Cascade Microtech (CSCD) 10-K 12 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 02, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	CSCD
Entity Registrant Name	CASCADE MICROTECH INC
Entity Central Index Key	864559
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		16,549,594
Entity Public Float			$197,039,129

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current Assets:
Cash and cash equivalents	$38,107	$17,172
Short-term marketable securities	1,626	4,278
Restricted cash	61	1,082
Accounts receivable, net of allowances of $208 and $269	20,763	26,520
Inventories	24,642	24,884
Prepaid expenses and other	4,454	2,147
Deferred income taxes	3,027	2,268
Total Current Assets	92,680	78,351
Fixed assets, net of accumulated depreciation of $28,407 and $27,730	8,100	6,403
Goodwill	12,823	14,471
Purchased intangible assets, net of accumulated amortization of $5,324 and $5,228	12,572	16,937
Deferred income taxes	1,262	1,235
Other assets	944	1,114
Total Assets	128,381	118,511
Current Liabilities:
Accounts payable	7,505	7,229
Deferred revenue	2,070	2,555
Accrued liabilities	9,505	8,859
Total Current Liabilities	19,080	18,643
Deferred revenue	329	548
Other long-term liabilities	1,511	2,119
Total Liabilities	20,920	21,310
Shareholders' Equity:
Common stock, $0.01 par value. Authorized 100,000 shares; issued and outstanding: 16,466 and 16,218	165	162
Additional paid-in capital	111,480	107,908
Accumulated other comprehensive income (loss)	-3,127	118
Accumulated deficit	-1,057	-10,987
Total Shareholders' Equity	107,461	97,201
Total Liabilities and Shareholders' Equity	$128,381	$118,511

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$208	$269
Fixed assets, accumulated depreciation	28,407	27,730
Purchased intangible assets, accumulated amortization	$5,324	$5,228
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	16,466	16,218
Common stock, shares outstanding	16,466	16,218

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$136,022	$120,010	$112,963
Cost of sales	65,708	65,286	63,012
Gross profit	70,314	54,724	49,951
Operating expenses:
Research and development	13,821	10,961	11,017
Selling, general and administrative	43,209	36,430	31,377
Total operating expenses	57,030	47,391	42,394
Income from operations	13,284	7,333	7,557
Other income (expense):
Interest income, net	29	44	52
Other, net	-649	-296	-801
Total other income (expense), net	-620	-252	-749
Income before income taxes	12,664	7,081	6,808
Income tax expense (benefit)	2,734	-6,337	709
Net income	$9,930	$13,418	$6,099
Basic net income per share	$0.61	$0.91	$0.43
Diluted net income per share	$0.59	$0.89	$0.42
Shares used in per share calculations:
Basic	16,323	14,792	14,182
Diluted	16,828	15,150	14,390

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$9,930	$13,418	$6,099
Other comprehensive income (loss):
Unrealized holding gains (losses), net of tax	-3	1	-11
Change in cumulative translation adjustment, net of tax	-3,242	833	347
Total other comprehensive income (loss), net of tax	-3,245	834	336
Comprehensive income	$6,685	$14,252	$6,435

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
In Thousands, except Share data
Beginning Balance at Dec. 31, 2011	$59,297	$142	$90,711	($1,052)	($30,504)
Beginning Balance (in shares) at Dec. 31, 2011		14,165,000
Common stock issued pursuant to stock plans (in shares)		307,000
Common stock issued pursuant to stock plans	398	3	395
Common stock repurchased, shares		-273,000
Common stock repurchased	-1,332	-3	-1,329
Value of vested restricted stock withheld for tax liability	-339		-339
Stock-based compensation	1,459		1,459
Foreign currency translation, net of tax	347			347
Unrealized holding gain (loss) on investments, net of tax	-11			-11
Net income	6,099				6,099
Ending Balance at Dec. 31, 2012	65,918	142	90,897	-716	-24,405
Ending Balance (in shares) at Dec. 31, 2012		14,199,000
Common stock issued pursuant to stock plans (in shares)		421,000
Common stock issued pursuant to stock plans	1,582	4	1,578
Common stock repurchased, shares		-10,000
Common stock repurchased	-58		-58
Common stock issued in connection with acquisition (in shares)		1,608,000
Common stock issued in connection with acquisition	14,524	16	14,508
Value of vested restricted stock withheld for tax liability	-476		-476
Stock-based compensation	1,614		1,614
Tax benefit (Reversal of tax benefit) related to stock-based awards	-155		-155
Foreign currency translation, net of tax	833			833
Unrealized holding gain (loss) on investments, net of tax	1			1
Net income	13,418				13,418
Ending Balance at Dec. 31, 2013	97,201	162	107,908	118	-10,987
Ending Balance (in shares) at Dec. 31, 2013		16,218,000
Common stock issued pursuant to stock plans (in shares)		363,000
Common stock issued pursuant to stock plans	2,101	4	2,097
Common stock repurchased, shares	-183,962	-115,000
Common stock repurchased	-1,070	-1	-1,069
Value of vested restricted stock withheld for tax liability	-699		-699
Stock-based compensation	2,482		2,482
Tax benefit (Reversal of tax benefit) related to stock-based awards	761		761
Foreign currency translation, net of tax	-3,242			-3,242
Unrealized holding gain (loss) on investments, net of tax	-3			-3
Net income	9,930				9,930
Ending Balance at Dec. 31, 2014	$107,461	$165	$111,480	($3,127)	($1,057)
Ending Balance (in shares) at Dec. 31, 2014		16,466,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$9,930	$13,418	$6,099
Adjustments to reconcile net income to net cash flows provided by operating activities, net of acquisitions:
Depreciation	3,335	3,661	3,547
Amortization	3,011	1,522	1,082
Stock-based compensation	2,482	1,614	1,459
Loss on write-down or disposal of long-lived assets	45	8	4
Deferred income taxes	-398	-7,176	-113
Excess tax benefits related to stock option exercises	-853
(Increase) decrease, net of effect of acquisitions, in:
Accounts receivable, net	5,371	-4,606	2,804
Inventories	-1,063	3,429	-1,493
Prepaid expenses and other	898	1,989	1,677
Increase (decrease), net of effect of acquisitions, in:
Accounts payable	44	657	-177
Deferred revenue	-704	-788	-1,867
Accrued and other long-term liabilities	2,105	-1,483	-2,434
Net cash provided by operating activities	24,203	12,245	10,588
Cash flows from investing activities:
Purchase of marketable securities	-2,947	-15,312	-9,145
Proceeds from sale of marketable securities	5,596	16,357	8,302
Decrease in restricted cash	952	33	425
Purchase of fixed assets	-4,856	-1,692	-1,767
Proceeds from sale of fixed assets and assets held for sale	34	16	25
Cash paid for acquisitions, net of cash acquired	-1,528	-13,253
Net cash used in investing activities	-2,749	-13,851	-2,160
Cash flows from financing activities:
Principal payments on capital lease obligations		-2	-16
Withholding taxes paid on net settlement of vested restricted stock units	-699	-476	-339
Excess tax benefits related to stock option exercises	853
Proceeds from issuances of common stock	2,101	1,582	398
Cash paid for repurchase of common stock	-1,070	-58	-1,332
Net cash provided by (used in) financing activities	1,185	1,046	-1,289
Effect of exchange rate changes on cash and cash equivalents	-1,704	-195	132
Increase (decrease) in cash and cash equivalents	20,935	-755	7,271
Cash and cash equivalents:
Beginning of year	17,172	17,927	10,656
End of year	38,107	17,172	17,927
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net	1,282	566	1,552
Supplemental disclosure of non-cash information:
Common stock issued in connection with acquisitions		14,524
Fair value of assets acquired from acquisitions, net of cash		35,209
Liabilities assumed from acquisitions		4,893
Payable for fixed assets	525
Transfer from (to) inventory to (from) fixed assets	($182)	($94)	$1,038

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Nature of Business
	We design, develop, manufacture and market advanced wafer probing, thermal and reliability solutions for the electrical measurement and testing of high performance semiconductor devices. Our products enable precision on-wafer measurement of integrated circuits and are typically used in the early phases of the development of semiconductor processes where the accuracy and repeatability of measurements is critical to achieving yield from advanced process nodes. They are also used in production applications to test semiconductor devices prior to completion of the manufacturing process. We design, manufacture and assemble our products in Beaverton, Oregon, North St. Paul, Minnesota, Munich, Germany, and Dresden, Germany and maintain global sales, service and support centers in North America, Germany, Japan, Taiwan, China and Singapore.
	Principles of Consolidation
	The consolidated financial statements include the accounts of Cascade Microtech, Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates in Financial Reporting
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as revenues and expenses reported for the periods presented. On an on-going basis, we evaluate our estimates, including those related to revenue recognition, allowance for doubtful accounts, valuation of excess and obsolete inventory, lives and recoverability of equipment and other long-lived assets, goodwill impairment, warranty liabilities, deferred tax asset valuation allowance, unrecognized tax benefits, stock-based compensation, lease abandonment costs, contingencies and litigation. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
	Cash and Cash Equivalents
	We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. Our cash balances with financial institutions may exceed the deposit insurance limits. Included in cash and cash equivalents were cash equivalents of $6.6 million and $4.0 million at December 31, 2014 and 2013, respectively, which consisted primarily of money market funds, and are stated at cost, which approximates market value.
	Marketable Securities
	We classify our marketable securities as available-for-sale and, accordingly, record them at fair value. Unrealized holding gains and losses are excluded from earnings and are reported as a separate component of Shareholders’ equity until realized. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities sold.
	We periodically evaluate whether declines in fair values of our investments below their cost are “other-than-temporary.” This evaluation consists of qualitative and quantitative factors regarding the severity and duration of the unrealized loss, as well as our ability and intent to hold the investment until a forecasted recovery occurs.
	Restricted Cash
	Our restricted cash is held in accounts with banks that have issued guarantees to our customers for advance deposits on goods and services. The guarantees allow the banks to withdraw the restricted cash from our accounts and return the advanced deposit to the customer if goods are not delivered or services are not properly performed. All of the guarantees expire within 12 months of the balance sheet date and, accordingly, are recorded as a current asset in our Consolidated Balance Sheets.
	Trade Accounts Receivable
	Trade accounts receivable are recorded at their invoiced amount and do not bear interest. The allowance for doubtful accounts is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine our allowance for doubtful accounts utilizing historical collection percentages considering the aging of the accounts and known trends with current customers, including recent significant changes in their financial position.
	Activity related to our allowance for doubtful accounts was as follows (in thousands):
	Balance, December 31, 2011		$	266
	Charges to costs and expenses			133
	Write-offs			(155	)
	Recoveries			101
	Balance, December 31, 2012			345
	Charges to costs and expenses			20
	Write-offs			(96	)
	Recoveries			—
	Balance, December 31, 2013			269
	Charges to costs and expenses			(50	)
	Write-offs			(14	)
	Recoveries			3
	Balance, December 31, 2014		$	208
	Inventories
	Inventories are stated at the lower of standard cost, which approximates cost computed on a first-in, first-out basis, or market, and include materials, labor and manufacturing overhead. Demonstration goods, which are included as a component of finished goods, represent inventory that is used for customer demonstration purposes. This inventory is typically sold after 12 to 18 months. We analyze the carrying value of our inventory quarterly, considering a combination of factors including, but not limited to, the following: forecasted sales or usage, historical usage rates, estimated service period, product end-of-life dates, estimated current and future market values, service inventory requirements and new product introductions. We estimate market value based on factors including, but not limited to, replacement cost and estimated resale value with declines in value below cost being recorded quarterly as a component of cost of sales, therefore establishing a new cost basis for the inventory.
	Inventory charges were as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Inventory charges		$	1,816		$	1,559		$	1,381
	Fixed Assets
	Equipment and leasehold improvements are stated at cost. Equipment under capital lease is recorded at the net present value of the future minimum lease payments at the inception of the lease. Maintenance and repairs are expensed as incurred. We do not accrue for the future cost of periodic major overhauls and planned maintenance of plant and equipment in annual or interim periods. Depreciation of owned equipment is provided using the straight-line method over the estimated useful lives of the assets, ranging from two to seven years. Amortization of equipment under capital leases and leasehold improvements is provided using the straight-line method over the life of the lease or the useful life of the asset, whichever is shorter. Fixed assets are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.” We did not capitalize any interest during 2014, 2013 or 2012.
	Goodwill
	Goodwill represents the excess of the aggregate purchase price over the fair value of the net assets acquired
	in a purchase business combination. Goodwill is not amortized but rather is reviewed for impairment at least annually, or more frequently if a triggering event occurs. We first make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. If the conclusion is that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we then perform a two-step goodwill impairment test. Under the first step, the fair value of the reporting unit is compared to its carrying value, and, if an indication of goodwill impairment exists in the reporting unit, the enterprise must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill as determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed.
	Goodwill at December 31, 2014 relates to the following:
		•		our January 2010 acquisition of SUSS MicroTec Test Systems GmbH (“SUSS Test”);
		•		our July 2013 acquisition of the Reliability Test Product (“RTP”) division of Aetrium Incorporated; and
		•		our October 2013 acquisition of ATT Advanced Temperature Test Systems GmbH (“ATT Systems”).
	This goodwill relates to our Systems segment and represents the value of assembled workforce and other intangible assets that do not qualify for separate recognition. Our assessments performed in the fourth quarters of 2014, 2013 and 2012 did not indicate any impairment of goodwill.
	Purchased Intangible Assets
	Purchased intangible assets include various intangible assets acquired through business acquisitions. These assets are amortized using the straight-line method over their estimated useful lives of one to twelve years. Purchased intangible assets are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.”
	Other Assets
	Other long-term assets at December 31, 2014 and 2013 included $0.1 million and $0.3 million, respectively, of internally developed patents, net. These assets are amortized using the straight-line method over estimated useful lives of one to eight years and have no significant residual value. Patent amortization is included as a component of Selling, general and administrative expense. Patents are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.”
	Accounting for the Impairment of Long-Lived Assets
	Long-lived assets held and used by us, including fixed assets, patents and intangible assets with determinable lives, are reviewed for impairment whenever events or circumstances indicate that the carrying amount of assets may not be recoverable. We evaluate recoverability of assets to be held and used by comparing the carrying amount of an asset to future net undiscounted cash flows to be generated by the asset. If such assets are considered not to be recoverable, an impairment charge is recognized for the amount by which the carrying value of the assets exceeds the fair value of the assets. Such reviews assess the fair value of the assets based upon estimates of discounted future cash flows that the assets are expected to generate.
	We did not record any impairment charges related to long-lived assets during 2014, 2013 or 2012.
	Revenue Recognition
	Revenue from product sales to customers and distributors that do not have special acceptance criteria is recognized when a written purchase order has been obtained, the price is fixed and determinable, the product is shipped, title has transferred and collectability is reasonably assured. Generally, we ship our products with origin terms. For any shipments with destination terms, we defer revenue until delivery to the customer. Revenue from customers who have special acceptance criteria beyond our standard terms and conditions is not recognized until all acceptance criteria are satisfied. Revenue for installation services, consisting of assembly and testing, is recognized when the services are performed.
	We sell our products to end-users through a combination of manufacturers’ representatives, distributors and direct sales people:
		•		manufacturers’ representatives are independent companies that agree to sell our products at our prices and on our terms and they are paid a commission based on a percentage of their sales of our products;
		•		distributors purchase our products directly from us and pay us directly according to our standard terms and conditions; they then resell the products to end users at prices and terms set by them; and
		•		the direct sales force consists of our salaried and commissioned employees.
	Our transactions may involve the sale of systems and services under multiple element arrangements. Revenue under multiple element arrangements is allocated based on the fair value of each element. A typical multiple element arrangement may include some or all of the following components: products, accessories, installation services and extended warranty contracts. The total sales price is allocated based on the relative fair value of each component. We record deferred revenue for service contracts and customer deposits. Deferred revenue related to service contracts and extended warranties is recognized over the life of the contract based on the stated contractual price, typically one to two years.
	Taxes Collected from Customers and Remitted to Governmental Authorities
	We account for tax assessed by a governmental authority that is directly imposed on a revenue-producing transaction (i.e., sales, use, value added) on a net (excluded from revenue) basis.
	Shipping and Handling Costs
	Shipping and handling costs are included as a component of Cost of sales.
Significant Customers
No customer in 2014, 2013 or 2012 accounted for 10% or more of our total revenues. At December 31, 2014 and 2013, no customers represented 10% or more of our gross accounts receivable balance.
Product Warranty
We estimate a liability for costs to repair or replace products under warranty for periods ranging from 90 days to one year when the related product revenue is recognized. The liability for product warranties is calculated as a percentage of sales. The percentage is based on historical product repair costs. The liability for product warranties is included in Accrued liabilities. Product warranty activity was as follows (in thousands):
Warranty accrual, December 31, 2011		$	729
Reductions for warranty charges			(888	)
Additions to warranty reserve			875
Warranty accrual, December 31, 2012			716
Reductions for warranty charges			(798	)
Additions to warranty reserve			827
Warranty accrual, December 31, 2013			745
Reductions for warranty charges			(812	)
Additions to warranty reserve			864
Warranty accrual, December 31, 2014		$	797
Additions to the warranty reserve in 2013 include accrued warranty costs of $0.2 million assumed with the acquisitions in 2013 as discussed in Note 3.
Advertising
Advertising costs, which are included as a component of Selling, general and administrative expense, are expensed as incurred and have been insignificant.
Research and Development
Research and development costs are expensed as incurred.
Legal Costs
We may be a party to legal proceedings arising in the normal course of business. We accrue for certain legal costs, including attorney fees, and potential settlement claims related to various legal proceedings that are estimable and probable. If not estimable and probable, legal costs are expensed as incurred. Legal costs related to patents are included in Research and development expense. All other legal costs are included in Selling, general and administrative expense.
Forward Exchange Contracts
We enter into forward foreign currency exchange contracts, which typically expire within six months, to manage our exposure against foreign currency fluctuations in either the euro or Japanese yen. These foreign exchange contracts are not considered hedges and, as such, are recorded at fair value on the balance sheet with any changes in fair value included as Other income (expense), net in our Consolidated Statements of Operations. At December 31, 2014 and 2013, we had $25.3 million and $27.1 million, respectively, of forward exchange contracts outstanding. The unrealized gain (loss) on contracts outstanding was as follows (in thousands):
		December 31,
		2014			2013
Unrealized gain (loss)		$	1,020		$	(437	)
Income Taxes
Deferred income taxes are established for the difference between the financial reporting and income tax basis of assets and liabilities as well as operating loss and tax credit carryforwards. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that all or some portion of the deferred tax assets will not be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date.
We recognize the benefits of tax return positions if we determine that the positions are “more-likely-than-not” to be sustained by the taxing authority. Interest and penalties accrued on unrecognized tax benefits are recorded as tax expense in the period incurred. We are subject to income taxes within the U.S. and foreign jurisdictions, and, in the ordinary course of business, there are transactions and calculations where the ultimate tax determination is uncertain. We report a liability (or contra asset) for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in a tax return.
Net Income Per Share
Basic net income per share is computed by dividing the net income attributed to common shareholders for the period by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share incorporates the incremental shares issuable upon the assumed exercise of stock options and vesting of restricted stock units using the treasury stock method, if dilutive.
The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):
		Year Ended December 31,
		2014			2013			2012
Shares used to calculate basic net income per share			16,323			14,792			14,182
Dilutive effect of outstanding options and restricted stock units (“RSUs”)			505			358			208
Shares used to calculate diluted net income per share			16,828			15,150			14,390
Securities not considered as they would have been antidilutive			793			1,094			1,271
Stock-Based Compensation
We calculate stock-based compensation expense utilizing fair value-based methodologies and recognize the expense on a straight-line basis over the vesting period of such awards. The fair value of stock option awards is based on the Black-Scholes option pricing model, and the fair value of restricted stock units and stock awards is based on the fair value of our common stock on the date of grant. Compensation expense recorded for awards that do not vest is reversed in the period that it is determined that the award will not vest.
Certain Risks and Uncertainties
Our future operating results and financial condition are subject to influences driven by rapid technological changes, a highly competitive industry, a lengthy sales cycle, and the cyclical nature of general economic conditions. Future operating results will depend on many factors, including demand for our products, the introduction and industry acceptance of new products and the level and timing of available shippable orders and backlog.
In addition, we rely on several suppliers to provide certain key components used in our products. Some of these items are available from only one supplier or a limited group of suppliers. Any disruption in the availability and delivery of these items could adversely affect our revenues and results of operations.
Segment Reporting
We operate in two business segments: Systems and Probes. Sales of our probe stations, reliability test systems and thermal subsystems are included in the Systems segment. Sales of our analytical probes and production probe cards are included in the Probes segment.
Foreign Currency Translation
The local currency is the functional currency for each of our foreign subsidiaries. Assets and liabilities are translated into U.S. dollars at current exchange rates, and sales and expenses are translated using average rates. Gains and losses from translation of assets and liabilities are included in Accumulated other comprehensive income (loss) in our Consolidated Balance Sheets.

