10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

___________________________

FORM 10-Q

__________________________

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

For the Quarterly Period Ended March 31, 2016

OR

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

For the transition period from          to          

Commission File No. 001-36226

___________________________

RUDOLPH TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

___________________________

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

16 Jonspin Road, Wilmington, Massachusetts 01887

(Address of principal executive offices, including zip code)

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

___________________________

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 [X]   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 (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes [X]   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 definition of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Securities Exchange Act.    

Large accelerated filer [  ]	Accelerated filer [ X ]	Non-accelerated filer [  ]	Smaller reporting company [  ]
		(Do not check if a smaller reporting company)

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

The number of outstanding shares of the Registrant’s Common Stock on April 18, 2016 was 30,882,205.

TABLE OF CONTENTS

Item No.  Page

PART I    FINANCIAL INFORMATION

Item 1.	Financial Statements (unaudited)	1
	Condensed Consolidated Balance Sheets at March 31, 2016 and December 31, 2015	1
	Condensed Consolidated Statements of Operations for the three months ended March 31, 2016 and 2015	2
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2016 and 2015	3
	Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2016 and 2015	4
	Notes to Condensed Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	21
Item 4.	Controls and Procedures	21

PART II    OTHER INFORMATION

Item 1.	Legal Proceedings	22
Item 1A.	Risk Factors	22
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	23
Item 3.	Defaults Upon Senior Securities	23
Item 4.	Mine Safety Disclosures	23
Item 5.	Other Information	23
Item 6.	Exhibits	24

PART I FINANCIAL INFORMATION

Item 1. Financial Statements

RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

	March 31, 2016			December 31, 2015
	(Unaudited)
ASSETS
Current Assets:
Cash and cash equivalents	$	38,186		$	44,554
Marketable securities	110,055			116,924
Accounts receivable, less allowance of $703 and $713	64,747			55,492
Inventories, net	74,143			71,490
Prepaid expenses and other current assets	21,519			8,137
Total current assets	308,650			296,597
Property, plant and equipment, net	13,950			12,346
Goodwill	22,495			22,495
Identifiable intangible assets, net	11,998			12,593
Other assets	35,616			35,532
Total assets	$	392,709		$	379,563
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable and accrued liabilities	$	20,029		$	21,466
Income tax payable	5,697			1,163
Deferred revenue	6,713			6,441
Convertible senior notes	58,863			57,846
Other current liabilities	10,627			12,415
Total current liabilities	101,929			99,331
Other non-current liabilities	10,269			9,554
Total liabilities	112,198			108,885
Commitments and contingencies
Stockholders’ equity:
Common stock	31			31
Additional paid-in capital	390,190			394,928
Accumulated other comprehensive loss	(1,991		)	(2,623		)
Accumulated deficit	(107,719		)	(121,658		)
Total stockholders’ equity	280,511			270,678
Total liabilities and stockholders’ equity	$	392,709		$	379,563

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

1

RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended
	March 31,
	2016			2015
Revenues	$	54,362		$	52,570
Cost of revenues	25,317			23,604
Gross profit	29,045			28,966
Operating expenses (income):
Research and development	12,446			10,360
Selling, general and administrative	9,499			12,974
Amortization	595			515
Patent litigation judgment	(14,632		)	—
Total operating expenses	7,908			23,849
Operating income	21,137			5,117
Interest expense, net	1,469			1,382
Other expense	107			638
Income before income taxes	19,561			3,097
Provision for income taxes	5,622			1,249
Net income	$	13,939		$	1,848
Earnings per share:
Basic	$	0.45		$	0.06
Diluted	$	0.44		$	0.06
Weighted average shares outstanding:
Basic	30,957			31,928
Diluted	31,654			32,549

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

2

RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended
	March 31,
	2016			2015
Net income	$	13,939		$	1,848
Other comprehensive income:
Change in net unrealized losses on investments, net of tax	(6		)	(1		)
Change in currency translation adjustments	638			447
Total comprehensive income	$	14,571		$	2,294

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

3

RUDOLPH TECHNOLOGIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended March 31,
	2016			2015
Cash flows from operating activities:
Net income	$	13,939		$	1,848
Adjustments to reconcile net income to net cash and cash equivalents (used in) provided by operating activities:
Amortization of convertible note discount and issuance costs	1,017			914
Amortization of intangibles	595			515
Depreciation	944			898
Foreign currency exchange loss	107			638
Change in fair value of contingent consideration	117			(396		)
Share-based compensation	1,161			4,410
Provision for doubtful accounts and inventory valuation	800			923
Litigation settlement	(14,632		)	—
Changes in operating assets and liabilities	(10,371		)	1,281
Net cash and cash equivalents (used in) provided by operating activities	(6,323		)	11,031
Cash flows from investing activities:
Purchases of marketable securities	(44,311		)	(60,458		)
Proceeds from sales of marketable securities	51,120			51,381
Purchases of property, plant and equipment	(1,514		)	(1,072		)
Net cash and cash equivalents provided by (used in) investing activities	5,295			(10,149		)
Cash flows from financing activities:
Purchases of common stock	(4,700		)	(6,786		)
Tax payments related to shares withheld for share-based compensation plans	(1,509		)	(1,868		)
Issuance of shares through share-based compensation plans	6			61
Tax benefit for sale of shares through share-based compensation plans	304			93
Net cash and cash equivalents used in financing activities	(5,899		)	(8,500		)
Effect of exchange rate changes on cash and cash equivalents	559			(131		)
Net decrease in cash and cash equivalents	(6,368		)	(7,749		)
Cash and cash equivalents at beginning of period	44,554			43,114
Cash and cash equivalents at end of period	$	38,186		$	35,365
Supplemental disclosure of cash flow information:
Income taxes paid	$	1,068		$	356
Interest paid	$	1,125		$	1,125

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

4

RUDOLPH TECHNOLOGIES, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except per share data)

(Unaudited)

NOTE 1.    Basis of Presentation

The accompanying interim unaudited condensed consolidated financial statements have been prepared by Rudolph Technologies, Inc. (the “Company” or “Rudolph”) and in the opinion of management reflect all adjustments, consisting of normal recurring accruals, necessary for their fair presentation in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  Preparing financial statements requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes.  Actual amounts could differ materially from reported amounts.  The interim results for the three month period ended March 31, 2016 are not necessarily indicative of results to be expected for the entire year or any future periods.  This interim financial information should be read in conjunction with the financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 (“2015 10-K”) filed with the Securities and Exchange Commission (“SEC”). The accompanying condensed consolidated balance sheet at December 31, 2015 has been derived from the audited consolidated financial statements included in the 2015 10-K.

Reclassifications

Certain immaterial prior period amounts have been reclassified to conform to the current financial statement presentation.

Debt Issuance Costs:

In the first quarter of 2016, the Company adopted Accounting Standards Update (ASU) No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30), Simplifying the Presentation of Debt Issuance Costs,” which requires entities to present debt issuance costs related to a debt liability as a direct deduction from the carrying amount of that debt liability on the balance sheet as opposed to being presented as a deferred charge. For all periods presented in this Form 10-Q for the quarter ended March 31, 2016, unamortized debt issuance costs related to the Company’s convertible senior notes are reported on the Consolidated Balance Sheets as a reduction of the carrying value of the related debt. Prior to adoption, the Company reported the unamortized debt issuance costs in “Other Assets” on the Consolidated Balance Sheets. As of December 31, 2015, the change in presentation resulted in a reduction of “Other Assets” of $261 and a corresponding decrease in “Convertible Senior Notes” with no impact on the Company’s Consolidated Statements of Operations.

Recent Accounting Pronouncements

In March 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting”. The standard was issued as part of the Simplification Initiative which involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The standard is effective for annual periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. The Company is in the process of determining the adoption methods as well as the effects the adoption of ASU No. 2016-09 will have on its consolidated financial position, results of operations, and cash flows.

In March 2016, the FASB issued ASU No. 2016-07, Investments-Equity Method and Joint Ventures (Topic 323). The standard was issued as part of the Simplification Initiative which eliminates the requirement that when an investment qualifies for use of the equity method as of a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method has been in effect during all previous periods that the investment had been held. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-07 will have on its consolidated financial position, results of operations, and cash flows.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The standard requires that lessees will be required to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. ASU No. 2016-02 also will require disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative information. The standard will take effect for fiscal years and interim periods within those fiscal years beginning after December 15, 2018 with

5

earlier adoption permitted. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-02 will have on its consolidated financial position, results of operations, and cash flows.

In January 2016, the FASB issued ASU 2016-01, “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” The pronouncement requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income, requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset, and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. These changes become effective for the Company’s fiscal year beginning January 1, 2018. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-01 will have on its consolidated financial position, results of operations, and cash flows.

In July 2015, the FASB issued ASU No. 2015-11, “Inventory (Topic 330), Simplifying the Measurement of Inventory.” This ASU is intended to simplify subsequent measurement of inventory. An entity should measure inventory within the scope of this ASU at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable cost of completion, disposal, and transportation. The standard is effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. The adoption of ASU 2015-11 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows.

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU No. 2014-09 outlines a comprehensive revenue recognition model and supersedes most current revenue recognition guidance. In July 2015, the FASB deferred for one year the effective date of the new revenue standard, but early adoption will be permitted. The new standard will be effective for the Company on January 1, 2018. ASU No. 2014-09 allows for two methods of adoption: (a) “full retrospective” adoption, meaning the standard is applied to all periods presented, or (b) “modified retrospective” adoption, meaning the cumulative effect of applying ASU No. 2014-09 is recognized as an adjustment to the 2018 opening retained earnings balance. The Company is in the process of determining the adoption method as well as the effects the adoption of ASU No. 2014-09 will have on its consolidated financial position, results of operations, and cash flows.

NOTE 2.  Fair Value Measurements

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

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2016 and December 31, 2015:

6

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2016
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	109,217	$	—	$	109,217	$	—
Corporate bonds	838		—		838		—
Total Assets	$	110,055	$	—	$	110,055	$	—
Liabilities:
Foreign currency forward contracts	289		$	—	$	289	$	—
Contingent consideration - acquisitions	3,820		—		—		3,820
Total Liabilities	$	4,109	$	—	$	289	$	3,820
December 31, 2015
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	116,089	$	—	$	116,089	$	—
Corporate bonds	835		—		835		—
Total Assets	$	116,924	$	—	$	116,924	$	—
Liabilities:
Foreign currency forward contracts	$	85	$	—	$	85	$	—
Contingent consideration - acquisitions	3,703		—		—		3,703
Total Liabilities	$	3,788	$	—	$	85	$	3,703

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

Level 3 liabilities consisted of contingent consideration related to an acquisition for which the Company uses a discounted cash flow model to value these liabilities. The Level 3 assumptions used in the discounted cash flow model for the contingent consideration included projected revenues, estimates of discount rates of 9.1% and timing of cash flows. A significant decrease in the projected revenues or increase in discount rates could result in a significantly lower fair value measurement for the contingent consideration.

This table presents a reconciliation for all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months endedMarch 31, 2016:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2015	$	3,703
Additions	—
Total loss included in selling, general and administrative expense	117
Payments	—
Transfers into (out of) Level 3	—
Balance at March 31, 2016	$	3,820

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

Fair Value of Other Financial Instruments

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

The Company’s convertible senior notes are not publicly traded. The estimated fair value of the Company’s convertible senior notes was valued using a discounted cash flow model. The Level 3 assumptions, based on data available at the valuation date used in preparing the discounted cash flow model, included estimates of interest rates, timing and amount of cash flows and expected holding periods of the convertible senior notes. The fair value of the contingent interest associated with the convertible senior notes is valued quarterly using the present value under an expected cash flow model incorporating the probabilities of the contingent events occurring.

The following table reflects information pertaining to the Company’s convertible senior notes:

	March 31, 2016			December 31, 2015
Net carrying value of convertible senior notes	$	58,863		$	57,846
Estimated fair value of convertible senior notes	$	60,240		$	60,630
Estimated interest rate used in discounted cash flow model	5.0		%	5.0		%
Fair value of contingent interest	$	—		$	—

NOTE 3.   Marketable Securities

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

The Company has determined that the gross unrealized losses on its marketable securities at March 31, 2016 and December 31, 2015 are temporary in nature. The Company reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. Factors considered in determining whether a loss is other-than-temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value.

