S. Government agency securities		11,412		—		(7	)		11,405
Certificates of deposits		23,000		19		—			23,019
Commercial paper		22,402		—		—			22,402
Corporate debt securities		14,194		—		(6	)		14,188
Municipal securities		756		—		(1	)		755
Asset-backed securities		5,466		—		(3	)		5,463
Total cash, cash equivalents, and marketable securities	$	129,959	$	19	$	(17	)	$	129,961

12

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Available-for-sale marketable securities, readily convertible to cash, with maturity dates of 90 days or less are classified as cash equivalents, while those with maturity dates greater than 90 days are classified as marketable securities within short-term assets. All marketable securities as of September 30, 2017 and December 31, 2016, were available-for-sale and reported at fair value based on the estimated or quoted market prices as of the balance sheet date.

Realized gains and losses on sale of securities are recorded in other income (expense), net, in the Company’s statement of operations. For the three months ended September 30, 2017 and September 24, 2016, net realized gains and losses were not material. For the nine months ended September 30, 2017 and September 24, 2016, net realized gains and losses were $0.9 million and $0.3 million, respectively.

Unrealized gains or losses, net of tax effect, are recorded in accumulated other comprehensive income (loss) within stockholders’ equity. Both the gross unrealized gains and gross unrealized losses for the three and nine months ended September 30, 2017 and September 24, 2016 were not material and no marketable securities had other than temporary impairment.

All marketable securities as of September 30, 2017 and December 31, 2016, had maturity dates of less than two years.

Note 5. Accounts Receivable

The Company maintains arrangements under which eligible accounts receivable in Japan are sold without recourse to unrelated third-party financial institutions. These receivables were not included in the consolidated balance sheets as the criteria for sale treatment had been met. The Company pays administrative fees as well as interest ranging from 0.61% to 1.68% based on the anticipated length of time between the date the sale is consummated and the expected collection date of the receivables sold.

The Company sold $6.1 million and $10.1 million of receivables during the three months ended September 30, 2017 and September 24, 2016, respectively, and $15.5 and $29.6 million of receivables during the nine months ended September 30, 2017 and September 24, 2016. There were no material gains or losses on the sale of such receivables. There were no amounts due from such third party financial institutions at September 30, 2017 and December 31, 2016.

13

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Note 6. Financial Statement Components

The following tables provide details of selected financial statement components as of the following dates (in thousands):

	At
	September 30, 2017			December 31, 2016
Inventories:
Raw materials and sub-assemblies	$	31,772		$	23,506
Work in process		18,280			10,347
Finished goods		4,968			4,984
Inventories		55,020			38,837
Inventories-delivered systems		3,320			2,457
Total inventories	$	58,340		$	41,294
Property, plant and equipment, net:(1)
Land	$	15,571		$	15,568
Building and improvements		20,649			20,532
Machinery and equipment		35,428			35,659
Furniture and fixtures		2,289			2,282
Software		9,261			9,756
Capital in progress		1,825			2,748
Total property, plant and equipment, gross		85,023			86,545
Accumulated depreciation and amortization		(42,706	)		(42,319	)
Total property, plant and equipment, net	$	42,317		$	44,226
(1) Total depreciation and amortization expense was $1.6 million and $1.7 million for the three months ended September 30, 2017 and September 24, 2016, respectively, and $5.1 million for both nine months ended September 30, 2017 and September 24, 2016.
Other Current Liabilities:
Accrued warranty	$	4,542		$	3,838
Customer deposits		67			581
Retrofit liability		353			432
Accrued professional services		784			424
Accrued royalties		60			1,233
Other		1,898			1,539
Total other current liabilities	$	7,704		$	8,047

Components of Accumulated Other Comprehensive Income (Loss)

	Foreign Currency Translations			Defined Benefit Pension Plans			Unrealized Income (Loss) on Investment			Accumulated Other Comprehensive Income
Balance as of December 31, 2016	$	(5,817	)	$	(227	)	$	(2	)	$	(6,046	)
Current period change		3,470			—			(2	)		3,468
Balance as of September 30, 2017	$	(2,347	)	$	(227	)	$	(4	)	$	(2,578	)

The items above, except for unrealized income (loss) on investment, did not impact the Company’s income tax provision. The amounts reclassified from each component of accumulated other comprehensive income (loss) into income statement line items were insignificant.

14

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Note 7. Goodwill and Intangible Assets

The following table summarizes the activity in the Company’s goodwill during the nine months ended September 30, 2017:

	(in thousands)
Balance as of December 31, 2016	$	8,940
Foreign currency movements		1,159
Balance as of September 30, 2017	$	10,099

Finite-lived intangible assets are recorded at cost, less accumulated amortization. Finite-lived intangible assets as of September 30, 2017 and December 31, 2016 consisted of the following (in thousands):

	September 30, 2017
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	18,758	$	(16,517	)	$	2,241
Customer relationships		9,426		(9,426	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,235	)		17
Trademark		80		(80	)		—
Total	$	32,443	$	(30,185	)	$	2,258

	December 31, 2016
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	15,726	$	(15,380	)	$	346
Customer relationships		9,322		(9,322	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,186	)		66
Trademark		80		(80	)		—
Total	$	29,307	$	(28,895	)	$	412

The amortization of finite-lived intangibles is computed using the straight-line method. Estimated lives of finite-lived intangibles range from two to ten years. The total amortization expense for the three months ended September 30, 2017 and September 24, 2016 was $0.1 million and $0.4 million, respectively. Total amortization expense for the nine months ended September 30, 2017 and September 24, 2016 was $0.2 million and $1.3 million, respectively.

There were no impairment charges related to intangible assets recorded during the three and nine months ended September 30, 2017 and September 24, 2016.

The estimated future amortization expense of finite intangible assets as of September 30, 2017 is as follows (in thousands):

Fiscal Years	Amounts
2017 (remaining three months)		52
2018		283
2019		352
2020		286
Thereafter		1,285
Total future amortization expense	$	2,258

15

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Note 8. Warranties

The Company generally sells its products with a 12 months repair or replacement warranty from the date of acceptance or shipment date. The Company provides an accrual for estimated future warranty costs based upon the historical relationship of warranty costs to the cost of products sold. The estimated future warranty obligations related to product sales are recorded in the period in which the related revenue is recognized. The estimated future warranty obligations are affected by the warranty periods, sales volumes, product failure rates, material usage, and labor and replacement costs incurred in correcting a product failure. If actual product failure rates, material usage, labor or replacement costs were to differ from the Company’s estimates, revisions to the estimated warranty obligations would be required. For new product introductions where limited or no historical information exists, the Company may use warranty information from other previous product introductions to guide it in estimating its warranty accrual.

Components of the warranty accrual, which were included in the accompanying condensed consolidated balance sheets with other current liabilities, were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30, 2017			September 24, 2016			September 30, 2017			September 24, 2016
Balance as of beginning of period	$	4,602		$	4,556		$	3,838		$	4,504
Accruals for warranties issued during period		1,020			1,100			3,800			3,529
Settlements during the period		(1,080	)		(1,471	)		(3,096	)		(3,848	)
Balance as of end of period	$	4,542		$	4,185		$	4,542		$	4,185

Note 9. Commitments and Contingencies

Intellectual Property Indemnification Obligations – The Company will, from time to time, in the normal course of business, agree to indemnify certain customers, vendors or others against third party claims that the Company’s products, when used for their intended purpose(s), or the Company’s intellectual property, infringe the intellectual property rights of such third parties or other claims made against parties with whom it enters into contractual relationships. It is not possible to determine the maximum potential amount of liability under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances that are likely to be involved in each particular claim. Historically, the Company has not made payments under these obligations and believes that the estimated fair value of these agreements is immaterial. Accordingly, no liabilities have been recorded for these obligations in the accompanying condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016.

Legal Proceedings - From time to time, the Company is subject to various legal proceedings or claims arising in the ordinary course of business.

On August 2, 2017, the Company was named as defendant in a complaint filed in New Hampshire Superior Court (“Complaint”). The Complaint, brought by Optical Solutions,  Inc. (“OSI”), alleges claims arising from a purported exclusive purchase contract between OSI and the Company pertaining to certain product. On September 18, 2017, the Company removed the action to the United States District Court for the District of New Hampshire. On September 25, 2017, the Company moved to transfer the Complaint to the Northern District of California and to dismiss all claims in the Complaint for lack of personal jurisdiction and for failure to state a claim. On September 27, 2017, OSI filed a motion to remand. OSI has not yet responded to the Company’s motions to transfer or dismiss.

The Company records a provision for a loss when it believes that it is both probable that a loss has been incurred and the amount can be reasonably estimated. Based on current information, the Company believes it does not have any probable and reasonably estimable losses related to any current legal proceedings and claims. Although it is difficult to predict the outcome of legal proceedings, the Company believes that any liability that may ultimately arise from the resolution of these ordinary course matters will not have a material adverse effect on the business, financial condition and results of operations.

Note 10. Net Income Per Share

The Company presents both basic and diluted net income per share on the face of its condensed consolidated statements of operations. Basic net income per share excludes the effect of potentially dilutive shares and is computed by dividing net income by the

16

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

weighted-average number of shares of common stock outstanding for the period. Diluted net income per share is computed using the weighted-average number of shares of common stock outstanding for the period plus the effect of all dilutive securities representing potential shares of common stock outstanding during the period.

A reconciliation of the share denominator of the basic and diluted net income per share computations for three and nine months ended September 30, 2017 and September 24, 2016 is as follows (in thousands):

	Three Month Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Weighted average common shares outstanding used in    basic net income (loss) per share calculation		25,494		24,826		25,320		24,550
Potential dilutive common stock equivalents,    using treasury stock method		438		456		613		429
Weighted average shares used in diluted net income    (loss) per share calculation		25,932		25,282		25,933		24,979

Note 11. Stockholders’ Equity and Stock-Based Compensation

Options and Employee Stock Purchase Plan (“ESPP”) Awards

The fair value of each option and ESPP award is estimated on the grant date using the Black-Scholes valuation model and the assumptions noted in the following table. The expected lives of options granted were calculated using the simplified method allowed by the Staff Accounting Bulletin No. 107, Share-Based Payment. The risk-free rates were based on the U.S Treasury rates in effect during the corresponding period of grant. The expected volatility was based on the historical volatility of the Company’s stock price. The dividend yield reflects that the Company has not paid any cash dividends since inception and does not intend to pay any cash dividends in the foreseeable future.

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017			September 24, 2016
Employee Stock Purchase Plan:
Expected life	0.5 years		0.5 years		0.5 years			0.5 years
Volatility		38.9%		38.2%		37.2	%		38.7%
Risk free interest rate		1.13%		0.37%		0.91	%		0.44%
Dividends		—		—		—			—

No stock options were awarded during the nine months ended September 30, 2017 and September 24, 2016, respectively.

A summary of activity of stock options during the nine months ended September 30, 2017 is as follows:

	Number of Shares Outstanding (Options)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (inThousands)
Options
Outstanding at December 31, 2016		440,545		$	15.06		2.12	$	4,405
Exercised		(180,629	)	$	13.58
Cancelled		(855	)	$	16.63
Outstanding at September 30, 2017		259,061		$	16.09		1.81	$	3,293
Exercisable at September 30, 2017		255,665		$	16.06		1.79	$	3,256

17

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

The aggregate intrinsic value in the above table represents the total pretax intrinsic value, based on the Company’s closing stock price of $28.80 as of September 29, 2017, the last trading day of the quarter, which would have been received by the option holders had all option holders exercised their options as of that date. The total intrinsic value of options exercised during the three months ended September 30, 2017 and September 24, 2016 was $1.0 million and $0.5 million, respectively, and during the nine months ended September 30, 2017 and September 24, 2016 was $2.4 and $1.9 million, respectively.

Restricted Stock Units (“RSUs”)

Time-based RSUs are valued using the market value of the Company’s common stock on the date of grant, assuming no expectation of dividends paid.

A summary of activity for RSUs is as follows:

Summary of activity for RSUs	Number of RSUs			Weighted Average Fair Value
Outstanding RSUs as of December 31, 2016		819,785		$	16.79
Granted		340,070		$	27.29
Released		(356,619	)	$	16.79
Cancelled		(44,046	)	$	17.21
Outstanding RSUs as of September 30, 2017		759,190		$	21.48

Market-Based Performance Stock Units (“PSUs”)

In addition to granting RSUs that vest on the passage of time only, the Company granted PSUs to key executives. The PSUs vest in three equal tranches over one, two and three years based on the relative performance of the Company’s stock during those periods, compared to a peer group over the same period. If target stock price performance is achieved, 66.7% of the shares of the Company’s common stock subject to the PSUs will vest. Up to a maximum of 100% of the shares subject to the PSUs will vest if the maximum stock price performance is achieved for each tranche.

A summary of activity for PSUs is as follows:

Summary of activity for PSUs	Number of PSUs			Weighted Average Fair Value
Outstanding PSUs as of December 31, 2016		107,500		$	9.94
Granted		59,550			26.75
Released		(38,500	)		10.41
Cancelled		(4,000	)		12.64
Outstanding PSUs as of September 30, 2017		124,550		$	17.86

The preceding table reflects the maximum awards that can be achieved upon full vesting.

Valuation of PSUs

On the date of grant, the Company estimated the fair value of PSUs using a Monte Carlo simulation model. The assumptions for the valuation of PSUs are summarized as follows:

	2017 Award		2016 Award
Grant Date Fair Value Per Share		26.75	$	8.52
Weighted-average assumptions/inputs:
Expected Dividend		—		—
Range of risk-free interest rates		1.40%		0.92%
Range of expected volatilities for peer group	23%-62%		22%-93%

18

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Stock-based Compensation Expense

Stock-based compensation expense for all share-based payment awards made to the Company’s employees and directors pursuant to the employee stock option and employee stock purchase plans by function were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Cost of products	$	216	$	116	$	628	$	273
Cost of service		161		138		463		355
Research and development		509		387		1,262		985
Selling		639		537		1,707		1,492
General and administrative		922		822		2,715		2,327
Total stock-based compensation expense related to employee stock options and employee stock purchases	$	2,447	$	2,000	$	6,775	$	5,432

Note 12. Income Taxes

The Company accounts for income taxes under the provisions of ASC 740, Accounting for Income Taxes. The Company adjusts its effective tax rate each quarter to be consistent with the estimated annual effective tax rate. The Company also records the tax effect of unusual or infrequently occurring discrete items, including changes in judgment about valuation allowances and effects of changes in tax laws or tax rates, in the interim period in which they occur. The Company's effective tax rate reflects the impact of a portion of its earnings being taxed in foreign jurisdictions as well as a valuation allowance maintained on certain deferred tax assets.

The provision for income taxes consists of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Provision for income taxes	$	1,756	$	1,332	$	4,492	$	2,568

The Company recorded a tax provision of $1.8 million and $1.3 million for the three months ended September 30, 2017 and September 24, 2016, respectively. The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the three months ending September 24, 2016 as the Company, at that time, was recording a valuation allowance against its U.S. deferred tax assets.

The Company recorded a tax provision of $4.5 million and $2.6 million for the nine months ended September 30, 2017 and September 24, 2016, respectively. The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the nine months ending September 24, 2016 as the Company, at that time, was recording a valuation allowance against its U.S. deferred tax assets.  The increase in the tax provision is also due to an increase in Company’s profitability for the nine months ended September 30, 2017.

The Company continues to maintain a valuation allowance against its California and certain foreign deferred tax assets as a result of uncertainties regarding the realization of the assets due to cumulative losses and uncertainty of future taxable income. The Company will continue to assess the realizability of the deferred tax assets in each of the applicable jurisdictions and maintain the valuation allowances until sufficient positive evidence exists to support a reversal. In the event the Company determines that the deferred tax assets are realizable, an adjustment to the valuation allowance will be reflected in the tax provision for the period such determination is made.

The Company is subject to taxation in the U.S. and various states including California, and foreign jurisdictions including Korea, Japan, Taiwan, China, Singapore, Germany, U.K., France, and Israel. Due to tax attribute carry-forwards, the Company is subject to examination for tax years 2003 forward for U.S. tax purposes. The Company is also subject to examination in various states for tax years 2002 forward. The Company is subject to examination for tax years 2007 forward for various foreign jurisdictions.

19

NANOMETRICS INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. The total amount of penalties and interest were not material as of September 30, 2017 and September 24, 2016. During the next twelve months, the Company anticipates increases in its unrecognized tax benefits of approximately $0.4 million.