Recent_Accounting_Guidance

Recent Accounting Guidance	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Guidance	NOTE 2.	RECENT ACCOUNTING GUIDANCE
	ASU 2014-17
	In November 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-17, “Business Combinations (Topic 805).” ASU 2014-17 addresses whether an acquired entity can reflect the acquirer’s accounting and reporting basis (pushdown accounting) in its separate financial statements. ASU 2014-17 became effective November 18, 2014. The adoption of ASU 2014-17 did not have any effect on our financial position, results of operations or cash flows.
	ASU 2014-16
	In November 2014, the FASB issued ASU 2014-16, “Derivatives and Hedging (Topic 815).” ASU 2014-16 addresses whether the host contract in a hybrid financial instrument issued in the form of a share should be accounted for as debt or equity. ASU 2014-16 is effective for annual periods and interim periods beginning after December 15, 2015. We do not currently have issued, nor are we investors in, hybrid financial instruments. Accordingly, we do not expect the adoption of ASU 2014-16 to have any effect on our financial position, results of operations or cash flows.
	ASU 2014-12
	In June 2014, the FASB issued ASU 2014-12, “Compensation – Stock Compensation (Topic 718).” ASU 2014-12 addresses accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. ASU 2014-12 indicates that, in such situations, the performance target should be treated as a performance condition and, accordingly, the performance target should not be reflected in estimating the grant-date fair value of the award. Instead, compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. ASU 2014-12 is effective for annual periods and interim periods beginning after December 15, 2015. We do not expect the adoption of ASU 2014-12 to have a material effect on our financial position, results of operations or cash flows.
	ASU 2014-09
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and the International Accounting Standards Board. ASU 2014-09 is effective for annual and interim periods beginning on or after December 15, 2016. Early adoption is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. We have not yet selected a transition method nor have we determined the effect of the standard on our ongoing financial reporting.
	ASU 2013-11
	In July 2013, the FASB issued ASU No. 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” ASU 2013-11 amends the guidance related to the presentation of unrecognized tax benefits and allows for the reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward whenever the NOL or tax credit carryforward would be available to reduce the additional taxable income or tax due if the tax position is disallowed. ASU 2013-11 is effective for annual and interim periods for fiscal years beginning after December 15, 2013, and early adoption is permitted. Since ASU 2013-11 relates only to the presentation of unrecognized tax benefits, our adoption of ASU 2013-11 in January 2014 did not have a material effect on our financial position, results of operations or cash flows.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	NOTE 3. ACQUISITIONS
	ATT Systems
	On October 1, 2013, we acquired all of the outstanding shares of Advanced Temperature Test Systems GmbH (“ATT Systems”) for consideration of 9.6 million euro, or approximately $13.0 million, and 1.6 million shares of our common stock valued at $14.5 million. Approximately 8.8 million euro were paid at closing, 0.4 million euro was paid on October 1, 2014 and 0.4 million euro are to be paid on October 1, 2015. In addition, in December 2013, a working capital adjustment totaling 0.2 million euro, or approximately $0.2 million, was made as an adjustment to increase the purchase price and was paid in January 2014.
	We believe the acquisition of ATT Systems (the “ATT Acquisition”) strategically positions the combined company for future system development and access to larger markets.
	The allocation of the purchase price for the ATT Acquisition was as follows (dollars in thousands):
	Assets:				Useful Life
	Cash	$	559			—
	Accounts receivable		408			—
	Inventory		2,585			—
	Prepaid expenses and other		1,393			—
	Fixed assets		137			3 years
	Goodwill		12,551			—
	Other intangible assets:
	Core technology		10,266			6 years
	Customer relationships		3,377			8 years
	Trademarks and tradenames		1,216			10 years
			14,859
			32,492
	Liabilities:
	Accounts payable		518			—
	Accrued liabilities		252			—
	Long-term deferred tax liability		4,061			6 -10 years
			4,831
	Net assets acquired	$	27,661
	The key factors attributable to the creation of goodwill by the ATT Acquisition are the assembled workforce and our assessment regarding the ability of the business to generate cash flows beyond the lives of the finite-lived intangible assets. None of the goodwill or purchased intangibles are expected to be deductible for income tax purposes. The weighted average amortization period as of the date of closing for all intangible assets acquired is 6.8 years.
	The long-term deferred tax liability relates to the difference between the fair value of the acquired net assets, excluding goodwill, and their respective carryover historical tax basis and will generally be amortized over the life of the acquired intangibles.
	Transaction costs of $0.7 million were expensed as incurred as a component of Selling, general and administrative expenses.
	ATT System’s results of operations have been included in our consolidated financial statements and Systems segment subsequent to the date of acquisition as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Revenue	$	12,936		$	3,778
	Operating income		2,749			448
	The unaudited pro forma results of operations, as if the ATT Acquisition had occurred on January 1, 2012 were as follows (in thousands):
		Year Ended December 31,
		2013			2012
	Pro forma revenue	$	127,618		$	118,508
	Pro forma net income		14,564			5,834
	Pro forma basic net income per share		0.9			0.37
	Pro forma diluted net income per share		0.88			0.36
	RTP
	On July 31, 2013, we acquired certain assets of RTP for $1.9 million in cash (the “RTP Acquisition”), and contingent consideration of $0.8 million, which was paid during 2014. The fair value of the contingent consideration was determined to be $1.3 million as of the acquisition date and, accordingly, $0.5 million was credited to Selling, general and administrative expenses during 2014 as the liability was settled.
	We believe the RTP Acquisition expands our product portfolio and served available market while leveraging our existing sales and service channel. The results of operations of the RTP Acquisition are included in our Systems segment.
	The allocation of the purchase price for the RTP Acquisition was as follows (dollars in thousands):
					Useful Life
	Current assets	$	1,198			—
	Fixed assets		17			2 years
	Goodwill		641			—
	Other intangible assets:
	Core technology		930			5 years
	Customer relationships		490			12 years
			1,420
	Current liabilities		(62	)		—
	Net assets acquired	$	3,214
	The key factor attributable to the creation of goodwill by the transaction is the assembled workforce. All of the goodwill and purchased intangibles are expected to be deductible for income tax purposes. The weighted average amortization period as of the date of closing for all intangible assets acquired is 7.4 years.
	Transaction costs of $0.2 million associated with the RTP Acquisition were expensed as incurred as a component of Selling, general and administrative expenses.
	RTP’s results of operations have been included in our consolidated financial statements and Systems segment subsequent to the date of acquisition as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Revenue	$	2,954		$	1,222
	Operating loss		595			40
	Pro forma results of operations have not been presented because the effect of the acquisition was not material to prior period financial statements.

Marketable_Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	NOTE 4.	MARKETABLE SECURITIES
	Certain information regarding our marketable securities was as follows (in thousands):
			December 31,
			2014		2013
	Fair value:
	Corporate obligations		$	1,620	$	4,277
	Corporate equities			6		1
			$	1,626	$	4,278
	Cost:
	Corporate obligations		$	1,620	$	4,276
	Corporate equities			6		1
			$	1,626	$	4,277
	Fair value by maturity:
	Within one year		$	1,620	$	4,277
	One to two years			—		—
	Corporate equities			6		1
			$	1,626	$	4,278
	Gross unrealized holding gains:
	Corporate obligations		$	—	$	1
	U.S. treasury and agency securities			—		—
			$	—	$	1
	Gross unrealized holding losses:
	Corporate obligations		$	—	$	—
	U.S. treasury and agency securities			—		—
			$	—	$	—
	Realized gains and losses on marketable securities were immaterial during 2014, 2013 and 2012.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 5. FAIR VALUE MEASUREMENTS
	Various inputs are used in determining the fair value of our financial assets and liabilities and are summarized into three broad categories:
		•		Level 1 – quoted prices in active markets for identical securities;
		•		Level 2 – other significant observable inputs, including quoted prices for similar securities, interest rates, credit risk, etc.; and
		•		Level 3 – significant unobservable inputs, including our own assumptions in determining fair value.
	The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.
	The disclosures related to our financial assets and (liabilities) that are reported at fair value on a recurring basis are as follows (in thousands):
			December 31, 2014					December 31, 2013
			Fair Value			Input Level		Fair Value			Input Level
	Marketable securities – corporate equities		$	6			Level 1	$	1			Level 1
	Marketable securities – corporate obligations		$	1,620			Level 2	$	4,277			Level 2
	Forward sale contracts for Japanese yen		$	2,510			Level 2	$	523			Level 2
	Forward purchase contract for euro		$	726			Level 2	$	2,061			Level 2
	Forward sale contract for euro		$	22,056			Level 2	$	24,561			Level 2
	Contingent consideration related to the RTP Acquisition		$	—			Level 3	$	(1,350	)		Level 3
	The fair value of our marketable securities is determined based on quoted market prices for similar or identical securities. The fair value of our forward contracts is based on quoted market prices for similar securities and is used for the purpose of determining any gain or loss on our foreign currency positions. We do not record the full value of the forward contracts in our Condensed Consolidated Balance Sheets. We record the net unrealized gain or loss in our Consolidated Statements of Operations and as a component of Other income (expense).
	The fair value of the contingent consideration related to the RTP Acquisition was determined based on the present value of probability weighted payments expected to be made under the terms of the agreement.
	The carrying values of Cash and cash equivalents, Restricted cash, Accounts receivable, Prepaid expenses and other, Accounts payable and Accrued liabilities approximate fair value due to their short maturities.
	No changes were made to our valuation techniques during 2014.
	The following table summarizes our Level 3 activity for our contingent consideration liability (in thousands):
			Level 3
	Balance at December 31, 2013		$	1,350
	Decrease in contingent consideration due to re-measurement			(522	)
	Payment of contingent consideration			(828	)
	Balance at December 31, 2014		$	—