At March 31, 2016 and December 31, 2015, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2016
Municipal notes and bonds	$	109,223	$	14	$	20	$	109,217
Corporate bonds	$	838	$	—	$	—	$	838
Total marketable securities	$	110,061	$	14	$	20	$	110,055
December 31, 2015
Municipal notes and bonds	$	116,086	$	18	$	15	$	116,089
Corporate bonds	$	838	$	—	$	3	$	835
Total marketable securities	$	116,924	$	18	$	18	$	116,924

 The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheet classification, is as follows at March 31, 2016 and December 31, 2015:

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	March 31, 2016				December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	99,920	$	99,914	$	113,542	$	113,549
Due after one through five years	10,141		10,141		3,382		3,375
Due after five through ten years	—		—		—		—
Due after ten years	—		—		—		—
Total marketable securities	$	110,061	$	110,055	$	116,924	$	116,924

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position at March 31, 2016 and December 31, 2015:  

	Unrealized Loss Position For Less Than 12 Months				Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2016
Municipal notes and bonds	$	57,835	$	20	$	—	$	—
Total	$	57,835	$	20	$	—	$	—
December 31, 2015
Municipal notes and bonds	$	52,638	$	15	$	305	$	1
Corporate bonds	835		3		—		—
Total	$	53,473	$	18	$	305	$	1

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

NOTE 4.    Derivative Instruments and Hedging Activities

The Company, when it considers it to be appropriate, enters into forward contracts to hedge the economic exposures arising from foreign currency denominated transactions. At March 31, 2016 and December 31, 2015, these contracts included the future sale of Japanese Yen to purchase U.S. dollars. Derivative instruments are recognized as either prepaid expenses and other current assets or other current liabilities in the Condensed Consolidated Balance Sheets and are measured at fair value. The foreign currency forward contracts were entered into by the Company’s Japanese subsidiary to economically hedge a portion of certain intercompany obligations. The forward contracts are not designated as hedges for accounting purposes and decreases in the fair value of $204 and $78 for the three month periods ended March 31, 2016 and 2015, respectively, are recorded within the caption “Other expense” in the Condensed Consolidated Statements of Operations.

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2016 and December 31, 2015 were as follows:

	March 31, 2016		December 31, 2015
Notional amount	$	4,525	$	5,423
Fair value of liability	$	289	$	85

NOTE 5.    Purchased Intangible Assets

Purchased intangible assets as of March 31, 2016 and December 31, 2015 are as follows:

9

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2016
Finite-lived intangibles:
Developed technology	$	65,527	$	55,592	$	9,935
Customer and distributor relationships	9,560		8,258		1,302
Trade names	4,361		3,600		761
Total identifiable intangible assets	$	79,448	$	67,450	$	11,998
December 31, 2015
Finite-lived intangibles:
Developed technology	$	65,527	$	55,110	$	10,417
Customer and distributor relationships	9,560		8,170		1,390
Trade names	4,361		3,575		786
Total identifiable intangible assets	$	79,448	$	66,855	$	12,593

Intangible asset amortization expense for the three months endedMarch 31, 2016 and 2015 was $595 and $515, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expense for the remainder of 2016 will be $1,726, and for each of the next five years estimated amortization expense amounts to $1,933 for 2017, $1,496 for 2018, $1,496 for 2019, $1,294 for 2020, and $546 for 2021.

NOTE 6.    Balance Sheet Details

Inventories

Inventories are comprised of the following:

	March 31, 2016		December 31, 2015
Materials	$	39,345	$	39,022
Work-in-process	23,161		18,918
Finished goods	11,637		13,550
Total inventories	$	74,143	$	71,490

The Company has established reserves of $9,515 and $8,896 as of March 31, 2016 and December 31, 2015, respectively, for slow moving and obsolete inventory, which are included in the amounts above.

Prepaid expenses and other current assets

Prepaid expenses and other current assets are comprised of the following:

	March 31, 2016		December 31, 2015
Patent litigation judgment	$	14,632	$	—
Other	6,887		8,137
Total prepaid expenses and other current assets	$	21,519	$	8,137

Property, Plant and Equipment

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

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	March 31, 2016		December 31, 2015
Land and building	$	2,584	$	5,024
Machinery and equipment	23,952		21,683
Furniture and fixtures	2,671		3,414
Computer equipment	5,595		5,304
Leasehold improvements	8,089		7,884
	42,891		43,309
Less: Accumulated depreciation	28,941		30,963
Total property, plant and equipment, net	$	13,950	$	12,346

In February 2016, the Company consolidated its New Jersey locations into its Budd Lake, NJ facility and vacated its corporate offices in Flanders, NJ. The Flanders, NJ corporate office location is classified as an asset held for sale. The Company believes the facility will be sold within the next 12 months and has classified the facility as current assets held for sale in “Prepaid and other assets”. Assets held for sale as of March 31, 2016 consist of land with a cost of $168 and buildings with a cost and net book value of $939 and $51, respectively.

Other assets

Other assets is comprised of the following:

	March 31, 2016		December 31, 2015
Deferred income taxes	$	35,047	$	34,973
Other	569		559
Total other assets	$	35,616	$	35,532

Other current liabilities

Other current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Litigation accrual	$	3,252	$	3,252
Contingent consideration - acquisitions	717		1,407
Other	6,658		7,756
Total other current liabilities	$	10,627	$	12,415

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Unrecognized tax benefits (including interest)	$	2,963	$	3,152
Contingent consideration - acquisitions	3,103		2,296
Deferred revenue	1,128		1,206
Other	3,075		2,900
Total other non-current liabilities	$	10,269	$	9,554

NOTE 7.   Debt Obligations

On July 25, 2011, the Company issued $60,000 aggregate principal amount of 3.75% Convertible Senior Notes due 2016 (the “Notes”) at par. The Notes were issued pursuant to an indenture, dated as of July 25, 2011, between the Company and Bank

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of New York Mellon Trust Company, N.A., as Trustee, which includes a form of Note. The Notes provide for the payment of interest semi-annually in arrears on January 15 and July 15 of each year, beginning January 15, 2012, at an annual rate of 3.75% and will mature on July 15, 2016, unless earlier converted or repurchased. The Notes may be converted, under certain circumstances, based on an initial conversion rate of 77.241 shares of Company common stock per $1 principal amount of Notes, which represents an initial conversion price of approximately $12.95 per share. Concurrently with the issuance of the Notes, the Company purchased a convertible note hedge and sold a warrant. Each of the convertible note hedge and warrant transactions were entered into with an affiliate of the initial purchaser of the Notes. The convertible note hedge is intended to reduce the potential future dilution to the Company’s common stock associated with the conversion of the Notes. However, the warrant transaction will have a dilutive effect on the Company’s earnings per share to the extent that the price of the Company’s common stock exceeds the strike price of the warrant. The strike price of the warrant is $17.00 per share subject to adjustment in accordance with the terms of the agreement. The net proceeds to the Company from the sale of the Notes, including the convertible note hedge and warrant, were $50,249.

The following table reflects the net carrying value of the Notes:

	March 31, 2016		December 31, 2015
Convertible senior notes	$	60,000	$	60,000
Less: Unamortized interest discount	999		1,893
Less: Unamortized debt issuance costs	138		261
Net carrying value of convertible senior notes	$	58,863	$	57,846

The following table presents the amount of interest cost recognized relating to the Notes during the three months endedMarch 31, 2016 and March 31, 2015:

	Three Months Ended March 31,
	2016		2015
Contractual interest coupon	$	562	$	562
Amortization of interest discount	894		811
Amortization of debt issuance costs	123		103
Total interest cost recognized	$	1,579	$	1,476

The remaining bond discount of $999 and debt issuance costs of $138 relating to the Notes, as of March 31, 2016, will be amortized over the remaining life of the Notes.

NOTE 8.   Commitments and Contingencies

Warranty Reserves

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

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

	Three Months Ended March 31,
	2016		2015
Balance, beginning of the period	$	1,894	$	1,574
Accruals	544		822
Less: Usage	665		696
Balance, end of the period	$	1,773	$	1,700

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

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Legal Matters

From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business. The Company’s 2015 10-K reflects the status of the Company’s litigation with Integrated Technology Corporation (“ITC”) and Camtek, Ltd. (“Camtek”). The following reflects the material developments during the three months ended March 31, 2016 with regard to these matters.

Integrated Technology Corporation v. Rudolph Technologies, Inc., No. CV-06-2182 (PHX-ROS): This matter is fully resolved with the sole exception of the issue of remanded attorney’s fees which were set by the U.S. District Court for the District of Arizona (the “AZ District Court”) at $3,252. A hearing regarding the Company’s appeal of this order was held on October 6, 2015 and the U.S. Federal Court of Appeals (the “Court of Appeals”). The Court of Appeals issued a ruling that the award was improperly established, vacated the amount of the award and remanded the matter back to the AZ District Court for a determination of a proper fee award. The Company believes that it has meritorious defenses regarding this issue and intends to continue to vigorously prosecute the matter. The $3,252 is held in escrow and is recorded in “Prepaid expenses and other current assets” in the Consolidated Balance Sheet at March 31, 2016. The corresponding liability is recorded under the caption “Other current liabilities” in the Condensed Consolidated Balance Sheet at March 31, 2016. The Company expects this to be the maximum liability reasonably possible for the attorney’s fees, excluding interest, for this lawsuit with respect to both the pre-August 2007 and the post-August 2007 tools which were the subject of this action.

August Technology Corporation and Rudolph Technologies, Inc. v. Camtek, Ltd., No. 05-CV-01396 (JRT/FLN): Subsequent to the ruling by the U.S. District Court for the District of Minnesota (the “MN District Court”) in the Company’s favor that Camtek’s Falcon tools continue to infringe the Company’s patent under the revised claim construction of the patent determined by the Court of Appeals, the MN District Court, on February 9, 2015, issued an Order granting the Company’s Motion for Final Judgment, reinstating the original damages and applying prejudgment interest for a total award of $14,512. In addition, the MN District Court issued a permanent injunction against Camtek from “making, using, selling and offering to sell any of its Falcon machines and any machines that are colorable imitations thereof in the United States, intended for sale and use within the United States, until the expiration of the ‘6,298 patent,” which is projected to be in 2020. While, in March of 2015, Camtek filed an appeal with the Court of Appeals challenging the MN District Court’s ruling, the Court of Appeals denied Camtek’s appeal on February 3, 2016, affirming both the infringement ruling and the damages and interest totaling approximately $14,632 million assessed against Camtek by the MN District Court, the payment of which is guaranteed by a supersedeas bond. All of Camtek’s rights to appeal the final judgment have now expired. On March 14, 2016 the Company filed its request to the MN District Court to release payment under the bond and is currently awaiting a response from the Court. The Company recorded the judgment in “Prepaid expenses and other current assets” in the Consolidate Balance Sheets as of March 31, 2016 as the gain contingency was realized upon completion of the appeal process.

August Technology Corporation and Rudolph Technologies, Inc. v. Camtek, Ltd., No. 10-CV-2202 (MJD/FLN): With regard to the Company’s subsequently filed lawsuit against Camtek in the MN District Court alleging infringement of its U.S. Patent No. 7,729,528, this lawsuit continues to be stayed pending resolution of a re-examination petition filed by Camtek with the U.S. Patent and Trademark Office.

Rudolph Technologies, Inc. v. Camtek, Ltd., No. 15-CV-1246 (ADM/BRT): On March 12, 2015, the Company filed and served on Camtek a complaint asserting infringement of Rudolph ‘6,298 patent by Camtek’s Eagle product with the MN District Court. On April 21, 2015, the Company filed a Motion for Preliminary Injunction to enjoin Camtek’s sale of the Eagle device in the United States which is currently pending. On or about April 20, 2015, Camtek filed a complaint in the U.S. District Court for the District of New Jersey (the “NJ District Court”) seeking a declaratory judgment challenging the jurisdiction and venue of the Minnesota court and seeking to have the NJ District Court find that the ‘6,298 patent is not infringed and, in the alternative, that the ‘6,298 patent is invalid. On August 26, 2015, the MN District Court ruled that Minnesota jurisdiction was appropriate for this matter while at the same time denying the Company’s Motion for Preliminary Injunction. Camtek’s complaint filed in the NJ District Court was subsequently dismissed. This matter is currently in discovery phase of the litigation.

Line of Credit

The Company has a credit agreement with Credit Suisse providing for a $60,000 committed secured revolving line of credit, which will expire on October 31, 2016. The Company has not utilized the credit agreement to date.

NOTE 9.   Share-Based Compensation

Restricted Stock Unit Activity

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A summary of the Company’s nonvested restricted stock unit activity with respect to the three months ended March 31, 2016 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015	1,169	$	11.40
Granted	162	$	12.31
Less: Vested	268	$	10.51
Less: Forfeited	7	$	11.16
Nonvested at March 31, 2016	1,056	$	11.76

As of March 31, 2016 and December 31, 2015, there was $8,930 and $8,221 of total unrecognized compensation cost related to restricted stock units granted under the Company’s stock plans, respectively.  That cost is expected to be recognized over a weighted average period of 3.0 years and 2.6 years for the respective periods.

NOTE 10.   Other Expense

	Three Months Ended
	March 31,
	2016		2015
Foreign currency exchange losses, net	$	107	$	638
Total other expense	$	107	$	638

NOTE 11.   Income Taxes

The following table provides details of income taxes:

	Three Months Ended
	March 31,
	2016			2015
Income before income taxes	$	19,561		$	3,097
Provision for income taxes	$	5,622		$	1,249
Effective tax rate	28.7		%	40.3		%

The income tax provision for the three months endedMarch 31, 2016 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year. The changes in the Company’s effective tax rate for the three months endedMarch 31, 2016 compared to the same period for the prior year are primarily due to the mix of forecasted earnings by jurisdictions, additional foreign tax credits generated and the availability of the research and development credit in 2016.