Note 13. Segment, Geographic, Product and Significant Customer Information

The Company has one operating segment, which is the sale, design, manufacture, marketing and support of optical critical dimension and thin film systems. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Total net revenues (1):
South Korea	$	22,269	$	15,710	$	72,388	$	35,226
Japan		4,781		11,765		17,400		24,669
United States		6,231		8,211		28,101		24,306
China		3,403		7,364		17,420		33,883
Taiwan		2,304		6,334		19,016		16,962
Singapore		9,774		5,078		12,229		18,645
Other		7,913		4,252		13,862		8,279
Total net revenues	$	56,675	$	58,714	$	180,416	$	161,970

	September 30, 2017		December 31, 2016
Long-lived tangible assets:
United States	$	41,002	$	42,688
International		1,315		1,538
Total long-lived tangible assets	$	42,317	$	44,226

The following customers accounted for 10% or more of total accounts receivable, net:

	At
	September 30, 2017		December 31, 2016
Samsung Electronics Co. Ltd.		23%		14%
Micron Technology, Inc.		27%		12%
Taiwan Semiconductor Manufacturing Company Limited	***			20%
Intel Corporation		11%		11%
Toshiba Corporation	***			10%

*** The customer accounted for less than 10% of total accounts receivable, net, as of that period end.

The following customers accounted for 10% or more of total net revenues:

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Samsung Electronics Co. Ltd.		32%	***			28%	***
SK Hynix	***			19%		15%		14%
Intel Corporation		14%		19%		12%		19%
Micron Technology, Inc.		19%		15%		11%		25%

*** The customer accounted for less than 10% of total net revenues during the period.

20

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q contains forward-looking statements that involve risks and uncertainties. The statements contained in this document that are not purely historical are forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, including, without limitation, statements regarding future periods, financial results, revenues, margins, growth, customers, tax rates, product performance, and the impact of accounting rules on our business and the future implications of our statements regarding goals, strategy, and similar terms. We may identify these statements by the use of words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “may,” “might,” “project,” “will,” and other similar expressions. All forward-looking statements included in this document are based on information available to us on the date hereof, and we assume no obligation to update any such forward-looking statements, except as may otherwise be required by law.

Our actual results could differ materially from those anticipated in these forward-looking statements as a result of certain risks, uncertainties and changes in circumstances, many of which may be difficult to predict or beyond our control, including those factors referenced in this document, and in Part I, Item 1A, Risk Factors, in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed with the Securities and Exchange Commission (“SEC”) on March 3, 2017 (our “Annual Report”). In particular, our results could vary significantly based on: changes in customer and industry spending; rate and extent of changes in product mix; adoption of new products; timing of orders, shipments, and acceptance of products; our ability to secure volume supply agreements; and general economic conditions. In evaluating our business, investors should carefully consider these factors in addition to any other risks and uncertainties set forth elsewhere. The occurrence of the events described in the risk factors of our Annual Report and elsewhere in this report as well as other risks and uncertainties could materially and adversely affect our business, operating results and financial condition. While management believes that the discussion and analysis in this report is adequate for a fair presentation of the information presented, we recommend that you read this discussion and analysis in conjunction with (i) our audited consolidated financial statements and notes thereto for the fiscal year ended December 31, 2016, which were included in our Annual Report, (ii) the section captioned “Risk Factors” in our Annual Report, and (iii) our other filings with the SEC.

Overview

Together with our subsidiaries, we are a leading provider of advanced, high-performance process control metrology and inspection systems used primarily in the fabrication of semiconductors and other solid-state devices, including sensors, optoelectronic devices, high-brightness LEDs (“HB-LED”), discretes, and data storage components. Our automated and integrated metrology systems measure critical dimensions, device structures, topography and various thin film properties, including three-dimensional features and film thickness, as well as optical, electrical and material properties. Our process control solutions are deployed throughout the fabrication process, from front-end-of-line substrate manufacturing, to high-volume production of semiconductors and other devices, to advanced three-dimensional wafer-level packaging applications. Our systems enable advanced process control for device manufacturers, providing improved device yield at reduced manufacturing cycle time, supporting accelerated product life cycles in the semiconductor and other device markets.

Principal factors that impact our revenue growth include capital expenditures by manufacturers of semiconductors to increase capacity and to enable their development of new technologies, and our ability to improve market share. The increasing complexity of the manufacturing processes for semiconductors is an important factor in the demand for our innovative metrology systems. Our strategy is to continue to innovate organically as well as to evaluate strategic acquisitions to address business challenges and opportunities.

Our revenues are derived primarily from product and software sales but are also derived from customer service, upgrades and software for the installed base of our products. For the nine months ended September 30, 2017, we derived 82% of our total net revenues from product, upgrade and software sales, and 18% of our total net revenues from services.

Nanometrics Products

We offer a diverse line of systems to address the broad range of process control requirements of the semiconductor manufacturing industry. In addition, we believe that our product development and engineering expertise, as well as strategic acquisitions will enable us to develop and offer advanced process control solutions that, in the future, should address industry advancement and trends.

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Automated Systems

Our automated systems primarily consist of fully automated metrology systems that are employed in semiconductor production environments. The Atlas^® III, Atlas II+ and Atlas XP⁺ represent our line of high-performance metrology systems providing optical critical dimension (“OCD^®”), thin film metrology and wafer stress for transistor and interconnect metrology applications. The OCD technology is supported by our NanoCD^® suite of solutions including our NanoDiffract^®, SpectraProbe^TM software and NanoGen^TM scalable computing engine that enables visualization, modeling, and analysis of complex structures. The UniFire^TM system measures multiple parameters at any given process step in the advanced packaging process flow for critical dimension, overlay, and topography applications and has recently added inspection capabilities for both front-end-of-line (“FEOL”) patterned wafer and advanced packaging related applications.

Integrated Systems

Our integrated metrology (“IM”) systems are installed directly onto wafer processing equipment to provide near real-time measurements for improved process control and maximum throughput. Our IM systems are sold directly to end customers. The IMPULSE+ and IMPULSE^® represent our latest metrology platform for OCD and thin film metrology, and have been successfully qualified on numerous independent Wafer Fabrication Equipment Suppliers’ platforms. Our NanoCD suite of solutions is sold in conjunction with our IMPULSE^® systems. Our Trajectory^® system provides in-line measurement of layers in thin film thickness and composition in semiconductor applications and is qualified in production with major device makers.

Software

NanoDiffract^® is a modeling, visualization and analysis software that takes signals from the automated and integrated metrology systems providing critical dimension, thickness, and optical properties from in line measurements.  The software has an intuitive three-dimensional modeling interface to provide visualization of today’s advanced and complex semiconductor devices.  There are proprietary fitting algorithms in NanoDiffract that enable very accurate and very fast calculations for signal processing for high fidelity model based measurements.

SpectraProbe™ is a model-less fitting engine that enables fast time to solution for in-line excursion detection and control.  SpectraProbe complements the high-fidelity modeling of NanoDiffract with a simple machine learning interface for rapid recipe deployment.  SpectraProbe expands the types of structures that can be used for metrology and control including in-die and on-device areas.  Both analysis packages are supported by the automated and integrated systems, can be deployed in run-time environments and support off-line processing as part of a factory control solution when deployed on NanoCentral and NanoGen servers.

Materials Characterization

Our materials characterization products include systems that are used to monitor the physical, optical, electrical and material characteristics of discrete electronic industry, opto-electronic, HB-LED, solar photovoltaics, compound semiconductor, strained silicon and silicon-on-insulator (“SOI”) devices, including composition, crystal structure, layer thickness, dopant concentration, contamination and electron mobility.

The RPMBlue™ is our photoluminescence mapping system designed specifically for the HB-LED market, and is complemented by the RPMBlue-FS, enabling a breadth of research and development configurability. We sell Fourier-Transform Infrared (“FTIR”) automated and manual systems in the QS2200/3300 and QS1200 respectively. The NanoSpec^® line, including the NanoSpec II, supports thin film measurement across all applications in both low volume production and research applications.

We are continually working to strengthen our competitive position by developing new technologies and products in our market segment. We have expanded our product offerings to address growing applications within the semiconductor manufacturing and adjacent industries. In pursuit of our goals, we have:

• Introduced new products, applications, and upgrades in every core product line and primary market served;

• Diversified our product line and served markets through acquisitions, such as: the 2006 acquisition of Accent Optical Technologies, Inc., a supplier of overlay and thin film metrology and process control systems; the 2008 acquisition of Tevet Process Control Technologies (“Tevet”), an integrated metrology supplier; the 2009 acquisition of the UniFire™ product line from Zygo Corporation, a wholly owned subsidiary of AMETEK, Inc.; and the 2011 acquisition of Nanda Technologies GmbH, a supplier of high sensitivity, high throughput defect inspection systems;

• Continued development of new measurement and inspection technologies for advanced fabrication processes and packaging.

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Important Themes and Significant Trends

The semiconductor equipment industry is characterized by new manufacturing processes (node) coming to market every two to three years. At every new node in the semiconductor industry, our customers drive the need for metrology as a major component of device manufacturing. These trends include:

• Proliferation of Optical Critical Dimension Metrology across Fabrication Processes. Device dimensions must be carefully controlled during each step of processing. These patterned structures are measured at many subsequent production stops including Chemical Mechanical Polishing, Etch, and Thin Film processing, all driving broader OCD adoption. Our proprietary OCD systems and software can provide the critical process control of these circuit dimensions that is necessary for successful manufacturing of these state-of-the-art devices. Nanometrics OCD technology is broadly adopted across NAND, DRAM, and logic semiconductor manufacturing processes.

• Proliferation of 3D Transistor Architectures. Our end customers continue to improve device density and performance by scaling front-end-of-line transistor architectures. Many of these designs, including FinFET transistors, have buried features and high aspect ratio stacked features that enable improved performance and density. The advanced designs require additional process control to manage the complex shapes and materials properties, driving additional applications of our systems.

• Proliferation of High-Density 3D-NAND. Our end customers have migrated to multi (many) layered high aspect ratio 3D-NAND devices. Many stacks of NAND cells are formed in parallel. These 3D-NAND architecture enables cost effective density scaling, removing the burden of density from lithography to deposition and etch processes. These devices require additional process control of deposition stacks, planarization processes, and critical high aspect ratio etch processes. Nanometrics thin films and OCD technologies are adopted across the 3D-NAND process including the periphery CMOS processing, NAND cell formation, and Interconnect of the devices.

• Adoption of New Types of Thin Film Materials. The need for ever increasing device circuit speed coupled with lower power consumption has pushed semiconductor device manufacturers to new materials and processing methods with single atom/sub nanometer control over these processes.

• Need for Improved Process Control to Drive Process Efficiencies. Competitive forces influencing semiconductor device manufacturers, such as price-cutting, shorter product life cycles and time to market, place pressure on manufacturers to rapidly achieve production efficiency. Device manufacturers are using our integrated and automated systems throughout the fabrication process to ensure that manufacturing processes scale rapidly, are accurate and can be repeated on a consistent basis.

Critical Accounting Policies and Estimates

The preparation of our financial statements conforms to accounting principles generally accepted in the United States of America, which requires management to make estimates and judgments in applying our accounting policies that have an important impact on our reported amounts of assets, liabilities, revenue, expenses and related disclosures at the date of our financial statements. On an ongoing basis, management evaluates its estimates including those related to bad debts, inventory valuations, warranty obligations, impairment and income taxes. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from management’s estimates.

There were no significant changes in our critical accounting policies during the nine months ended September 30, 2017. Please refer to Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in our Annual Report for a complete discussion of our critical accounting policies.

Recent Accounting Pronouncements

See Note 2 of the Unaudited Condensed Consolidated Financial Statements for a description of recent accounting pronouncements, including the respective dates of adoption and effects or anticipated effects on our results of operations and financial condition.

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Results of Operations

Net Revenues

Our net revenues comprised the following product lines (in thousands, except percentages):

	Three Months Ended									Nine Months Ended
	September 30, 2017		September 24, 2016		Change					September 30, 2017		September 24, 2016		Change
Automated systems	$	31,038	$	34,914	$	(3,876	)	-11.1	%	$	104,445	$	90,502	$	13,943		15.4	%
Integrated systems		7,655		10,233		(2,578	)	-25.2	%		27,534		37,038		(9,504	)	-25.7	%
Materials characterization systems		6,878		4,484		2,394		53.4	%		15,343		8,750		6,593		75.3	%
Total product revenue		45,571		49,631		(4,060	)	-8.2	%		147,322		136,290		11,032		8.1	%
Service		11,104		9,083		2,021		22.3	%		33,094		25,680		7,414		28.9	%
Total net revenues	$	56,675	$	58,714	$	(2,039	)	-3.5	%	$	180,416	$	161,970	$	18,446		11.4	%

For three months ended September 30, 2017, total net revenues decreased by $2.0 million relative to the comparable 2016 period. The decrease was due to a $4.0 million decrease in product revenue offset in part by an increase of $2.0 million in service revenue. The decrease in product revenue is primarily driven by lower Automated and Integrated System sales, which decreased in aggregate by $6.5 million due to the timing of investments in the Memory market. The increase in service revenue was primarily driven by higher spare parts sales and service contracts revenue, as a result of our increasing installed base.

For the nine months ended September 30, 2017, as compared to the same period in 2016, revenues increased by $18.4 million, or 11.4%. The increase was due to a $13.9 million increase in sales of Automated Systems (primarily the Atlas® line) due primarily to higher revenue from our customers in the Foundry market and a $6.6 million increase in Materials characterization systems sales, offset in part by a decrease of $9.5 million in Integrated systems sales due to the timing of investments in the Memory market. The increase in service revenue was primarily driven by higher billable service, contract and spare parts revenue, as a result of our increasing installed base.

  With a significant portion of the world’s semiconductor manufacturing capacity located in Asia, a substantial portion of our revenues continue to be generated in that region. Although sales to customers within individual countries of that region will vary from time to time, we expect that a substantial portion of our revenues will continue to be generated in Asia.

Gross margin

Our gross margin breakdown was as follows:

	Three Months Ended						Nine Months Ended
	September 30, 2017			September 24, 2016			September 30, 2017			September 24, 2016
Products		53.0	%		53.2	%		50.9	%		53.1	%
Service		58.4	%		44.2	%		53.6	%		42.7	%

The calculation of product gross margin includes both cost of products and amortization of intangibles. The gross margin on product revenue slightly decreased to 53.0% in the three months ended September 30, 2017 from 53.2% in the three months ended September 24, 2016. The decrease of 0.2 percentage points in the third quarter of 2017 was due to a slightly less favorable product and customer mix. The gross margin on our services business significantly increased to 58.4% in the three months ended September 30, 2017 from 44.2% in the three months ended September 24, 2016. The increase is due to improved margins for service parts, a more favorable service product mix, as well as higher service labor utilization.

The gross margin on product revenue decreased to 50.9% in the nine months ended September 30, 2017 from 53.1% in the nine months ended September 24, 2016, reflecting a decrease of 2.2 percentage points from the comparable 2016 period. The decrease was driven by the less favorable product and customer mix and higher installation and warranty costs. The gross margin on our services business increased to 53.6% in the nine months ended September 30, 2017 from 42.7% in the nine months ended September 24, 2016. The increase in gross margin is due to the increases in margin of service parts, a more favorable product mix and higher utilization of our service personnel.

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Operating expenses

Our operating expenses comprised the following categories (in thousands, except percentages):

	Three Months Ended									Nine Months Ended
	September 30, 2017		September 24, 2016		Change					September 30, 2017		September 24, 2016		Change
Research and Development	$	8,825	$	7,868	$	957		12.2	%	$	26,658	$	23,447	$	3,211		13.7	%
Selling		7,553		7,495		58		0.8	%		22,730		22,567		163		0.7	%
General and administrative		6,798		5,975		823		13.8	%		19,696		17,150		2,546		14.8	%
Amortization of intangible assets		—		—		—	NM				-		24		(24	)	-100.0	%
Total operating expenses	$	23,176	$	21,338	$	1,838		8.6	%	$	69,084	$	63,188	$	5,896		9.3	%

*NM = not meaningful

Research and development

Investments in research and development personnel and associated projects are part of our strategy to ensure our products remain competitive and meet customers’ needs. For the three months ended September 30, 2017, research and development costs increased by $1.0 million or 12.2%, compared to the same period in 2016. The increase was driven by additional headcount and higher spending in program related expenses to support continuing investments in our research and development efforts.

For the nine months ended September 30, 2017, research and development costs increased by $3.2 million or 13.7%, compared to the same period in 2016. The increase is primarily driven by additional headcount and higher spending in program related expenses to support continuing investments in our research and development efforts.

Selling

Selling expenses for the three and nine months ended September 30, 2017 compared to the same period in fiscal 2016 were relatively flat as increases of in personnel-related costs, professional services fees and travel related expenses, were offset by lower depreciation expense and other overhead costs.

General and administrative

General and administrative expenses increased by $0.8 million or 13.8% in the three months ended September 30, 2017 compared to the three months ended September 24, 2016. The increase was primarily due to increase variable compensation costs and recruiting expenses for our CEO search and higher professional services fees.

For the nine months ended September 30, 2017, general and administrative expenses increased by $2.5 million or 14.8%, compared to the same period in 2016. The increase is primarily driven by increase in variable compensation and recruiting costs associated with our CEO search and higher professional services fees.