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	NOTE 6. INVENTORIES
	Inventories consisted of the following (in thousands):
		December 31,
		2014		2013
	Raw materials	$	14,120	$	15,234
	Work-in-process		3,809		2,958
	Finished goods		6,713		6,692
		$	24,642	$	24,884

Fixed_Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Fixed Assets	NOTE 7. FIXED ASSETS
	Fixed assets consisted of the following (in thousands):
		December 31,
		2014			2013
	Equipment	$	25,749		$	25,673
	Leasehold improvements		9,220			8,253
	Construction in progress		1,538			207
			36,507			34,133
	Less accumulated depreciation		(28,407	)		(27,730	)
		$	8,100		$	6,403
	Depreciation expense was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Depreciation expense	$	3,335		$	3,661		$	3,547

Goodwill_and_Purchased_Intangi

Goodwill and Purchased Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Purchased Intangible Assets	NOTE 8. GOODWILL AND PURCHASED INTANGIBLE ASSETS
	Goodwill
	The change in goodwill was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance, beginning of period	$	14,471		$	990		$	971
	Acquisition of RTP		—			641			—
	Acquisition of ATT Systems		—			12,551			—
	Effect of exchange rate changes		(1,648	)		289			19
	Balance, end of period	$	12,823		$	14,471		$	990
	Intangible Assets
	Intangible assets, net included the following (in thousands):
		December 31,
		2014			2013
	Purchased Intangible Assets
	Customer relationships	$	4,323		$	7,198
	Core technology		12,481			13,728
	Trademarks and tradenames		1,092			1,239
			17,896			22,165
	Less accumulated amortization		(5,324	)		(5,228	)
		$	12,572		$	16,937
	Patents
	Patents	$	4,632		$	4,632
	Less accumulated amortization		(4,540	)		(4,349	)
		$	92		$	283
	Intangible asset amortization is a component of Selling, general and administrative expense and was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Intangible amortization	$	3,011		$	1,522		$	1,082
	The estimated amortization of intangible assets is as follows over the next five years and thereafter (in thousands):
	2015	$	2,632
	2016		2,340
	2017		2,321
	2018		2,244
	2019		1,751
	Thereafter		1,376
		$	12,664

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued Liabilities	NOTE 9. ACCRUED LIABILITIES
	Accrued liabilities consisted of the following (in thousands):
		December 31,
		2014		2013
	Accrued compensation and benefits	$	3,606	$	2,812
	Accrued sales taxes and VAT		276		470
	Accrued income taxes		1,628		492
	Accrued warranty		797		745
	Contingent consideration related to RTP acquisition		—		1,350
	Payable to seller related to ATT acquisition		456		746
	Accrued restructuring costs		1,959		1,163
	Other		783		1,081
		$	9,505	$	8,859

Line_of_Credit

Line of Credit	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Line of Credit	NOTE 10. LINE OF CREDIT
	In August 2013, we entered into a line of credit agreement with JPMorgan Chase Bank, N.A. for a maximum $10.0 million line of credit facility (the “LOC”), which may be limited by a borrowing base. The LOC expires August 31, 2015 and contains a $2.5 million sublimit for letters of credit. Interest is based primarily on the London Interbank Offered Rate (“LIBOR”). The LOC contains restrictive and financial covenants. At December 31, 2014, no amounts were outstanding under the LOC, no letters of credit were outstanding and $10.0 million was available for borrowing.

Tax_Provision

Tax Provision	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Tax Provision	NOTE 11. TAX PROVISION
	Domestic and foreign pre-tax income from continuing operations was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Domestic	$	8,076		$	5,619		$	4,933
	Foreign		4,588			1,462			1,875
		$	12,664		$	7,081		$	6,808
	The income tax expense (benefit) from continuing operations consisted of the following (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	1,086		$	(253	)	$	13
	State		184			(39	)		32
	Foreign		1,862			1,039			752
	Total current		3,132			747			797
	Deferred:
	Federal		133			(5,912	)		—
	State		46			(928	)		—
	Foreign		(577	)		(244	)		(88	)
	Total deferred		(398	)		(7,084	)		(88	)
	Income tax (benefit) expense	$	2,734		$	(6,337	)	$	709
	The income tax (benefit) provision varies from the amounts computed by applying the Federal statutory rate of 34% to income from continuing operations before income taxes as follows (in thousands):
	Year Ended December 31,	Year Ended December 31,
		2014			2013			2012
	Federal income tax provision computed at statutory rates	$	4,269		$	2,407		$	2,281
	Difference in foreign tax rate		(405	)		174			(141	)
	State income taxes, net of federal benefit		142			140			27
	Stock-based compensation		142			966			96
	Research and development tax credits		(33	)		(256	)		56
	Expiration of tax credits		236			167			200
	Foreign tax credits		(2,527	)		(47	)		(136	)
	Foreign dividend		1,281			—			—
	Change in valuation allowance		(158	)		(9,656	)		(1,877	)
	Unrecognized tax benefits		8			9			9
	Foreign earnings not permanently reinvested		—			(207	)		(58	)
	Domestic production deduction		(251	)		—			—
	Other		30			(34	)		252
	Provision for (benefit from) income taxes	$	2,734		$	(6,337	)	$	709
	Deferred Tax Assets and Liabilities
	Significant components of deferred income tax assets and liabilities were as follows (in thousands):
		December 31,
		2014			2013
	Current deferred tax assets:
	Reserves and allowances	$	273		$	420
	Inventory		1,037			1,019
	Accrued vacation and bonus		664			435
	Unrealized loss on forward contracts		856			132
	Other current deferred tax assets		197			262
	Gross current deferred tax assets		3,027			2,268
	Valuation allowance		—			—
	Net current deferred tax assets		3,027			2,268
	Non-current deferred tax assets:
	Reserves and allowances		182			174
	Federal and state net operating loss (“NOL”) carryforwards		21			573
	Federal and state tax credits		1,781			2,640
	Stock-based compensation		565			506
	Intangibles		1,278			1,225
	Other non-current deferred tax assets		637			768
	Gross non-current deferred tax assets		4,464			5,886
	Valuation allowance		—			(158	)
	Net non-current deferred tax assets		4,464			5,728
	Non-current deferred tax liabilities:
	Foreign earnings		—			(536	)
	Intangibles		(2,936	)		(3,843	)
Other non-current deferred tax liabilities		(266	)		(114	)
Total non-current deferred tax liabilities		(3,202	)		(4,493	)
Non-current deferred tax assets, net		1,262			1,235
Net total deferred tax assets	$	4,289		$	3,503
Deferred tax assets arise from the tax benefit of amounts expensed for financial reporting purposes but not yet realized for tax purposes and from unutilized tax credits and NOL carry forwards. We evaluate our deferred tax assets on a regular basis to determine if a valuation allowance is required. To the extent it is determined that it is more likely than not that we will not realize the benefit of our deferred tax assets, we record a valuation allowance against deferred tax assets.
The total valuation allowance was as follows (in thousands):
	December 31,
	2014			2013
Valuation allowance	$	—		$	158
The net decrease in the total valuation allowance was as follows (in thousands):
	Year Ended December 31,
	2014			2013			2012
Decrease in valuation allowance	$	(158	)	$	(9,656	)	$	(1,877	)
The decrease in valuation allowance in 2014 was primarily related to utilization and expiration of state tax credits. The decrease in valuation allowance in 2013 was primarily related to release of the valuation allowance against U.S. deferred tax assets as of December 31, 2013 as it is more likely than not that these deferred tax assets will be realized. The decrease in valuation allowance in 2012 was primarily related to utilization of NOL carryforwards.
We had tax NOL and credit carryforwards as of December 31, 2014 as follows:
	Amount			Expiration
				Date
Federal and state research and experimentation credit carryforwards	$	1.8 million			2014-2034
State NOL carryforwards		0.8 million			2016-2031
Unrecognized Tax Benefits
A reconciliation of unrecognized tax benefits was as follows (in thousands):
Balance, December 31, 2011	$	141
Increases due to tax positions taken during the current year		—
Increases due to tax positions taken during a prior year		9
Balance, December 31, 2012		150
Increases due to tax positions taken during the current year		9
Increases due to tax positions taken during a prior year		—
Balance, December 31, 2013		159
Increases due to tax positions taken during the current year		—
Decreases due to tax positions taken during a prior year		(5	)
Balance, December 31, 2014	$	154
All of the unrecognized tax benefits at December 31, 2014 would have an impact on the effective tax rate if recognized. Interest and penalties in 2014, 2013 and 2012 were insignificant. Interest and penalties accrued on unrecognized tax benefits as of December 31, 2014 and 2013 were also insignificant.
The tax years that remained open to examination in our major taxing jurisdictions as of December 31, 2014 were as follows:
Jurisdiction	Open Tax Years
U.S.		2011-2014
Japan		2008-2014
Germany		2010-2014
Non-Repatriated Foreign Earnings
During the fourth quarter of 2014, we repatriated all of the distributable earnings of our subsidiary in Japan through a cash dividend totaling $2.5 million. The dividend included previously permanently reinvested earnings of $0.9 million. We did not provide for U.S. income taxes on the remaining undistributed earnings of our foreign subsidiaries because they were considered permanently reinvested outside of the U.S. as of December 31, 2014. Upon repatriation, some of these earnings would generate foreign tax credits, which may reduce the U.S. tax liability associated with any future foreign dividend. At December 31, 2014, the cumulative amount of earnings upon which U.S. income taxes have not been provided is approximately $8.0 million. The determination of the amount of unrecognized deferred U.S. income tax liability and foreign tax credit, if any, is not practicable to calculate.

Other_Income_Expense_Net

Other Income (Expense), Net	12 Months Ended
	Dec. 31, 2014
Other Income and Expenses [Abstract]
Other Income (Expense), Net	NOTE 12. OTHER INCOME (EXPENSE), NET
	Other income (expense), net consisted of the following (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Interest income, net	$	29		$	44		$	52
	Foreign currency losses		(3,629	)		(311	)		(950	)
	Gains on foreign currency forward contracts		3,016			90			166
	Other		(36	)		(75	)		(17	)
		$	(620	)	$	(252	)	$	(749	)

StockBased_Compensation_and_St

Stock-Based Compensation and Stock-Based Plans	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation and Stock-Based Plans	NOTE 13. STOCK-BASED COMPENSATION AND STOCK-BASED PLANS
	Certain information regarding our stock-based compensation was as follows (in thousands, except per share amounts):
		Year Ended December 31,
		2014			2013		2012
	Weighted average grant-date per share fair value of stock options granted	$	5.58		$	5.35	$	2.56
	Total intrinsic value of stock options exercised		377			523		4
	Fair value of restricted shares vested		2,309			1,398		1,236
	Tax benefit realized from stock options exercised and restricted stock units (“RSUs”) released		954			729		436
	Tax benefit recognized in our Consolidated Statements of Operations related to stock-based compensation		750			537		25
	Our stock-based compensation was included in our Consolidated Statements of Operations as follows (in thousands):
		Year Ended December 31,
		2014			2013		2012
	Cost of sales	$	234		$	201	$	165
	Research and development		321			198		242
	Selling, general and administrative		1,927			1,215		1,052
		$	2,482		$	1,614	$	1,459
	To determine the fair value of stock-based awards granted, we used the Black-Scholes option pricing model and the following weighted-average assumptions:
		Year Ended December 31,
		2014		2013	2012
	Stock Option Plan
	Risk-free interest rate	1.80%		1.1% - 1.8%	0.8% - 1.2%
	Expected dividend yield	0.00%		0.00%	0.00%
	Expected term	6.25 years		6.25 years	6.5 years
	Expected volatility	61.20%		60.6% - 61.0%	58.2% - 59.4%
	Employee Stock Purchase Plan
	Risk-free interest rate	0.10%		0.80%	0.1% - 0.2%
	Expected dividend yield	0.00%		0.00%	0.00%
	Expected term	6 months		6 months	6 months
	Expected volatility	35.4% - 37.8%		24.5% - 31.5%	40.1% - 54.3%
	The risk-free rate used is based on the U.S. Treasury yield over the expected term of the options granted. Our option pricing model utilizes the simplified method to estimate the expected term. The expected volatility for options granted pursuant to our stock incentive plans and for our employee stock purchase plan is calculated based on our historic volatility. We have not paid dividends in the past and we do not expect to pay dividends in the future and, therefore, the expected dividend yield is 0%.
	We amortize stock-based compensation on a straight-line basis over the vesting period of the individual awards, which is the requisite service period, with estimated forfeitures considered. Shares to be issued upon the exercise of stock options will come from newly issued shares.
	Stock Incentive Plans
	Our stock incentive plans include our 2000 Stock Incentive Plan (the “2000 Plan”) and our 2010 Stock Incentive Plan (the “2010 Plan”) (together, the “Plans”) and provide for the granting of incentive stock options, nonqualified stock options and RSUs. Incentive stock options must be granted at an exercise price not less than 100% of the fair market value per share at the grant date. Nonqualified stock options granted or shares sold under the Plans cannot be granted or sold at a price less than 85% of the fair market value per share at the date of grant or sale. The contractual term of options granted under the Plans is ten years, and the right to exercise options granted generally vests 25% each year over four years. Grants of RSUs generally vest 25% each year over four years, or 50% each year over two years. Grants to outside Board members vest immediately upon grant. We have authorized a total of 3,000,000 shares of common stock for issuance under the 2000 Plan and 2,869,600 shares under the 2010 Plan.
	At December 31, 2014, a total of 994,202 shares were available for future grants, and we had 2,306,705 shares of our common stock reserved for future issuance under the Plans.
	Stock option activity for the year ended December 31, 2014 and other Plan information was as follows:
		Options			Weighted
		Outstanding			Average
					Exercise Price
	Outstanding at December 31, 2013		1,042,937		$	6.52
	Granted		90,000			9.61
	Exercised		(148,166	)		9.9
	Forfeited		(67,992	)		9.01
	Outstanding at December 31, 2014		916,779			6.1
	Certain information regarding options outstanding as of December 31, 2014 was as follows:
		Options			Options
		Outstanding			Exercisable
	Number		916,779			555,689
	Weighted-average exercise price	$	6.1		$	5.48
	Aggregate intrinsic value	$	7,803,203		$	5,071,011
	Weighted-average remaining contractual term (in years)		6.38			5.36
	RSU activity for the year ended December 31, 2014 was as follows:
		Restricted			Weighted
		Stock			Average
		Units			Grant Date
					Per Share
					Fair Value
	Outstanding at December 31, 2013		409,403		$	6.87
	Granted		226,400			10.47
	Vested		(205,739	)		7.04
	Forfeited		(34,340	)		6.98
	Outstanding at December 31, 2014		395,724			8.83
	As of December 31, 2014, total unrecognized stock-based compensation related to outstanding, but unvested stock options and RSUs was $4.0 million, which will be recognized over the weighted average remaining vesting period of 2.2 years.
	Employee Stock Purchase Plan
	Our 2013 Employee Share Purchase Plan (the “2013 ESPP”) was approved by shareholders in May 2013. The terms of our 2013 ESPP provide for the sale and issuance of up to 1.0 million shares of our common stock. The 2013 ESPP replaced our 2004 Employee Share Purchase Plan (the “2004 ESPP”) for the six-month option period beginning on November 1, 2013.
Any eligible employee may participate in the 2013 ESPP by completing a subscription agreement which allows participants to have between 2% and 15% of their compensation withheld to purchase shares of common stock at 85% of the fair market value of a share of common stock on the enrollment date or on the exercise date, whichever is lower. No more than $12,500 can be withheld to purchase shares of common stock in each offering period. The exercise date is the last trading day of each offering period and participating employees are automatically enrolled in the new offering period.
The following information relates to our 2013 ESPP activity during 2014:
Shares issued pursuant to the 2013 ESPP		70,533
Weighted average price of shares issued	$	9
Discount per share from the fair market value on the dates of purchase	$	1.71
Shares remaining available for purchase pursuant to the 2013 ESPP as of December 31, 2014		929,467