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt. Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing the need for a valuation allowance. As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets. The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if appropriate. The Company has a recorded valuation allowance against certain of its deferred tax assets of $2,205 as of March 31, 2016 and December 31, 2015.

NOTE 12.   Earnings Per Share

Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period.  Diluted earnings per share is computed in the same manner and also gives effect to all dilutive common equivalent

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shares outstanding during the period.  Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive. In accordance with U.S. GAAP, these shares were not included in calculating diluted earnings per share. For the three months endedMarch 31, 2016, the weighted average number of stock options and restricted stock units excluded from the computation of diluted earnings per share were 151 and 0, respectively. For the three months endedMarch 31, 2015, all outstanding stock options and restricted stock units totaling 299 and 0, respectively, were excluded from the computation of diluted loss per share because the effect in the periods would be anti-dilutive. Diluted earnings per share-weighted average shares outstanding do not include any effect resulting from assumed conversion of the Notes and warrants as their impact would be anti-dilutive.

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

	Three Months Ended March 31,
	2016		2015
Numerator:
Net income	$	13,939	$	1,848
Denominator:
Basic earnings per share - weighted average shares outstanding	30,957		31,928
Effect of potential dilutive securities:
Employee stock options and restricted stock units - dilutive shares	697		621
Diluted earnings per share - weighted average shares outstanding	31,654		32,549
Earnings per share:
Basic	$	0.45	$	0.06
Diluted	$	0.44	$	0.06

NOTE 13.   Accumulated Other Comprehensive Loss

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

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

	Foreign currency translation adjustments			Net unrealized losses on available-for-sale investments		Accumulated other comprehensive loss (income)
Beginning Balance, December 31, 2015	$	2,623		$	—	$	2,623
Net current period other comprehensive loss (income)	(638		)	6		(632		)
Reclassifications	—			—		—
Ending balance, March 31, 2016	$	1,985		$	6	$	1,991

NOTE 14.   Segment Reporting and Geographic Information

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

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The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2016				2015
Systems and Software:
Process Control	$	36,459	67	%	$	36,061	69	%
Lithography	170		—	%	21		—	%
Software	7,422		14	%	7,794		15	%
Parts	7,160		13	%	5,655		10	%
Services	3,151		6	%	3,039		6	%
Total revenue	$	54,362	100	%	$	52,570	100	%

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

	Three Months Ended
	March 31,
	2016		2015
United States	$	7,388	$	17,648
Taiwan	22,035		13,329
Japan	2,937		1,314
China	8,825		6,088
South Korea	1,623		3,531
Singapore	7,047		1,738
Other Asia	871		39
Germany	697		7,055
Other Europe	2,939		1,828
Total revenue	$	54,362	$	52,570

The following customers each accounted for more than 10% of total revenues for the indicated periods.

	Three Months Ended
	March 31,
	2016		2015
Customer A	26.9	%	11.1	%
Customer B	4.3	%	10.2	%

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NOTE 15.   Share Repurchase Authorization

In January 2015, the Board of Directors authorized the Company to repurchase up to 3,000 shares of the Company’s common stock with no established end date. The authorization allows for repurchases to be made in the open market or through negotiated transactions from time to time. During the three months ended March 31, 2016, the Company repurchased 370 shares of common stock. At March 31, 2016, there were 956 shares available for future stock repurchases under this repurchase authorization. Shares of common stock purchased under the share repurchase authorization are retired.

The following table summarizes the Company’s stock repurchases for the three month period ended March 31, 2016 and 2015, respectively:

	Three Months Ended
	March 31,
	2016		2015
Shares of common stock repurchased	370		570
Cost of stock repurchased		$4,700		$6,786
Average price paid per share		$12.70		$11.91

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

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

The forward-looking statements contained herein reflect our expectations with respect to future events and are subject to certain risks, uncertainties and assumptions. Actual results may differ materially from those included in such forward-looking statements for a number of reasons including, but not limited to, the following: variations in the level of orders which can be affected by general economic conditions, seasonality and growth rates in the semiconductor manufacturing industry and in the markets served by our customers, the global economic and political climates, difficulties or delays in product functionality or performance, the delivery performance of sole source vendors, the timing of future product releases, failure to respond adequately to either changes in technology or customer preferences, changes in pricing by us or our competitors, our ability to manage growth, changes in management, risk of nonpayment of accounts receivable, changes in budgeted costs, our ability to leverage our resources to improve our position in our core markets, our ability to weather difficult economic environments, our ability to open new market opportunities and target high-margin markets, the strength/weakness of the back-end and/or front-end semiconductor market segments, our ability to successfully integrate acquired businesses into our business and fully realize, or realize within the expected time frame, the expected combination benefits from the acquisitions, and the “Risk Factors” set forth in Item 1A in our Annual Report on Form 10-K for the year ended December 31, 2015 (“2015 10-K”). The forward-looking statements reflect our position as of the date of this report and we undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Critical Accounting Policies

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

A critical accounting policy is defined as one that is both material to the presentation of our condensed consolidated financial statements and requires management to make difficult, subjective or complex judgments that could have a material effect

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on our financial condition or results of operations. Specifically, these policies have the following attributes: (1) we are required to make judgments and assumptions about matters that are highly uncertain at the time of the estimate; and (2) different estimates we could reasonably have used, or changes in the estimate that are reasonably likely to occur, could have a material effect on our financial position and results of operations.

Estimates and assumptions about future events and their effects cannot be determined with certainty. We base our estimates on historical experience and on various other assumptions believed to be applicable and reasonable under the circumstances. These estimates may change as new events occur, as additional information is obtained and as our operating environment changes. In addition, management is periodically faced with uncertainties, the outcomes of which are not within our control and will not be known for prolonged periods of time. Certain of these uncertainties are discussed in our 2015 10-K in the sections entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Based on a critical assessment of our accounting policies and the underlying judgments and uncertainties affecting the application of those policies, we believe that our condensed consolidated financial statements are fairly stated in accordance with U.S. GAAP, and provide a fair presentation of our financial position and results of operations.

For more information, please see our critical accounting policies as previously disclosed in our 2015 10-K.

See Note 1 to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q regarding the impact of recent accounting pronouncements on our financial position and results of operations.

Results of Operations for the Three Month Periods EndedMarch 31, 2016 and 2015

We are a worldwide leader in the design, development, manufacture and support of process control defect inspection and metrology, advanced packaging lithography, and data analysis systems and software used by microelectronic device manufacturers. We provide process and yield management solutions used in both wafer processing and final manufacturing through a family of standalone systems for macro-defect inspection, lithography, probe card test and analysis, and transparent and opaque thin film measurements. All Rudolph systems feature sophisticated software and production-worthy automation. Rudolph systems are backed by worldwide customer support.

Our business is affected by the annual spending patterns of our customers on semiconductor capital equipment. The amount that our customers devote to capital equipment spending depends on a number of factors, including general worldwide economic conditions as well as other economic drivers such as personal computer, tablet, cell phone, other personal electronic devices and automotive sales. Current forecasts by industry analysts for the semiconductor device manufacturing industry project a year-over-year capital spending of approximately flat to down 5% for 2016. Our revenues and profitability tend to follow the trends of certain segments within the semiconductor market. We monitor capital equipment spending through announced capital spending plans by our customers and monthly-published industry data such as the book-to-bill ratio. The book-to-bill ratio is a 3-month running statistic that compares bookings or orders placed with capital equipment suppliers to billings or shipments. A book-to-bill ratio above 1.0 shows that semiconductor device equipment manufacturers are ordering equipment at a pace that exceeds the equipment suppliers’ shipments for the period. The 3-month rolling average North American semiconductor equipment book-to-bill ratio was 1.2 for the month of March 2016, an increase from book-to-bill ratio of 1.0 for the month of December 2015.

Historically, a significant portion of our revenues in each quarter and year has been derived from sales to relatively few customers, and we expect this trend to continue. For the three month period ended March 31, 2016 and for the years ended December 31, 2015, 2014 and 2013, sales to customers that individually represented at least five percent of our revenues accounted for 39.4%, 23.3%, 23.9%, and 41.6% of our revenues, respectively.

We do not have purchase contracts with any of our customers that obligate them to continue to purchase our products, and they could cease purchasing products from us at any time. A delay in purchase or a cancellation by any of our large customers could cause quarterly revenues to vary significantly. In addition, during a given quarter, a significant portion of our revenues may be derived from the sale of a relatively small number of systems, with one customer accounting for 26.9% of our total revenues for the three month period ended March 31, 2016. The following table lists the average selling price for our systems:

System	Average Selling Price Per System
Macro-defect inspection and probe card and test analysis	$250,000 to $1.8 million
Transparent film measurement	$800,000 to $1.2 million
Opaque film measurements	$1.0 million to $1.8 million
Lithography steppers	$3.0 million to $8.0 million

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A significant portion of our revenues has been derived from customers outside of the United States.  A substantial portion of our international sales are denominated in US dollars. We expect that revenues generated from customers outside of the United States will continue to account for a significant percentage of our revenues. 

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

Revenues. Our revenues are primarily derived from the sale of our systems, services, spare parts and software licensing.  Our revenues were $54.4 million for the three month periods ended March 31, 2016, compared to $52.6 million for the three month periods ended March 31, 2015, representing an increase of 3.4%. 

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

	Three Months Ended
	March 31,
	2016				2015
Systems and Software:
Process Control	$	36,459	67	%	$	36,061	69	%
Lithography	170		—	%	21		—	%
Software	7,422		14	%	7,794		15	%
Parts	7,160		13	%	5,655		10	%
Services	3,151		6	%	3,039		6	%
Total revenue	$	54,362	100	%	$	52,570	100	%

Total systems and software revenue was relatively flat for the three months ended March 31, 2016 compared to the three months ended March 31, 2015. Process Control system revenue increased $0.4 million for the three months ended March 31, 2016, compared to the same period in the prior year. Lithography system revenue increased $0.1 million for the three months ended March 31, 2016, compared to the same period in the prior year. The software revenue decreased for the three months ended March 31, 2016 as compared to three months ended March 31, 2015 primarily due to decreased sales in licensing revenue. Systems revenue generated by our latest product releases and major enhancements in each of our product families amounted to 68% of total revenues for the three month period ended March 31, 2016, compared to 63% of total revenues for the three month period ended March 31, 2015.  The year-over-year increase in total parts and services revenue for the three months ended March 31, 2016 is primarily due to increased spending by our customers on system upgrades and repairs of existing systems. Parts and services revenues are generated from part sales, maintenance service contracts, system upgrades, as well as time and material billable service calls. 

Deferred revenues of $7.8 million are recorded in the Condensed Consolidated Balance Sheets within the captions “Deferred revenue” and “Other non-current liabilities” at March 31, 2016 and primarily consist of $2.1 million for outstanding deliverables and $5.7 million for deferred maintenance agreements.

Gross Profit. Our gross profit has been and will continue to be affected by a variety of factors, including manufacturing efficiencies, excess and obsolete inventory write-offs, pricing by competitors or suppliers, new product introductions, production volume, customization and reconfiguration of systems, international and domestic sales mix, and parts and service margins. Our gross profit was $29.0 million for the three month periods ended March 31, 2016 and 2015.  Our gross profit represented 53.4% of our revenues for the three month period ended March 31, 2016 and 55.1% of our revenues for the same period in the prior year.  The decrease in gross profit as a percentage of revenue for the three month period ended March 31, 2016 compared to the same period in the prior year is primarily due to change in product mix.

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

Research and Development.  Our research and development expense was $12.4 million for the three month period ended March 31, 2016, compared to $10.4 million for the same period in the prior year.  Research and development expense represented 22.9% of our revenues for the three month period ended March 31, 2016, compared to 19.7% of revenues for the prior year period.  Research and development expenses increased for the three month period year-over-year due to increased compensation and project costs.

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Selling, General and Administrative.     Our selling, general and administrative expense was $9.5 million for the three month period ended March 31, 2016, compared to $13.0 million for the same period in the prior year.  Selling, general and administrative expense represented 17.5% of our revenues for the three month period ended March 31, 2016, compared to 24.7% of our revenues for the same period in the prior year.  The year-over-year dollar decrease for the three month period ended March 31, 2016 in selling, general and administrative expense was primarily due to a decrease in share-based compensation costs.

Other Expense. Our other expense consists of foreign currency exchange losses, net. For the three month period ended March 31, 2016, we recorded other expense of $0.1 million, compared to other expense of $0.6 million, for the same period in the prior year. The year-over-year dollar decrease in other expense for the three month period ended March 31, 2016 was primarily due to strengthening of local currencies at our foreign operations compared to the U.S. dollar.

Income Taxes.  We recorded an income tax provision of $5.6 million for the three month period ended March 31, 2016. Our effective tax rate of 28.7% differs from the statutory rate of 35% for the three month period ended March 31, 2016 primarily due to a projected Section 199 manufacturing deduction, additional foreign tax credits generated and the availability of the research and development credit in 2016. For the three month period ended March 31, 2015, we recorded an income tax provision of $1.2 million.