Amortization of intangible assets

Amortization of intangible assets included in operating expenses in the nine months ended September 30, 2017 compared to the nine months ended September 24, 2016 decreased as a result of the full amortization of certain intangible assets.

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Other income (expense), net.

Our other income (expense), net, consisted of the following items (in thousands, except percentages):

	Three Months Ended											Nine Months Ended
	September 30, 2017			September 24, 2016			Change					September 30, 2017			September 24, 2016			Change
Interest Income	$	2		$	12		$	(10	)	-83.3	%	$	6		$	33		$	(27	)	-81.8	%
Interest Expense		(25	)		(92	)		67		-72.8	%		(84	)		(276	)		192		-69.6	%
Interest income (expense), net		(23	)		(80	)		57		-71.3	%		(78	)		(243	)		165		-67.9	%
Net gains on investments		366			116			250		215.5	%		932			271			661		243.9	%
Other gains (losses), net		(307	)		113			(420	)	-371.7	%		(602	)		(211	)		(391	)	185.3	%
Other income (loss), net		59			229			(170	)	-74.2	%		330			60			270		450.0	%
Total other income (expense), net	$	36		$	149		$	(113	)	-75.8	%	$	252		$	(183	)	$	435		-237.7	%

Other income (expense), net decreased by $0.1 million in the three months ended September 30, 2017 relative to the comparable 2016 period. The change was principally due to unfavorable foreign exchange net gains and losses, offset in part by an increase in net investment gains which is in line with the increase in our cash and cash equivalents balance in the fiscal year 2017 compared to the same period in 2016.

For the nine months ended September 30, 2017, other income (expense), net increased $0.4 million relative to the comparable 2016 period. The change was principally due to an increase in investment income, which is in line with the increase in our cash and cash equivalents balance in the fiscal year 2017 compared to the same period in 2016, offset in part by unfavorable net revaluation of certain monetary assets and liabilities denominated in foreign currencies, net of foreign currency exchange forward contracts gains and losses.

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Provision for income taxes

We recorded a tax provision of $1.8 million and $1.3 million for the three months ended September 30, 2017 and September 24, 2016, respectively. The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the three months ending September 24, 2016 as we were, at that time, recording a valuation allowance against our U.S. deferred tax assets.

We recorded a tax provision of $4.5 million and $2.6 million for the nine months ended September 30, 2017 and September 24, 2016, respectively.  The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the nine months ending September 24, 2016 as we were, at that time, recording a valuation allowance against our U.S. deferred tax assets.  The increase in the tax provision is also due to an increase in our profitability for the nine months ended September 30, 2017.  

Our provision for income taxes for the three and nine months ended September 30, 2017 of $1.8 million and $4.5 million, respectively, reflects an effective tax rate of 23.3% and 18.8%, respectively. The tax rate for the three and nine months ended September 30, 2017 differs from the Federal statutory rate of 35.0% primarily due to foreign income being subject to tax at lower rates, tax benefits associated with the settlement of equity options/awards, tax benefits from federal R&D credits, and a one-time benefit related to an entity classification change.  

As of September 30, 2017, we continue to maintain a valuation allowance against our California and certain foreign deferred tax assets as a result of uncertainties regarding the realization of the asset due to cumulative losses and uncertainty of future taxable income. We will continue to assess the realizability of the deferred tax assets in each of the applicable jurisdictions and maintain the valuation allowances until sufficient positive evidence exists to support a reversal. In the event we determine that the deferred tax assets are realizable, an adjustment to the valuation allowance will be reflected in the tax provision for the period such determination is made.

We are subject to taxation in the U.S. and various states including California, and foreign jurisdictions including Korea, Japan, Taiwan, China, Singapore, U.K., Germany, France, and Israel. Due to tax attribute carry-forwards, we are subject to examination for tax years 2003 forward for U.S. tax purposes. We are also subject to examination in various states for tax years 2002 forward. We are subject to examination for tax years 2007 forward for various foreign jurisdictions.

We accrue interest and penalties related to unrecognized tax benefits in our provision for income taxes. The total amount of penalties and interest were not material as of September 30, 2017 and September 24, 2016. During the next twelve months, we anticipate increases in our unrecognized tax benefits of approximately $0.4 million.

Liquidity and Capital Resources

Our principal sources of liquidity are cash and cash equivalents, and marketable securities, and cash flow generated from our operations. Our liquidity is affected by many factors, including those that relate to our specific operations and those that relate to the uncertainties of global and regional economies and the sectors of the semiconductor industry in which we operate in. Although our cash requirements will fluctuate based on the timing and extent of these factors, we believe our existing cash, cash equivalents and marketable securities, combined with cash currently projected to be generated from our operations, will be sufficient to satisfy our working capital needs, capital asset purchases, outstanding commitments and other liquidity requirements associated with our existing operations over the next twelve months.

The following tables present selected financial information and statistics as of September 30, 2017 and December 31, 2016 and for the nine months ended September 30, 2017 and September 24, 2016 (in millions):

	As of
	September 30, 2017		December 31, 2016
Cash, cash equivalents and marketable securities	$	140.4	$	130.0
Working capital	$	205.8	$	174.4

	Nine Months Ended
	September 30, 2017			September 24, 2016
Cash provided by operating activities	$	15.4		$	34.1
Cash used in investing activities	$	(17.8	)	$	(39.6	)
Cash provided by (used in) financing activities	$	(0.2	)	$	4.1

Cash, cash equivalents and marketable securities totaled $140.4 million at September 30, 2017, which reflects an increase of $10.4 million from December 31, 2016. Of our total cash, cash equivalents and marketable securities at September 30, 2017, approximately $15.0 million were held by foreign subsidiaries, a portion of which would have to be repatriated to the United States.

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We currently do not intend nor foresee a need to repatriate these funds and do not rely on unrepatriated earnings as a source of funds for our domestic business. We believe we have sufficient cash flow and borrowing capacity in the United States to fund our domestic operations and strategic needs.

Working capital was $205.8 million at September 30, 2017, which reflects an increase of $31.4 million when compared to $174.4 million at December 31, 2016.

Cash provided by operating activities during the nine months ended September 30, 2017 was $15.4 million, consisting primarily of net income of $19.4 million, adjusted for non-cash items of $15.7 million, partially offset by $19.7 million of net cash outflows related to changes in operating assets and liabilities. The changes in operating assets and liabilities are generally driven by the timing of our customer payments for accounts receivable and the timing of inventory purchases and the associated vendor payments for accounts payable. We expect that cash provided by operating activities may fluctuate in future periods due to several factors, including variations in our operating results, accounts receivable collections performance, inventory and supply chain management, vendor payment initiatives, tax benefits or charges from stock-based compensation, and the timing and amount of compensation and other payments. Cash used in investing activities of $17.8 million during the nine months ended September 30, 2017 consisted primarily of $105.0 million purchases of marketable securities and payments for acquisition of property, plant and equipment and certain assets of $4.3 million, net of sales and maturities of marketable securities of $91.5 million. Cash used in financing activities of $0.2 million during the nine months ended September 30, 2017 consisted primarily of $3.8 million cash paid for taxes on net issuance of stock awards, partially offset by proceeds from the issuance of common stock from the employee stock purchase program and the exercise of stock options of $3.6 million.

Cash provided by operating activities of $34.1 million during the nine months ended September 24, 2016 was a result of $17.4 million of net income, and non-cash adjustments to net income of $13.6 million partially offset by a net change in operating assets and liabilities of $3.1 million. The changes in operating assets and liabilities are generally driven by the timing of customer payments for accounts receivable and timing of vendor payments for accounts payable. Cash used in investing activities of $39.6 million during the nine months ended September 24, 2016 consisted primarily of $63.8 million of purchases of marketable securities, net of sales and maturities of $27.5 million, and acquisition of property, plant and equipment of $3.3 million.  Cash provided by financing activities of $4.1 million during the nine months ended September 24, 2016 consisted primarily of $6.0 million in proceeds from the issuance of common stock from the employee stock purchase program and the exercise of stock options, partially offset by cash paid for taxes on net issuance of stock awards of $1.6 million, and royalty payments to Zygo of $0.3 million.

Off-Balance Sheet Arrangements

As of September 30, 2017, we had no off-balance sheet arrangements or obligations.

Contractual Obligations

There have been no material changes outside the ordinary course of our business from those reported in our Annual Report on Form 10-K.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our exposure to market risk does not differ materially from that discussed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed with the SEC on March 3, 2017. However, we cannot give any assurance as to the effect that future changes in interest rates or foreign currency rates will have on our consolidated financial position, results of operations or cash flows.

Foreign Currency Risk

Our exposure to foreign currency exchange rate fluctuations arises in part from intercompany balances in which costs are charged between our U.S. headquarters and our foreign subsidiaries. On our consolidated balance sheet these intercompany balances are eliminated and thus no consolidated balances are associated with these intercompany balances; however, since each foreign entity's functional currency is generally its respective local currency, there is exposure to foreign exchange risk on a consolidated basis for transactions not denominated in each foreign entity’s functional currencies. Intercompany balances are denominated primarily in U.S. dollars and, to a lesser extent, other local currencies.

We enter into foreign currency forward exchange contracts to protect against currency exchange risks associated with existing assets and liabilities. A foreign currency forward exchange contract acts as a hedge by increasing in value when underlying assets decrease in value or underlying liabilities increase in value due to changes in foreign exchange rates. Conversely, a foreign currency forward exchange contract decreases in value when underlying assets increase in value or underlying liabilities decrease in value due to changes in foreign exchange rates. These forward contracts are not designated as accounting hedges, so the unrealized gains and

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losses are recognized in other income (expense), net, in advance of the actual foreign currency cash flows with the fair value of these forward contracts being recorded as accrued liabilities or other current assets.

We do not use forward contracts for trading purposes. Our forward contracts generally have maturities of 30 days or less. We enter into foreign currency forward exchange contracts based on estimated future asset and liability exposures, and the effectiveness of our hedging program depends on our ability to estimate these future asset and liability exposures. Recognized gains and losses with respect to our current hedging activities will ultimately depend on how accurately we are able to match the amount of foreign currency forward exchange contracts with actual underlying asset and liability exposures.

We actively monitor our foreign currency risks, but there is no guarantee that our foreign currency hedging activities will substantially offset the impact of fluctuations in currency exchange rates on our results of operations, cash flows and financial position. See “Note 3, Fair Value Measurement and Disclosures” in the Notes to Consolidated Financial Statements for more information regarding our derivatives and hedging activities.

Interest Rate Risk

Our exposure to market risk resulting from changes in interest rates relates primarily to our investment portfolio. As of September 30, 2017 and December 31, 2016, we held $96.3 million and $82.9 million, respectively, in marketable securities. The fair value of our marketable securities could be adversely impacted due to a rise in interest rates, but we do not believe such impact would be material. Securities with longer maturities are subject to a greater interest rate risk than those with shorter maturities and as of September 30, 2017 and December 31, 2016, the average duration of our portfolio was less than nine months. We do not hold securities for trading purposes.

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ITEM 4.CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management evaluated, with the participation of our Chief Executive Officer (“CEO”), and our Chief Financial Officer (“CFO”), the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on the evaluation, our CEO and CFO concluded that as of September 30, 2017, our disclosure controls and procedures were not effective as a result of the material weakness in our internal control over financial reporting, as described in the Report of Management on Internal Control over Financial Reporting in Item 9A of our Annual Report on Form 10-K for the year ended December 31, 2016, which continues to exist as of September 30, 2017.

Notwithstanding the identified material weakness, management, including our CEO and CFO, believes the consolidated financial statements included in this Quarterly Report on Form 10-Q fairly represent in all material respects our financial condition, results of operations and cash flows at and for the periods presented in accordance with U.S. GAAP

Remediation Plan  

As disclosed in Item 9A of our Annual Report on Form 10-K for the year ended December 31, 2016, our management concluded that our internal control over financial reporting was not effective at December 31, 2016.

Management identified the following material weakness in the Company’s internal control over financial reporting as of December 31, 2016:

The Company did not design and maintain an effective control over the existence of inventories subject to the cycle count program. Specifically, the control was not effectively designed and maintained to verify all inventories that should be subject to the cycle count program were included and were counted at the frequency levels required under the Company’s policies. This control deficiency did not result in a material adjustment to the inventory and cost accounts and disclosures for the year ended December 31, 2016. However, this control deficiency could result in misstatements of the aforementioned accounts and disclosures that would result in a material misstatement to the annual or interim consolidated financial statements that would not be prevented or detected. Accordingly, our management has determined that this control deficiency constitutes a material weakness that had not been remediated as of September 30, 2017.

We are actively engaged in completing the remediation initiatives to improve the Company’s internal control which we began implementing in the beginning of fiscal 2017.

A summary of the remediation plan is provided below.

The Company has developed a plan of remediation to strengthen our overall controls over accounting for the existence of inventories subject to our cycle count program. Additionally, we have updated the Company’s part master with the correct cycle-count frequency requirements.

To address the material weakness, the following remedial actions have been implemented:

• Implementation of additional quarterly reporting and monitoring controls over additions to or changes to the Company’s item master records.

• Design of an automated methodology for determining and assigning the frequency levels each item should be counted.

Our goal is to remediate this material weakness by the end of fiscal 2017, subject to there being sufficient opportunities to conclude, through testing, that the enhanced control is designed and operating effectively.

Changes in Internal Control over Financial Reporting

During the quarter ended September 30, 2017, there were no changes in our internal controls over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

Our management, including our CEO and CFO, has designed our disclosure controls and procedures and our internal control over financial reporting to provide reasonable assurances that the controls’ objectives will be met. However, management does not expect that disclosure controls and procedures or our internal control over financial reporting will prevent or detect all error and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the

30

control system’s objectives will be met. The design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, within Nanometrics have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any system’s design will succeed in achieving its stated goals under all potential future conditions. Projections of any evaluation of a system’s control effectiveness into future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

31

PART II — OTHER INFORMATION

ITEM 1 LEGAL PROCEEDINGS

The information set forth under Note 9. Commitments and Contingencies of Notes to Consolidated Financial Statements in Part I, Item 1 of this Quarterly Report on Form 10-Q is incorporated herein by reference.

32

ITEM 1A. RISK FACTORS

Investing in our securities involves a high degree of risk. In assessing these risks, you should carefully consider the information included in this report, including our financial statements and the related notes thereto. You should carefully review and consider all of the risk factors set forth in Part l, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed with the SEC on March 3, 2017. The risks described in our Annual Report on Form 10-K are not the only ones we face. Additional risks and uncertainties that are not currently known to us or that we currently believe are immaterial may also impair our business operations. Our business, operating results and financial conditions could be materially harmed by any of these risks. The trading price of our common stock could decline due to any of these risks and investors may lose all or part of their investment. There have been no material changes in our risk factors from those discussed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

33

ITEM 6. EXHIBITS

The following exhibits are filed, furnished or incorporated by reference with this Quarterly Report on Form 10-Q:

Exhibit No.	Description
3.(i)	Certificate of Incorporation
3.1(1)	Certificate of Incorporation of the Registrant
3.(ii)	Bylaws
3.2 (2)	Bylaws of the Registrant
4	Instruments Defining the Rights of Security Holders, Including Indentures
4.1	Reference is made to Exhibits 3.1 and 3.2
10	Material Contracts
10.1 (3)	Transition and Consulting Agreement, dated as of August 9, 2017, between Nanometrics Incorporated and Timothy J. Stultz.
31	Rule 13a-14(a)/15d-14(a) Certifications
31.1^	Certification of Timothy J. Stultz, principal executive officer of the Registrant, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2^	Certification of Jeffrey Andreson, principal financial officer and principal accounting officer of the Registrant, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32	Section 1350 Certifications
32.1*	Certification of Timothy J. Stultz, principal executive officer of the Registrant, and Jeffrey Andreson, principal financial officer and principal accounting officer of the Registrant pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101*	The following financial statements, formatted in XBRL: (i) Condensed Consolidated Balance Sheets at September 30, 2017, and December 31, 2016, (ii) Condensed Consolidated Statements of Operations for the three and three months ended September 30, 2017 and September 24, 2016, (iii) Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and September 24, 2016, and (v) Notes to Unaudited Condensed Consolidated Financial Statements.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

(1) Incorporated by reference to Exhibit 3.1 filed with the Registrant’s Current Report on Form 8-K (File No. 000-13470) filed with the SEC on October 5, 2006.

(2)	Incorporated by reference to Exhibit 3.1 filed with the Registrant’s Current Report on Form 8-K (File No. 000-13470) filed with the SEC on April 12, 2012.
(3)	Incorporated by reference to Exhibit 10.1 filed with the Registrant’s Current Report on Form 8-K (File No. 000-13470) filed with the SEC on August 11, 2017.

^ Filed herewith.