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 14. RELATED PARTY TRANSACTIONS
	Significant related party transactions are described below.
	FEI Company
	One of the members of our Board of Directors, Mr. Raymond A. Link, is the Executive Vice President and Chief Financial Officer of FEI Company (“FEI”).
	Information regarding our transactions with FEI is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment and services purchased from FEI	$	36	$	33	$	37
	Equipment sold to FEI		5		—		—
		December 31,
		2014		2013
	Due to FEI	$	10	$	8
	Due from FEI		—		—
	Raytheon, Inc.
	One of the members of our Board of Directors, Dr. William R. Spivey, is a member of the Board of Directors of Raytheon, Inc. (“Raytheon”).
	Information regarding our transactions with Raytheon is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment sold to Raytheon	$	176	$	607	$	267
		December 31,
		2014		2013
	Due from Raytheon	$	21	$	10
	Lam Research Corporation
	One of the members of our Board of Directors, Dr. William R. Spivey, is a member of the Board of Directors of Lam Research Corporation (“Lam”). Dr. Spivey formerly served on the Board of Novellus Systems Inc. (“Novellus”), which was acquired by Lam in June 2012.
	Information regarding our transactions with Lam is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment sold to Lam	$	388	$	—	$	21
		December 31,
		2014		2013
	Due from Lam	$	3	$	—

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2014
Postemployment Benefits [Abstract]
Employee Benefit Plan	NOTE 15. EMPLOYEE BENEFIT PLAN
	We sponsor a 401(k) savings plan that allows eligible employees to contribute a certain percentage of their salary. We match 50% of each eligible employees’ contributions, up to a maximum of 3% of the employees’ earnings. Our matching contributions for the savings plan were as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	401(k) matching contributions	$	534	$	412	$	362

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 16. COMMITMENTS AND CONTINGENCIES
	Leases and Subleases
	We lease automobiles, office space and manufacturing space under operating leases that expire at various dates through 2020. In addition to lease expense, we pay real property taxes, insurance and repair and maintenance expenses for our corporate office and manufacturing facilities. We recognize rent expense related to our operating leases based on a straight-line basis over the life of the lease, including any periods of free rent.
	Future minimum lease payments under non-cancelable operating leases with initial or remaining terms in excess of one year are as follows (in thousands):
	Year Ending December 31,
	2015	$	3,605
	2016		2,088
	2017		2,085
	2018		1,418
	2019		1,450
	Thereafter		597
	Total minimum lease payments	$	11,243
	Lease expense was as follows (in thousands).
		Year Ended December 31,
		2014		2013		2012
	Lease expense	$	2,630	$	2,656	$	2,575
	Legal Proceedings
	We are involved in various claims and legal actions arising in the ordinary course of business. In the opinion of management, the ultimate disposition of existing matters will not have a material adverse effect on our financial position, results of operations or liquidity.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring	NOTE 17. RESTRUCTURING
	Restructuring charges in 2014 related to the consolidation of certain manufacturing, research and development operations at our corporate headquarters in Beaverton, Oregon, as well as the reorganization of business operations and the sales channel in Europe. As of December 31, 2014, these restructuring and consolidation activities were substantially complete,
	Restructuring charges in 2013 were related to the integration and consolidation of manufacturing operations in 2011 which resulted in lease abandonment charges.
	Summary
	Restructuring charges were as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Termination and severance related	$	683	$	—	$	—
	Lease abandonment and termination		553		227		—
		$	1,236	$	227	$	—
	Restructuring costs were included in our Consolidated Statements of Operations as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Cost of sales	$	154	$	—	$	—
	Selling, general and administrative		1,082		227		—
		$	1,236	$	227	$	—
	The following tables summarize the charges, expenditures and write-offs and adjustments related to our restructuring accruals (in thousands):
	Year Ended December 31, 2014	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Termination and severance related	$	—	$	683	$	(375	)	$	—	$	308
	Lease abandonment		2,129		553		(1,031	)		—		1,651
		$	2,129	$	1,236	$	(1,406	)	$	—	$	1,959
	Year Ended December 31, 2013	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Lease abandonment	$	3,034	$	227	$	(1,132	)	$	—	$	2,129
	Year Ended December 31, 2012	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Termination and severance related	$	10	$	—	$	(10	)	$	—	$	—
	Lease abandonment		4,137		—		(1,103	)		—		3,034
		$	4,147	$	—	$	(1,113	)	$	—	$	3,034
	We expect all accrued restructuring costs will be paid by the end of 2015.

Segment_Reporting_and_Enterpri

Segment Reporting and Enterprise-Wide Disclosures	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting and Enterprise-Wide Disclosures	NOTE 18. SEGMENT REPORTING AND ENTERPRISE-WIDE DISCLOSURES
	The segment data below is presented in the same manner that management currently organizes the segments for assessing certain performance trends. Our Chief Operating Decision Maker monitors the revenue streams and the operating income of our Systems segment and our Probes segment. We do not track our assets on a segment level, and, accordingly, that information is not provided.
	Revenue and operating income information by segment was as follows (dollars in thousands):
	Year Ended December 31, 2014		Systems			Probes			Corporate			Total
									Unallocated
	Revenue		$	82,850		$	53,172		$	—		$	136,022
	Gross profit		$	37,775		$	32,539		$	—		$	70,314
	Gross margin			45.6	%		61.2	%		—			51.7	%
	Income (loss) from operations		$	7,553		$	20,768		$	(15,037	)	$	13,284
	Year Ended December 31, 2013
	Revenue		$	79,229		$	40,781		$	—		$	120,010
	Gross profit		$	33,177		$	21,547		$	—		$	54,724
	Gross margin			41.9	%		52.8	%		—			45.6	%
	Income (loss) from operations(1)		$	9,794		$	11,568		$	(14,029	)	$	7,333
	Year Ended December 31, 2012
	Revenue		$	74,368		$	38,595		$	—		$	112,963
	Gross profit		$	29,391		$	20,560		$	—		$	49,951
	Gross margin			39.5	%		53.3	%		—			44.2	%
	Income (loss) from operations(1)		$	9,651		$	10,158		$	(12,252	)	$	7,557
	-1	Amortization expense of $1.2 million and $0.7 million for the years ended December 31, 2013 and 2012, respectively, was reclassified from Corporate Unallocated to Systems to conform with the current year presentation.
	No customer accounted for 10% or more of our total revenue in 2014, 2013 or 2012.
	Our revenues by geographic area were as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	United States		$	39,855		$	37,662		$	33,445
	Asia Pacific			63,660			50,748			51,290
	Europe			30,076			28,334			25,718
	Other			2,431			3,266			2,510
			$	136,022		$	120,010		$	112,963
	Long-lived assets, exclusive of deferred income taxes, by geographic area were as follows (in thousands):
			December 31,
			2014			2013
	United States		$	9,334		$	8,660
	Asia Pacific			304			339
	Europe			24,801			29,926
			$	34,439		$	38,925

Stock_Repurchase_Plans

Stock Repurchase Plans	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stock Repurchase Plans	NOTE 19. STOCK REPURCHASE PLANS
	In February 2012, our Board of Directors authorized a stock repurchase program under which up to $1.0 million of our common stock could be repurchased from time to time in the open market or in privately negotiated transactions during the period through June 30, 2012. As of June 30, 2012, a total of 214,087 shares had been repurchased at a weighted-average price of $4.67 per share, for a total purchase price of $1.0 million. The program was terminated by its terms on June 30, 2012.
	In November 2012, our Board of Directors authorized a stock repurchase program under which up to $2.0 million of our common stock could be repurchased from time to time in the open market or in privately negotiated transactions. In May 2014, our Board of Directors authorized an increase to the stock repurchase program of an additional $2.0 million. Information regarding repurchases made pursuant to this program is as follows (dollars in thousands, except per share amounts):
	Period	Number		Weighted		Total		Amount
		of Shares		average		purchase		remaining
				per share		price		for
				purchase				repurchase
				price
	Fourth quarter of 2012		59,006	$	5.6	$	332	$	1,668
	First quarter of 2013		9,800		5.87		58		1,610
	First quarter of 2014		88,445		9.24		817		793
	Second quarter of 2014		22,811		9.45		216		2,577
	Fourth quarter of 2014		3,900		9.47		37		2,540
			183,962		7.94		1,460		2,540