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

Litigation. During the three months ended March 31, 2016, we recorded income from patent litigation judgment of $14.6 million in conjunction with the final court ruling in the patent infringement litigation case against Camtek with the expiration of all opportunities to appeal. As discussed in Part I, Item 3. “Legal Proceedings” of our 2015 10-K and Note 8 in the accompanying condensed consolidated financial statements included in this Quarterly Report on Form 10-Q, we are subject to separate legal proceedings and claims, which include, among other things, our on-going litigation with ITC and further litigation with Camtek.

Liquidity and Capital Resources

At March 31, 2016, we had $148.2 million of cash, cash equivalents and marketable securities and $206.7 million in working capital.  At December 31, 2015, we had $161.5 million of cash, cash equivalents and marketable securities and $197.3 million in working capital.

Operating activities used $6.3 million in net cash and cash equivalents for the three month period ended March 31, 2016.  The net cash and cash equivalents used in operating activities during the three month period ended March 31, 2016 was primarily a result of changes in operating assets and liabilities of $10.4 million partially offset by net income, adjusted to exclude the effect of non-cash operating charges, of $4.0 million. Operating activities provided $11.0 million in net cash and cash equivalents for the three month period ended March 31, 2015. The net cash and cash equivalents provided by operating activities during the three month period ended March 31, 2015 was primarily a result of a net income, adjusted to exclude the effect of non-cash operating charges, of $9.8 million, partially offset by changes in operating assets and liabilities of $1.2 million.

Net cash and cash equivalents provided by investing activities during the three month period ended March 31, 2016 of $5.3 million was due to proceeds from sales of marketable securities of $51.1 million, partially offset by the purchase of marketable securities of $44.3 million and capital expenditures of $1.5 million.  Net cash and cash equivalents used in investing activities during the three month period ended March 31, 2015 of $10.1 million was due to the purchase of marketable securities of $60.5 million and capital expenditures of $1.1 million, partially offset by the proceeds from sales of marketable securities of $51.4 million.

Net cash and cash equivalents used in financing activities during the three month period ended March 31, 2016 of $5.9 million was due primarily to the repurchase of shares of our common stock of $4.7 million and tax payments related to shares withheld for share-based compensation plans of $1.5 million, partially offset by tax benefit and proceeds from sales of shares through share-based compensation plans of $0.3 million. For the three month period ended March 31, 2015 financing activities used $8.5 million resulting from the repurchases of shares of our common stock of $6.8 million and tax payments related to shares withheld for share based compensation plans of $1.9 million, partially offset by tax benefit and proceeds from sales of shares through share-based compensation plans of $0.2 million.

20

In January 2015, our Board of Directors authorized the Company to repurchase up to 3.0 million shares of our common stock with no established end date. The authorization allows for repurchases to be made in the open market or through negotiated transactions from time to time. During the three months ended March 31, 2016, we repurchased 0.4 million shares of common stock. At March 31, 2016, 1.0 million shares remained available for future stock repurchase under this repurchase authorization. Shares of common stock purchased under the share repurchase authorization are being retired. For further information, see Note 15 in the accompanying condensed consolidated financial statements.

We have a credit agreement with Credit Suisse providing for a $60.0 million committed secured line of credit, which will expire on October 31, 2016. We have not utilized the credit agreement to date.

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

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

Item 3.    Quantitative and Qualitative Disclosures about Market Risk

Interest Rate and Credit Market Risk

We are exposed to changes in interest rates and market liquidity including our investments in certain available-for-sale securities. Our available-for-sale securities consist of fixed and variable rate income investments (municipal notes, municipal bonds and corporate bonds). We continually monitor our exposure to changes in interest rates, market liquidity and credit ratings of issuers for our available-for-sale securities. It is possible that we are at risk if interest rates, market liquidity or credit ratings of issuers change in an unfavorable direction. The magnitude of any gain or loss will be a function of the difference between the fixed or variable rate of the financial instrument and the market rate, and our financial condition and results of operations could be materially affected. Based on a sensitivity analysis performed on our financial investments held as of March 31, 2016, an immediate adverse change of 10% in interest rates (e.g. 3.00% to 3.30%) would result in an immaterial decrease in the fair value of our available-for-sale securities and would not have a material impact on our consolidated financial position, results of operations or cash flows.

Foreign Currency Risk

We have branch operations in Taiwan, Singapore and South Korea and wholly-owned subsidiaries in Europe, China and Japan.  Our international subsidiaries and branches operate primarily using local functional currencies.  The intercompany transactions denominated in U.S. dollars appearing on the financial statements of the subsidiaries and branches are remeasured at each quarter-end resulting in gains and losses which are reflected in net income.  A hypothetical 10% appreciation or depreciation in the U.S. dollar relative to the reporting currencies of our foreign operations at March 31, 2016 would have affected the foreign-currency-denominated non-operating expenses of our foreign operations by approximately $0.7 million. We cannot accurately predict future exchange rates or the overall impact of future exchange rate fluctuations on our business, results of operations and financial condition.

A substantial portion of our international sales are denominated in U.S. dollars with the exception of Japan and, as a result, we have relatively little exposure to foreign currency exchange risk with respect to these sales. Substantially all our sales in Japan are denominated in Japanese yen. From time to time, we may enter into forward exchange contracts to economically hedge a portion of, but not all, existing and anticipated foreign currency denominated transactions expected to occur within 12 months. The change in fair value of the forward contracts is recognized in “Other expense” in the Condensed Consolidated Statements of Operations for each reporting period. As of March 31, 2016, we had thirteen forward contracts outstanding with a total notional contract value of $4.5 million. We do not use derivative financial instruments for trading or speculative purposes.

Item 4.  Controls and Procedures

We maintain a set of disclosure controls and procedures, as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Exchange Act, designed to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer (CEO) and Chief

21

Financial Officer (CFO), as appropriate, to allow for timely decisions regarding required disclosure. The disclosure controls and procedures are designed to provide reasonable assurance of achieving the desired control objectives. 

Scope of the Controls Evaluation

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

Conclusions

As of March 31, 2016, an evaluation of our disclosure controls and procedures was carried out under the supervision and with the participation of our management, including the CEO and CFO. Based on this evaluation, the CEO and CFO have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of the end of the period covered by this Quarterly Report on Form 10-Q.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II    OTHER INFORMATION

Item 1.   Legal Proceedings

For a description of our previously reported legal proceedings refer to “Part I, Item 3 - Legal Proceedings” in our 2015 10-K, as updated in Note 8 to the accompanying unaudited condensed consolidated financial statements.

We are party to other ordinary and routine litigation incidental to our business. We do not expect the outcome of any pending litigation to have a material adverse effect on our consolidated financial position or results of operations.

Item 1A.    Risk Factors

There were no material changes to our risk factors discussed in Part I, Item 1A - Risk Factors in our 2015 10-K.

22

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

In January 2015, our Board of Directors authorized the Company to repurchase up to 3.0 million shares of our common stock with no established end date. The authorization allows for repurchases to be made in the open market or through negotiated transactions from time to time. During the three months ended March 31, 2016, the Company repurchased approximately 0.4 million shares of common stock. At March 31, 2016, 1.0 million shares remained available for future stock repurchase under this repurchase authorization. Shares of common stock purchased under the share repurchase authorization are being retired. For further information, see Note 15 in the accompanying condensed consolidated financial statements.

In addition to the Company’s share repurchase program, it withholds common stock shares associated with net share settlements to cover tax withholding obligations upon the vesting of restricted stock unit awards under the Company’s equity incentive program. During the three months ended March 31, 2016,  the Company withheld 118 thousand shares through net share settlements.  For the three month period ended March 31, 2016 net share settlements cost $1.5 million. Please refer to Note 9 of the Notes to Condensed Consolidated Financial Statements for further additional information regarding the Company’s share-based compensation plans.

The following table provides details of common stock purchased during the three month period ended March 31, 2016 (in thousands, except per share data):

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Maximum Number of Shares that May Yet Be Purchased Under the Program
January 1, 2016 - January 31, 2016	44	$	12.24	—	1,326
February 1, 2016 - February 29, 2016	158	$	11.92	150	1,176
March 1, 2016 - March 31, 2016	286	$	13.25	220	956
Three months ended March 31, 2016	488	$	12.73	370	956

Item 3.    Defaults Upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

None.

Item 5.    Other Information

None.

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Item 6.   Exhibits

Exhibit No.	Description
31.1	Certification of Michael P. Plisinski, Chief Executive Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
31.2	Certification of  Steven R. Roth, Chief Financial Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Michael P. Plisinski, Chief Executive Officer of Rudolph Technologies, Inc.
32.2	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Steven R. Roth, Chief Financial Officer of Rudolph Technologies, Inc.
101.INS	XBRL Instance Document
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

24

SIGNATURES

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

		Rudolph Technologies, Inc.
Date:	May 3, 2016	By:	/s/  Michael P. Plisinski
		Michael P. Plisinski
		Chief Executive Officer
Date:	May 3, 2016	By:	/s/  Steven R. Roth
		Steven R. Roth
		Senior Vice President, Chief Financial Officer and Principal Accounting Officer

25

EXHIBIT INDEX

Exhibit No.	Description
31.1	Certification of Michael P. Plisinski, Chief Executive Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
31.2	Certification of  Steven R. Roth, Chief Financial Officer, pursuant to Securities Exchange Act Rule 13a-14(a).
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Michael P. Plisinski, Chief Executive Officer of Rudolph Technologies, Inc.
32.2	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed by Steven R. Roth, Chief Financial Officer of Rudolph Technologies, Inc.
101.INS	XBRL Instance Document
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

26

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

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

I, Michael P. Plisinski, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rudolph Technologies, Inc.;

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

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

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

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

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

Date: May 3, 2016

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

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

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

I, Steven R. Roth, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rudolph Technologies, Inc.;

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

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

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

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

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

Date: May 3, 2016

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

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael P. Plisinski, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Rudolph Technologies, Inc. on Form 10-Q for the quarter ended March 31, 2016 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 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 Rudolph Technologies, Inc.

Date: May 3, 2016

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

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Steven R. Roth, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Rudolph Technologies, Inc. on Form 10-Q for the quarter ended March 31, 2016 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 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 Rudolph Technologies, Inc.

Date: May 3, 2016

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

XML

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2016	Apr. 18, 2016
Entity Information [Line Items]
Entity Registrant Name	RUDOLPH TECHNOLOGIES INC
Entity Central Index Key	0001094392
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		30,882,205

XML

Statements of Financial Position Consolidated Balance Sheet - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Cash and Cash Equivalents, at Carrying Value	$ 38,186	$ 44,554
Marketable Securities, Current	110,055	116,924
Accounts Receivable, Net, Current	64,747	55,492
Inventory, Net	74,143	71,490
Prepaid Expense and Other Assets	21,519	8,137
Assets, Current	308,650	296,597
Property, Plant and Equipment, Net	13,950	12,346
Goodwill	22,495	22,495
Intangible Assets, Net (Excluding Goodwill)	11,998	12,593
Other Assets, Noncurrent	35,616	35,532
Assets	392,709	379,563
Liabilities, Current [Abstract]
Accounts Payable and Accrued Liabilities	20,029	21,466
Taxes Payable, Current	5,697	1,163
Deferred Revenue, Current	6,713	6,441
Convertible Debt, Current	58,863	57,846
Other Liabilities, Current	10,627	12,415
Liabilities, Current	101,929	99,331
Convertible senior notes		57,846
Other Liabilities, Noncurrent	10,269	9,554
Liabilities	$ 112,198	$ 108,885
Commitments and Contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock, Value, Issued	$ 31	$ 31
Additional Paid in Capital, Common Stock	390,190	394,928
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,991)	(2,623)
Retained Earnings (Accumulated Deficit)	(107,719)	(121,658)
Stockholders' Equity Attributable to Parent	280,511	270,678
Liabilities and Equity	$ 392,709	$ 379,563

XML

Statements of Financial Position B/S Parenthetical - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable, Current	$ 703	$ 713

XML

Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues	$ 54,362	$ 52,570
Cost of Revenue	25,317	23,604
Gross Profit	29,045	28,966
Operating Expenses [Abstract]
Research and Development Expense	12,446	10,360
Selling, General and Administrative Expense	9,499	12,974
Gain (Loss) Related to Litigation Settlement	(14,632)	0
Amortization of Intangible Assets	595	515
Operating Expenses	7,908	23,849
Operating Income (Loss)	21,137	5,117
Interest Expense, net	1,469	1,382
Total other expenses (income)	107	638
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	19,561	3,097
Income Tax Expense (Benefit)	5,622	1,249
Net Income (Loss) Attributable to Parent	$ 13,939	$ 1,848
Earnings (Loss) Per Share, Basic	$ 0.45	$ 0.06
Earnings (Loss) Per Share, Diluted	$ 0.44	$ 0.06
Weighted Average Number of Shares Outstanding, Basic	30,957	31,928
Weighted Average Number of Shares Outstanding, Diluted	31,654	32,549