* Furnished herewith

34

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

NANOMETRICS INCORPORATED
(Registrant)
By:	/S/    JEFFREY ANDRESON
	Jeffrey Andreson
	Chief Financial Officer
	(Duly Authorized and Principal Financial Officer)

Dated: November 3, 2017

35

EX-31.1

Exhibit 31.1

I, Timothy J. Stultz, the Chief Executive Officer of Nanometrics Incorporated, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Nanometrics Incorporated;

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

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

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

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

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

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

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

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

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

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

Date:	November 3, 2017
By:	/s/ Timothy J. Stultz
	Timothy J. Stultz
	Chief Executive Officer

EX-31.2

Exhibit 31.2

I, Jeffrey Andreson, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Nanometrics Incorporated;

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

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

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

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

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

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

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

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

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

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

Date:	November 3, 2017
By:	/s/ Jeffrey Andreson
	Jeffrey Andreson
	Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Timothy J. Stultz, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge, the Quarterly Report of Nanometrics Incorporated on Form 10-Q for the quarterly period ended September 30, 2017 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Nanometrics Incorporated.

November 3, 2017	/s/ Timothy J. Stultz
	Timothy J. Stultz
	Chief Executive Officer

I, Jeffrey Andreson, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge, the Quarterly Report of Nanometrics Incorporated on Form 10-Q for the quarterly period ended September 30, 2017 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Nanometrics Incorporated.

November 3, 2017	/s/ Jeffrey Andreson
	Jeffrey Andreson
	Chief Financial Officer

This certification accompanies the Quarterly Report on Form 10-Q for the period ended September 30, 2017 of Nanometrics Incorporated (the “Company”) pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed “filed” by the Company or incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, made before or after the date of this Quarterly Report and irrespective of any general incorporation language contained in such filing.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	NANOMETRICS INC
Entity Central Index Key	0000704532
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	NANO
Current Fiscal Year End Date	--12-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		25,594,642

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 44,041	$ 47,062
Marketable securities	96,316	82,899
Accounts receivable, net of allowances of $69 and $73, respectively	41,261	39,457
Inventories	55,020	38,837
Inventories-delivered systems	3,320	2,457
Prepaid expenses and other	9,910	5,667
Total current assets	249,868	216,379
Property, plant and equipment, net	42,317	44,226
Goodwill	10,099	8,940
Intangible assets, net	2,258	412
Deferred income tax assets	16,472	17,399
Other assets	389	474
Total assets	321,403	287,830
Current liabilities:
Accounts payable	17,180	11,342
Accrued payroll and related expenses	10,260	12,656
Deferred revenue	7,229	9,168
Other current liabilities	7,704	8,047
Income taxes payable	1,689	813
Total current liabilities	44,062	42,026
Deferred revenue	1,551	816
Income taxes payable	907	841
Deferred tax liability	21	20
Other long-term liabilities	377	353
Total liabilities	46,918	44,056
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value; 3,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value, 47,000,000 shares authorized: 25,567,220 and 25,070,889, respectively, issued and outstanding	26	25
Additional paid-in capital	278,722	271,969
Accumulated deficit	(1,685)	(22,174)
Accumulated other comprehensive income (loss)	(2,578)	(6,046)
Total stockholders’ equity	274,485	243,774
Total liabilities and stockholders’ equity	$ 321,403	$ 287,830

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Allowances for doubtful accounts	$ 69	$ 73
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	47,000,000	47,000,000
Common stock, shares issued	25,567,220	25,070,889
Common stock, shares outstanding	25,567,220	25,070,889

XML

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Net revenues:
Products	$ 45,571	$ 49,631	$ 147,322	$ 136,290
Service	11,104	9,083	33,094	25,680
Total net revenues	56,675	58,714	180,416	161,970
Costs of net revenues:
Cost of products	21,349	22,810	72,164	62,625
Cost of service	4,614	5,066	15,368	14,714
Amortization of intangible assets	52	434	156	1,311
Total costs of net revenues	26,015	28,310	87,688	78,650
Gross profit	30,660	30,404	92,728	83,320
Operating expenses:
Research and development	8,825	7,868	26,658	23,447
Selling	7,553	7,495	22,730	22,567
General and administrative	6,798	5,975	19,696	17,150
Amortization of intangible assets	0	0	0	24
Total operating expenses	23,176	21,338	69,084	63,188
Income from operations	7,484	9,066	23,644	20,132
Other income (expense):
Interest income	2	12	6	33
Interest expense	(25)	(92)	(84)	(276)
Other income, net	59	229	330	60
Total other income (expense), net	36	149	252	(183)
Income before income taxes	7,520	9,215	23,896	19,949
Provision for income taxes	1,756	1,332	4,492	2,568
Net income	$ 5,764	$ 7,883	$ 19,404	$ 17,381
Net income per share:
Basic (in dollars per share)	$ 0.23	$ 0.32	$ 0.77	$ 0.71
Diluted (in dollars per share)	$ 0.22	$ 0.31	$ 0.75	$ 0.70
Weighted average shares used in per share calculation:
Basic (in shares)	25,494	24,826	25,320	24,550
Diluted (in shares)	25,932	25,282	25,933	24,979

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 5,764	$ 7,883	$ 19,404	$ 17,381
Other comprehensive income (loss):
Change in foreign currency translation adjustment	764	519	3,470	2,018
Net change on unrealized gains (losses) on available-for-sale investments	15	1	(2)	73
Other comprehensive income:	779	520	3,468	2,091
Comprehensive income	$ 6,543	$ 8,403	$ 22,872	$ 19,472

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016
Cash flows from operating activities:
Net income	$ 19,404	$ 17,381
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	5,219	6,440
Stock-based compensation	6,775	5,432
Disposal of fixed assets	98	162
Inventory write-down	1,412	1,451
Deferred income taxes	2,153	(14)
Changes in fair value of contingent payments to Zygo Corporation		158
Changes in assets and liabilities:
Accounts receivable	1,418	(986)
Inventories	(16,828)	6,652
Inventories-delivered systems	(864)	(1,560)
Prepaid expenses and other	(3,850)	889
Accounts payable, accrued and other liabilities	709	(4,310)
Deferred revenue	(1,204)	3,825
Income taxes payable	942	(1,419)
Net cash provided by operating activities	15,384	34,101
Cash flows from investing activities:
Payments to acquire certain assets	(2,000)
Sales of marketable securities	28,624	2,093
Maturities of marketable securities	62,923	25,461
Purchases of marketable securities	(104,984)	(63,840)
Purchases of property, plant and equipment	(2,342)	(3,349)
Net cash used in investing activities	(17,779)	(39,635)
Cash flows from financing activities:
Payments to Zygo Corporation related to acquisition		(315)
Proceeds from sale of shares under employee stock option plans and purchase plan	3,678	5,984
Taxes paid on net issuance of stock awards	(3,838)	(1,578)
Net cash provided by (used in) financing activities	(160)	4,091
Effect of exchange rate changes on cash and cash equivalents	(466)	710
Net decrease in cash and cash equivalents	(3,021)	(733)
Cash and cash equivalents, beginning of period	47,062	38,154
Cash and cash equivalents, end of period	44,041	37,421
Supplemental disclosure of non-cash investing activities:
Transfer of inventory to property, plant and equipment, net		$ 1,208
Transfer of property, plant and equipment to inventory, net	$ 205

XML

Nature of Business and Basis of Presentation

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Nature of Business and Basis of Presentation

Note 1. Nature of Business and Basis of Presentation

Description of Business – Nanometrics Incorporated (“Nanometrics” or the “Company”) and its wholly-owned subsidiaries design, manufacture, market, sell and support optical critical dimension (“OCD”), thin film and overlay dimension metrology and inspection systems used primarily in the manufacturing of semiconductors, solar photovoltaics (“solar PV”) and high-brightness LEDs (“HB-LED”), as well as by customers in the silicon wafer and data storage industries. Nanometrics’ metrology systems precisely measure a wide range of film types deposited on substrates during manufacturing to control manufacturing processes and increase production yields in the fabrication of integrated circuits. The Company’s OCD technology is a patented critical dimension measurement technology that is used to precisely determine the dimensions on the semiconductor wafer that directly control the resulting performance of the integrated circuit devices. The thin film metrology systems use a broad spectrum of wavelengths, high-sensitivity optics, proprietary software, and patented technology to measure the thickness and uniformity of films deposited on silicon and other substrates as well as their chemical composition. The overlay metrology systems are used to measure the overlay accuracy of successive layers of semiconductor patterns on wafers in the photolithography process. Nanometrics’ inspection systems are used to find defects on patterned and unpatterned wafers at nearly every stage of the semiconductor production flow. The corporate headquarters of Nanometrics is located in Milpitas, California.

Basis of Presentation – The accompanying condensed consolidated financial statements (“financial statements”) have been prepared on a consistent basis with the audited consolidated financial statements as of December 31, 2016, and include all normal recurring adjustments necessary to fairly state the information set forth therein. All significant intercompany accounts and transactions have been eliminated in consolidation.

The financial statements have been prepared in accordance with the regulations of the United States Securities and Exchange Commission (“SEC”) for interim periods in accordance with S-X Article 10, and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The operating results for interim periods are not necessarily indicative of the operating results that may be expected for the entire year. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the fiscal year ended December 31, 2016, which were included in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2017.

Fiscal Period – The Company uses a 52/53 week fiscal year ending on the last Saturday of the calendar year. All references to the quarter refer to Nanometrics’ fiscal quarter. The fiscal quarters reported herein are 13 week periods.

Use of Estimates – The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ materially from those estimates. Estimates are used for, but not limited to, revenue recognition, the provision for doubtful accounts, the provision for excess, obsolete, or slow-moving inventories, valuation of intangible and long-lived assets, warranty accruals, income taxes, valuation of stock-based compensation, and contingencies.

Revenue Recognition –  The Company derives revenue from the sale of process control metrology and inspection systems and related upgrades (“product revenue”) as well as spare part sales, billable service and service contracts (together “service revenue”). Upgrades are system software and hardware performance upgrades that extend the features and functionality of a product. Upgrades are included in product revenue, which consists of sales of complete, advanced process control metrology and inspection systems (the “system(s)”). Nanometrics’ systems consist of hardware and software components that function together to deliver the essential functionality of the system. Arrangements for sales of systems and upgrades often include defined customer-specified acceptance criteria.

In summary, the Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller's price is fixed or determinable, and collectability is reasonably assured.

For repeat product sales to existing customers, revenue recognition occurs at the time title and risk of loss transfer to the customer, which usually occurs upon shipment from the Company's manufacturing location, if it can be reliably demonstrated that the product has successfully met the defined customer specified acceptance criteria and all other recognition criteria have been met. For initial sales where the product has not previously met the defined customer specified acceptance criteria, product revenues are recognized upon the earlier of receipt of written customer acceptance or expiration of the contractual acceptance period. In Japan, where contractual terms with the customer specify risk of loss and title transfers upon customer acceptance, revenue is recognized upon receipt of written customer acceptance, provided that all other recognition criteria have been met.

The Company warrants its products against defects in manufacturing. Upon recognition of product revenue, a liability is recorded for anticipated warranty costs. On occasion, customers request a warranty period longer than the Company's standard warranty. In those instances, where extended warranty services are separately quoted to the customer, the associated revenue is deferred and recognized as service revenue ratably over the term of the extended warranty period. The portion of service contracts and extended warranty services agreements that are uncompleted at the end of any reporting period are included in deferred revenue.

The Company sells software that is considered to be an upgrade to a customer's existing systems. These standalone software upgrades are not essential to the tangible product's functionality and are accounted for under software revenue recognition rules which require vendor specific objective evidence (“VSOE”) of fair value to allocate revenue in a multiple element arrangement. Revenue from software sales is recognized when the software is delivered to the customer, provided that all other recognition criteria have been met.

The majority of other upgrades are sold based on published specifications. For basic upgrades, revenue is recognized at the time title and risk of loss transfer to the customer which is usually upon shipment. For complex and extensive upgrades, specific acceptance or prior acceptance for a similar upgrade is required in order to recognize revenue.

Revenue related to spare parts is recognized upon shipment. Revenue related to billable services is recognized as the services are performed. Service contracts may be purchased by the customer during or after the warranty period and revenue is recognized ratably over the service contract period.

Frequently, the Company delivers products and various services in a single transaction. The Company's deliverables consist of tools, installation, upgrades, billable services, spare parts, and service contracts. The Company's typical multi-element arrangements include a sale of one or multiple tools that include installation and standard warranty. Other arrangements consist of a sale of tools bundled with service elements or delivery of different types of services. The Company's tools, upgrades, and spare parts are generally delivered to customers within a period of up to six months from order date. Installation is usually performed soon after delivery of the tool. The portion of revenue associated with installation is deferred based on relative selling price and that revenue is recognized upon completion of the installation and receipt of final acceptance. Billable services are billed on a time and materials basis and performed as requested by customers. Under service contract arrangements, services are provided as needed over the fixed arrangement term, which terms can be up to twelve months. The Company does not grant its customers a general right of return or any refund terms and imposes a penalty on orders cancelled prior to the scheduled shipment date.

The Company evaluates its revenue arrangements to identify deliverables and to determine whether these deliverables are separable into multiple units of accounting. The Company allocates the arrangement consideration among the deliverables based on relative selling prices. The Company has established VSOE for some of its products and services when a substantial majority of selling prices falls within a narrow range when sold separately. For deliverables with no established VSOE, the Company uses best estimate of selling price to determine standalone selling price for such deliverable. The Company does not use third party evidence to determine standalone selling price since this information is not widely available in the market as the Company's products contain a significant element of proprietary technology and the solutions offered differ substantially from competitors. The Company has established a process for developing estimated selling prices, which incorporates historical selling prices, the effect of market conditions, gross margin objectives, pricing practices, as well as entity-specific factors. The Company monitors and evaluates estimated selling price on a regular basis to ensure that changes in circumstances are accounted for in a timely manner.

When certain elements in multiple-element arrangements are not delivered, or accepted at the end of a reporting period, the relative selling prices of undelivered elements are deferred until these elements are delivered and/or accepted. If deliverables cannot be accounted for as separate units of accounting, the entire arrangement is accounted for as a single unit of accounting and revenue is deferred until all elements are delivered and all revenue recognition requirements are met.

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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2017

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

Note 2. Recent Accounting Pronouncements

Accounting Standards Adopted

In March 2016, the FASB issued an accounting standards update that simplifies several aspects of the accounting for share-based payment award transactions, including income tax consequences, classification of awards as equity or liability, and classification on the statement of cash flows. The new standard requires adoption of certain amendments relevant to the Company to be applied using a modified retrospective transition method by means of cumulative effect adjustment to retained earnings as of the beginning of the fiscal year 2017.

The new standard permits entities to make an accounting policy election related to how forfeitures will impact the recognition of compensation cost for stock-based compensation. The Company has elected to account for forfeitures as they occur and adopted this change on a modified retrospective basis. The cumulative effect of this change resulted in a $0.1 million increase to accumulated deficit as of January 1, 2017.

Furthermore, the standard requires excess tax benefits and tax deficiencies to be recorded in the income statement when the awards vest or are settled rather than paid-in capital. The Company recorded the cumulative effect of this change as a $1.2 million reduction to accumulated deficit in the first quarter of fiscal 2017 to reflect the recognition of excess tax benefits in prior years, with a corresponding adjustment to deferred tax assets and long-term tax liabilities. The Company adopted the guidance related to the recognition of excess tax benefits and deficiencies as income tax expense or benefit on a modified retrospective basis. In addition, the Company elected to report cash flows related to excess tax benefits on a prospective basis. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to the Company’s statement of cash flows since such cash flows have historically been presented as a financing activity. 

In July 2015, the FASB issued an accounting standards update which simplifies the measurement of inventory by requiring inventory to be measured at the lower of cost and net realizable value. The new standard applies only to inventories for which cost is determined by methods other than last-in-first-out and the retail inventory method. Effective in the first quarter of fiscal 2017, the Company adopted this guidance. The adoption of this guidance did not have a significant impact on the Company’s consolidated financial condition and results of operation.

Accounting Standards Not Yet Adopted

In January 2017, the Financial Accounting Standards Board (the "FASB") issued an accounting standard update which simplifies the subsequent measurement of goodwill and removes step 2 from the goodwill impairment test. Instead, an entity should record an impairment charge based on excess of a reporting unit’s carrying amount over its fair value. The standard is effective for public companies for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated financial condition and results of operations.

In October 2016, the FASB issued an accounting standard update which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This standard will be effective for annual reporting periods beginning after December 15, 2017, including interim reporting period within those annual periods. Early adoption is permitted. This standard update is required to be adopted using the modified retrospective approach, with a cumulative catch-up adjustment to retained earnings in the period of adoption. The Company is currently evaluating the impact of adopting this standard on its consolidated financial condition and results of operations.

In August 2016, the FASB issued an accounting standard which addresses eight specific cash flow classification issues. This update is effective for public companies for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period, and all the amendments must be adopted in the same period. The standard is to be applied through a retrospective transition method to each period presented. If it is impracticable to apply retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated statement of cash flows.