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Nature of Business	Nature of Business
	We design, develop, manufacture and market advanced wafer probing, thermal and reliability solutions for the electrical measurement and testing of high performance semiconductor devices. Our products enable precision on-wafer measurement of integrated circuits and are typically used in the early phases of the development of semiconductor processes where the accuracy and repeatability of measurements is critical to achieving yield from advanced process nodes. They are also used in production applications to test semiconductor devices prior to completion of the manufacturing process. We design, manufacture and assemble our products in Beaverton, Oregon, North St. Paul, Minnesota, Munich, Germany, and Dresden, Germany and maintain global sales, service and support centers in North America, Germany, Japan, Taiwan, China and Singapore.
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of Cascade Microtech, Inc. and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates in Financial Reporting	Use of Estimates in Financial Reporting
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as revenues and expenses reported for the periods presented. On an on-going basis, we evaluate our estimates, including those related to revenue recognition, allowance for doubtful accounts, valuation of excess and obsolete inventory, lives and recoverability of equipment and other long-lived assets, goodwill impairment, warranty liabilities, deferred tax asset valuation allowance, unrecognized tax benefits, stock-based compensation, lease abandonment costs, contingencies and litigation. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Cash and Cash Equivalents	Cash and Cash Equivalents
	We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. Our cash balances with financial institutions may exceed the deposit insurance limits. Included in cash and cash equivalents were cash equivalents of $6.6 million and $4.0 million at December 31, 2014 and 2013, respectively, which consisted primarily of money market funds, and are stated at cost, which approximates market value.
Marketable Securities	Marketable Securities
	We classify our marketable securities as available-for-sale and, accordingly, record them at fair value. Unrealized holding gains and losses are excluded from earnings and are reported as a separate component of Shareholders’ equity until realized. Dividend and interest income is recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities sold.
	We periodically evaluate whether declines in fair values of our investments below their cost are “other-than-temporary.” This evaluation consists of qualitative and quantitative factors regarding the severity and duration of the unrealized loss, as well as our ability and intent to hold the investment until a forecasted recovery occurs.
Restricted Cash	Restricted Cash
	Our restricted cash is held in accounts with banks that have issued guarantees to our customers for advance deposits on goods and services. The guarantees allow the banks to withdraw the restricted cash from our accounts and return the advanced deposit to the customer if goods are not delivered or services are not properly performed. All of the guarantees expire within 12 months of the balance sheet date and, accordingly, are recorded as a current asset in our Consolidated Balance Sheets.
Trade Accounts Receivable	Trade Accounts Receivable
	Trade accounts receivable are recorded at their invoiced amount and do not bear interest. The allowance for doubtful accounts is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine our allowance for doubtful accounts utilizing historical collection percentages considering the aging of the accounts and known trends with current customers, including recent significant changes in their financial position.
	Activity related to our allowance for doubtful accounts was as follows (in thousands):
	Balance, December 31, 2011		$	266
	Charges to costs and expenses			133
	Write-offs			(155	)
	Recoveries			101
	Balance, December 31, 2012			345
	Charges to costs and expenses			20
	Write-offs			(96	)
	Recoveries			—
	Balance, December 31, 2013			269
	Charges to costs and expenses			(50	)
	Write-offs			(14	)
	Recoveries			3
	Balance, December 31, 2014		$	208
Inventories	Inventories
	Inventories are stated at the lower of standard cost, which approximates cost computed on a first-in, first-out basis, or market, and include materials, labor and manufacturing overhead. Demonstration goods, which are included as a component of finished goods, represent inventory that is used for customer demonstration purposes. This inventory is typically sold after 12 to 18 months. We analyze the carrying value of our inventory quarterly, considering a combination of factors including, but not limited to, the following: forecasted sales or usage, historical usage rates, estimated service period, product end-of-life dates, estimated current and future market values, service inventory requirements and new product introductions. We estimate market value based on factors including, but not limited to, replacement cost and estimated resale value with declines in value below cost being recorded quarterly as a component of cost of sales, therefore establishing a new cost basis for the inventory.
	Inventory charges were as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Inventory charges		$	1,816		$	1,559		$	1,381
Fixed Assets	Fixed Assets
	Equipment and leasehold improvements are stated at cost. Equipment under capital lease is recorded at the net present value of the future minimum lease payments at the inception of the lease. Maintenance and repairs are expensed as incurred. We do not accrue for the future cost of periodic major overhauls and planned maintenance of plant and equipment in annual or interim periods. Depreciation of owned equipment is provided using the straight-line method over the estimated useful lives of the assets, ranging from two to seven years. Amortization of equipment under capital leases and leasehold improvements is provided using the straight-line method over the life of the lease or the useful life of the asset, whichever is shorter. Fixed assets are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.” We did not capitalize any interest during 2014, 2013 or 2012.
Goodwill	Goodwill
	Goodwill represents the excess of the aggregate purchase price over the fair value of the net assets acquired
	in a purchase business combination. Goodwill is not amortized but rather is reviewed for impairment at least annually, or more frequently if a triggering event occurs. We first make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. If the conclusion is that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we then perform a two-step goodwill impairment test. Under the first step, the fair value of the reporting unit is compared to its carrying value, and, if an indication of goodwill impairment exists in the reporting unit, the enterprise must perform step two of the impairment test (measurement). Under step two, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill as determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed.
	Goodwill at December 31, 2014 relates to the following:
		•		our January 2010 acquisition of SUSS MicroTec Test Systems GmbH (“SUSS Test”);
		•		our July 2013 acquisition of the Reliability Test Product (“RTP”) division of Aetrium Incorporated; and
		•		our October 2013 acquisition of ATT Advanced Temperature Test Systems GmbH (“ATT Systems”).
	This goodwill relates to our Systems segment and represents the value of assembled workforce and other intangible assets that do not qualify for separate recognition. Our assessments performed in the fourth quarters of 2014, 2013 and 2012 did not indicate any impairment of goodwill.
Purchased Intangible Assets	Purchased Intangible Assets
	Purchased intangible assets include various intangible assets acquired through business acquisitions. These assets are amortized using the straight-line method over their estimated useful lives of one to twelve years. Purchased intangible assets are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.”
Other Assets	Other Assets
	Other long-term assets at December 31, 2014 and 2013 included $0.1 million and $0.3 million, respectively, of internally developed patents, net. These assets are amortized using the straight-line method over estimated useful lives of one to eight years and have no significant residual value. Patent amortization is included as a component of Selling, general and administrative expense. Patents are reviewed for impairment as discussed below under “Accounting for the Impairment of Long-Lived Assets.”
Accounting for the Impairment of Long-Lived Assets	Accounting for the Impairment of Long-Lived Assets
	Long-lived assets held and used by us, including fixed assets, patents and intangible assets with determinable lives, are reviewed for impairment whenever events or circumstances indicate that the carrying amount of assets may not be recoverable. We evaluate recoverability of assets to be held and used by comparing the carrying amount of an asset to future net undiscounted cash flows to be generated by the asset. If such assets are considered not to be recoverable, an impairment charge is recognized for the amount by which the carrying value of the assets exceeds the fair value of the assets. Such reviews assess the fair value of the assets based upon estimates of discounted future cash flows that the assets are expected to generate.
	We did not record any impairment charges related to long-lived assets during 2014, 2013 or 2012.
Revenue Recognition	Revenue Recognition
	Revenue from product sales to customers and distributors that do not have special acceptance criteria is recognized when a written purchase order has been obtained, the price is fixed and determinable, the product is shipped, title has transferred and collectability is reasonably assured. Generally, we ship our products with origin terms. For any shipments with destination terms, we defer revenue until delivery to the customer. Revenue from customers who have special acceptance criteria beyond our standard terms and conditions is not recognized until all acceptance criteria are satisfied. Revenue for installation services, consisting of assembly and testing, is recognized when the services are performed.
	We sell our products to end-users through a combination of manufacturers’ representatives, distributors and direct sales people:
		•		manufacturers’ representatives are independent companies that agree to sell our products at our prices and on our terms and they are paid a commission based on a percentage of their sales of our products;
		•		distributors purchase our products directly from us and pay us directly according to our standard terms and conditions; they then resell the products to end users at prices and terms set by them; and
		•		the direct sales force consists of our salaried and commissioned employees.
	Our transactions may involve the sale of systems and services under multiple element arrangements. Revenue under multiple element arrangements is allocated based on the fair value of each element. A typical multiple element arrangement may include some or all of the following components: products, accessories, installation services and extended warranty contracts. The total sales price is allocated based on the relative fair value of each component. We record deferred revenue for service contracts and customer deposits. Deferred revenue related to service contracts and extended warranties is recognized over the life of the contract based on the stated contractual price, typically one to two years.
Taxes Collected from Customers and Remitted to Governmental Authorities	Taxes Collected from Customers and Remitted to Governmental Authorities
	We account for tax assessed by a governmental authority that is directly imposed on a revenue-producing transaction (i.e., sales, use, value added) on a net (excluded from revenue) basis.
Shipping and Handling Costs	Shipping and Handling Costs
	Shipping and handling costs are included as a component of Cost of sales.
Significant Customers	Significant Customers
	No customer in 2014, 2013 or 2012 accounted for 10% or more of our total revenues. At December 31, 2014 and 2013, no customers represented 10% or more of our gross accounts receivable balance.
Product Warranty	Product Warranty
	We estimate a liability for costs to repair or replace products under warranty for periods ranging from 90 days to one year when the related product revenue is recognized. The liability for product warranties is calculated as a percentage of sales. The percentage is based on historical product repair costs. The liability for product warranties is included in Accrued liabilities. Product warranty activity was as follows (in thousands):
	Warranty accrual, December 31, 2011		$	729
	Reductions for warranty charges			(888	)
	Additions to warranty reserve			875
	Warranty accrual, December 31, 2012			716
	Reductions for warranty charges			(798	)
	Additions to warranty reserve			827
	Warranty accrual, December 31, 2013			745
	Reductions for warranty charges			(812	)
	Additions to warranty reserve			864
	Warranty accrual, December 31, 2014		$	797
	Additions to the warranty reserve in 2013 include accrued warranty costs of $0.2 million assumed with the acquisitions in 2013 as discussed in Note 3.
Advertising	Advertising
	Advertising costs, which are included as a component of Selling, general and administrative expense, are expensed as incurred and have been insignificant.
Research and Development	Research and Development
	Research and development costs are expensed as incurred.
Legal Costs	Legal Costs
	We may be a party to legal proceedings arising in the normal course of business. We accrue for certain legal costs, including attorney fees, and potential settlement claims related to various legal proceedings that are estimable and probable. If not estimable and probable, legal costs are expensed as incurred. Legal costs related to patents are included in Research and development expense. All other legal costs are included in Selling, general and administrative expense.
Forward Exchange Contracts	Forward Exchange Contracts
	We enter into forward foreign currency exchange contracts, which typically expire within six months, to manage our exposure against foreign currency fluctuations in either the euro or Japanese yen. These foreign exchange contracts are not considered hedges and, as such, are recorded at fair value on the balance sheet with any changes in fair value included as Other income (expense), net in our Consolidated Statements of Operations. At December 31, 2014 and 2013, we had $25.3 million and $27.1 million, respectively, of forward exchange contracts outstanding. The unrealized gain (loss) on contracts outstanding was as follows (in thousands):
			December 31,
			2014			2013
	Unrealized gain (loss)		$	1,020		$	(437	)
Income Taxes	Income Taxes
	Deferred income taxes are established for the difference between the financial reporting and income tax basis of assets and liabilities as well as operating loss and tax credit carryforwards. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that all or some portion of the deferred tax assets will not be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date.
	We recognize the benefits of tax return positions if we determine that the positions are “more-likely-than-not” to be sustained by the taxing authority. Interest and penalties accrued on unrecognized tax benefits are recorded as tax expense in the period incurred. We are subject to income taxes within the U.S. and foreign jurisdictions, and, in the ordinary course of business, there are transactions and calculations where the ultimate tax determination is uncertain. We report a liability (or contra asset) for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in a tax return.
Net Income Per Share	Net Income Per Share
	Basic net income per share is computed by dividing the net income attributed to common shareholders for the period by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share incorporates the incremental shares issuable upon the assumed exercise of stock options and vesting of restricted stock units using the treasury stock method, if dilutive.
	The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Shares used to calculate basic net income per share			16,323			14,792			14,182
	Dilutive effect of outstanding options and restricted stock units (“RSUs”)			505			358			208
	Shares used to calculate diluted net income per share			16,828			15,150			14,390
	Securities not considered as they would have been antidilutive			793			1,094			1,271
Stock-Based Compensation	Stock-Based Compensation
	We calculate stock-based compensation expense utilizing fair value-based methodologies and recognize the expense on a straight-line basis over the vesting period of such awards. The fair value of stock option awards is based on the Black-Scholes option pricing model, and the fair value of restricted stock units and stock awards is based on the fair value of our common stock on the date of grant. Compensation expense recorded for awards that do not vest is reversed in the period that it is determined that the award will not vest.
Certain Risks and Uncertainties	Certain Risks and Uncertainties
	Our future operating results and financial condition are subject to influences driven by rapid technological changes, a highly competitive industry, a lengthy sales cycle, and the cyclical nature of general economic conditions. Future operating results will depend on many factors, including demand for our products, the introduction and industry acceptance of new products and the level and timing of available shippable orders and backlog.
	In addition, we rely on several suppliers to provide certain key components used in our products. Some of these items are available from only one supplier or a limited group of suppliers. Any disruption in the availability and delivery of these items could adversely affect our revenues and results of operations.
Segment Reporting	Segment Reporting
	We operate in two business segments: Systems and Probes. Sales of our probe stations, reliability test systems and thermal subsystems are included in the Systems segment. Sales of our analytical probes and production probe cards are included in the Probes segment.
Foreign Currency Translation	Foreign Currency Translation
	The local currency is the functional currency for each of our foreign subsidiaries. Assets and liabilities are translated into U.S. dollars at current exchange rates, and sales and expenses are translated using average rates. Gains and losses from translation of assets and liabilities are included in Accumulated other comprehensive income (loss) in our Consolidated Balance Sheets.
Fair value measurements, policy	Various inputs are used in determining the fair value of our financial assets and liabilities and are summarized into three broad categories:
		•		Level 1 – quoted prices in active markets for identical securities;
		•		Level 2 – other significant observable inputs, including quoted prices for similar securities, interest rates, credit risk, etc.; and
		•		Level 3 – significant unobservable inputs, including our own assumptions in determining fair value.
	The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.
Fair value of marketable securities, policy	The fair value of our marketable securities is determined based on quoted market prices for similar or identical securities. The fair value of our forward contracts is based on quoted market prices for similar securities and is used for the purpose of determining any gain or loss on our foreign currency positions. We do not record the full value of the forward contracts in our Condensed Consolidated Balance Sheets. We record the net unrealized gain or loss in our Consolidated Statements of Operations and as a component of Other income (expense).

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Schedule of Allowance for Doubtful Accounts	Activity related to our allowance for doubtful accounts was as follows (in thousands):
	Balance, December 31, 2011	$	266
	Charges to costs and expenses		133
	Write-offs		(155	)
	Recoveries		101
	Balance, December 31, 2012		345
	Charges to costs and expenses		20
	Write-offs		(96	)
	Recoveries		—
	Balance, December 31, 2013		269
	Charges to costs and expenses		(50	)
	Write-offs		(14	)
	Recoveries		3
	Balance, December 31, 2014	$	208
Inventory Charges	Inventory charges were as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Inventory charges	$	1,816		$	1,559		$	1,381
Product Warranty Activity	Product warranty activity was as follows (in thousands):
	Warranty accrual, December 31, 2011	$	729
	Reductions for warranty charges		(888	)
	Additions to warranty reserve		875
	Warranty accrual, December 31, 2012		716
	Reductions for warranty charges		(798	)
	Additions to warranty reserve		827
	Warranty accrual, December 31, 2013		745
	Reductions for warranty charges		(812	)
	Additions to warranty reserve		864
	Warranty accrual, December 31, 2014	$	797
Unrealized Gain (Loss) on Contracts	The unrealized gain (loss) on contracts outstanding was as follows (in thousands):
		December 31,
		2014			2013
	Unrealized gain (loss)	$	1,020		$	(437	)
Basic and Diluted Net Income Per Share	The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Shares used to calculate basic net income per share		16,323			14,792			14,182
	Dilutive effect of outstanding options and restricted stock units (“RSUs”)		505			358			208
	Shares used to calculate diluted net income per share		16,828			15,150			14,390
	Securities not considered as they would have been antidilutive		793			1,094			1,271

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Acquisition of ATT Systems
Schedule of Purchase Price Allocation	The allocation of the purchase price for the ATT Acquisition was as follows (dollars in thousands):
	Assets:				Useful Life
	Cash	$	559			—
	Accounts receivable		408			—
	Inventory		2,585			—
	Prepaid expenses and other		1,393			—
	Fixed assets		137			3 years
	Goodwill		12,551			—
	Other intangible assets:
	Core technology		10,266			6 years
	Customer relationships		3,377			8 years
	Trademarks and tradenames		1,216			10 years
			14,859
			32,492
	Liabilities:
	Accounts payable		518			—
	Accrued liabilities		252			—
	Long-term deferred tax liability		4,061			6-10 years
			4,831
	Net assets acquired	$	27,661
Schedule of Operating Results of ATT and RTPs Systems	ATT System’s results of operations have been included in our consolidated financial statements and Systems segment subsequent to the date of acquisition as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Revenue	$	12,936		$	3,778
	Operating income		2,749			448
Schedule of Pro Forma Results of Operations	The unaudited pro forma results of operations, as if the ATT Acquisition had occurred on January 1, 2012 were as follows (in thousands):
		Year Ended December 31,
		2013			2012
	Pro forma revenue	$	127,618		$	118,508
	Pro forma net income		14,564			5,834
	Pro forma basic net income per share		0.9			0.37
	Pro forma diluted net income per share		0.88			0.36
Acquisition of RTP
Schedule of Purchase Price Allocation	The allocation of the purchase price for the RTP Acquisition was as follows (dollars in thousands):
					Useful Life
	Current assets	$	1,198			—
	Fixed assets		17			2 years
	Goodwill		641			—
	Other intangible assets:
	Core technology		930			5 years
	Customer relationships		490			12 years
			1,420
	Current liabilities		(62	)		—
	Net assets acquired	$	3,214
Schedule of Operating Results of ATT and RTPs Systems	RTP’s results of operations have been included in our consolidated financial statements and Systems segment subsequent to the date of acquisition as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Revenue	$	2,954		$	1,222
	Operating loss		595			40

Marketable_Securities_Tables

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Information Regarding Marketable Securities	Certain information regarding our marketable securities was as follows (in thousands):
		December 31,
		2014		2013
	Fair value:
	Corporate obligations	$	1,620	$	4,277
	Corporate equities		6		1
		$	1,626	$	4,278
	Cost:
	Corporate obligations	$	1,620	$	4,276
	Corporate equities		6		1
		$	1,626	$	4,277
	Fair value by maturity:
	Within one year	$	1,620	$	4,277
	One to two years		—		—
	Corporate equities		6		1
		$	1,626	$	4,278
	Gross unrealized holding gains:
	Corporate obligations	$	—	$	1
	U.S. treasury and agency securities		—		—
		$	—	$	1
	Gross unrealized holding losses:
	Corporate obligations	$	—	$	—
	U.S. treasury and agency securities		—		—
		$	—	$	—

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and (Liabilities) Measured on Recurring Basis	The disclosures related to our financial assets and (liabilities) that are reported at fair value on a recurring basis are as follows (in thousands):
		December 31, 2014					December 31, 2013
		Fair Value			Input Level		Fair Value			Input Level
	Marketable securities – corporate equities	$	6			Level 1	$	1			Level 1
	Marketable securities – corporate obligations	$	1,620			Level 2	$	4,277			Level 2
	Forward sale contracts for Japanese yen	$	2,510			Level 2	$	523			Level 2
	Forward purchase contract for euro	$	726			Level 2	$	2,061			Level 2
	Forward sale contract for euro	$	22,056			Level 2	$	24,561			Level 2
	Contingent consideration related to the RTP Acquisition	$	—			Level 3	$	(1,350	)		Level 3
Summary of Level 3 Activity for Contingent Consideration Liability	The following table summarizes our Level 3 activity for our contingent consideration liability (in thousands):
		Level 3
	Balance at December 31, 2013	$	1,350
	Decrease in contingent consideration due to re-measurement		(522	)
	Payment of contingent consideration		(828	)
	Balance at December 31, 2014	$	—