XML

Statements of Comprehensive Income (Loss) Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income (Loss) Attributable to Parent	$ 13,939	$ 1,848
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	(6)	(1)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	638	447
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 14,571	$ 2,294

XML

Statements of Cash Flows Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income (Loss) Attributable to Parent	$ 13,939	$ 1,848
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Amortization	595	515
Amortization of Financing Costs and Discounts	1,017	914
Depreciation	944	898
Foreign Currency Transaction Gain (Loss), before Tax	107	638
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset	117	(396)
Share-based Compensation	1,161	4,410
Provision for doubtful accounts and inventory valuation	800	923
Gain (Loss) Related to Litigation Settlement	(14,632)	0
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(10,371)	1,281
Net Cash Provided by (Used in) Operating Activities	(6,323)	11,031
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Marketable Securities	(44,311)	(60,458)
Proceeds from Sale and Maturity of Marketable Securities	51,120	51,381
Payments to Acquire Property, Plant, and Equipment	(1,514)	(1,072)
Net Cash Provided by (Used in) Investing Activities	5,295	(10,149)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments for Repurchase of Common Stock	(4,700)	(6,786)
Payments Related to Tax Withholding for Share-based Compensation	(1,509)	(1,868)
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	6	61
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	304	93
Net Cash Provided by (Used in) Financing Activities	(5,899)	(8,500)
Effect of Exchange Rate on Cash and Cash Equivalents	559	(131)
Cash and Cash Equivalents, Period Increase (Decrease)	(6,368)	(7,749)
Cash and Cash Equivalents, at Carrying Value	38,186	35,365
Supplemental Cash Flow Information [Abstract]
Income Taxes Paid	1,068	356
Interest Paid	$ 1,125	$ 1,125

XML

Basis of Presentation (Notes)

3 Months Ended

Mar. 31, 2016

Organization and Nature of Operations: [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Basis of Presentation

The accompanying interim unaudited condensed consolidated financial statements have been prepared by Rudolph Technologies, Inc. (the “Company” or “Rudolph”) and in the opinion of management reflect all adjustments, consisting of normal recurring accruals, necessary for their fair presentation in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  Preparing financial statements requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes.  Actual amounts could differ materially from reported amounts.  The interim results for the three month period ended March 31, 2016 are not necessarily indicative of results to be expected for the entire year or any future periods.  This interim financial information should be read in conjunction with the financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 (“2015 10-K”) filed with the Securities and Exchange Commission (“SEC”). The accompanying condensed consolidated balance sheet at December 31, 2015 has been derived from the audited consolidated financial statements included in the 2015 10-K.

Reclassifications

Certain immaterial prior period amounts have been reclassified to conform to the current financial statement presentation.

Debt Issuance Costs:

In the first quarter of 2016, the Company adopted Accounting Standards Update (ASU) No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30), Simplifying the Presentation of Debt Issuance Costs,” which requires entities to present debt issuance costs related to a debt liability as a direct deduction from the carrying amount of that debt liability on the balance sheet as opposed to being presented as a deferred charge. For all periods presented in this Form 10-Q for the quarter ended March 31, 2016, unamortized debt issuance costs related to the Company’s convertible senior notes are reported on the Consolidated Balance Sheets as a reduction of the carrying value of the related debt. Prior to adoption, the Company reported the unamortized debt issuance costs in “Other Assets” on the Consolidated Balance Sheets. As of December 31, 2015, the change in presentation resulted in a reduction of “Other Assets” of $261 and a corresponding decrease in “Convertible Senior Notes” with no impact on the Company’s Consolidated Statements of Operations.

Recent Accounting Pronouncements

In March 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting”. The standard was issued as part of the Simplification Initiative which involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The standard is effective for annual periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. The Company is in the process of determining the adoption methods as well as the effects the adoption of ASU No. 2016-09 will have on its consolidated financial position, results of operations, and cash flows.

In March 2016, the FASB issued ASU No. 2016-07, Investments-Equity Method and Joint Ventures (Topic 323). The standard was issued as part of the Simplification Initiative which eliminates the requirement that when an investment qualifies for use of the equity method as of a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method has been in effect during all previous periods that the investment had been held. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-07 will have on its consolidated financial position, results of operations, and cash flows.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The standard requires that lessees will be required to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. ASU No. 2016-02 also will require disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative information. The standard will take effect for fiscal years and interim periods within those fiscal years beginning after December 15, 2018 with earlier adoption permitted. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-02 will have on its consolidated financial position, results of operations, and cash flows.

In January 2016, the FASB issued ASU 2016-01, “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” The pronouncement requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income, requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset, and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. These changes become effective for the Company’s fiscal year beginning January 1, 2018. The Company is in the process of evaluating the effects the adoption of ASU No. 2016-01 will have on its consolidated financial position, results of operations, and cash flows.

In July 2015, the FASB issued ASU No. 2015-11, “Inventory (Topic 330), Simplifying the Measurement of Inventory.” This ASU is intended to simplify subsequent measurement of inventory. An entity should measure inventory within the scope of this ASU at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable cost of completion, disposal, and transportation. The standard is effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. The adoption of ASU 2015-11 is not expected to have a material effect on the Company’s consolidated financial position, results of operations, and cash flows.

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU No. 2014-09 outlines a comprehensive revenue recognition model and supersedes most current revenue recognition guidance. In July 2015, the FASB deferred for one year the effective date of the new revenue standard, but early adoption will be permitted. The new standard will be effective for the Company on January 1, 2018. ASU No. 2014-09 allows for two methods of adoption: (a) “full retrospective” adoption, meaning the standard is applied to all periods presented, or (b) “modified retrospective” adoption, meaning the cumulative effect of applying ASU No. 2014-09 is recognized as an adjustment to the 2018 opening retained earnings balance. The Company is in the process of determining the adoption method as well as the effects the adoption of ASU No. 2014-09 will have on its consolidated financial position, results of operations, and cash flows.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2016

Fair Value Measurements [Abstract]

Fair Value Disclosures [Text Block]

Fair Value Measurements

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

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2016 and December 31, 2015:

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2016
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	109,217	$	—	$	109,217	$	—
Corporate bonds	838		—		838		—
Total Assets	$	110,055	$	—	$	110,055	$	—
Liabilities:
Foreign currency forward contracts	289		$	—	$	289	$	—
Contingent consideration - acquisitions	3,820		—		—		3,820
Total Liabilities	$	4,109	$	—	$	289	$	3,820
December 31, 2015
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	116,089	$	—	$	116,089	$	—
Corporate bonds	835		—		835		—
Total Assets	$	116,924	$	—	$	116,924	$	—
Liabilities:
Foreign currency forward contracts	$	85	$	—	$	85	$	—
Contingent consideration - acquisitions	3,703		—		—		3,703
Total Liabilities	$	3,788	$	—	$	85	$	3,703

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

Level 3 liabilities consisted of contingent consideration related to an acquisition for which the Company uses a discounted cash flow model to value these liabilities. The Level 3 assumptions used in the discounted cash flow model for the contingent consideration included projected revenues, estimates of discount rates of 9.1% and timing of cash flows. A significant decrease in the projected revenues or increase in discount rates could result in a significantly lower fair value measurement for the contingent consideration.

This table presents a reconciliation for all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months endedMarch 31, 2016:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2015	$	3,703
Additions	—
Total loss included in selling, general and administrative expense	117
Payments	—
Transfers into (out of) Level 3	—
Balance at March 31, 2016	$	3,820

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

Fair Value of Other Financial Instruments

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

The Company’s convertible senior notes are not publicly traded. The estimated fair value of the Company’s convertible senior notes was valued using a discounted cash flow model. The Level 3 assumptions, based on data available at the valuation date used in preparing the discounted cash flow model, included estimates of interest rates, timing and amount of cash flows and expected holding periods of the convertible senior notes. The fair value of the contingent interest associated with the convertible senior notes is valued quarterly using the present value under an expected cash flow model incorporating the probabilities of the contingent events occurring.

The following table reflects information pertaining to the Company’s convertible senior notes:

	March 31, 2016			December 31, 2015
Net carrying value of convertible senior notes	$	58,863		$	57,846
Estimated fair value of convertible senior notes	$	60,240		$	60,630
Estimated interest rate used in discounted cash flow model	5.0		%	5.0		%
Fair value of contingent interest	$	—		$	—

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Marketable Securities

3 Months Ended

Mar. 31, 2016

Marketable Securities [Abstract]

Marketable Securities [Text Block]

Marketable Securities

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

The Company has determined that the gross unrealized losses on its marketable securities at March 31, 2016 and December 31, 2015 are temporary in nature. The Company reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. Factors considered in determining whether a loss is other-than-temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value.

At March 31, 2016 and December 31, 2015, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2016
Municipal notes and bonds	$	109,223	$	14	$	20	$	109,217
Corporate bonds	$	838	$	—	$	—	$	838
Total marketable securities	$	110,061	$	14	$	20	$	110,055
December 31, 2015
Municipal notes and bonds	$	116,086	$	18	$	15	$	116,089
Corporate bonds	$	838	$	—	$	3	$	835
Total marketable securities	$	116,924	$	18	$	18	$	116,924

 The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheet classification, is as follows at March 31, 2016 and December 31, 2015:

	March 31, 2016				December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	99,920	$	99,914	$	113,542	$	113,549
Due after one through five years	10,141		10,141		3,382		3,375
Due after five through ten years	—		—		—		—
Due after ten years	—		—		—		—
Total marketable securities	$	110,061	$	110,055	$	116,924	$	116,924

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position at March 31, 2016 and December 31, 2015:  

	Unrealized Loss Position For Less Than 12 Months				Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2016
Municipal notes and bonds	$	57,835	$	20	$	—	$	—
Total	$	57,835	$	20	$	—	$	—
December 31, 2015
Municipal notes and bonds	$	52,638	$	15	$	305	$	1
Corporate bonds	835		3		—		—
Total	$	53,473	$	18	$	305	$	1

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

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

Derivative Instruments and Hedging Activities

The Company, when it considers it to be appropriate, enters into forward contracts to hedge the economic exposures arising from foreign currency denominated transactions. At March 31, 2016 and December 31, 2015, these contracts included the future sale of Japanese Yen to purchase U.S. dollars. Derivative instruments are recognized as either prepaid expenses and other current assets or other current liabilities in the Condensed Consolidated Balance Sheets and are measured at fair value. The foreign currency forward contracts were entered into by the Company’s Japanese subsidiary to economically hedge a portion of certain intercompany obligations. The forward contracts are not designated as hedges for accounting purposes and decreases in the fair value of $204 and $78 for the three month periods ended March 31, 2016 and 2015, respectively, are recorded within the caption “Other expense” in the Condensed Consolidated Statements of Operations.

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2016 and December 31, 2015 were as follows:

	March 31, 2016		December 31, 2015
Notional amount	$	4,525	$	5,423
Fair value of liability	$	289	$	85

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Identifiable Intangible Assets

3 Months Ended

Mar. 31, 2016

Finite-Lived Intangible Assets [Line Items]

Intangible Assets Disclosure [Text Block]

Purchased Intangible Assets

Purchased intangible assets as of March 31, 2016 and December 31, 2015 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2016
Finite-lived intangibles:
Developed technology	$	65,527	$	55,592	$	9,935
Customer and distributor relationships	9,560		8,258		1,302
Trade names	4,361		3,600		761
Total identifiable intangible assets	$	79,448	$	67,450	$	11,998
December 31, 2015
Finite-lived intangibles:
Developed technology	$	65,527	$	55,110	$	10,417
Customer and distributor relationships	9,560		8,170		1,390
Trade names	4,361		3,575		786
Total identifiable intangible assets	$	79,448	$	66,855	$	12,593

Intangible asset amortization expense for the three months endedMarch 31, 2016 and 2015 was $595 and $515, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expense for the remainder of 2016 will be $1,726, and for each of the next five years estimated amortization expense amounts to $1,933 for 2017, $1,496 for 2018, $1,496 for 2019, $1,294 for 2020, and $546 for 2021.

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Balance Sheet Details

3 Months Ended

Mar. 31, 2016

Balance Sheet Detail [Abstract]

Balance Sheet Details [Text Block]

Balance Sheet Details

Inventories

Inventories are comprised of the following:

	March 31, 2016		December 31, 2015
Materials	$	39,345	$	39,022
Work-in-process	23,161		18,918
Finished goods	11,637		13,550
Total inventories	$	74,143	$	71,490

The Company has established reserves of $9,515 and $8,896 as of March 31, 2016 and December 31, 2015, respectively, for slow moving and obsolete inventory, which are included in the amounts above.