In June 2016, the FASB issued an accounting standard which requires measurement and timely recognition of expected credit losses for financial assets. The update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The standard is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company is currently evaluating the effect of this update on its consolidated financial condition and results of operations.

In February 2016, the FASB issued an accounting standards update which requires lessees to record a right-of-use asset and a corresponding lease liability on the balance sheet (with the exception of short-term leases). For lessees, leases will continue to be classified as either operating or financing in the income statement. The standard is effective for public companies for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. This standard is required to be applied with a modified retrospective transition approach. The Company generally does not finance purchases of equipment or other capital, but does lease some equipment and facilities. The Company is currently evaluating the impact of this standard on its consolidated financial statements and related disclosures but anticipates most its existing operating lease commitments will be recognized as operating lease liabilities and right-of-use assets.

In May 2014, the FASB issued an accounting standards update which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB deferred for one year the effective date of the new revenue standard, with early adoption permitted but not earlier than the original effective date. Consequently, the new standard will be effective for the Company on December 31, 2017 and the Company does not plan to adopt early.

Based on the Company’s current assessment, the Company expects to adopt the new guidance in the first quarter of fiscal 2018 by using the modified retrospective method of transition. While the Company continues to assess the impact of the new standard, the Company believes that the timing of revenue recognition for certain systems and performance obligations, will generally occur earlier than under current revenue recognition guidance. Under current U.S. GAAP, revenue for certain systems or performance obligations is delayed until formal customer sign-off has occurred and/or contractual obligations have been met, whereas under the new standard, revenue should be recorded when transfer of control has occurred, which is normally upon shipment. While the Company currently expects revenue related to these arrangements to remain unchanged in total, the nature of when control transfers may change the timing of revenue recognition.  Additionally, the Company believes the adoption of the new standard will most likely not result in a different set of performance obligations, when compared to current GAAP.  The Company further believes that required changes to its current business processes and IT systems, to comply with the new standard, will be minor in nature.  Other aspects of the standard, including the capitalization of costs related to the acquisition and/or fulfillment of the Company’s contracts are still being evaluated, but the Company believes impacts will be either minor or immaterial.  The Company is currently evaluating the impact of the new standard on the Company’s contracts with customers and will continue to monitor industry activities and other guidance provided by the accounting profession and regulators and adjust its approach and implementation plans as required.

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Fair Value Measurements and Disclosures

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements and Disclosures

Note 3. Fair Value Measurements and Disclosures

The Company determines the fair values of its financial instruments based on the fair value hierarchy established in FASB Accounting Standards Codification (“ASC”) 820, Fair Value Measurement, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into the following three levels that may be used to measure fair value:

Level 1 — Quoted prices in active markets for identical assets or liabilities.

Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 — Unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities. Such unobservable inputs include an estimated discount rate used in the Company’s discounted present value analysis of future cash flows, which reflects the Company’s estimate of debt with similar terms in the current credit markets. As there is currently minimal activity in such markets, the actual rate could be materially different.

Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The standard assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability.

The following tables present the Company’s assets and liabilities measured at estimated fair value on a recurring basis, excluding accrued interest components, categorized in accordance with the fair value hierarchy (in thousands), as of the following dates:

	September 30, 2017								December 31, 2016
	Fair Value Measurements Using Input Types								Fair Value Measurements Using Input Types
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	812	$	—	$	—	$	812	$	959	$	—	$	—	$	959
Commercial paper and corporate debt    securities		—		4,994		—		4,994		—		2,499		—		2,499
Total cash equivalents	$	812	$	4,994	$	—	$	5,806	$	959	$	2,499	$	—	$	3,458
Marketable securities:
U.S. Treasury securities and U.S. Government agency debt securities		—		2,497		—		2,497		—		17,072		—		17,072
Certificates of deposits		—		23,298		—		23,298		—		23,019		—		23,019
Commercial paper		—		17,910		—		17,910		—		22,402		—		22,402
Municipal securities and corporate debt securities		—		45,697		—		45,697		—		14,943		—		14,943
Asset-backed Securities		—		6,914		—		6,914		—		5,463		—		5,463
Total marketable securities	$	—	$	96,316	$	—	$	96,316	$	-	$	82,899	$	—	$	82,899
Total(1)	$	812	$	101,310	$	—	$	102,122	$	959	$	85,398	$	—	$	86,357

⁽¹⁾ Excludes $38.2 million and $43.6 million held in operating accounts as of September 30, 2017 and December 31, 2016, respectively. See “Note 4. Cash and Investments” of the Notes to Consolidated Financial Statements for more information.

The fair values of the marketable securities that are classified as Level 1 in the table above were derived from quoted market prices for identical assets or liabilities in active markets that the Company has the ability to access. The fair value of marketable securities that are classified as Level 2 in the table above were derived from non-binding market consensus prices that were corroborated by observable market data, quoted market prices for similar instruments, or pricing models, such as discounted cash flow techniques with all significant inputs derived from or corroborated by observable market data. There were no transfers of instruments between Level 1, Level 2 and Level 3 during the financial periods presented.

Derivatives

The Company uses foreign currency exchange forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in foreign currencies. These derivatives are carried at fair value with changes recorded in other income (expense), net in the consolidated statements of operations. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. The derivatives have maturities of approximately 30 days.

The settlement of forward foreign currency contracts included in the three months ended September 30, 2017 and September 24, 2016 was a gain of $0.3 million and $0.1 million, respectively. The settlement of forward foreign currency contracts included in the nine months ended September 30, 2017 and September 24, 2016 was a gain of $1.0 million and a loss of $1.2 million, respectively. These are included in other income (expense), net, in the consolidated statements of operations.

The following table presents the notional amounts and fair values of the Company’s outstanding derivative instruments in U.S. Dollar equivalent (in millions):

	As of September 30, 2017						As of December 31, 2016
			Fair Value						Fair Value
	Notional Amount		Asset		Liability		Notional Amount		Asset		Liability
Undesignated Hedges:
Forward Foreign Currency Contracts
Purchase	$	21.6		—	$	0.1	$	12.6		—		—
Sell	$	16.6		—	$	0.1	$	1.3		—		—

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Cash and Investments

9 Months Ended

Sep. 30, 2017

Investments Debt And Equity Securities [Abstract]

Cash and Investments

Note 4. Cash and Investments

The following tables present cash, cash equivalents, and available-for-sale investments as of the following dates (in thousands):

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	38,235	$	—	$	—		$	38,235
Cash equivalents:
Money market funds		812		—		—			812
Commercial paper and corporate debt securities		4,994		—		—			4,994
Marketable securities:
U.S. Treasury securities		501		—		—			501
U.S. Government agency securities		2,001		—		(5	)		1,996
Certificate of deposits		23,298		—		—			23,298
Commercial paper		17,907		3		—			17,910
Corporate debt securities		45,701		—		(4	)		45,697
Asset-backed securities		6,916		—		(2	)		6,914
Total cash, cash equivalents, and marketable securities	$	140,365	$	3	$	(11	)	$	140,357
	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	43,604	$	—	$	—		$	43,604
Cash equivalents:
Money market funds		959		—		—			959
Commercial paper and corporate debt securities		2,499		—		—			2,499
Marketable securities:
U.S. Treasury securities		5,667		—		—			5,667
U.S. Government agency securities		11,412		—		(7	)		11,405
Certificates of deposits		23,000		19		—			23,019
Commercial paper		22,402		—		—			22,402
Corporate debt securities		14,194		—		(6	)		14,188
Municipal securities		756		—		(1	)		755
Asset-backed securities		5,466		—		(3	)		5,463
Total cash, cash equivalents, and marketable securities	$	129,959	$	19	$	(17	)	$	129,961

Available-for-sale marketable securities, readily convertible to cash, with maturity dates of 90 days or less are classified as cash equivalents, while those with maturity dates greater than 90 days are classified as marketable securities within short-term assets. All marketable securities as of September 30, 2017 and December 31, 2016, were available-for-sale and reported at fair value based on the estimated or quoted market prices as of the balance sheet date.

Realized gains and losses on sale of securities are recorded in other income (expense), net, in the Company’s statement of operations. For the three months ended September 30, 2017 and September 24, 2016, net realized gains and losses were not material. For the nine months ended September 30, 2017 and September 24, 2016, net realized gains and losses were $0.9 million and $0.3 million, respectively.

Unrealized gains or losses, net of tax effect, are recorded in accumulated other comprehensive income (loss) within stockholders’ equity. Both the gross unrealized gains and gross unrealized losses for the three and nine months ended September 30, 2017 and September 24, 2016 were not material and no marketable securities had other than temporary impairment.

All marketable securities as of September 30, 2017 and December 31, 2016, had maturity dates of less than two years.

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Accounts Receivable

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

Accounts Receivable

Note 5. Accounts Receivable

The Company maintains arrangements under which eligible accounts receivable in Japan are sold without recourse to unrelated third-party financial institutions. These receivables were not included in the consolidated balance sheets as the criteria for sale treatment had been met. The Company pays administrative fees as well as interest ranging from 0.61% to 1.68% based on the anticipated length of time between the date the sale is consummated and the expected collection date of the receivables sold.

The Company sold $6.1 million and $10.1 million of receivables during the three months ended September 30, 2017 and September 24, 2016, respectively, and $15.5 and $29.6 million of receivables during the nine months ended September 30, 2017 and September 24, 2016. There were no material gains or losses on the sale of such receivables. There were no amounts due from such third party financial institutions at September 30, 2017 and December 31, 2016.

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Financial Statement Components

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Financial Statement Components

Note 6. Financial Statement Components

The following tables provide details of selected financial statement components as of the following dates (in thousands):

	At
	September 30, 2017			December 31, 2016
Inventories:
Raw materials and sub-assemblies	$	31,772		$	23,506
Work in process		18,280			10,347
Finished goods		4,968			4,984
Inventories		55,020			38,837
Inventories-delivered systems		3,320			2,457
Total inventories	$	58,340		$	41,294
Property, plant and equipment, net:(1)
Land	$	15,571		$	15,568
Building and improvements		20,649			20,532
Machinery and equipment		35,428			35,659
Furniture and fixtures		2,289			2,282
Software		9,261			9,756
Capital in progress		1,825			2,748
Total property, plant and equipment, gross		85,023			86,545
Accumulated depreciation and amortization		(42,706	)		(42,319	)
Total property, plant and equipment, net	$	42,317		$	44,226
(1) Total depreciation and amortization expense was $1.6 million and $1.7 million for the three months ended September 30, 2017 and September 24, 2016, respectively, and $5.1 million for both nine months ended September 30, 2017 and September 24, 2016.
Other Current Liabilities:
Accrued warranty	$	4,542		$	3,838
Customer deposits		67			581
Retrofit liability		353			432
Accrued professional services		784			424
Accrued royalties		60			1,233
Other		1,898			1,539
Total other current liabilities	$	7,704		$	8,047

Components of Accumulated Other Comprehensive Income (Loss)

	Foreign Currency Translations			Defined Benefit Pension Plans			Unrealized Income (Loss) on Investment			Accumulated Other Comprehensive Income
Balance as of December 31, 2016	$	(5,817	)	$	(227	)	$	(2	)	$	(6,046	)
Current period change		3,470			—			(2	)		3,468
Balance as of September 30, 2017	$	(2,347	)	$	(227	)	$	(4	)	$	(2,578	)

The items above, except for unrealized income (loss) on investment, did not impact the Company’s income tax provision. The amounts reclassified from each component of accumulated other comprehensive income (loss) into income statement line items were insignificant.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Note 7. Goodwill and Intangible Assets

The following table summarizes the activity in the Company’s goodwill during the nine months ended September 30, 2017:

	(in thousands)
Balance as of December 31, 2016	$	8,940
Foreign currency movements		1,159
Balance as of September 30, 2017	$	10,099

Finite-lived intangible assets are recorded at cost, less accumulated amortization. Finite-lived intangible assets as of September 30, 2017 and December 31, 2016 consisted of the following (in thousands):

	September 30, 2017
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	18,758	$	(16,517	)	$	2,241
Customer relationships		9,426		(9,426	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,235	)		17
Trademark		80		(80	)		—
Total	$	32,443	$	(30,185	)	$	2,258

	December 31, 2016
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	15,726	$	(15,380	)	$	346
Customer relationships		9,322		(9,322	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,186	)		66
Trademark		80		(80	)		—
Total	$	29,307	$	(28,895	)	$	412

The amortization of finite-lived intangibles is computed using the straight-line method. Estimated lives of finite-lived intangibles range from two to ten years. The total amortization expense for the three months ended September 30, 2017 and September 24, 2016 was $0.1 million and $0.4 million, respectively. Total amortization expense for the nine months ended September 30, 2017 and September 24, 2016 was $0.2 million and $1.3 million, respectively.

There were no impairment charges related to intangible assets recorded during the three and nine months ended September 30, 2017 and September 24, 2016.

The estimated future amortization expense of finite intangible assets as of September 30, 2017 is as follows (in thousands):

Fiscal Years	Amounts
2017 (remaining three months)		52
2018		283
2019		352
2020		286
Thereafter		1,285
Total future amortization expense	$	2,258

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Warranties

9 Months Ended

Sep. 30, 2017

Product Warranties Disclosures [Abstract]

Warranties

Note 8. Warranties

The Company generally sells its products with a 12 months repair or replacement warranty from the date of acceptance or shipment date. The Company provides an accrual for estimated future warranty costs based upon the historical relationship of warranty costs to the cost of products sold. The estimated future warranty obligations related to product sales are recorded in the period in which the related revenue is recognized. The estimated future warranty obligations are affected by the warranty periods, sales volumes, product failure rates, material usage, and labor and replacement costs incurred in correcting a product failure. If actual product failure rates, material usage, labor or replacement costs were to differ from the Company’s estimates, revisions to the estimated warranty obligations would be required. For new product introductions where limited or no historical information exists, the Company may use warranty information from other previous product introductions to guide it in estimating its warranty accrual.

Components of the warranty accrual, which were included in the accompanying condensed consolidated balance sheets with other current liabilities, were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30, 2017			September 24, 2016			September 30, 2017			September 24, 2016
Balance as of beginning of period	$	4,602		$	4,556		$	3,838		$	4,504
Accruals for warranties issued during period		1,020			1,100			3,800			3,529
Settlements during the period		(1,080	)		(1,471	)		(3,096	)		(3,848	)
Balance as of end of period	$	4,542		$	4,185		$	4,542		$	4,185

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 9. Commitments and Contingencies

Intellectual Property Indemnification Obligations – The Company will, from time to time, in the normal course of business, agree to indemnify certain customers, vendors or others against third party claims that the Company’s products, when used for their intended purpose(s), or the Company’s intellectual property, infringe the intellectual property rights of such third parties or other claims made against parties with whom it enters into contractual relationships. It is not possible to determine the maximum potential amount of liability under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances that are likely to be involved in each particular claim. Historically, the Company has not made payments under these obligations and believes that the estimated fair value of these agreements is immaterial. Accordingly, no liabilities have been recorded for these obligations in the accompanying condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016.

Legal Proceedings - From time to time, the Company is subject to various legal proceedings or claims arising in the ordinary course of business.

On August 2, 2017, the Company was named as defendant in a complaint filed in New Hampshire Superior Court (“Complaint”). The Complaint, brought by Optical Solutions,  Inc. (“OSI”), alleges claims arising from a purported exclusive purchase contract between OSI and the Company pertaining to certain product. On September 18, 2017, the Company removed the action to the United States District Court for the District of New Hampshire. On September 25, 2017, the Company moved to transfer the Complaint to the Northern District of California and to dismiss all claims in the Complaint for lack of personal jurisdiction and for failure to state a claim. On September 27, 2017, OSI filed a motion to remand. OSI has not yet responded to the Company’s motions to transfer or dismiss.

The Company records a provision for a loss when it believes that it is both probable that a loss has been incurred and the amount can be reasonably estimated. Based on current information, the Company believes it does not have any probable and reasonably estimable losses related to any current legal proceedings and claims. Although it is difficult to predict the outcome of legal proceedings, the Company believes that any liability that may ultimately arise from the resolution of these ordinary course matters will not have a material adverse effect on the business, financial condition and results of operations.

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Net Income Per Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Net Income Per Share

Note 10. Net Income Per Share

The Company presents both basic and diluted net income per share on the face of its condensed consolidated statements of operations. Basic net income per share excludes the effect of potentially dilutive shares and is computed by dividing net income by the weighted-average number of shares of common stock outstanding for the period. Diluted net income per share is computed using the weighted-average number of shares of common stock outstanding for the period plus the effect of all dilutive securities representing potential shares of common stock outstanding during the period.