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in thousands):
		December 31,
		2014		2013
	Raw materials	$	14,120	$	15,234
	Work-in-process		3,809		2,958
	Finished goods		6,713		6,692
		$	24,642	$	24,884

Fixed_Assets_Tables

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Fixed Assets and Depreciation Expense	Fixed assets consisted of the following (in thousands):
		December 31,
		2014			2013
	Equipment	$	25,749		$	25,673
	Leasehold improvements		9,220			8,253
	Construction in progress		1,538			207
			36,507			34,133
	Less accumulated depreciation		(28,407	)		(27,730	)
		$	8,100		$	6,403
	Depreciation expense was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Depreciation expense	$	3,335		$	3,661		$	3,547

Goodwill_and_Purchased_Intangi1

Goodwill and Purchased Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Change in Goodwill	The change in goodwill was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance, beginning of period	$	14,471		$	990		$	971
	Acquisition of RTP		—			641			—
	Acquisition of ATT Systems		—			12,551			—
	Effect of exchange rate changes		(1,648	)		289			19
	Balance, end of period	$	12,823		$	14,471		$	990
Intangible Assets, Net	Intangible assets, net included the following (in thousands):
		December 31,
		2014			2013
	Purchased Intangible Assets
	Customer relationships	$	4,323		$	7,198
	Core technology		12,481			13,728
	Trademarks and tradenames		1,092			1,239
			17,896			22,165
	Less accumulated amortization		(5,324	)		(5,228	)
		$	12,572		$	16,937
	Patents
	Patents	$	4,632		$	4,632
	Less accumulated amortization		(4,540	)		(4,349	)
		$	92		$	283
Intangible Asset Amortization	Intangible asset amortization is a component of Selling, general and administrative expense and was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Intangible amortization	$	3,011		$	1,522		$	1,082
Estimated Amortization of Intangible Assets	The estimated amortization of intangible assets is as follows over the next five years and thereafter (in thousands):
	2015	$	2,632
	2016		2,340
	2017		2,321
	2018		2,244
	2019		1,751
	Thereafter		1,376
		$	12,664

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued liabilities consisted of the following (in thousands):
		December 31,
		2014		2013
	Accrued compensation and benefits	$	3,606	$	2,812
	Accrued sales taxes and VAT		276		470
	Accrued income taxes		1,628		492
	Accrued warranty		797		745
	Contingent consideration related to RTP acquisition		—		1,350
	Payable to seller related to ATT acquisition		456		746
	Accrued restructuring costs		1,959		1,163
	Other		783		1,081
		$	9,505	$	8,859

Tax_Provision_Tables

Tax Provision (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic and Foreign Pre-Tax Income from Continuing Operations	Domestic and foreign pre-tax income from continuing operations was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Domestic	$	8,076		$	5,619		$	4,933
	Foreign		4,588			1,462			1,875
		$	12,664		$	7,081		$	6,808
Income Tax Expense (Benefit) from Continuing Operations	The income tax expense (benefit) from continuing operations consisted of the following (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	1,086		$	(253	)	$	13
	State		184			(39	)		32
	Foreign		1,862			1,039			752
	Total current		3,132			747			797
	Deferred:
	Federal		133			(5,912	)		—
	State		46			(928	)		—
	Foreign		(577	)		(244	)		(88	)
	Total deferred		(398	)		(7,084	)		(88	)
	Income tax (benefit) expense	$	2,734		$	(6,337	)	$	709
Reconciliation between Income Taxes Computed at Federal Statutory Rate and Provision (Benefit) for Income Taxes	The income tax (benefit) provision varies from the amounts computed by applying the Federal statutory rate of 34% to income from continuing operations before income taxes as follows (in thousands):
	Year Ended December 31,	Year Ended December 31,
		2014			2013			2012
	Federal income tax provision computed at statutory rates	$	4,269		$	2,407		$	2,281
	Difference in foreign tax rate		(405	)		174			(141	)
	State income taxes, net of federal benefit		142			140			27
	Stock-based compensation		142			966			96
	Research and development tax credits		(33	)		(256	)		56
	Expiration of tax credits		236			167			200
	Foreign tax credits		(2,527	)		(47	)		(136	)
	Foreign dividend		1,281			—			—
	Change in valuation allowance		(158	)		(9,656	)		(1,877	)
	Unrecognized tax benefits		8			9			9
	Foreign earnings not permanently reinvested		—			(207	)		(58	)
	Domestic production deduction		(251	)		—			—
	Other		30			(34	)		252
	Provision for (benefit from) income taxes	$	2,734		$	(6,337	)	$	709
Components of Deferred Income Tax Assets and Liabilities	Significant components of deferred income tax assets and liabilities were as follows (in thousands):
		December 31,
		2014			2013
	Current deferred tax assets:
	Reserves and allowances	$	273		$	420
	Inventory		1,037			1,019
	Accrued vacation and bonus		664			435
	Unrealized loss on forward contracts		856			132
	Other current deferred tax assets		197			262
	Gross current deferred tax assets		3,027			2,268
	Valuation allowance		—			—
	Net current deferred tax assets		3,027			2,268
	Non-current deferred tax assets:
	Reserves and allowances		182			174
	Federal and state net operating loss (“NOL”) carryforwards		21			573
	Federal and state tax credits		1,781			2,640
	Stock-based compensation		565			506
	Intangibles		1,278			1,225
	Other non-current deferred tax assets		637			768
	Gross non-current deferred tax assets		4,464			5,886
	Valuation allowance		—			(158	)
	Net non-current deferred tax assets		4,464			5,728
	Non-current deferred tax liabilities:
	Foreign earnings		—			(536	)
	Intangibles		(2,936	)		(3,843	)
	Other non-current deferred tax liabilities		(266	)		(114	)
	Total non-current deferred tax liabilities		(3,202	)		(4,493	)
	Non-current deferred tax assets, net		1,262			1,235
	Net total deferred tax assets	$	4,289		$	3,503
Valuation Allowance	The total valuation allowance was as follows (in thousands):
		December 31,
		2014			2013
	Valuation allowance	$	—		$	158
Net Decrease in Total Valuation Allowance	The net decrease in the total valuation allowance was as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Decrease in valuation allowance	$	(158	)	$	(9,656	)	$	(1,877	)
Net Operating Loss and Tax Credit Carryforwards	We had tax NOL and credit carryforwards as of December 31, 2014 as follows:
		Amount			Expiration
					Date
	Federal and state research and experimentation credit carryforwards	$	1.8 million			2014-2034
	State NOL carryforwards		0.8 million			2016-2031
Reconciliation of Unrecognized Tax Benefits	A reconciliation of unrecognized tax benefits was as follows (in thousands):
	Balance, December 31, 2011	$	141
	Increases due to tax positions taken during the current year		—
	Increases due to tax positions taken during a prior year		9
	Balance, December 31, 2012		150
	Increases due to tax positions taken during the current year		9
	Increases due to tax positions taken during a prior year		—
	Balance, December 31, 2013		159
	Increases due to tax positions taken during the current year		—
	Decreases due to tax positions taken during a prior year		(5	)
	Balance, December 31, 2014	$	154
Open Tax Year	The tax years that remained open to examination in our major taxing jurisdictions as of December 31, 2014 were as follows:
	Jurisdiction	Open Tax Years
	U.S.		2011-2014
	Japan		2008-2014
	Germany		2010-2014

Other_Income_Expense_Net_Table

Other Income (Expense), Net (Tables)	12 Months Ended
	Dec. 31, 2014
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Other income (expense), net consisted of the following (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Interest income, net	$	29		$	44		$	52
	Foreign currency losses		(3,629	)		(311	)		(950	)
	Gains on foreign currency forward contracts		3,016			90			166
	Other		(36	)		(75	)		(17	)
		$	(620	)	$	(252	)	$	(749	)

StockBased_Compensation_and_St1

Stock-Based Compensation and Stock-Based Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Certain Information Regarding Stock-Based Compensation	Certain information regarding our stock-based compensation was as follows (in thousands, except per share amounts):
		Year Ended December 31,
		2014			2013		2012
	Weighted average grant-date per share fair value of stock options granted	$	5.58		$	5.35	$	2.56
	Total intrinsic value of stock options exercised		377			523		4
	Fair value of restricted shares vested		2,309			1,398		1,236
	Tax benefit realized from stock options exercised and restricted stock units (“RSUs”) released		954			729		436
	Tax benefit recognized in our Consolidated Statements of Operations related to stock-based compensation		750			537		25
Stock-Based Compensation Included in Consolidated Statements of Operations	Our stock-based compensation was included in our Consolidated Statements of Operations as follows (in thousands):
		Year Ended December 31,
		2014			2013		2012
	Cost of sales	$	234		$	201	$	165
	Research and development		321			198		242
	Selling, general and administrative		1,927			1,215		1,052
		$	2,482		$	1,614	$	1,459
Weighted-Average Assumptions Used to Determine Fair Value of Stock-Based Awards Granted	To determine the fair value of stock-based awards granted, we used the Black-Scholes option pricing model and the following weighted-average assumptions:
		Year Ended December 31,
		2014		2013	2012
	Stock Option Plan
	Risk-free interest rate	1.80%		1.1% - 1.8%	0.8% - 1.2%
	Expected dividend yield	0.00%		0.00%	0.00%
	Expected term	6.25 years		6.25 years	6.5 years
	Expected volatility	61.20%		60.6% - 61.0%	58.2% - 59.4%
	Employee Stock Purchase Plan
	Risk-free interest rate	0.10%		0.80%	0.1% - 0.2%
	Expected dividend yield	0.00%		0.00%	0.00%
	Expected term	6 months		6 months	6 months
	Expected volatility	35.4% - 37.8%		24.5% - 31.5%	40.1% - 54.3%
Stock Option Activity	Stock option activity for the year ended December 31, 2014 and other Plan information was as follows:
		Options			Weighted
		Outstanding			Average
					Exercise Price
	Outstanding at December 31, 2013		1,042,937		$	6.52
	Granted		90,000			9.61
	Exercised		(148,166	)		9.9
	Forfeited		(67,992	)		9.01
	Outstanding at December 31, 2014		916,779			6.1
Certain Information Regarding Options Outstanding	Certain information regarding options outstanding as of December 31, 2014 was as follows:
		Options			Options
		Outstanding			Exercisable
	Number		916,779			555,689
	Weighted-average exercise price	$	6.1		$	5.48
	Aggregate intrinsic value	$	7,803,203		$	5,071,011
	Weighted-average remaining contractual term (in years)		6.38			5.36
Summary of Restricted Stock Units Activity	RSU activity for the year ended December 31, 2014 was as follows:
		Restricted			Weighted
		Stock			Average
		Units			Grant Date
					Per Share
					Fair Value
	Outstanding at December 31, 2013		409,403		$	6.87
	Granted		226,400			10.47
	Vested		(205,739	)		7.04
	Forfeited		(34,340	)		6.98
	Outstanding at December 31, 2014		395,724			8.83
Information Relates to Employee Stock Purchase Plan	The following information relates to our 2013 ESPP activity during 2014:
	Shares issued pursuant to the 2013 ESPP		70,533
	Weighted average price of shares issued	$	9
	Discount per share from the fair market value on the dates of purchase	$	1.71
	Shares remaining available for purchase pursuant to the 2013 ESPP as of December 31, 2014		929,467

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2014
FEI Company
Summary of Related Party Transactions	Information regarding our transactions with FEI is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment and services purchased from FEI	$	36	$	33	$	37
	Equipment sold to FEI		5		—		—
		December 31,
		2014		2013
	Due to FEI	$	10	$	8
	Due from FEI		—		—
Raytheon, Inc.
Summary of Related Party Transactions	Information regarding our transactions with Raytheon is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment sold to Raytheon	$	176	$	607	$	267
		December 31,
		2014		2013
	Due from Raytheon	$	21	$	10
Lam Research Corporation
Summary of Related Party Transactions	Information regarding our transactions with Lam is as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Equipment sold to Lam	$	388	$	—	$	21
		December 31,
		2014		2013
	Due from Lam	$	3	$	—

Employee_Benefit_Plan_Tables

Employee Benefit Plan (Tables)	12 Months Ended
	Dec. 31, 2014
Postemployment Benefits [Abstract]
Employer Matching Contributions for Savings Plan	Our matching contributions for the savings plan were as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	401(k) matching contributions	$	534	$	412	$	362

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments under Non-Cancelable Operating Leases	Future minimum lease payments under non-cancelable operating leases with initial or remaining terms in excess of one year are as follows (in thousands):
	Year Ending December 31,
	2015	$	3,605
	2016		2,088
	2017		2,085
	2018		1,418
	2019		1,450
	Thereafter		597
	Total minimum lease payments	$	11,243
Lease Expense	Lease expense was as follows (in thousands).
		Year Ended December 31,
		2014		2013		2012
	Lease expense	$	2,630	$	2,656	$	2,575

Restructuring_Tables

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring charges were as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Termination and severance related	$	683	$	—	$	—
	Lease abandonment and termination		553		227		—
		$	1,236	$	227	$	—
Restructuring Costs of Consolidated Statements of Operations	Restructuring costs were included in our Consolidated Statements of Operations as follows (in thousands):
		Year Ended December 31,
		2014		2013		2012
	Cost of sales	$	154	$	—	$	—
	Selling, general and administrative		1,082		227		—
		$	1,236	$	227	$	—
Charges, Expenditures, Write-Offs and Adjustments Related to Restructuring Accruals	The following tables summarize the charges, expenditures and write-offs and adjustments related to our restructuring accruals (in thousands):
	Year Ended December 31, 2014	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Termination and severance related	$	—	$	683	$	(375	)	$	—	$	308
	Lease abandonment		2,129		553		(1,031	)		—		1,651
		$	2,129	$	1,236	$	(1,406	)	$	—	$	1,959
	Year Ended December 31, 2013	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Lease abandonment	$	3,034	$	227	$	(1,132	)	$	—	$	2,129
	Year Ended December 31, 2012	Beginning		Charged to		Expend-			Write-Offs		Ending
		Accrued		Expense,		itures			and		Accrued
		Liability		Net					Adjust-		Liability
									ments
	Termination and severance related	$	10	$	—	$	(10	)	$	—	$	—
	Lease abandonment		4,137		—		(1,103	)		—		3,034
		$	4,147	$	—	$	(1,113	)	$	—	$	3,034