Prepaid expenses and other current assets

Prepaid expenses and other current assets are comprised of the following:

	March 31, 2016		December 31, 2015
Patent litigation judgment	$	14,632	$	—
Other	6,887		8,137
Total prepaid expenses and other current assets	$	21,519	$	8,137

Property, Plant and Equipment

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

	March 31, 2016		December 31, 2015
Land and building	$	2,584	$	5,024
Machinery and equipment	23,952		21,683
Furniture and fixtures	2,671		3,414
Computer equipment	5,595		5,304
Leasehold improvements	8,089		7,884
	42,891		43,309
Less: Accumulated depreciation	28,941		30,963
Total property, plant and equipment, net	$	13,950	$	12,346

In February 2016, the Company consolidated its New Jersey locations into its Budd Lake, NJ facility and vacated its corporate offices in Flanders, NJ. The Flanders, NJ corporate office location is classified as an asset held for sale. The Company believes the facility will be sold within the next 12 months and has classified the facility as current assets held for sale in “Prepaid and other assets”. Assets held for sale as of March 31, 2016 consist of land with a cost of $168 and buildings with a cost and net book value of $939 and $51, respectively.

Other assets

Other assets is comprised of the following:

	March 31, 2016		December 31, 2015
Deferred income taxes	$	35,047	$	34,973
Other	569		559
Total other assets	$	35,616	$	35,532

Other current liabilities

Other current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Litigation accrual	$	3,252	$	3,252
Contingent consideration - acquisitions	717		1,407
Other	6,658		7,756
Total other current liabilities	$	10,627	$	12,415

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Unrecognized tax benefits (including interest)	$	2,963	$	3,152
Contingent consideration - acquisitions	3,103		2,296
Deferred revenue	1,128		1,206
Other	3,075		2,900
Total other non-current liabilities	$	10,269	$	9,554

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Debt Obligations

3 Months Ended

Mar. 31, 2016

Debt Obligations [Abstract]

Debt Disclosure [Text Block]

Debt Obligations

On July 25, 2011, the Company issued $60,000 aggregate principal amount of 3.75% Convertible Senior Notes due 2016 (the “Notes”) at par. The Notes were issued pursuant to an indenture, dated as of July 25, 2011, between the Company and Bank of New York Mellon Trust Company, N.A., as Trustee, which includes a form of Note. The Notes provide for the payment of interest semi-annually in arrears on January 15 and July 15 of each year, beginning January 15, 2012, at an annual rate of 3.75% and will mature on July 15, 2016, unless earlier converted or repurchased. The Notes may be converted, under certain circumstances, based on an initial conversion rate of 77.241 shares of Company common stock per $1 principal amount of Notes, which represents an initial conversion price of approximately $12.95 per share. Concurrently with the issuance of the Notes, the Company purchased a convertible note hedge and sold a warrant. Each of the convertible note hedge and warrant transactions were entered into with an affiliate of the initial purchaser of the Notes. The convertible note hedge is intended to reduce the potential future dilution to the Company’s common stock associated with the conversion of the Notes. However, the warrant transaction will have a dilutive effect on the Company’s earnings per share to the extent that the price of the Company’s common stock exceeds the strike price of the warrant. The strike price of the warrant is $17.00 per share subject to adjustment in accordance with the terms of the agreement. The net proceeds to the Company from the sale of the Notes, including the convertible note hedge and warrant, were $50,249.

The following table reflects the net carrying value of the Notes:

	March 31, 2016		December 31, 2015
Convertible senior notes	$	60,000	$	60,000
Less: Unamortized interest discount	999		1,893
Less: Unamortized debt issuance costs	138		261
Net carrying value of convertible senior notes	$	58,863	$	57,846

The following table presents the amount of interest cost recognized relating to the Notes during the three months endedMarch 31, 2016 and March 31, 2015:

	Three Months Ended March 31,
	2016		2015
Contractual interest coupon	$	562	$	562
Amortization of interest discount	894		811
Amortization of debt issuance costs	123		103
Total interest cost recognized	$	1,579	$	1,476

The remaining bond discount of $999 and debt issuance costs of $138 relating to the Notes, as of March 31, 2016, will be amortized over the remaining life of the Notes.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2016

Commitments and Contingencies [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Commitments and Contingencies

Warranty Reserves

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

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

	Three Months Ended March 31,
	2016		2015
Balance, beginning of the period	$	1,894	$	1,574
Accruals	544		822
Less: Usage	665		696
Balance, end of the period	$	1,773	$	1,700

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

Legal Matters

From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business. The Company’s 2015 10-K reflects the status of the Company’s litigation with Integrated Technology Corporation (“ITC”) and Camtek, Ltd. (“Camtek”). The following reflects the material developments during the three months ended March 31, 2016 with regard to these matters.

Integrated Technology Corporation v. Rudolph Technologies, Inc., No. CV-06-2182 (PHX-ROS): This matter is fully resolved with the sole exception of the issue of remanded attorney’s fees which were set by the U.S. District Court for the District of Arizona (the “AZ District Court”) at $3,252. A hearing regarding the Company’s appeal of this order was held on October 6, 2015 and the U.S. Federal Court of Appeals (the “Court of Appeals”). The Court of Appeals issued a ruling that the award was improperly established, vacated the amount of the award and remanded the matter back to the AZ District Court for a determination of a proper fee award. The Company believes that it has meritorious defenses regarding this issue and intends to continue to vigorously prosecute the matter. The $3,252 is held in escrow and is recorded in “Prepaid expenses and other current assets” in the Consolidated Balance Sheet at March 31, 2016. The corresponding liability is recorded under the caption “Other current liabilities” in the Condensed Consolidated Balance Sheet at March 31, 2016. The Company expects this to be the maximum liability reasonably possible for the attorney’s fees, excluding interest, for this lawsuit with respect to both the pre-August 2007 and the post-August 2007 tools which were the subject of this action.

August Technology Corporation and Rudolph Technologies, Inc. v. Camtek, Ltd., No. 05-CV-01396 (JRT/FLN): Subsequent to the ruling by the U.S. District Court for the District of Minnesota (the “MN District Court”) in the Company’s favor that Camtek’s Falcon tools continue to infringe the Company’s patent under the revised claim construction of the patent determined by the Court of Appeals, the MN District Court, on February 9, 2015, issued an Order granting the Company’s Motion for Final Judgment, reinstating the original damages and applying prejudgment interest for a total award of $14,512. In addition, the MN District Court issued a permanent injunction against Camtek from “making, using, selling and offering to sell any of its Falcon machines and any machines that are colorable imitations thereof in the United States, intended for sale and use within the United States, until the expiration of the ‘6,298 patent,” which is projected to be in 2020. While, in March of 2015, Camtek filed an appeal with the Court of Appeals challenging the MN District Court’s ruling, the Court of Appeals denied Camtek’s appeal on February 3, 2016, affirming both the infringement ruling and the damages and interest totaling approximately $14,632 million assessed against Camtek by the MN District Court, the payment of which is guaranteed by a supersedeas bond. All of Camtek’s rights to appeal the final judgment have now expired. On March 14, 2016 the Company filed its request to the MN District Court to release payment under the bond and is currently awaiting a response from the Court. The Company recorded the judgment in “Prepaid expenses and other current assets” in the Consolidate Balance Sheets as of March 31, 2016 as the gain contingency was realized upon completion of the appeal process.

August Technology Corporation and Rudolph Technologies, Inc. v. Camtek, Ltd., No. 10-CV-2202 (MJD/FLN): With regard to the Company’s subsequently filed lawsuit against Camtek in the MN District Court alleging infringement of its U.S. Patent No. 7,729,528, this lawsuit continues to be stayed pending resolution of a re-examination petition filed by Camtek with the U.S. Patent and Trademark Office.

Rudolph Technologies, Inc. v. Camtek, Ltd., No. 15-CV-1246 (ADM/BRT): On March 12, 2015, the Company filed and served on Camtek a complaint asserting infringement of Rudolph ‘6,298 patent by Camtek’s Eagle product with the MN District Court. On April 21, 2015, the Company filed a Motion for Preliminary Injunction to enjoin Camtek’s sale of the Eagle device in the United States which is currently pending. On or about April 20, 2015, Camtek filed a complaint in the U.S. District Court for the District of New Jersey (the “NJ District Court”) seeking a declaratory judgment challenging the jurisdiction and venue of the Minnesota court and seeking to have the NJ District Court find that the ‘6,298 patent is not infringed and, in the alternative, that the ‘6,298 patent is invalid. On August 26, 2015, the MN District Court ruled that Minnesota jurisdiction was appropriate for this matter while at the same time denying the Company’s Motion for Preliminary Injunction. Camtek’s complaint filed in the NJ District Court was subsequently dismissed. This matter is currently in discovery phase of the litigation.

Line of Credit

The Company has a credit agreement with Credit Suisse providing for a $60,000 committed secured revolving line of credit, which will expire on October 31, 2016. The Company has not utilized the credit agreement to date.

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Share-Based Compensation

3 Months Ended

Mar. 31, 2016

Share-based Compensation [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Share-Based Compensation

Restricted Stock Unit Activity

A summary of the Company’s nonvested restricted stock unit activity with respect to the three months ended March 31, 2016 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015	1,169	$	11.40
Granted	162	$	12.31
Less: Vested	268	$	10.51
Less: Forfeited	7	$	11.16
Nonvested at March 31, 2016	1,056	$	11.76

As of March 31, 2016 and December 31, 2015, there was $8,930 and $8,221 of total unrecognized compensation cost related to restricted stock units granted under the Company’s stock plans, respectively.  That cost is expected to be recognized over a weighted average period of 3.0 years and 2.6 years for the respective periods.

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Other Expense (Income)

3 Months Ended

Mar. 31, 2016

Other Income (Expense) [Abstract]

Other Income and Other Expense Disclosure [Text Block]

Other Expense

	Three Months Ended
	March 31,
	2016		2015
Foreign currency exchange losses, net	$	107	$	638
Total other expense	$	107	$	638

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Income Taxes

3 Months Ended

Mar. 31, 2016

Income Taxes [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes

The following table provides details of income taxes:

	Three Months Ended
	March 31,
	2016			2015
Income before income taxes	$	19,561		$	3,097
Provision for income taxes	$	5,622		$	1,249
Effective tax rate	28.7		%	40.3		%

The income tax provision for the three months endedMarch 31, 2016 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year. The changes in the Company’s effective tax rate for the three months endedMarch 31, 2016 compared to the same period for the prior year are primarily due to the mix of forecasted earnings by jurisdictions, additional foreign tax credits generated and the availability of the research and development credit in 2016.

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt. Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing the need for a valuation allowance. As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets. The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if appropriate. The Company has a recorded valuation allowance against certain of its deferred tax assets of $2,205 as of March 31, 2016 and December 31, 2015.

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Earnings Per Share

3 Months Ended

Mar. 31, 2016

Earnings (Loss) Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings Per Share

Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period.  Diluted earnings per share is computed in the same manner and also gives effect to all dilutive common equivalent shares outstanding during the period.  Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive. In accordance with U.S. GAAP, these shares were not included in calculating diluted earnings per share. For the three months endedMarch 31, 2016, the weighted average number of stock options and restricted stock units excluded from the computation of diluted earnings per share were 151 and 0, respectively. For the three months endedMarch 31, 2015, all outstanding stock options and restricted stock units totaling 299 and 0, respectively, were excluded from the computation of diluted loss per share because the effect in the periods would be anti-dilutive. Diluted earnings per share-weighted average shares outstanding do not include any effect resulting from assumed conversion of the Notes and warrants as their impact would be anti-dilutive.

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

	Three Months Ended March 31,
	2016		2015
Numerator:
Net income	$	13,939	$	1,848
Denominator:
Basic earnings per share - weighted average shares outstanding	30,957		31,928
Effect of potential dilutive securities:
Employee stock options and restricted stock units - dilutive shares	697		621
Diluted earnings per share - weighted average shares outstanding	31,654		32,549
Earnings per share:
Basic	$	0.45	$	0.06
Diluted	$	0.44	$	0.06

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Accumulated Other Comprehensive Loss (Notes)

3 Months Ended

Mar. 31, 2016

Accumulated Other Comprehensive Loss [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive Loss

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

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

	Foreign currency translation adjustments			Net unrealized losses on available-for-sale investments		Accumulated other comprehensive loss (income)
Beginning Balance, December 31, 2015	$	2,623		$	—	$	2,623
Net current period other comprehensive loss (income)	(638		)	6		(632		)
Reclassifications	—			—		—
Ending balance, March 31, 2016	$	1,985		$	6	$	1,991

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Segment Reporting and Geographic Information

3 Months Ended

Mar. 31, 2016

Segment Reporting and Geographic Information [Abstract]

Segment Reporting Disclosure [Text Block]

Segment Reporting and Geographic Information

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

The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2016				2015
Systems and Software:
Process Control	$	36,459	67	%	$	36,061	69	%
Lithography	170		—	%	21		—	%
Software	7,422		14	%	7,794		15	%
Parts	7,160		13	%	5,655		10	%
Services	3,151		6	%	3,039		6	%
Total revenue	$	54,362	100	%	$	52,570	100	%

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

	Three Months Ended
	March 31,
	2016		2015
United States	$	7,388	$	17,648
Taiwan	22,035		13,329
Japan	2,937		1,314
China	8,825		6,088
South Korea	1,623		3,531
Singapore	7,047		1,738
Other Asia	871		39
Germany	697		7,055
Other Europe	2,939		1,828
Total revenue	$	54,362	$	52,570

The following customers each accounted for more than 10% of total revenues for the indicated periods.