A reconciliation of the share denominator of the basic and diluted net income per share computations for three and nine months ended September 30, 2017 and September 24, 2016 is as follows (in thousands):

	Three Month Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Weighted average common shares outstanding used in    basic net income (loss) per share calculation		25,494		24,826		25,320		24,550
Potential dilutive common stock equivalents,    using treasury stock method		438		456		613		429
Weighted average shares used in diluted net income    (loss) per share calculation		25,932		25,282		25,933		24,979

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Stockholders' Equity and Stock-Based Compensation

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stockholders' Equity and Stock-Based Compensation

Note 11. Stockholders’ Equity and Stock-Based Compensation

Options and Employee Stock Purchase Plan (“ESPP”) Awards

The fair value of each option and ESPP award is estimated on the grant date using the Black-Scholes valuation model and the assumptions noted in the following table. The expected lives of options granted were calculated using the simplified method allowed by the Staff Accounting Bulletin No. 107, Share-Based Payment. The risk-free rates were based on the U.S Treasury rates in effect during the corresponding period of grant. The expected volatility was based on the historical volatility of the Company’s stock price. The dividend yield reflects that the Company has not paid any cash dividends since inception and does not intend to pay any cash dividends in the foreseeable future.

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017			September 24, 2016
Employee Stock Purchase Plan:
Expected life	0.5 years		0.5 years		0.5 years			0.5 years
Volatility		38.9%		38.2%		37.2	%		38.7%
Risk free interest rate		1.13%		0.37%		0.91	%		0.44%
Dividends		—		—		—			—

No stock options were awarded during the nine months ended September 30, 2017 and September 24, 2016, respectively.

A summary of activity of stock options during the nine months ended September 30, 2017 is as follows:

	Number of Shares Outstanding (Options)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (inThousands)
Options
Outstanding at December 31, 2016		440,545		$	15.06		2.12	$	4,405
Exercised		(180,629	)	$	13.58
Cancelled		(855	)	$	16.63
Outstanding at September 30, 2017		259,061		$	16.09		1.81	$	3,293
Exercisable at September 30, 2017		255,665		$	16.06		1.79	$	3,256

The aggregate intrinsic value in the above table represents the total pretax intrinsic value, based on the Company’s closing stock price of $28.80 as of September 29, 2017, the last trading day of the quarter, which would have been received by the option holders had all option holders exercised their options as of that date. The total intrinsic value of options exercised during the three months ended September 30, 2017 and September 24, 2016 was $1.0 million and $0.5 million, respectively, and during the nine months ended September 30, 2017 and September 24, 2016 was $2.4 and $1.9 million, respectively. 

Restricted Stock Units (“RSUs”)

Time-based RSUs are valued using the market value of the Company’s common stock on the date of grant, assuming no expectation of dividends paid.

A summary of activity for RSUs is as follows:

Summary of activity for RSUs	Number of RSUs			Weighted Average Fair Value
Outstanding RSUs as of December 31, 2016		819,785		$	16.79
Granted		340,070		$	27.29
Released		(356,619	)	$	16.79
Cancelled		(44,046	)	$	17.21
Outstanding RSUs as of September 30, 2017		759,190		$	21.48

Market-Based Performance Stock Units (“PSUs”)

In addition to granting RSUs that vest on the passage of time only, the Company granted PSUs to key executives. The PSUs vest in three equal tranches over one, two and three years based on the relative performance of the Company’s stock during those periods, compared to a peer group over the same period. If target stock price performance is achieved, 66.7% of the shares of the Company’s common stock subject to the PSUs will vest. Up to a maximum of 100% of the shares subject to the PSUs will vest if the maximum stock price performance is achieved for each tranche.

A summary of activity for PSUs is as follows:

Summary of activity for PSUs	Number of PSUs			Weighted Average Fair Value
Outstanding PSUs as of December 31, 2016		107,500		$	9.94
Granted		59,550			26.75
Released		(38,500	)		10.41
Cancelled		(4,000	)		12.64
Outstanding PSUs as of September 30, 2017		124,550		$	17.86

The preceding table reflects the maximum awards that can be achieved upon full vesting.

Valuation of PSUs

On the date of grant, the Company estimated the fair value of PSUs using a Monte Carlo simulation model. The assumptions for the valuation of PSUs are summarized as follows:

	2017 Award		2016 Award
Grant Date Fair Value Per Share		26.75	$	8.52
Weighted-average assumptions/inputs:
Expected Dividend		—		—
Range of risk-free interest rates		1.40%		0.92%
Range of expected volatilities for peer group	23%-62%		22%-93%

Stock-based Compensation Expense

Stock-based compensation expense for all share-based payment awards made to the Company’s employees and directors pursuant to the employee stock option and employee stock purchase plans by function were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Cost of products	$	216	$	116	$	628	$	273
Cost of service		161		138		463		355
Research and development		509		387		1,262		985
Selling		639		537		1,707		1,492
General and administrative		922		822		2,715		2,327
Total stock-based compensation expense related to employee stock options and employee stock purchases	$	2,447	$	2,000	$	6,775	$	5,432

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Income Taxes

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Income Taxes

Note 12. Income Taxes

The Company accounts for income taxes under the provisions of ASC 740, Accounting for Income Taxes. The Company adjusts its effective tax rate each quarter to be consistent with the estimated annual effective tax rate. The Company also records the tax effect of unusual or infrequently occurring discrete items, including changes in judgment about valuation allowances and effects of changes in tax laws or tax rates, in the interim period in which they occur. The Company's effective tax rate reflects the impact of a portion of its earnings being taxed in foreign jurisdictions as well as a valuation allowance maintained on certain deferred tax assets.

The provision for income taxes consists of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Provision for income taxes	$	1,756	$	1,332	$	4,492	$	2,568

The Company recorded a tax provision of $1.8 million and $1.3 million for the three months ended September 30, 2017 and September 24, 2016, respectively. The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the three months ending September 24, 2016 as the Company, at that time, was recording a valuation allowance against its U.S. deferred tax assets.

The Company recorded a tax provision of $4.5 million and $2.6 million for the nine months ended September 30, 2017 and September 24, 2016, respectively. The increase in the tax provision for 2017 from 2016 was primarily related to the additional utilization of U.S. deferred tax assets for the nine months ending September 24, 2016 as the Company, at that time, was recording a valuation allowance against its U.S. deferred tax assets.  The increase in the tax provision is also due to an increase in Company’s profitability for the nine months ended September 30, 2017.

The Company continues to maintain a valuation allowance against its California and certain foreign deferred tax assets as a result of uncertainties regarding the realization of the assets due to cumulative losses and uncertainty of future taxable income. The Company will continue to assess the realizability of the deferred tax assets in each of the applicable jurisdictions and maintain the valuation allowances until sufficient positive evidence exists to support a reversal. In the event the Company determines that the deferred tax assets are realizable, an adjustment to the valuation allowance will be reflected in the tax provision for the period such determination is made.

The Company is subject to taxation in the U.S. and various states including California, and foreign jurisdictions including Korea, Japan, Taiwan, China, Singapore, Germany, U.K., France, and Israel. Due to tax attribute carry-forwards, the Company is subject to examination for tax years 2003 forward for U.S. tax purposes. The Company is also subject to examination in various states for tax years 2002 forward. The Company is subject to examination for tax years 2007 forward for various foreign jurisdictions.

The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. The total amount of penalties and interest were not material as of September 30, 2017 and September 24, 2016. During the next twelve months, the Company anticipates increases in its unrecognized tax benefits of approximately $0.4 million.

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Segment, Geographic, Product and Significant Customer Information

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment, Geographic, Product and Significant Customer Information

Note 13. Segment, Geographic, Product and Significant Customer Information

The Company has one operating segment, which is the sale, design, manufacture, marketing and support of optical critical dimension and thin film systems. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Total net revenues (1):
South Korea	$	22,269	$	15,710	$	72,388	$	35,226
Japan		4,781		11,765		17,400		24,669
United States		6,231		8,211		28,101		24,306
China		3,403		7,364		17,420		33,883
Taiwan		2,304		6,334		19,016		16,962
Singapore		9,774		5,078		12,229		18,645
Other		7,913		4,252		13,862		8,279
Total net revenues	$	56,675	$	58,714	$	180,416	$	161,970

	September 30, 2017		December 31, 2016
Long-lived tangible assets:
United States	$	41,002	$	42,688
International		1,315		1,538
Total long-lived tangible assets	$	42,317	$	44,226

The following customers accounted for 10% or more of total accounts receivable, net:

	At
	September 30, 2017		December 31, 2016
Samsung Electronics Co. Ltd.		23%		14%
Micron Technology, Inc.		27%		12%
Taiwan Semiconductor Manufacturing Company Limited	***			20%
Intel Corporation		11%		11%
Toshiba Corporation	***			10%

*** The customer accounted for less than 10% of total accounts receivable, net, as of that period end.

The following customers accounted for 10% or more of total net revenues:

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Samsung Electronics Co. Ltd.		32%	***			28%	***
SK Hynix	***			19%		15%		14%
Intel Corporation		14%		19%		12%		19%
Micron Technology, Inc.		19%		15%		11%		25%

*** The customer accounted for less than 10% of total net revenues during the period.

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Nature of Business and Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Description of Business

Description of Business – Nanometrics Incorporated (“Nanometrics” or the “Company”) and its wholly-owned subsidiaries design, manufacture, market, sell and support optical critical dimension (“OCD”), thin film and overlay dimension metrology and inspection systems used primarily in the manufacturing of semiconductors, solar photovoltaics (“solar PV”) and high-brightness LEDs (“HB-LED”), as well as by customers in the silicon wafer and data storage industries. Nanometrics’ metrology systems precisely measure a wide range of film types deposited on substrates during manufacturing to control manufacturing processes and increase production yields in the fabrication of integrated circuits. The Company’s OCD technology is a patented critical dimension measurement technology that is used to precisely determine the dimensions on the semiconductor wafer that directly control the resulting performance of the integrated circuit devices. The thin film metrology systems use a broad spectrum of wavelengths, high-sensitivity optics, proprietary software, and patented technology to measure the thickness and uniformity of films deposited on silicon and other substrates as well as their chemical composition. The overlay metrology systems are used to measure the overlay accuracy of successive layers of semiconductor patterns on wafers in the photolithography process. Nanometrics’ inspection systems are used to find defects on patterned and unpatterned wafers at nearly every stage of the semiconductor production flow. The corporate headquarters of Nanometrics is located in Milpitas, California.

Basis of Presentation

Basis of Presentation – The accompanying condensed consolidated financial statements (“financial statements”) have been prepared on a consistent basis with the audited consolidated financial statements as of December 31, 2016, and include all normal recurring adjustments necessary to fairly state the information set forth therein. All significant intercompany accounts and transactions have been eliminated in consolidation.

The financial statements have been prepared in accordance with the regulations of the United States Securities and Exchange Commission (“SEC”) for interim periods in accordance with S-X Article 10, and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The operating results for interim periods are not necessarily indicative of the operating results that may be expected for the entire year. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the fiscal year ended December 31, 2016, which were included in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2017.

Fiscal Period

Fiscal Period – The Company uses a 52/53 week fiscal year ending on the last Saturday of the calendar year. All references to the quarter refer to Nanometrics’ fiscal quarter. The fiscal quarters reported herein are 13 week periods.

Use of Estimates

Use of Estimates – The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ materially from those estimates. Estimates are used for, but not limited to, revenue recognition, the provision for doubtful accounts, the provision for excess, obsolete, or slow-moving inventories, valuation of intangible and long-lived assets, warranty accruals, income taxes, valuation of stock-based compensation, and contingencies.

Revenue Recognition

Revenue Recognition –  The Company derives revenue from the sale of process control metrology and inspection systems and related upgrades (“product revenue”) as well as spare part sales, billable service and service contracts (together “service revenue”). Upgrades are system software and hardware performance upgrades that extend the features and functionality of a product. Upgrades are included in product revenue, which consists of sales of complete, advanced process control metrology and inspection systems (the “system(s)”). Nanometrics’ systems consist of hardware and software components that function together to deliver the essential functionality of the system. Arrangements for sales of systems and upgrades often include defined customer-specified acceptance criteria.

In summary, the Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller's price is fixed or determinable, and collectability is reasonably assured.

For repeat product sales to existing customers, revenue recognition occurs at the time title and risk of loss transfer to the customer, which usually occurs upon shipment from the Company's manufacturing location, if it can be reliably demonstrated that the product has successfully met the defined customer specified acceptance criteria and all other recognition criteria have been met. For initial sales where the product has not previously met the defined customer specified acceptance criteria, product revenues are recognized upon the earlier of receipt of written customer acceptance or expiration of the contractual acceptance period. In Japan, where contractual terms with the customer specify risk of loss and title transfers upon customer acceptance, revenue is recognized upon receipt of written customer acceptance, provided that all other recognition criteria have been met.

The Company warrants its products against defects in manufacturing. Upon recognition of product revenue, a liability is recorded for anticipated warranty costs. On occasion, customers request a warranty period longer than the Company's standard warranty. In those instances, where extended warranty services are separately quoted to the customer, the associated revenue is deferred and recognized as service revenue ratably over the term of the extended warranty period. The portion of service contracts and extended warranty services agreements that are uncompleted at the end of any reporting period are included in deferred revenue.

The Company sells software that is considered to be an upgrade to a customer's existing systems. These standalone software upgrades are not essential to the tangible product's functionality and are accounted for under software revenue recognition rules which require vendor specific objective evidence (“VSOE”) of fair value to allocate revenue in a multiple element arrangement. Revenue from software sales is recognized when the software is delivered to the customer, provided that all other recognition criteria have been met.

The majority of other upgrades are sold based on published specifications. For basic upgrades, revenue is recognized at the time title and risk of loss transfer to the customer which is usually upon shipment. For complex and extensive upgrades, specific acceptance or prior acceptance for a similar upgrade is required in order to recognize revenue.

Revenue related to spare parts is recognized upon shipment. Revenue related to billable services is recognized as the services are performed. Service contracts may be purchased by the customer during or after the warranty period and revenue is recognized ratably over the service contract period.

Frequently, the Company delivers products and various services in a single transaction. The Company's deliverables consist of tools, installation, upgrades, billable services, spare parts, and service contracts. The Company's typical multi-element arrangements include a sale of one or multiple tools that include installation and standard warranty. Other arrangements consist of a sale of tools bundled with service elements or delivery of different types of services. The Company's tools, upgrades, and spare parts are generally delivered to customers within a period of up to six months from order date. Installation is usually performed soon after delivery of the tool. The portion of revenue associated with installation is deferred based on relative selling price and that revenue is recognized upon completion of the installation and receipt of final acceptance. Billable services are billed on a time and materials basis and performed as requested by customers. Under service contract arrangements, services are provided as needed over the fixed arrangement term, which terms can be up to twelve months. The Company does not grant its customers a general right of return or any refund terms and imposes a penalty on orders cancelled prior to the scheduled shipment date.

The Company evaluates its revenue arrangements to identify deliverables and to determine whether these deliverables are separable into multiple units of accounting. The Company allocates the arrangement consideration among the deliverables based on relative selling prices. The Company has established VSOE for some of its products and services when a substantial majority of selling prices falls within a narrow range when sold separately. For deliverables with no established VSOE, the Company uses best estimate of selling price to determine standalone selling price for such deliverable. The Company does not use third party evidence to determine standalone selling price since this information is not widely available in the market as the Company's products contain a significant element of proprietary technology and the solutions offered differ substantially from competitors. The Company has established a process for developing estimated selling prices, which incorporates historical selling prices, the effect of market conditions, gross margin objectives, pricing practices, as well as entity-specific factors. The Company monitors and evaluates estimated selling price on a regular basis to ensure that changes in circumstances are accounted for in a timely manner.

When certain elements in multiple-element arrangements are not delivered, or accepted at the end of a reporting period, the relative selling prices of undelivered elements are deferred until these elements are delivered and/or accepted. If deliverables cannot be accounted for as separate units of accounting, the entire arrangement is accounted for as a single unit of accounting and revenue is deferred until all elements are delivered and all revenue recognition requirements are met.

Accounting Standards Adopted

Accounting Standards Adopted

In March 2016, the FASB issued an accounting standards update that simplifies several aspects of the accounting for share-based payment award transactions, including income tax consequences, classification of awards as equity or liability, and classification on the statement of cash flows. The new standard requires adoption of certain amendments relevant to the Company to be applied using a modified retrospective transition method by means of cumulative effect adjustment to retained earnings as of the beginning of the fiscal year 2017.

The new standard permits entities to make an accounting policy election related to how forfeitures will impact the recognition of compensation cost for stock-based compensation. The Company has elected to account for forfeitures as they occur and adopted this change on a modified retrospective basis. The cumulative effect of this change resulted in a $0.1 million increase to accumulated deficit as of January 1, 2017.

Furthermore, the standard requires excess tax benefits and tax deficiencies to be recorded in the income statement when the awards vest or are settled rather than paid-in capital. The Company recorded the cumulative effect of this change as a $1.2 million reduction to accumulated deficit in the first quarter of fiscal 2017 to reflect the recognition of excess tax benefits in prior years, with a corresponding adjustment to deferred tax assets and long-term tax liabilities. The Company adopted the guidance related to the recognition of excess tax benefits and deficiencies as income tax expense or benefit on a modified retrospective basis. In addition, the Company elected to report cash flows related to excess tax benefits on a prospective basis. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to the Company’s statement of cash flows since such cash flows have historically been presented as a financing activity. 