Segment_Reporting_and_Enterpri1

Segment Reporting and Enterprise-Wide Disclosures (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Revenue and Operating Income Information by Segment	Revenue and operating income information by segment was as follows (dollars in thousands):
	Year Ended December 31, 2014		Systems			Probes			Corporate			Total
									Unallocated
	Revenue		$	82,850		$	53,172		$	—		$	136,022
	Gross profit		$	37,775		$	32,539		$	—		$	70,314
	Gross margin			45.6	%		61.2	%		—			51.7	%
	Income (loss) from operations		$	7,553		$	20,768		$	(15,037	)	$	13,284
	Year Ended December 31, 2013
	Revenue		$	79,229		$	40,781		$	—		$	120,010
	Gross profit		$	33,177		$	21,547		$	—		$	54,724
	Gross margin			41.9	%		52.8	%		—			45.6	%
	Income (loss) from operations(1)		$	9,794		$	11,568		$	(14,029	)	$	7,333
	Year Ended December 31, 2012
	Revenue		$	74,368		$	38,595		$	—		$	112,963
	Gross profit		$	29,391		$	20,560		$	—		$	49,951
	Gross margin			39.5	%		53.3	%		—			44.2	%
	Income (loss) from operations(1)		$	9,651		$	10,158		$	(12,252	)	$	7,557
	-1	Amortization expense of $1.2 million and $0.7 million for the years ended December 31, 2013 and 2012, respectively, was reclassified from Corporate Unallocated to Systems to conform with the current year presentation.
Revenues by Geographic Area	Our revenues by geographic area were as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	United States		$	39,855		$	37,662		$	33,445
	Asia Pacific			63,660			50,748			51,290
	Europe			30,076			28,334			25,718
	Other			2,431			3,266			2,510
			$	136,022		$	120,010		$	112,963
Long-Lived Assets, Exclusive of Deferred Income Taxes, by Geographic Area	Long-lived assets, exclusive of deferred income taxes, by geographic area were as follows (in thousands):
			December 31,
			2014			2013
	United States		$	9,334		$	8,660
	Asia Pacific			304			339
	Europe			24,801			29,926
			$	34,439		$	38,925

Stock_Repurchase_Plans_Tables

Stock Repurchase Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Summary of Information Regarding Repurchases of Common Stock	Information regarding repurchases made pursuant to this program is as follows (dollars in thousands, except per share amounts):
	Period	Number		Weighted		Total		Amount
		of Shares		average		purchase		remaining
				per share		price		for
				purchase				repurchase
				price
	Fourth quarter of 2012		59,006	$	5.6	$	332	$	1,668
	First quarter of 2013		9,800		5.87		58		1,610
	First quarter of 2014		88,445		9.24		817		793
	Second quarter of 2014		22,811		9.45		216		2,577
	Fourth quarter of 2014		3,900		9.47		37		2,540
			183,962		7.94		1,460		2,540

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Segment
Significant Accounting Policies [Line Items]
Cash equivalents	$6,600,000	$4,000,000
Property plant and equipment estimated useful life	3 years
Capitalized interest for long-lived assets	0	0	0
Other assets, net	944,000	1,114,000
Impairment of long-lived assets	0	0	0
Major customer description	No customer in 2014, 2013 or 2012 accounted for 10% or more of our total revenues. At December 31, 2014 and 2013, no customers represented 10% or more of our gross accounts receivable balance.
Additions to warranty reserve	864,000	827,000	875,000
Forward foreign currency exchange contracts, expiration period	6 months
Number of operating business segments	2
Forward Exchange Contracts
Significant Accounting Policies [Line Items]
Forward exchange contracts outstanding	25,300,000	27,100,000
Customer Concentration Risk | Total Revenue
Significant Accounting Policies [Line Items]
Number of customers accounted for 10% or greater of our total revenue	0	0	0
Customer Concentration Risk | Accounts Receivable
Significant Accounting Policies [Line Items]
Number of customers accounted for 10% or greater of our total revenue	0	0
Patents
Significant Accounting Policies [Line Items]
Other assets, net	100,000	300,000
Minimum
Significant Accounting Policies [Line Items]
Inventory sold period	12 months
Property plant and equipment estimated useful life	2 years
Estimated useful life of intangible assets	1 year
Deferred revenue for service contracts recognition period	1 year
Product warranty period	90 days
Minimum | Acquisition of ATT Systems
Significant Accounting Policies [Line Items]
Additions to warranty reserve	$200,000
Minimum | Customer Concentration Risk | Total Revenue
Significant Accounting Policies [Line Items]
Percentage of revenue for specified number of customer in relation to aggregate revenue	10.00%	10.00%	10.00%
Minimum | Customer Concentration Risk | Accounts Receivable
Significant Accounting Policies [Line Items]
Percentage of revenue for specified number of customer in relation to aggregate revenue	10.00%	10.00%
Minimum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	1 year
Maximum
Significant Accounting Policies [Line Items]
Inventory sold period	18 months
Property plant and equipment estimated useful life	7 years
Estimated useful life of intangible assets	12 years
Deferred revenue for service contracts recognition period	2 years
Product warranty period	1 year
Maximum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	8 years

Schedule_of_Allowance_for_Doub

Schedule of Allowance for Doubtful Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Beginning balance	$269	$345	$266
Charges to costs and expenses	-50	20	133
Write-offs	-14	-96	-155
Recoveries	3		101
Ending balance	$208	$269	$345

Inventory_Charges_Detail

Inventory Charges (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Inventory charges	$1,816	$1,559	$1,381

Product_Warranty_Activity_Deta

Product Warranty Activity (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Guarantees [Abstract]
Warranty accrual, beginning of period	$745	$716	$729
Reductions for warranty charges	-812	-798	-888
Additions to warranty reserve	864	827	875
Warranty accrual, end of period	$797	$745	$716

Unrealized_Gain_Loss_on_Contra

Unrealized Gain (Loss) on Contracts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Unrealized Gain (Loss) on Derivatives and Commodity Contracts [Abstract]
Unrealized gain (loss)	$1,020	($437)

Basic_and_Diluted_Net_Income_P

Basic and Diluted Net Income Per Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Shares used to calculate basic net income per share	16,323	14,792	14,182
Dilutive effect of outstanding options and restricted stock units ("RSUs")	505	358	208
Shares used to calculate diluted net income per share	16,828	15,150	14,390
Securities not considered as they would have been antidilutive	793	1,094	1,271

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail)

12 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

Share data in Millions, unless otherwise specified

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Oct. 02, 2014

Oct. 02, 2013

Oct. 02, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 31, 2013

Dec. 31, 2014

Jul. 31, 2013

Dec. 31, 2014

USD ($)

USD ($)

EUR (€)

Acquisition of ATT Systems

Acquisition of ATT Systems

Acquisition of ATT Systems

Acquisition of ATT Systems

Acquisition of ATT Systems

Acquisition of RTP

Acquisition of RTP

Acquisition of RTP

Acquisition of RTP

EUR (€)

USD ($)

EUR (€)

USD ($)

1-Oct-15

USD ($)

USD ($)

Fair Value, Inputs, Level 3

Selling, general and administrative

EUR (€)

Contingent consideration related to the RTP Acquisition

Fair Value, Inputs, Level 3

USD ($)

Contingent consideration related to the RTP Acquisition

USD ($)

Business Acquisition [Line Items]

Total consideration net of cash acquired

$1,528,000

$13,253,000

$13,000,000

€ 9,600,000

Common stock issued in acquisition

1.6

1.6

Common stock issued in acquisition, value

14,500,000

Acquisition of certain assets in cash

8,800,000

1,900,000

Consideration to be paid

400,000

400,000

Total working capital adjustment

200,000

200,000

Weighted average amortization period

6 years 9 months 18 days

6 years 9 months 18 days

7 years 4 months 24 days

Business acquisition, transaction costs

700,000

200,000

Contingent consideration paid

800,000

Fair value of contingent consideration

1,300,000

Contingent consideration credited to selling, general and administrative expenses

$500,000

Schedule_of_Purchase_Price_All

Schedule of Purchase Price Allocation (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets:
Fixed assets, Useful Life	3 years
Goodwill	$12,823	$14,471	$990	$971
Minimum
Assets:
Fixed assets, Useful Life	2 years
Useful Life	1 year
Liabilities:
Long-term deferred tax liability	6 years
Maximum
Assets:
Fixed assets, Useful Life	7 years
Useful Life	12 years
Liabilities:
Long-term deferred tax liability	10 years
Core technology
Assets:
Useful Life	6 years
Customer relationships
Assets:
Useful Life	8 years
Trademarks and tradenames
Assets:
Useful Life	10 years
Acquisition of ATT Systems
Assets:
Cash	559
Accounts receivable	408
Inventory	2,585
Prepaid expenses and other	1,393
Fixed assets	137
Goodwill	12,551
Other intangible assets	14,859
Total assets	32,492
Liabilities:
Accounts payable	518
Accrued liabilities	252
Long-term deferred tax liability	4,061
Total liabilities	4,831
Net assets acquired	27,661
Acquisition of ATT Systems | Core technology
Assets:
Other intangible assets	10,266
Acquisition of ATT Systems | Customer relationships
Assets:
Other intangible assets	3,377
Acquisition of ATT Systems | Trademarks and tradenames
Assets:
Other intangible assets	1,216
Acquisition of RTP
Assets:
Current assets	1,198
Fixed assets, Useful Life	2 years
Fixed assets	17
Goodwill	641
Other intangible assets	1,420
Liabilities:
Current liabilities	-62
Net assets acquired	3,214
Acquisition of RTP | Core technology
Assets:
Useful Life	5 years
Other intangible assets	930
Acquisition of RTP | Customer relationships
Assets:
Useful Life	12 years
Other intangible assets	$490

Schedule_of_Operating_Results_

Schedule of Operating Results of ATT and RTPs Systems (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Revenue	$136,022	$120,010	$112,963
Operating income (loss)	13,284	7,333	7,557
Acquisition of ATT Systems
Business Acquisition [Line Items]
Revenue	12,936	3,778
Operating income (loss)	2,749	448
Acquisition of RTP
Business Acquisition [Line Items]
Revenue	2,954	1,222
Operating income (loss)	$595	$40

Schedule_of_Pro_Forma_Results_

Schedule of Pro Forma Results of Operations (Detail) (Acquisition of ATT Systems, USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Acquisition of ATT Systems
Business Acquisition [Line Items]
Pro forma revenue	$127,618	$118,508
Pro forma net income	$14,564	$5,834
Pro forma basic net income per share	$0.90	$0.37
Pro forma diluted net income per share	$0.88	$0.36

Information_Regarding_Marketab

Information Regarding Marketable Securities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, fair value	$1,626	$4,278
Marketable securities, at cost	1,626	4,277
Marketable securities, fair value	1,626	4,278
Marketable securities, fair value, within one year	1,620	4,277
Gross unrealized holding gains		1
Marketable securities, fair value, one to two years	0	0
Gross unrealized holding losses	0	0
Corporate obligations
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, fair value	1,620	4,277
Marketable securities, at cost	1,620	4,276
Marketable securities, fair value	1,620	4,277
Gross unrealized holding gains		1
Gross unrealized holding losses	0	0
Corporate equities
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, fair value	6	1
Marketable securities, at cost	6	1
Marketable securities, fair value	6	1
U.S. treasury and agency securities
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized holding losses	$0	$0

Fair_Value_of_Financial_Assets

Fair Value of Financial Assets and (Liabilities) Measured on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Contingent consideration related to the RTP Acquisition | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities measured on recurring basis		($1,350)
Forward sale contracts | Japanese yen | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured on recurring basis	2,510	523
Forward sale contracts | Euro | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured on recurring basis	22,056	24,561
Forward purchase contract | Euro | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured on recurring basis	726	2,061
Corporate equities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured on recurring basis	6	1
Corporate obligations | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured on recurring basis	$1,620	$4,277

Summary_of_Level_3_Activity_fo

Summary of Level 3 Activity for Contingent Consideration Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Beginning balance	$1,350
Increase in contingent consideration due to re-measurement	-522
Payment of contingent consideration	($828)

Inventories_Detail

Inventories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$14,120	$15,234
Work-in-process	3,809	2,958
Finished goods	6,713	6,692
Inventories	$24,642	$24,884

Fixed_Assets_Detail

Fixed Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$36,507	$34,133
Less accumulated depreciation	-28,407	-27,730
Property plant and equipment net	8,100	6,403
Equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	25,749	25,673
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	9,220	8,253
Construction in progress
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$1,538	$207

Depreciation_Expense_Detail

Depreciation Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation expense	$3,335	$3,661	$3,547

Change_in_Goodwill_Detail

Change in Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Balance, beginning of period	$14,471	$990	$971
Effect of exchange rate changes	-1,648	289	19
Balance, end of period	12,823	14,471	990
Acquisition of RTP
Goodwill [Line Items]
Goodwill acquisition		641
Balance, end of period	641
Acquisition of ATT Systems
Goodwill [Line Items]
Goodwill acquisition		12,551
Balance, end of period	$12,551

Intangible_Assets_Net_Detail

Intangible Assets, Net (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Less accumulated amortization	($5,324)	($5,228)
Total, Net	12,572	16,937
Total, Net	12,664
Purchased Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Customer relationships	4,323	7,198
Core technology	12,481	13,728
Trademarks and tradenames	1,092	1,239
Total, Gross	17,896	22,165
Less accumulated amortization	-5,324	-5,228
Total, Net	12,572	16,937
Patents
Finite-Lived Intangible Assets [Line Items]
Total, Gross	4,632	4,632
Less accumulated amortization	-4,540	-4,349
Total, Net	$92	$283

Intangible_Asset_Amortization_

Intangible Asset Amortization (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$3,011	$1,522	$1,082
Selling, general and administrative
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$3,011	$1,522	$1,082

Estimated_Amortization_of_Inta

Estimated Amortization of Intangible Assets (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$2,632
2016	2,340
2017	2,321
2018	2,244
2019	1,751
Thereafter	1,376
Total, Net	$12,664

Accrued_Liabilities_Detail

Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$3,606	$2,812
Accrued sales taxes and VAT	276	470
Accrued income taxes	1,628	492
Accrued warranty	797	745
Accrued restructuring costs	1,959	1,163
Other	783	1,081
Accrued liabilities	9,505	8,859
Acquisition of RTP
Schedule of Accrued Liabilities [Line Items]
Contingent consideration related to RTP acquisition		1,350
Acquisition of ATT Systems
Schedule of Accrued Liabilities [Line Items]
Payable to seller related to ATT acquisition	$456	$746

Line_of_Credit_Additional_Info

Line of Credit - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Aug. 31, 2013
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$10,000,000
Line of credit facility, interest rate description	Interest is based primarily on the London Interbank Offered Rate ("LIBOR").
Line of credit facility, expiration date	31-Aug-15
Line of credit facility, amounts outstanding	0
Letters of credit, amounts outstanding	0
Line of credit facility, available for borrowing	10,000,000
Letters of credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$2,500,000

Domestic_and_Foreign_PreTax_In

Domestic and Foreign Pre-Tax Income from Continuing Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Domestic	$8,076	$5,619	$4,933
Foreign	4,588	1,462	1,875
Income before income taxes	$12,664	$7,081	$6,808

Income_Tax_Expense_Benefit_fro

Income Tax Expense (Benefit) from Continuing Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal	$1,086	($253)	$13
State	184	-39	32
Foreign	1,862	1,039	752
Total current	3,132	747	797
Federal	133	-5,912
State	46	-928
Foreign	-577	-244	-88
Total deferred	-398	-7,084	-88
Income tax (benefit) expense	$2,734	($6,337)	$709