	Three Months Ended
	March 31,
	2016		2015
Customer A	26.9	%	11.1	%
Customer B	4.3	%	10.2	%

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Share Repurchase Program

3 Months Ended

Mar. 31, 2016

Share Repurchase Program [Abstract]

Share Repurchase [Text Block]

Share Repurchase Authorization

In January 2015, the Board of Directors authorized the Company to repurchase up to 3,000 shares of the Company’s common stock with no established end date. The authorization allows for repurchases to be made in the open market or through negotiated transactions from time to time. During the three months ended March 31, 2016, the Company repurchased 370 shares of common stock. At March 31, 2016, there were 956 shares available for future stock repurchases under this repurchase authorization. Shares of common stock purchased under the share repurchase authorization are retired.

The following table summarizes the Company’s stock repurchases for the three month period ended March 31, 2016 and 2015, respectively:

	Three Months Ended
	March 31,
	2016		2015
Shares of common stock repurchased	370		570
Cost of stock repurchased		$4,700		$6,786
Average price paid per share		$12.70		$11.91

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Fair Value Measurements - (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Measurements [Abstract]

Fair Value, Measurement Inputs, Disclosure [Table Text Block]

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at March 31, 2016 and December 31, 2015:

			Fair Value Measurements Using
	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2016
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	109,217	$	—	$	109,217	$	—
Corporate bonds	838		—		838		—
Total Assets	$	110,055	$	—	$	110,055	$	—
Liabilities:
Foreign currency forward contracts	289		$	—	$	289	$	—
Contingent consideration - acquisitions	3,820		—		—		3,820
Total Liabilities	$	4,109	$	—	$	289	$	3,820
December 31, 2015
Assets:
Available-for-sale debt securities:
Municipal notes and bonds	$	116,089	$	—	$	116,089	$	—
Corporate bonds	835		—		835		—
Total Assets	$	116,924	$	—	$	116,924	$	—
Liabilities:
Foreign currency forward contracts	$	85	$	—	$	85	$	—
Contingent consideration - acquisitions	3,703		—		—		3,703
Total Liabilities	$	3,788	$	—	$	85	$	3,703

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

This table presents a reconciliation for all liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months endedMarch 31, 2016:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at December 31, 2015	$	3,703
Additions	—
Total loss included in selling, general and administrative expense	117
Payments	—
Transfers into (out of) Level 3	—
Balance at March 31, 2016	$	3,820

Fair value convertible senior notes [Table Text Block]

The following table reflects information pertaining to the Company’s convertible senior notes:

	March 31, 2016			December 31, 2015
Net carrying value of convertible senior notes	$	58,863		$	57,846
Estimated fair value of convertible senior notes	$	60,240		$	60,630
Estimated interest rate used in discounted cash flow model	5.0		%	5.0		%
Fair value of contingent interest	$	—		$	—

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Marketable Securities - (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of Available-for-sale Securities [Line Items]

Schedule of marketable securities by category [Table Text Block]

At March 31, 2016 and December 31, 2015, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
March 31, 2016
Municipal notes and bonds	$	109,223	$	14	$	20	$	109,217
Corporate bonds	$	838	$	—	$	—	$	838
Total marketable securities	$	110,061	$	14	$	20	$	110,055
December 31, 2015
Municipal notes and bonds	$	116,086	$	18	$	15	$	116,089
Corporate bonds	$	838	$	—	$	3	$	835
Total marketable securities	$	116,924	$	18	$	18	$	116,924

Schedule of marketable securities classified by contractual maturity date [Table Text Block]

The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheet classification, is as follows at March 31, 2016 and December 31, 2015:

	March 31, 2016				December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	99,920	$	99,914	$	113,542	$	113,549
Due after one through five years	10,141		10,141		3,382		3,375
Due after five through ten years	—		—		—		—
Due after ten years	—		—		—		—
Total marketable securities	$	110,061	$	110,055	$	116,924	$	116,924

Schedule of marketable securities in unrealized loss positions [Table Text Block]

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position at March 31, 2016 and December 31, 2015:  

	Unrealized Loss Position For Less Than 12 Months				Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
March 31, 2016
Municipal notes and bonds	$	57,835	$	20	$	—	$	—
Total	$	57,835	$	20	$	—	$	—
December 31, 2015
Municipal notes and bonds	$	52,638	$	15	$	305	$	1
Corporate bonds	835		3		—		—
Total	$	53,473	$	18	$	305	$	1

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Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities - (Tables)

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of March 31, 2016 and December 31, 2015 were as follows:

	March 31, 2016		December 31, 2015
Notional amount	$	4,525	$	5,423
Fair value of liability	$	289	$	85

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Identifiable Intangible Assets - (Tables)

3 Months Ended

Mar. 31, 2016

Identifiable Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]

Purchased intangible assets as of March 31, 2016 and December 31, 2015 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
March 31, 2016
Finite-lived intangibles:
Developed technology	$	65,527	$	55,592	$	9,935
Customer and distributor relationships	9,560		8,258		1,302
Trade names	4,361		3,600		761
Total identifiable intangible assets	$	79,448	$	67,450	$	11,998
December 31, 2015
Finite-lived intangibles:
Developed technology	$	65,527	$	55,110	$	10,417
Customer and distributor relationships	9,560		8,170		1,390
Trade names	4,361		3,575		786
Total identifiable intangible assets	$	79,448	$	66,855	$	12,593

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Balance Sheet Details - (Tables)

3 Months Ended

Mar. 31, 2016

Balance Sheet Detail [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories are comprised of the following:

	March 31, 2016		December 31, 2015
Materials	$	39,345	$	39,022
Work-in-process	23,161		18,918
Finished goods	11,637		13,550
Total inventories	$	74,143	$	71,490

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

Prepaid expenses and other current assets

Prepaid expenses and other current assets are comprised of the following:

	March 31, 2016		December 31, 2015
Patent litigation judgment	$	14,632	$	—
Other	6,887		8,137
Total prepaid expenses and other current assets	$	21,519	$	8,137

Property, Plant and Equipment [Table Text Block]

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

	March 31, 2016		December 31, 2015
Land and building	$	2,584	$	5,024
Machinery and equipment	23,952		21,683
Furniture and fixtures	2,671		3,414
Computer equipment	5,595		5,304
Leasehold improvements	8,089		7,884
	42,891		43,309
Less: Accumulated depreciation	28,941		30,963
Total property, plant and equipment, net	$	13,950	$	12,346

Schedule of Other Assets [Table Text Block]

Other assets is comprised of the following:

	March 31, 2016		December 31, 2015
Deferred income taxes	$	35,047	$	34,973
Other	569		559
Total other assets	$	35,616	$	35,532

Other Current liabilities [Table Text Block]

Other current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Litigation accrual	$	3,252	$	3,252
Contingent consideration - acquisitions	717		1,407
Other	6,658		7,756
Total other current liabilities	$	10,627	$	12,415

Other Non-current liabilities [Table Text Block]

Other non-current liabilities is comprised of the following:

	March 31, 2016		December 31, 2015
Unrecognized tax benefits (including interest)	$	2,963	$	3,152
Contingent consideration - acquisitions	3,103		2,296
Deferred revenue	1,128		1,206
Other	3,075		2,900
Total other non-current liabilities	$	10,269	$	9,554

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Debt Obligations - (Tables)

3 Months Ended

Mar. 31, 2016

Debt Obligations [Abstract]

Schedule of carrying value of convertible senior notes [Table Text Block]

The following table reflects the net carrying value of the Notes:

	March 31, 2016		December 31, 2015
Convertible senior notes	$	60,000	$	60,000
Less: Unamortized interest discount	999		1,893
Less: Unamortized debt issuance costs	138		261
Net carrying value of convertible senior notes	$	58,863	$	57,846

Schedule of interest cost recognized on convertible senior notes [Table Text Block]

The following table presents the amount of interest cost recognized relating to the Notes during the three months endedMarch 31, 2016 and March 31, 2015:

	Three Months Ended March 31,
	2016		2015
Contractual interest coupon	$	562	$	562
Amortization of interest discount	894		811
Amortization of debt issuance costs	123		103
Total interest cost recognized	$	1,579	$	1,476

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Commitments and Contingencies - (Tables)

3 Months Ended

Mar. 31, 2016

Commitments and Contingencies [Abstract]

Schedule of changes product warranty liability [Table Text Block]

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

	Three Months Ended March 31,
	2016		2015
Balance, beginning of the period	$	1,894	$	1,574
Accruals	544		822
Less: Usage	665		696
Balance, end of the period	$	1,773	$	1,700

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Share-Based Compensation - (Tables)

3 Months Ended

Mar. 31, 2016

Share-based Compensation [Abstract]

Summary of restricted stock unit activity [Table Text Block]

A summary of the Company’s nonvested restricted stock unit activity with respect to the three months ended March 31, 2016 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015	1,169	$	11.40
Granted	162	$	12.31
Less: Vested	268	$	10.51
Less: Forfeited	7	$	11.16
Nonvested at March 31, 2016	1,056	$	11.76

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Other Income - (Tables)

3 Months Ended

Mar. 31, 2016

Other Income (Expense) [Abstract]

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

	Three Months Ended
	March 31,
	2016		2015
Foreign currency exchange losses, net	$	107	$	638
Total other expense	$	107	$	638

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Income Taxes - (Tables)

3 Months Ended

Mar. 31, 2016

Income Taxes [Abstract]

Schedule of effective tax rate [Table Text Block]

The following table provides details of income taxes:

	Three Months Ended
	March 31,
	2016			2015
Income before income taxes	$	19,561		$	3,097
Provision for income taxes	$	5,622		$	1,249
Effective tax rate	28.7		%	40.3		%

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Earnings Per Share - (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

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

	Three Months Ended March 31,
	2016		2015
Numerator:
Net income	$	13,939	$	1,848
Denominator:
Basic earnings per share - weighted average shares outstanding	30,957		31,928
Effect of potential dilutive securities:
Employee stock options and restricted stock units - dilutive shares	697		621
Diluted earnings per share - weighted average shares outstanding	31,654		32,549
Earnings per share:
Basic	$	0.45	$	0.06
Diluted	$	0.44	$	0.06

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Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2016

Accumulated Other Comprehensive Loss [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

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

	Foreign currency translation adjustments			Net unrealized losses on available-for-sale investments		Accumulated other comprehensive loss (income)
Beginning Balance, December 31, 2015	$	2,623		$	—	$	2,623
Net current period other comprehensive loss (income)	(638		)	6		(632		)
Reclassifications	—			—		—
Ending balance, March 31, 2016	$	1,985		$	6	$	1,991

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Segment Reporting and Geographic Information - (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting and Geographic Information [Abstract]

Schedule of revenue from external customers by Products and Services [Table Text Block]

The following table lists the different sources of revenue:

	Three Months Ended
	March 31,
	2016				2015
Systems and Software:
Process Control	$	36,459	67	%	$	36,061	69	%
Lithography	170		—	%	21		—	%
Software	7,422		14	%	7,794		15	%
Parts	7,160		13	%	5,655		10	%
Services	3,151		6	%	3,039		6	%
Total revenue	$	54,362	100	%	$	52,570	100	%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

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

	Three Months Ended
	March 31,
	2016		2015
United States	$	7,388	$	17,648
Taiwan	22,035		13,329
Japan	2,937		1,314
China	8,825		6,088
South Korea	1,623		3,531
Singapore	7,047		1,738
Other Asia	871		39
Germany	697		7,055
Other Europe	2,939		1,828
Total revenue	$	54,362	$	52,570

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

The following customers each accounted for more than 10% of total revenues for the indicated periods.