In July 2015, the FASB issued an accounting standards update which simplifies the measurement of inventory by requiring inventory to be measured at the lower of cost and net realizable value. The new standard applies only to inventories for which cost is determined by methods other than last-in-first-out and the retail inventory method. Effective in the first quarter of fiscal 2017, the Company adopted this guidance. The adoption of this guidance did not have a significant impact on the Company’s consolidated financial condition and results of operation.

Accounting Standards Not Yet Adopted

Accounting Standards Not Yet Adopted

In January 2017, the Financial Accounting Standards Board (the "FASB") issued an accounting standard update which simplifies the subsequent measurement of goodwill and removes step 2 from the goodwill impairment test. Instead, an entity should record an impairment charge based on excess of a reporting unit’s carrying amount over its fair value. The standard is effective for public companies for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated financial condition and results of operations.

In October 2016, the FASB issued an accounting standard update which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This standard will be effective for annual reporting periods beginning after December 15, 2017, including interim reporting period within those annual periods. Early adoption is permitted. This standard update is required to be adopted using the modified retrospective approach, with a cumulative catch-up adjustment to retained earnings in the period of adoption. The Company is currently evaluating the impact of adopting this standard on its consolidated financial condition and results of operations.

In August 2016, the FASB issued an accounting standard which addresses eight specific cash flow classification issues. This update is effective for public companies for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period, and all the amendments must be adopted in the same period. The standard is to be applied through a retrospective transition method to each period presented. If it is impracticable to apply retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The adoption of this guidance is not expected to have a significant impact on the Company’s consolidated statement of cash flows.

In June 2016, the FASB issued an accounting standard which requires measurement and timely recognition of expected credit losses for financial assets. The update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The standard is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company is currently evaluating the effect of this update on its consolidated financial condition and results of operations.

In February 2016, the FASB issued an accounting standards update which requires lessees to record a right-of-use asset and a corresponding lease liability on the balance sheet (with the exception of short-term leases). For lessees, leases will continue to be classified as either operating or financing in the income statement. The standard is effective for public companies for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. This standard is required to be applied with a modified retrospective transition approach. The Company generally does not finance purchases of equipment or other capital, but does lease some equipment and facilities. The Company is currently evaluating the impact of this standard on its consolidated financial statements and related disclosures but anticipates most its existing operating lease commitments will be recognized as operating lease liabilities and right-of-use assets.

In May 2014, the FASB issued an accounting standards update which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB deferred for one year the effective date of the new revenue standard, with early adoption permitted but not earlier than the original effective date. Consequently, the new standard will be effective for the Company on December 31, 2017 and the Company does not plan to adopt early.

Based on the Company’s current assessment, the Company expects to adopt the new guidance in the first quarter of fiscal 2018 by using the modified retrospective method of transition. While the Company continues to assess the impact of the new standard, the Company believes that the timing of revenue recognition for certain systems and performance obligations, will generally occur earlier than under current revenue recognition guidance. Under current U.S. GAAP, revenue for certain systems or performance obligations is delayed until formal customer sign-off has occurred and/or contractual obligations have been met, whereas under the new standard, revenue should be recorded when transfer of control has occurred, which is normally upon shipment. While the Company currently expects revenue related to these arrangements to remain unchanged in total, the nature of when control transfers may change the timing of revenue recognition.  Additionally, the Company believes the adoption of the new standard will most likely not result in a different set of performance obligations, when compared to current GAAP.  The Company further believes that required changes to its current business processes and IT systems, to comply with the new standard, will be minor in nature.  Other aspects of the standard, including the capitalization of costs related to the acquisition and/or fulfillment of the Company’s contracts are still being evaluated, but the Company believes impacts will be either minor or immaterial.  The Company is currently evaluating the impact of the new standard on the Company’s contracts with customers and will continue to monitor industry activities and other guidance provided by the accounting profession and regulators and adjust its approach and implementation plans as required.

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Fair Value Measurements and Disclosures (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Assets and liabilities measurements at estimated fair value on recurring basis excluding accrued interest components

The following tables present the Company’s assets and liabilities measured at estimated fair value on a recurring basis, excluding accrued interest components, categorized in accordance with the fair value hierarchy (in thousands), as of the following dates:

	September 30, 2017								December 31, 2016
	Fair Value Measurements Using Input Types								Fair Value Measurements Using Input Types
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	812	$	—	$	—	$	812	$	959	$	—	$	—	$	959
Commercial paper and corporate debt    securities		—		4,994		—		4,994		—		2,499		—		2,499
Total cash equivalents	$	812	$	4,994	$	—	$	5,806	$	959	$	2,499	$	—	$	3,458
Marketable securities:
U.S. Treasury securities and U.S. Government agency debt securities		—		2,497		—		2,497		—		17,072		—		17,072
Certificates of deposits		—		23,298		—		23,298		—		23,019		—		23,019
Commercial paper		—		17,910		—		17,910		—		22,402		—		22,402
Municipal securities and corporate debt securities		—		45,697		—		45,697		—		14,943		—		14,943
Asset-backed Securities		—		6,914		—		6,914		—		5,463		—		5,463
Total marketable securities	$	—	$	96,316	$	—	$	96,316	$	-	$	82,899	$	—	$	82,899
Total(1)	$	812	$	101,310	$	—	$	102,122	$	959	$	85,398	$	—	$	86,357

⁽¹⁾ Excludes $38.2 million and $43.6 million held in operating accounts as of September 30, 2017 and December 31, 2016, respectively. See “Note 4. Cash and Investments” of the Notes to Consolidated Financial Statements for more information.

Notional amounts and fair values of outstanding derivative instruments

The following table presents the notional amounts and fair values of the Company’s outstanding derivative instruments in U.S. Dollar equivalent (in millions):

	As of September 30, 2017						As of December 31, 2016
			Fair Value						Fair Value
	Notional Amount		Asset		Liability		Notional Amount		Asset		Liability
Undesignated Hedges:
Forward Foreign Currency Contracts
Purchase	$	21.6		—	$	0.1	$	12.6		—		—
Sell	$	16.6		—	$	0.1	$	1.3		—		—

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Cash and Investments (Tables)

9 Months Ended

Sep. 30, 2017

Investments Debt And Equity Securities [Abstract]

Cash, Cash Equivalents and Available-for-Sale Investments

The following tables present cash, cash equivalents, and available-for-sale investments as of the following dates (in thousands):

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	38,235	$	—	$	—		$	38,235
Cash equivalents:
Money market funds		812		—		—			812
Commercial paper and corporate debt securities		4,994		—		—			4,994
Marketable securities:
U.S. Treasury securities		501		—		—			501
U.S. Government agency securities		2,001		—		(5	)		1,996
Certificate of deposits		23,298		—		—			23,298
Commercial paper		17,907		3		—			17,910
Corporate debt securities		45,701		—		(4	)		45,697
Asset-backed securities		6,916		—		(2	)		6,914
Total cash, cash equivalents, and marketable securities	$	140,365	$	3	$	(11	)	$	140,357
	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	43,604	$	—	$	—		$	43,604
Cash equivalents:
Money market funds		959		—		—			959
Commercial paper and corporate debt securities		2,499		—		—			2,499
Marketable securities:
U.S. Treasury securities		5,667		—		—			5,667
U.S. Government agency securities		11,412		—		(7	)		11,405
Certificates of deposits		23,000		19		—			23,019
Commercial paper		22,402		—		—			22,402
Corporate debt securities		14,194		—		(6	)		14,188
Municipal securities		756		—		(1	)		755
Asset-backed securities		5,466		—		(3	)		5,463
Total cash, cash equivalents, and marketable securities	$	129,959	$	19	$	(17	)	$	129,961

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Financial Statement Components (Tables)

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Selected financial statement components

The following tables provide details of selected financial statement components as of the following dates (in thousands):

	At
	September 30, 2017			December 31, 2016
Inventories:
Raw materials and sub-assemblies	$	31,772		$	23,506
Work in process		18,280			10,347
Finished goods		4,968			4,984
Inventories		55,020			38,837
Inventories-delivered systems		3,320			2,457
Total inventories	$	58,340		$	41,294
Property, plant and equipment, net:(1)
Land	$	15,571		$	15,568
Building and improvements		20,649			20,532
Machinery and equipment		35,428			35,659
Furniture and fixtures		2,289			2,282
Software		9,261			9,756
Capital in progress		1,825			2,748
Total property, plant and equipment, gross		85,023			86,545
Accumulated depreciation and amortization		(42,706	)		(42,319	)
Total property, plant and equipment, net	$	42,317		$	44,226
(1) Total depreciation and amortization expense was $1.6 million and $1.7 million for the three months ended September 30, 2017 and September 24, 2016, respectively, and $5.1 million for both nine months ended September 30, 2017 and September 24, 2016.
Other Current Liabilities:
Accrued warranty	$	4,542		$	3,838
Customer deposits		67			581
Retrofit liability		353			432
Accrued professional services		784			424
Accrued royalties		60			1,233
Other		1,898			1,539
Total other current liabilities	$	7,704		$	8,047

Components of accumulated other comprehensive income (loss)

Components of Accumulated Other Comprehensive Income (Loss)

	Foreign Currency Translations			Defined Benefit Pension Plans			Unrealized Income (Loss) on Investment			Accumulated Other Comprehensive Income
Balance as of December 31, 2016	$	(5,817	)	$	(227	)	$	(2	)	$	(6,046	)
Current period change		3,470			—			(2	)		3,468
Balance as of September 30, 2017	$	(2,347	)	$	(227	)	$	(4	)	$	(2,578	)

XML

Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of goodwill

The following table summarizes the activity in the Company’s goodwill during the nine months ended September 30, 2017:

	(in thousands)
Balance as of December 31, 2016	$	8,940
Foreign currency movements		1,159
Balance as of September 30, 2017	$	10,099

Summary of finite-lived intangible assets

Finite-lived intangible assets are recorded at cost, less accumulated amortization. Finite-lived intangible assets as of September 30, 2017 and December 31, 2016 consisted of the following (in thousands):

	September 30, 2017
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	18,758	$	(16,517	)	$	2,241
Customer relationships		9,426		(9,426	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,235	)		17
Trademark		80		(80	)		—
Total	$	32,443	$	(30,185	)	$	2,258

	December 31, 2016
	Adjusted cost		Accumulated amortization			Net carrying amount
Developed technology	$	15,726	$	(15,380	)	$	346
Customer relationships		9,322		(9,322	)		—
Brand names		1,927		(1,927	)		—
Patented technology		2,252		(2,186	)		66
Trademark		80		(80	)		—
Total	$	29,307	$	(28,895	)	$	412

Estimated future amortization expense

The estimated future amortization expense of finite intangible assets as of September 30, 2017 is as follows (in thousands):

Fiscal Years	Amounts
2017 (remaining three months)		52
2018		283
2019		352
2020		286
Thereafter		1,285
Total future amortization expense	$	2,258

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Warranties (Tables)

9 Months Ended

Sep. 30, 2017

Product Warranties Disclosures [Abstract]

Components of the warranty accrual

Components of the warranty accrual, which were included in the accompanying condensed consolidated balance sheets with other current liabilities, were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30, 2017			September 24, 2016			September 30, 2017			September 24, 2016
Balance as of beginning of period	$	4,602		$	4,556		$	3,838		$	4,504
Accruals for warranties issued during period		1,020			1,100			3,800			3,529
Settlements during the period		(1,080	)		(1,471	)		(3,096	)		(3,848	)
Balance as of end of period	$	4,542		$	4,185		$	4,542		$	4,185

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Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Reconciliation of the basic and diluted net income per share computations

A reconciliation of the share denominator of the basic and diluted net income per share computations for three and nine months ended September 30, 2017 and September 24, 2016 is as follows (in thousands):

	Three Month Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Weighted average common shares outstanding used in    basic net income (loss) per share calculation		25,494		24,826		25,320		24,550
Potential dilutive common stock equivalents,    using treasury stock method		438		456		613		429
Weighted average shares used in diluted net income    (loss) per share calculation		25,932		25,282		25,933		24,979

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Stockholders' Equity and Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Employee stock purchase plan assumptions

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017			September 24, 2016
Employee Stock Purchase Plan:
Expected life	0.5 years		0.5 years		0.5 years			0.5 years
Volatility		38.9%		38.2%		37.2	%		38.7%
Risk free interest rate		1.13%		0.37%		0.91	%		0.44%
Dividends		—		—		—			—

Stock option plans activity

A summary of activity of stock options during the nine months ended September 30, 2017 is as follows:

	Number of Shares Outstanding (Options)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (inThousands)
Options
Outstanding at December 31, 2016		440,545		$	15.06		2.12	$	4,405
Exercised		(180,629	)	$	13.58
Cancelled		(855	)	$	16.63
Outstanding at September 30, 2017		259,061		$	16.09		1.81	$	3,293
Exercisable at September 30, 2017		255,665		$	16.06		1.79	$	3,256

Summary of activity for RSUs

A summary of activity for RSUs is as follows:

Summary of activity for RSUs	Number of RSUs			Weighted Average Fair Value
Outstanding RSUs as of December 31, 2016		819,785		$	16.79
Granted		340,070		$	27.29
Released		(356,619	)	$	16.79
Cancelled		(44,046	)	$	17.21
Outstanding RSUs as of September 30, 2017		759,190		$	21.48

Summary of activity for PSUs

A summary of activity for PSUs is as follows:

Summary of activity for PSUs	Number of PSUs			Weighted Average Fair Value
Outstanding PSUs as of December 31, 2016		107,500		$	9.94
Granted		59,550			26.75
Released		(38,500	)		10.41
Cancelled		(4,000	)		12.64
Outstanding PSUs as of September 30, 2017		124,550		$	17.86

PSUs valuation assumptions

The assumptions for the valuation of PSUs are summarized as follows:

	2017 Award		2016 Award
Grant Date Fair Value Per Share		26.75	$	8.52
Weighted-average assumptions/inputs:
Expected Dividend		—		—
Range of risk-free interest rates		1.40%		0.92%
Range of expected volatilities for peer group	23%-62%		22%-93%

Stock-based compensation expense for all share-based payment awards

Stock-based compensation expense for all share-based payment awards made to the Company’s employees and directors pursuant to the employee stock option and employee stock purchase plans by function were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Cost of products	$	216	$	116	$	628	$	273
Cost of service		161		138		463		355
Research and development		509		387		1,262		985
Selling		639		537		1,707		1,492
General and administrative		922		822		2,715		2,327
Total stock-based compensation expense related to employee stock options and employee stock purchases	$	2,447	$	2,000	$	6,775	$	5,432

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Provision for income taxes

The provision for income taxes consists of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Provision for income taxes	$	1,756	$	1,332	$	4,492	$	2,568

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Segment, Geographic, Product and Significant Customer Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Total net revenue

The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands)

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Total net revenues (1):
South Korea	$	22,269	$	15,710	$	72,388	$	35,226
Japan		4,781		11,765		17,400		24,669
United States		6,231		8,211		28,101		24,306
China		3,403		7,364		17,420		33,883
Taiwan		2,304		6,334		19,016		16,962
Singapore		9,774		5,078		12,229		18,645
Other		7,913		4,252		13,862		8,279
Total net revenues	$	56,675	$	58,714	$	180,416	$	161,970

Long-lived tangible assets

	September 30, 2017		December 31, 2016
Long-lived tangible assets:
United States	$	41,002	$	42,688
International		1,315		1,538
Total long-lived tangible assets	$	42,317	$	44,226

Customers accounted for 10% or more of total accounts receivable

The following customers accounted for 10% or more of total accounts receivable, net:

	At
	September 30, 2017		December 31, 2016
Samsung Electronics Co. Ltd.		23%		14%
Micron Technology, Inc.		27%		12%
Taiwan Semiconductor Manufacturing Company Limited	***			20%
Intel Corporation		11%		11%
Toshiba Corporation	***			10%

*** The customer accounted for less than 10% of total accounts receivable, net, as of that period end.

Customers accounted for 10% or more of total revenue

The following customers accounted for 10% or more of total net revenues:

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
Samsung Electronics Co. Ltd.		32%	***			28%	***
SK Hynix	***			19%		15%		14%
Intel Corporation		14%		19%		12%		19%
Micron Technology, Inc.		19%		15%		11%		25%

*** The customer accounted for less than 10% of total net revenues during the period.

XML

Nature of Business and Basis of Presentation - Textual (Details)	9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration	91 days	91 days
Maximum period of delivery to customers	6 months
Maximum period services are provided over the fixed arrangement term	12 months
Minimum [Member]
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration	364 days
Maximum [Member]
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration	371 days