Tax_Provision_Additional_Infor

Tax Provision - Additional Information (Detail) (USD $)	12 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014
Income Taxes [Line Items]
Federal statutory tax rate	34.00%
Undistributed foreign earnings	$8	$8
Japan
Income Taxes [Line Items]
Repatriated subsidiary earnings through cash dividend		2.5
Undistributed foreign earnings	$0.90	$0.90

Reconciliation_between_Income_

Reconciliation between Income Taxes Computed at Federal Statutory Rate and Provision (Benefit) for Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal income tax provision computed at statutory rates	$4,269	$2,407	$2,281
Difference in foreign tax rate	-405	174	-141
State income taxes, net of federal benefit	142	140	27
Stock-based compensation	142	966	96
Research and development tax credits	-33	-256	56
Expiration of tax credits	236	167	200
Foreign tax credits	-2,527	-47	-136
Foreign dividend	1,281
Change in valuation allowance	-158	-9,656	-1,877
Unrecognized tax benefits	8	9	9
Foreign earnings not permanently reinvested		-207	-58
Domestic production deduction	-251
Other	30	-34	252
Income tax (benefit) expense	$2,734	($6,337)	$709

Components_of_Deferred_Income_

Components of Deferred Income Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Inventory	$1,037	$1,019
Accrued vacation and bonus	664	435
Unrealized loss on forward contracts	856	132
Gross current deferred tax assets	3,027	2,268
Valuation allowance	0	0
Net current deferred tax assets	3,027	2,268
Federal and state net operating loss ("NOL") carryforwards	21	573
Federal and state tax credits	1,781	2,640
Stock-based compensation	565	506
Intangibles	1,278	1,225
Other non-current deferred tax assets	637	768
Gross non-current deferred tax assets	4,464	5,886
Valuation allowance		-158
Net non-current deferred tax assets	4,464	5,728
Foreign earnings		-536
Intangibles	-2,936	-3,843
Total non-current deferred tax liabilities	-3,202	-4,493
Non-current deferred tax assets, net	1,262	1,235
Net total deferred tax assets	4,289	3,503
Current
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Reserves and allowances	273	420
Other current deferred tax assets	197	262
Non Current
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Reserves and allowances	182	174
Other non-current deferred tax liabilities	($266)	($114)

Valuation_Allowance_Detail

Valuation Allowance (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Valuation allowance	$158

Net_Decrease_in_Total_Valuatio

Net Decrease in Total Valuation Allowance (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Decrease in valuation allowance	($158)	($9,656)	($1,877)

Net_Operating_Loss_and_Tax_Cre

Net Operating Loss and Tax Credit Carryforwards (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Federal and state research and experimentation credit carryforwards	1.8
State NOL carryforwards	0.8
Research and Development Tax Credit Carryforward | Minimum
Tax Credit Carryforward [Line Items]
Expiration date	2014
Research and Development Tax Credit Carryforward | Maximum
Tax Credit Carryforward [Line Items]
Expiration date	2034
State Net Operating Loss Carryforwards | Minimum
Tax Credit Carryforward [Line Items]
Expiration date	2016
State Net Operating Loss Carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Expiration date	2031

Reconciliation_of_Unrecognized

Reconciliation of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning Balance	$159	$150	$141
Increases due to tax positions taken during the current year		9
Increases due to tax positions taken during a prior year			9
Decreases due to tax positions taken during a prior year	-5
Ending Balance	$154	$159	$150

Open_Tax_Year_Detail

Open Tax Year (Detail)	12 Months Ended
	Dec. 31, 2014
U.S. | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2011
U.S. | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2014
Japan | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2008
Japan | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2014
Germany | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2010
Germany | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Open tax year	2014

Other_Income_Expense_Net_Detai

Other Income (Expense), Net (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income and Expenses [Abstract]
Interest income, net	$29	$44	$52
Foreign currency losses	-3,629	-311	-950
Gains on foreign currency forward contracts	3,016	90	166
Other	-36	-75	-17
Total other income (expense), net	($620)	($252)	($749)

Certain_Information_Regarding_

Certain Information Regarding Stock-Based Compensation (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average grant-date per share fair value of stock options granted	$5.58	$5.35	$2.56
Total intrinsic value of stock options exercised	$377	$523	$4
Fair value of restricted shares vested	2,309	1,398	1,236
Tax benefit realized from stock options exercised and restricted stock units ("RSUs") released	954	729	436
Tax benefit recognized in our Consolidated Statements of Operations related to stock-based compensation	$750	$537	$25

StockBased_Compensation_Includ

Stock-Based Compensation Included in Consolidated Statements of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$2,482	$1,614	$1,459
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	234	201	165
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	321	198	242
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$1,927	$1,215	$1,052

WeightedAverage_Assumptions_Us

Weighted-Average Assumptions Used to Determine Fair Value of Stock-Based Awards Granted (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.80%
Risk-free interest rate, minimum		1.10%	0.80%
Risk-free interest rate, maximum		1.80%	1.20%
Expected dividend yield	0.00%	0.00%	0.00%
Expected term	6 years 3 months	6 years 3 months	6 years 6 months
Expected volatility	61.20%
Expected volatility, minimum		60.60%	58.20%
Expected volatility, maximum		61.00%	59.40%
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.10%	0.80%
Risk-free interest rate, minimum			0.10%
Risk-free interest rate, maximum			0.20%
Expected dividend yield	0.00%	0.00%	0.00%
Expected term	6 months	6 months	6 months
Expected volatility, minimum	35.40%	24.50%	40.10%
Expected volatility, maximum	37.80%	31.50%	54.30%

StockBased_Compensation_and_St2

Stock-Based Compensation and Stock-Based Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%
Total unrecognized stock-based compensation	4,000,000
Total unrecognized stock-based compensation recognition period	2 years 2 months 12 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Stock issuance price percentage	100.00%
Contractual term of options granted under the Plans	10 years
Shares available for future grant	994,202
Shares of common stock reserved for future issuance under the Plans	2,306,705
Stock Options | Each year over four years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award granted vesting percentage per year	25.00%
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issuance price percentage	85.00%
Restricted Stock Units | Each year over four years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award granted vesting percentage per year	25.00%
Restricted Stock Units | Each year over two years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award granted vesting percentage per year	50.00%
2000 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares authorized	3,000,000
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares authorized	2,869,600
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Stock issuance price percentage	85.00%
Percentage of employee compensation for purchase of common stock, minimum	2.00%
Percentage of employee compensation for purchase of common stock, maximum	15.00%
Employee contributions for stock purchase, maximum	12,500
Employee Stock Purchase Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares authorized	1,000,000

Stock_Option_Activity_Detail

Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Outstanding, Beginning	1,042,937
Granted, Options Outstanding	90,000
Exercised, Options Outstanding	-148,166
Forfeited, Options Outstanding	-67,992
Options Outstanding, Ending	916,779
Weighted Average Exercise Price, Beginning	$6.52
Granted, Weighted Average Exercise Price	$9.61
Exercised, Weighted Average Exercise Price	$9.90
Forfeited, Weighted Average Exercise Price	$9.01
Weighted Average Exercise Price, Ending	$6.10

Certain_Information_Regarding_1

Certain Information Regarding Options Outstanding (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number, Option Outstanding	916,779	1,042,937
Weighted-average exercise price, Option Outstanding	$6.10	$6.52
Aggregate intrinsic value, Option Outstanding	$7,803,203
Weighted-average remaining contractual term, Option Outstanding	6 years 4 months 17 days
Number, Option Exercisable	555,689
Weighted-average exercise price, Option Exercisable	$5.48
Aggregate intrinsic value, Option Exercisable	$5,071,011
Weighted-average remaining contractual term, Option Exercisable	5 years 4 months 10 days

Summary_of_Restricted_Stock_Un

Summary of Restricted Stock Units Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock Units, Outstanding, Beginning balance	409,403
Granted, Restricted Stock Units	226,400
Vested, Restricted Stock Units	-205,739
Forfeited, Restricted Stock Units	-34,340
Restricted Stock Units, Outstanding, Ending balance	395,724
Weighted Average Grant Date Per Share Fair Value, Beginning balance	$6.87
Granted, Weighted Average Grant Date Per Share Fair Value	$10.47
Vested, Weighted Average Grant Date Per Share Fair Value	$7.04
Forfeited, Weighted Average Grant Date Per Share Fair Value	$6.98
Weighted Average Grant Date Per Share Fair Value, Ending balance	$8.83

Information_Relates_to_Employe

Information Relates to Employee Stock Purchase Plan (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
2013 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued pursuant to the ESPP	70,533
Shares remaining available for purchase, ending balance	929,467
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average price of shares issued	9
Discount per share from the fair market value on the dates of purchase	1.71

Summary_of_Transactions_with_F

Summary of Transactions with FEI (Detail) (FEI Company, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
FEI Company
Related Party Transaction [Line Items]
Equipment and services purchased from FEI	$36	$33	$37
Equipment sold to FEI	5
Due to FEI	10	8
Due from FEI	$0	$0

Summary_of_Transactions_with_R

Summary of Transactions with Raytheon (Detail) (Raytheon, Inc., USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Raytheon, Inc.
Related Party Transaction [Line Items]
Equipment sold to Raytheon	$176	$607	$267
Due from Raytheon	$21	$10

Summary_of_Transactions_with_L

Summary of Transactions with Lam (Detail) (Lam Research Corporation, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2012
Lam Research Corporation
Related Party Transaction [Line Items]
Equipment sold to Lam	$388	$21
Due from Lam	$3

Employee_Benefit_Plan_Addition

Employee Benefit Plan - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employer matching contribution	50.00%
Maximum employee earning contribution in 401(k) plan	3.00%

Employer_Matching_Contribution

Employer Matching Contributions for Savings Plan (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
401(k) matching contributions	$534	$412	$362

Future_Minimum_Lease_Payments_

Future Minimum Lease Payments under Non-Cancelable Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Operating lease
2015	$3,605
2016	2,088
2017	2,085
2018	1,418
2019	1,450
Thereafter	597
Total minimum lease payments	$11,243

Lease_Expense_Detail

Lease Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Lease expense	$2,630	$2,656	$2,575

Restructuring_Charges_Detail

Restructuring Charges (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$1,236	$227
Termination and severance related
Restructuring Cost and Reserve [Line Items]
Restructuring charges	683
Lease abandonment and termination
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$553	$227

Restructuring_Costs_of_Consoli

Restructuring Costs of Consolidated Statements of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring cost	$1,236	$227
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring cost	154
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring cost	$1,082	$227

Charges_Expenditures_WriteOffs

Charges, Expenditures, Write-Offs and Adjustments Related to Restructuring Accruals (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Beginning Accrued Liability	$2,129	$3,034	$4,147
Charged to Expense, Net	1,236	227
Expenditures	-1,406		-1,113
Write-Offs and Adjustments	0		0
Ending Accrued Liability	1,959	2,129	3,034
Termination and severance related
Restructuring Cost and Reserve [Line Items]
Beginning Accrued Liability			10
Charged to Expense, Net	683
Expenditures	-375		-10
Write-Offs and Adjustments	0		0
Ending Accrued Liability	308
Lease abandonment
Restructuring Cost and Reserve [Line Items]
Beginning Accrued Liability	2,129	3,034	4,137
Charged to Expense, Net	553	227
Expenditures	-1,031	-1,132	-1,103
Write-Offs and Adjustments	0	0	0
Ending Accrued Liability	$1,651	$2,129	$3,034

Revenue_and_Operating_Income_I

Revenue and Operating Income Information by Segment (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenue	$136,022	$120,010	$112,963
Gross profit	70,314	54,724	49,951
Gross margin	51.70%	45.60%	44.20%
Income (loss) from operations	13,284	7,333	7,557
Amortization expense	3,011	1,522	1,082
Corporate Unallocated
Segment Reporting Information [Line Items]
Income (loss) from operations	-15,037	-14,029	-12,252
Systems
Segment Reporting Information [Line Items]
Amortization expense		1,200	700
Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	82,850	79,229	74,368
Gross profit	37,775	33,177	29,391
Gross margin	45.60%	41.90%	39.50%
Income (loss) from operations	7,553	9,794	9,651
Probes | Operating Segments
Segment Reporting Information [Line Items]
Revenue	53,172	40,781	38,595
Gross profit	32,539	21,547	20,560
Gross margin	61.20%	52.80%	53.30%
Income (loss) from operations	$20,768	$11,568	$10,158

Segment_Reporting_and_Enterpri2

Segment Reporting and Enterprise-Wide Disclosures - Additional Information (Detail) (Customer Concentration Risk, Total Revenue)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Customer	Customer	Customer
Segment Reporting Information [Line Items]
Number of customers accounted for 10% or greater of our total revenue	0	0	0
Minimum
Segment Reporting Information [Line Items]
Percentage of revenue for specified number of customer in relation to aggregate revenue	10.00%	10.00%	10.00%

Revenues_by_Geographic_Area_De

Revenues by Geographic Area (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$136,022	$120,010	$112,963
U.S.
Segment Reporting Information [Line Items]
Revenues	39,855	37,662	33,445
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	63,660	50,748	51,290
Europe
Segment Reporting Information [Line Items]
Revenues	30,076	28,334	25,718
Other
Segment Reporting Information [Line Items]
Revenues	$2,431	$3,266	$2,510

LongLived_Assets_Exclusive_of_

Long-Lived Assets, Exclusive of Deferred Income Taxes, by Geographic Area (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]
Long-lived assets, exclusive of long-term investments and deferred income taxes	$34,439	$38,925
U.S.
Segment Reporting Information [Line Items]
Long-lived assets, exclusive of long-term investments and deferred income taxes	9,334	8,660
Asia Pacific
Segment Reporting Information [Line Items]
Long-lived assets, exclusive of long-term investments and deferred income taxes	304	339
Europe
Segment Reporting Information [Line Items]
Long-lived assets, exclusive of long-term investments and deferred income taxes	$24,801	$29,926

Stock_Repurchase_Plans_Additio

Stock Repurchase Plans - Additional Information (Detail) (USD $)	3 Months Ended						12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	31-May-14	Nov. 30, 2012	Feb. 28, 2012
Equity, Class of Treasury Stock [Line Items]
Value of common stock authorized for repurchase										$2,000,000
Number of shares repurchased	3,900	22,811	88,445	9,800	59,006	214,087	183,962
Common stock repurchased, weighted-average price	$9.47	$9.45	$9.24	$5.87	$5.60	$4.67	$7.94
Common stock repurchased, value	37,000	216,000	817,000	58,000	332,000	1,000,000	1,070,000	58,000	1,332,000
Maximum
Equity, Class of Treasury Stock [Line Items]
Value of common stock authorized for repurchase											$2,000,000	$1,000,000

Summary_of_Information_Regardi

Summary of Information Regarding Repurchases of Common Stock (Detail) (USD $)	3 Months Ended						12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Common Stock Repurchases [Abstract]
Number of Shares	3,900	22,811	88,445	9,800	59,006	214,087	183,962
Weighted average per share purchase price	$9.47	$9.45	$9.24	$5.87	$5.60	$4.67	$7.94
Total purchase price	$37	$216	$817	$58	$332	$1,000	$1,070	$58	$1,332
Amount remaining for repurchase	$2,540	$2,577	$793	$1,610	$1,668		$2,540		$1,668