	Three Months Ended
	March 31,
	2016		2015
Customer A	26.9	%	11.1	%
Customer B	4.3	%	10.2	%

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Share Repurchase Program - (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of common stock repurchased [Abstract]

share repurchase program [Table Text Block]

The following table summarizes the Company’s stock repurchases for the three month period ended March 31, 2016 and 2015, respectively:

	Three Months Ended
	March 31,
	2016		2015
Shares of common stock repurchased	370		570
Cost of stock repurchased		$4,700		$6,786
Average price paid per share		$12.70		$11.91

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Basis of Presentation (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Issuance Costs [Abstract]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 138	$ 261

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Fair Value Measurements - (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments, Owned, State and Municipal Government Obligations, at Fair Value	$ 109,217	$ 116,089
Financial Instruments, Owned, Corporate Equities, at Fair Value	838	835
Foreign Currency Contract, Asset, Fair Value Disclosure		85
Assets, Fair Value Disclosure	110,055	116,924
Foreign Currency Contracts, Liability, Fair Value Disclosure	289
Business Combination, Contingent Consideration, Liability	3,820	3,703
Liabilities, Fair Value Disclosure	$ 4,109	3,788
Fair Value Inputs Discount Rate 3	9.10%
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ 3,820	3,703
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	117
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	$ 0
Fair Value, Level 3 Transfers out, Description	0
Convertible Debt	$ 58,863	57,846
Long-term Debt, Fair Value	$ 60,240	$ 60,630
Fair Value Inputs Discount Rate 2	5.00%	5.00%
Long-term Debt, Contingent Payment of Principal or Interest	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments, Owned, State and Municipal Government Obligations, at Fair Value	$ 0	$ 0
Financial Instruments, Owned, Corporate Equities, at Fair Value	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Assets, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0
Business Combination, Contingent Consideration, Liability	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments, Owned, State and Municipal Government Obligations, at Fair Value	109,217	116,089
Financial Instruments, Owned, Corporate Equities, at Fair Value	838	835
Foreign Currency Contract, Asset, Fair Value Disclosure		85
Assets, Fair Value Disclosure	110,055	116,924
Foreign Currency Contracts, Liability, Fair Value Disclosure	289
Business Combination, Contingent Consideration, Liability	0	0
Liabilities, Fair Value Disclosure	289	85
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments, Owned, State and Municipal Government Obligations, at Fair Value	0	0
Financial Instruments, Owned, Corporate Equities, at Fair Value	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Assets, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0
Business Combination, Contingent Consideration, Liability	3,820	3,703
Liabilities, Fair Value Disclosure	$ 3,820	$ 3,703

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Marketable Securities - (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 110,061	$ 116,924
Available-for-sale Securities, Fair Value Disclosure	110,055	116,924
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	99,920	113,542
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	99,914	113,549
Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost Basis	10,141	3,382
Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value	10,141	3,375
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	0	0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	0	0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0	0
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	109,223	116,086
Available-for-sale Securities, Gross Unrealized Gains	14	18
Available-for-sale Securities, Gross Unrealized Losses	20	15
Available-for-sale Securities, Fair Value Disclosure	109,217	116,089
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	57,835	52,638
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	20	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	305
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	1
Corporate Bond Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	838	838
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	0	3
Available-for-sale Securities, Fair Value Disclosure	838	835
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		835
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		0
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	110,061	116,924
Available-for-sale Securities, Gross Unrealized Gains	14	18
Available-for-sale Securities, Gross Unrealized Losses	20	18
Available-for-sale Securities, Fair Value Disclosure	110,055	116,924
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	57,835	53,473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	20	18
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	305
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	$ 0	$ 1

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Derivative Instruments and Hedging Activities - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 204	$ 78
Derivative, Notional Amount	4,525		$ 5,423
Derivative Asset, Fair Value, Gross Liability	$ 289
Derivative Asset, Fair Value, Gross Asset			$ 85

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Identifiable Intangible Assets - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 79,448		$ 79,448
Finite-Lived Intangible Assets, Accumulated Amortization	67,450		66,855
Intangible Assets, Net (Excluding Goodwill)	11,998		12,593
Amortization of Intangible Assets	595	$ 515
Future Amortization Expense, Remainder of Fiscal Year	1,726
Future Amortization Expense, Year One	1,933
Future Amortization Expense, Year Two	1,496
Future Amortization Expense, Year Three	1,496
Future Amortization Expense, Year Four	1,294
Future Amortization Expense, Year Five	546
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	65,527		65,527
Finite-Lived Intangible Assets, Accumulated Amortization	55,592		55,110
Intangible Assets, Net (Excluding Goodwill)	9,935		10,417
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,560		9,560
Finite-Lived Intangible Assets, Accumulated Amortization	8,258		8,170
Intangible Assets, Net (Excluding Goodwill)	1,302		1,390
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,361		4,361
Finite-Lived Intangible Assets, Accumulated Amortization	3,600		3,575
Intangible Assets, Net (Excluding Goodwill)	$ 761		$ 786

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Balance Sheet Details - Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Inventory Details [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 39,345	$ 39,022
Inventory, Work in Process, Net of Reserves	23,161	18,918
Inventory, Finished Goods, Net of Reserves	11,637	13,550
Inventory, Net	74,143	71,490
Inventory Valuation Reserves	$ 9,515	$ 8,896

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Balance Sheet Details - Property Plant & Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Buildings and Land Gross	$ 2,584	$ 5,024
Machinery and Equipment, Gross	23,952	21,683
Furniture and Fixtures, Gross	2,671	3,414
Computer Equipments And Software Gross	5,595	5,304
Leasehold Improvements, Gross	8,089	7,884
Property, Plant and Equipment, Gross	42,891	43,309
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	28,941	30,963
Property, Plant and Equipment, Net	13,950	$ 12,346
Land [Member]
Property, Plant and Equipment [Line Items]
Asset held-for-sale, Not Part of Disposal Group, Current, Other - Cost	168
Building [Member]
Property, Plant and Equipment [Line Items]
Asset held-for-sale, Not Part of Disposal Group, Current, Other - Cost	939
Asset Held for sale current, other NBV	$ 51

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Balance Sheet Details - Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	$ 35,047	$ 34,973
Other	569	559
Total Other Assets	$ 35,616	$ 35,532

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Balance Sheet Details - Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Current Liabilities [Abstract]
Estimated Litigation Liability, Current	$ 3,252	$ 3,252
Contingent Consideration Current Liability	717	1,407
Other Current Liabilities Subtotal	6,658	7,756
Other Liabilities, Current	$ 10,627	$ 12,415

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Balance Sheet Details - Other Non-Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Non-current Liabilities [Abstract]
Unrecognized Tax Benefits	$ 2,963	$ 3,152
Contingent consideration - Acquisition non-current liability	3,103	2,296
Deferred Revenue, Noncurrent	1,128	1,206
Other Liabilities	3,075	2,900
Other Liabilities, Noncurrent	$ 10,269	$ 9,554

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Balance Sheet Details Balance Sheet Detail - Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Issuance Costs [Abstract]
Loss Contingency, damages Awarded, Value 2	$ 14,632	$ 0
Other Assets, Current	6,887	8,137
Prepaid Expense and Other Assets	$ 21,519	$ 8,137

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Debt Obligations - (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2011	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Jul. 25, 2011
Debt Obligations [Abstract]
Convertible Debt		$ 60,000		$ 60,000	$ 60,000
Debt Instrument, Interest Rate, Stated Percentage					3.75%
Convertible Preferred Stock, Shares Issued upon Conversion					77.241
Note increment for which conversion amount of Common Stock based					$ 1
Debt Instrument, Convertible, Conversion Price					$ 12.95
Class of Warrant or Right, Exercise Price of Warrants or Rights					$ 17.00
Proceeds from Convertible Debt	$ 50,249
Debt Instrument, Unamortized Discount		999		1,893
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net		138		261
Convertible Debt, Current		58,863		57,846
Convertible senior notes				$ 57,846
Contractual Interest Coupon		562	$ 562
Amortization of Debt Discount (Premium)		894	811
Amortization of Financing Costs		123	103
Interest Expense, Debt		$ 1,579	$ 1,476

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Commitments and Contingencies - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Line of Credit, Current	$ 60,000
Standard Product Warranty Accrual	1,773	$ 1,700	$ 1,894	$ 1,574
Product Warranty Accrual, Warranties Issued	544	822
Product Warranty Accrual, Payments	$ 665	$ 696

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Legal Matters (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Aug. 08, 2014
Commitments and Contingencies [Abstract]
Estimated Litigation Liability		$ 3,252
Subsequent Event [Line Items]
Loss Contingency, Damages Awarded, Value	$ 14,512

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Commitments and Contingencies Legal Matters - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Damages Awarded, Value	$ 14,512
Loss Contingency, damages Awarded, Value 2	$ 14,632	$ 0

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Share-Based Compensation Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Restricted Stock Units Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,056	1,169
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 11.76	$ 11.40
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	162
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 12.31
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	268
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 10.51
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	7
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 11.16
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 8,930	$ 8,221
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years 11 months 25 days	2 years 7 months 20 days

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Other Income - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Income (Expense) [Abstract]
Foreign currency exchange losses (gains), net	$ 107	$ 638
Total other expenses (income)	$ 107	$ 638

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Income Taxes - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Taxes [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 19,561	$ 3,097
Income Tax Expense (Benefit)	$ 5,622	$ 1,249
Effective Income Tax Rate	28.70%	40.30%
Valuation Allowance, Amount	$ 2,205		$ 2,205

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Earnings Per Share - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Stock Options Antidilutive securities excluded from computation	151
Restricted Stock Unit Antidilutive excluded from computation	0
Stock Options Excluded from Computation of diluted loss per share		299
Restricted stock units excluded from Computation of diluted loss per share		0
Net Income (Loss) Attributable to Parent	$ 13,939	$ 1,848
Weighted Average Number of Shares Outstanding, Basic	30,957	31,928
Weighted Average Number Diluted Shares Outstanding Adjustment	697	621
Weighted Average Number of Shares Outstanding, Diluted	31,654	32,549
Earnings (Loss) Per Share, Basic	$ 0.45	$ 0.06
Earnings (Loss) Per Share, Diluted	$ 0.44	$ 0.06

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Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Stockholders' Equity Attributable to Parent	$ 280,511	$ 270,678
Accumulated Translation Adjustment [Member]
Stockholders' Equity Attributable to Parent	1,985	2,623
Net current period other comprehensive gain (loss)	(638)
Reclassification of accumulated other comprehensive income (loss)	0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Stockholders' Equity Attributable to Parent	6	0
Net current period other comprehensive gain (loss)	6
Reclassification of accumulated other comprehensive income (loss)	0
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity Attributable to Parent	1,991	$ 2,623
Net current period other comprehensive gain (loss)	(632)
Reclassification of accumulated other comprehensive income (loss)	$ 0

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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 54,362	$ 52,570
Concentration Risk, Percentage	26.90%	11.10%
Process Control Revenue [Member]
Segment Reporting Information [Line Items]
Revenues	$ 36,459	$ 36,061
Lithography Revenue [Domain]
Segment Reporting Information [Line Items]
Revenues	170	21
Software [Domain]
Segment Reporting Information [Line Items]
Revenues	7,422	7,794
Sales Revenue, Goods, Net [Member]
Segment Reporting Information [Line Items]
Revenues	7,160	5,655
Sales Revenue, Services, Net [Member]
Segment Reporting Information [Line Items]
Revenues	3,151	3,039
Sales Revenue, Segment [Member]
Segment Reporting Information [Line Items]
Revenues	$ 54,362	$ 52,570
Sales [Member] | Percentage of Process Control Revenue [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	67.00%	69.00%
Sales [Member] | Percentage of Lithography Revenue [Member] [Domain]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	0.00%	0.00%
Sales [Member] | Percentage of Software Revenue [Domain]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	14.00%	15.00%
Sales [Member] | Percentage of Parts [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	13.00%	10.00%
Sales [Member] | Percentage of Service [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	6.00%	6.00%
Sales [Member] | Percentage of Total Revenue [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	100.00%	100.00%
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	$ 7,388	$ 17,648
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Revenues	22,035	13,329
JAPAN
Segment Reporting Information [Line Items]
Revenues	2,937	1,314
CHINA
Segment Reporting Information [Line Items]
Revenues	8,825	6,088
South Korea [Domain]
Segment Reporting Information [Line Items]
Revenues	1,623	3,531
SINGAPORE
Segment Reporting Information [Line Items]
Revenues	7,047	1,738
Asia [Member]
Segment Reporting Information [Line Items]
Revenues	871	39
GERMANY
Segment Reporting Information [Line Items]
Revenues	697	7,055
Other Europe [Domain]
Segment Reporting Information [Line Items]
Revenues	2,939	1,828
Sales [Member]
Segment Reporting Information [Line Items]
Revenues	$ 54,362	$ 52,570

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Segment Reporting and Geographic Information Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 54,362	$ 52,570
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	7,388	17,648
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Revenues	22,035	13,329
JAPAN
Segment Reporting Information [Line Items]
Revenues	2,937	1,314
CHINA
Segment Reporting Information [Line Items]
Revenues	8,825	6,088
South Korea [Domain]
Segment Reporting Information [Line Items]
Revenues	1,623	3,531
Asia [Member]
Segment Reporting Information [Line Items]
Revenues	871	39
GERMANY
Segment Reporting Information [Line Items]
Revenues	697	7,055
Other Europe [Domain]
Segment Reporting Information [Line Items]
Revenues	2,939	1,828
Sales [Member]
Segment Reporting Information [Line Items]
Revenues	$ 54,362	$ 52,570

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Segment Reporting and Geographic Information Customer Reporting (Details)	3 Months Ended
	Mar. 31, 2016 Rate	Mar. 31, 2015 Rate
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	26.90%	11.10%
Major Customer Two [Domain]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	4.30%	10.20%

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Share Repurchase Program - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share Repurchase Program [Abstract]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	3,000
Stock Repurchased and Retired During Period, Shares	370	570
Shares available for future repurchase	956
Stock Repurchased During Period, Value	$ 4,700	$ 6,786
StockRepurchasedAndRetired-AveragePricePerShare	$ 12.70	$ 11.91