XML

Recent Accounting Pronouncements - Textual (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 02, 2017	Apr. 01, 2017
Stock-based Compensation [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Increase (decrease) in accumulated deficit	$ 0.1	$ (1.2)

XML

Fair Value Measurements and Disclosures - Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Total marketable securities	$ 96,316	$ 82,899
Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	5,806	3,458
Total marketable securities	96,316	82,899
Total	102,122	86,357
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	812	959
Total marketable securities	0	0
Total	812	959
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	4,994	2,499
Total marketable securities	96,316	82,899
Total	101,310	85,398
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	0	0
Total marketable securities	0	0
Total	0	0
Money market funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	812	959
Money market funds [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	812	959
Money market funds [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	0	0
Money market funds [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	0	0
Commercial paper and corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	4,994	2,499
Commercial paper and corporate debt securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	0	0
Commercial paper and corporate debt securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	4,994	2,499
Commercial paper and corporate debt securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total cash equivalents	0	0
U.S. Treasury securities and U.S. Government agency debt securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	2,497	17,072
U.S. Treasury securities and U.S. Government agency debt securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
U.S. Treasury securities and U.S. Government agency debt securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	2,497	17,072
U.S. Treasury securities and U.S. Government agency debt securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Certificates of deposits [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	23,298	23,019
Certificates of deposits [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Certificates of deposits [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	23,298	23,019
Certificates of deposits [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Commercial paper [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	17,910	22,402
Commercial paper [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Commercial paper [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	17,910	22,402
Commercial paper [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Municipal securities and corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	45,697	14,943
Municipal securities and corporate debt securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Municipal securities and corporate debt securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	45,697	14,943
Municipal securities and corporate debt securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	6,914	5,463
Asset-backed Securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	0	0
Asset-backed Securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	6,914	5,463
Asset-backed Securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total marketable securities	$ 0	$ 0

XML

Fair Value Measurements and Disclosures - Measured at Fair Value on Recurring Basis (Parenthetical) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total cash equivalents	$ 5,806	$ 3,458
Cash [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total cash equivalents	$ 38,200	$ 43,600

XML

Fair Value Measurements and Disclosures - Textual (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Fair Value Measurements and Disclosures (Textual) [Abstract]
Fair value assets among level 1, level 2 and level 3 transfers, amount	$ 0		$ 0
Forward Foreign Currency Contracts [Member]
Fair Value Measurements and Disclosures (Textual) [Abstract]
Derivative term			30 days
Forward Foreign Currency Contracts [Member] | Other Income (Expense), Net [Member]
Fair Value Measurements and Disclosures (Textual) [Abstract]
Gain (loss) on settlement of derivatives	$ 300,000	$ 100,000	$ 1,000,000	$ (1,200,000)

XML

Fair Value Measurements and Disclosures - Notional Amounts and Fair Values of Outstanding Derivative Instruments (Details) - Forward Foreign Currency Contracts [Member] - Not Designated as Hedging Instrument [Member] - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Purchase [Member]
Derivatives Fair Value [Line Items]
Notional Amount	$ 21,600,000	$ 12,600,000
Fair Value Asset	0	0
Fair Value Liability	100,000	0
Sell [Member]
Derivatives Fair Value [Line Items]
Notional Amount	16,600,000	1,300,000
Fair Value Asset	0	0
Fair Value Liability	$ 100,000	$ 0

XML

Cash and Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 140,365	$ 129,959
Gross Unrealized Gains	3	19
Gross Unrealized Losses	(11)	(17)
Estimated Fair Market Value	140,357	129,961
U.S. Government agency securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,001	11,412
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5)	(7)
Estimated Fair Market Value	1,996	11,405
Commercial paper [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,907	22,402
Gross Unrealized Gains	3	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	17,910	22,402
Corporate debt securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	45,701	14,194
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4)	(6)
Estimated Fair Market Value	45,697	14,188
Asset-backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,916	5,466
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	(3)
Estimated Fair Market Value	6,914	5,463
Cash [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	38,235	43,604
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	38,235	43,604
Money market funds [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	812	959
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	812	959
Certificates of deposits [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	23,298	23,000
Gross Unrealized Gains	0	19
Gross Unrealized Losses	0	0
Estimated Fair Market Value	23,298	23,019
U.S. Treasury securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	501	5,667
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	501	5,667
Commercial paper and corporate debt securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	4,994	2,499
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	$ 4,994	2,499
Municipal securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		756
Gross Unrealized Gains		0
Gross Unrealized Losses		(1)
Estimated Fair Market Value		$ 755

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Cash and Investments - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]
Net realized gains and losses on sale of securities	$ 0.9	$ 0.3
Investment maturity period, less than	2 years		2 years

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Accounts Receivable - Textual (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016	Dec. 31, 2016
Accounts Receivable (Additional Textual) [Abstract]
Sold receivables amount	$ 6,100,000	$ 10,100,000	$ 15,500,000	$ 29,600,000
Due from unrelated third parties	$ 0		$ 0		$ 0
Minimum [Member]
Accounts Receivable (Textual) [Abstract]
Administrative fees as well as interest percent			0.61%
Maximum [Member]
Accounts Receivable (Textual) [Abstract]
Administrative fees as well as interest percent			1.68%

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Financial Statement Components - Selected Financial Statement Components (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jul. 01, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Dec. 26, 2015
Inventories:
Raw materials and sub-assemblies	$ 31,772		$ 23,506
Work in process	18,280		10,347
Finished goods	4,968		4,984
Inventories	55,020		38,837
Inventories-delivered systems	3,320		2,457
Total inventories	58,340		41,294
Property, plant and equipment, net:
Total property, plant and equipment, gross	85,023		86,545
Accumulated depreciation and amortization	(42,706)		(42,319)
Total property, plant and equipment, net	42,317		44,226
Other Current Liabilities:
Accrued warranty	4,542	$ 4,602	3,838	$ 4,185	$ 4,556	$ 4,504
Customer deposits	67		581
Retrofit liability	353		432
Accrued professional services	784		424
Accrued royalties	60		1,233
Other	1,898		1,539
Total other current liabilities	7,704		8,047
Land [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	15,571		15,568
Building and improvements [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	20,649		20,532
Machinery and equipment [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	35,428		35,659
Furniture and fixtures [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	2,289		2,282
Software [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	9,261		9,756
Capital in progress [Member]
Property, plant and equipment, net:
Total property, plant and equipment, gross	$ 1,825		$ 2,748

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Financial Statement Components - Selected Financial Statement Components (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Depreciation and amortization expense	$ 1.6	$ 1.7	$ 5.1	$ 5.1

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Financial Statement Components - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			$ 243,774
Current period change	$ 779	$ 520	3,468	$ 2,091
End of period	274,485		274,485
Foreign Currency Translations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(5,817)
Current period change			3,470
End of period	(2,347)		(2,347)
Defined Benefit Pension Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(227)
End of period	(227)		(227)
Unrealized Income (Loss) on Investment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(2)
Current period change			(2)
End of period	(4)		(4)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(6,046)
End of period	$ (2,578)		$ (2,578)

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Goodwill and Intangible Assets - Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 8,940
Foreign currency movements	1,159
Ending balance	$ 10,099

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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Summary of Finite-lived intangible assets
Adjusted cost	$ 32,443	$ 29,307
Accumulated amortization	(30,185)	(28,895)
Finite lived intangible assets, Net carrying amount	2,258	412
Developed technology [Member]
Summary of Finite-lived intangible assets
Adjusted cost	18,758	15,726
Accumulated amortization	(16,517)	(15,380)
Finite lived intangible assets, Net carrying amount	2,241	346
Customer relationships [Member]
Summary of Finite-lived intangible assets
Adjusted cost	9,426	9,322
Accumulated amortization	(9,426)	(9,322)
Finite lived intangible assets, Net carrying amount	0	0
Brand names [Member]
Summary of Finite-lived intangible assets
Adjusted cost	1,927	1,927
Accumulated amortization	(1,927)	(1,927)
Finite lived intangible assets, Net carrying amount	0
Patented technology [Member]
Summary of Finite-lived intangible assets
Adjusted cost	2,252	2,252
Accumulated amortization	(2,235)	(2,186)
Finite lived intangible assets, Net carrying amount	17	66
Trademark [Member]
Summary of Finite-lived intangible assets
Adjusted cost	80	80
Accumulated amortization	(80)	(80)
Finite lived intangible assets, Net carrying amount	$ 0	$ 0

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Goodwill and Intangible Assets - Textual (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 100,000	$ 400,000	$ 200,000	$ 1,300,000
Impairment charges	$ 0	$ 0	$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles estimated lives			2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles estimated lives			10 years

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Goodwill and Intangible Assets - Future Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Estimated future amortization expense
2017 (remaining three months)	$ 52
2018	283
2019	352
2020	286
Thereafter	1,285
Finite lived intangible assets, Net carrying amount	$ 2,258	$ 412

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Warranties - Textual (Details)	9 Months Ended
	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
Product warranty period	12 months

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Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Components of the warranty accrual [Roll Forward]
Balance as of beginning of period	$ 4,602	$ 4,556	$ 3,838	$ 4,504
Accruals for warranties issued during period	1,020	1,100	3,800	3,529
Settlements during the period	(1,080)	(1,471)	(3,096)	(3,848)
Balance as of end of period	$ 4,542	$ 4,185	$ 4,542	$ 4,185

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Commitments and Contingencies - Textual (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Liabilities recorded for obligations	$ 0	$ 0

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Net Income Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Reconciliation of the basic and diluted net income per share computations
Weighted average common shares outstanding used in basic net income (loss) per share calculation	25,494	24,826	25,320	24,550
Potential dilutive common stock equivalents, using treasury stock method	438	456	613	429
Weighted average shares used in diluted net income (loss) per share calculation	25,932	25,282	25,933	24,979

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Stockholders' Equity and Stock-Based Compensation - Employee Stock Purchase Plan Assumptions (Details) - Employee Stock Purchase Plan [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Assumption of stock option's fair value
Expected life	6 months	6 months	6 months	6 months
Volatility	38.90%	38.20%	37.20%	38.70%
Risk free interest rate	1.13%	0.37%	0.91%	0.44%
Dividends	0.00%	0.00%	0.00%	0.00%

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Stockholders' Equity and Stock-Based Compensation - Textual (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016	Sep. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted			0	0
Closing stock price					$ 28.80
Intrinsic value of options exercised	$ 1.0	$ 0.5	$ 2.4	$ 1.9
Performance-Based Restricted Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of granted shares that will vest if target stock price performance is achieved			66.70%
Maximum percent of granted shares that will vest if maximum stock price performance is achieved			100.00%
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting			1 year
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting			2 years
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting			3 years

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Stockholders' Equity and Stock-Based Compensation - Summary of Activity of Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Activity of stock option plans [Roll Forward]
Number of Shares Outstanding (Options), Beginning Balance (in shares)	440,545
Number of Shares Outstanding (Options), Exercised (in shares)	(180,629)
Number of Shares Outstanding (Options), Cancelled (in shares)	(855)
Number of Shares Outstanding (Options), Ending Balance (in shares)	259,061	440,545
Number of Shares Outstanding (Options), Exercisable (in shares)	255,665
Weighted average exercise price for stock option plans [Roll Forward]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 15.06
Weighted Average Exercise Price, Exercised (in dollars per share)	13.58
Weighted Average Exercise Price, Cancelled (in dollars per share)	16.63
Weighted Average Exercise Price, Ending Balance (in dollars per share)	16.09	$ 15.06
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 16.06
Weighted Average Remaining Contractual Term, Outstanding	1 year 9 months 22 days	2 years 1 month 13 days
Weighted Average Remaining Contractual Term, Exercisable	1 year 9 months 14 days
Aggregate Intrinsic Value, Outstanding	$ 3,293	$ 4,405
Aggregate Intrinsic Value, Exercisable	$ 3,256

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Stockholders' Equity and Stock-Based Compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Activity for RSUs [Roll Forward]
Number of units Beginning balance (in shares) | shares	819,785
Number of units, Granted (in shares) | shares	340,070
Number of units, Released (in shares) | shares	(356,619)
Number of units, Cancelled (in shares) | shares	(44,046)
Number of units, Ending balance (in shares) | shares	759,190
Weighted Average Fair Value for RSUs [Roll Forward]
Weighted Average Fair Value, Beginning balance (in dollars per share) | $ / shares	$ 16.79
Weighted Average Fair Value, Granted (in dollars per share) | $ / shares	27.29
Weighted Average Fair Value, Released (in dollars per share) | $ / shares	16.79
Weighted Average Fair Value, Cancelled (in dollars per share) | $ / shares	17.21
Weighted Average Fair Value, Ending balance (in dollars per share) | $ / shares	$ 21.48

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Stockholders' Equity and Stock-Based Compensation - Performance Stock Units Activity (Details) - Performance-Based Restricted Stock Units (PSUs) [Member] - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016
Activity for PSUs [Roll Forward]
Number of units Beginning balance (in shares)	107,500
Number of units, Granted (in shares)	59,550
Number of units, Released (in shares)	(38,500)
Number of units, Cancelled (in shares)	(4,000)
Number of units, Ending balance (in shares)	124,550
Weighted Average Fair Value for PSUs [Roll Forward]
Weighted Average Fair Value, Beginning balance (in dollars per share)	$ 9.94
Weighted Average Fair Value, Granted (in dollars per share)	26.75	$ 8.52
Weighted Average Fair Value, Released (in dollars per share)	10.41
Weighted Average Fair Value, Cancelled (in dollars per share)	12.64
Weighted Average Fair Value, Ending balance (in dollars per share)	$ 17.86

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Stockholders' Equity and Stock-Based Compensation - Performance Stock Units Valuation Assumptions (Details) - Performance-Based Restricted Stock Units (PSUs) [Member] - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value Per Share (in dollars per share)	$ 26.75	$ 8.52
Expected Dividend	0.00%	0.00%
Risk free interest rate	1.40%	0.92%
Range of expected volatilities for peer group, minimum	23.00%	22.00%
Range of expected volatilities for peer group, maximum	62.00%	93.00%

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Stockholders' Equity and Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	$ 2,447	$ 2,000	$ 6,775	$ 5,432
Cost of products [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	216	116	628	273
Cost of service [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	161	138	463	355
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	509	387	1,262	985
Selling [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	639	537	1,707	1,492
General and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense related to employee stock options and employee stock purchases	$ 922	$ 822	$ 2,715	$ 2,327

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Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 1,756	$ 1,332	$ 4,492	$ 2,568

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Income Taxes - Textual (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 1,756	$ 1,332	$ 4,492	$ 2,568
Anticipated increase in unrecognized tax benefits during next twelve months	$ 400		$ 400

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Segment, Geographic, Product and Significant Customer Information - Textual (Details)	9 Months Ended
	Sep. 30, 2017 segment
Segment Reporting [Abstract]
Number of operating segments	1

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Segment, Geographic, Product and Significant Customer Information - Revenue Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Net revenues:
Total net revenues	$ 56,675	$ 58,714	$ 180,416	$ 161,970
South Korea [Member]
Net revenues:
Total net revenues	22,269	15,710	72,388	35,226
Japan [Member]
Net revenues:
Total net revenues	4,781	11,765	17,400	24,669
United States [Member]
Net revenues:
Total net revenues	6,231	8,211	28,101	24,306
China [Member]
Net revenues:
Total net revenues	3,403	7,364	17,420	33,883
Taiwan [Member]
Net revenues:
Total net revenues	2,304	6,334	19,016	16,962
Singapore [Member]
Net revenues:
Total net revenues	9,774	5,078	12,229	18,645
Other [Member]
Net revenues:
Total net revenues	$ 7,913	$ 4,252	$ 13,862	$ 8,279

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Segment, Geographic, Product and Significant Customer Information - Long-lived Tangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Long-lived tangible assets:
Total long-lived tangible assets	$ 42,317	$ 44,226
United States [Member]
Long-lived tangible assets:
Total long-lived tangible assets	41,002	42,688
International [Member]
Long-lived tangible assets:
Total long-lived tangible assets	$ 1,315	$ 1,538

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Segment, Geographic, Product and Significant Customer Information - Customers More Than 10% of Accounts Receivable (Details) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Samsung Electronics Co. Ltd. [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	23.00%	14.00%
Micron Technology, Inc. [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	27.00%	12.00%
Taiwan Semiconductor Manufacturing Company Limited [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable		20.00%
Intel Corporation [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	11.00%	11.00%
Toshiba Corporation [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable		10.00%

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Segment, Geographic, Product and Significant Customer Information - Customers More Than 10% of Revenues (Details) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Samsung Electronics Co. Ltd. [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	32.00%		28.00%
SK Hynix [Member]
Net revenues:
Customers accounted for 10% or more of total revenue		19.00%	15.00%	14.00%
Intel Corporation [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	14.00%	19.00%	12.00%	19.00%
Micron Technology, Inc. [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	19.00%	15.00%	11.00%	25.00%