Alliance Fiber Optic Products (AFOP) 10-K 13 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 03, 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
Entity Registrant Name	ALLIANCE FIBER OPTIC PRODUCTS INC
Entity Central Index Key	1122342
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		17,817,734
Entity Public Float			$336,565,971
Trading Symbol	AFOP

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$22,723	$18,603
Short-term investments	31,857	28,076
Accounts receivable, net	10,806	11,566
Inventories, net	9,305	10,630
Deferred tax asset, net	3,690	6,036
Prepaid expenses and other current assets	2,077	1,745
Total current assets	80,458	76,656
Long-term investments	10,635	10,453
Property and equipment, net	13,868	13,258
Other assets	212	198
Total assets	105,173	100,565
Current liabilities:
Accounts payable	9,236	11,657
Accrued expenses and other current liabilities	8,699	7,134
Total current liabilities	17,935	18,791
Long-term liabilities:	978	600
Total liabilities	18,913	19,391
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, par value $0.001: 5,000,000 shares authorized; no shares issued and outstanding at December 31, 2014 and 2013, respectively
Common stock, par value $0.001: 100,000,000 shares authorized; 17,942,595 and 18,408,261 shares issued and outstanding at December 31, 2014 and 2013, respectively	18	18
Additional paid-in-capital	111,622	117,369
Accumulated deficit	-26,817	-38,625
Accumulated other comprehensive income	1,437	2,412
Total stockholders' equity	86,260	81,174
Total liabilities and stockholders' equity	$105,173	$100,565

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Consolidated Balance Sheets [Abstract]
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	17,942,595	18,408,261
Common stock, shares outstanding	17,942,595	18,408,261

Consolidated_Statements_of_Inc

Consolidated Statements of Income and Comprehensive Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	$85,987	$76,070	$46,611
Cost of revenues	51,770	46,952	30,617
Gross profit	34,217	29,118	15,994
Operating expenses:
Research and development	4,340	3,702	3,298
Selling, marketing and administrative	8,274	8,315	6,967
Total operating expenses	12,614	12,017	10,265
Income from operations	21,603	17,101	5,729
Interest and other income, net	769	708	727
Income before benefit (provision) for income taxes	22,372	17,809	6,456
Benefit (provision) for income taxes	-7,864	999	3,185
Net income	14,508	18,808	9,641
Foreign currency translation adjustments	-961	-392	792
Net unrealized gain (loss) on investments available for sale	-15	10	1
Comprehensive income	$13,532	$18,426	$10,434
Net income per share:
Basic	$0.78	$1.06	$0.55
Diluted	$0.77	$1.02	$0.54
Shares used in computing net income per share:
Basic	18,488	17,785	17,596
Diluted	18,935	18,481	17,861

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	$14,508	$18,808	$9,641
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,799	2,175	1,609
Amortization of stock-based compensation	2,160	1,917	1,066
Loss on disposal of property and equipment	3	107	13
Provision for (recovery of) inventory valuation	-30	-84	88
Deferred tax assets	2,346	-2,334	-3,702
Changes in assets and liabilities:
Accounts receivable	760	-3,520	-1,416
Inventories	1,355	-3,613	-258
Prepaid expenses and other current assets	-332	-579	-452
Other assets	-14	51	-87
Accounts payable	-2,421	5,066	2,944
Accrued expenses and other current liabilities	1,565	3,019	491
Other long-term liabilities	378	-16	53
Net cash provided by operating activities	23,077	20,997	9,990
Cash flows from investing activities:
Purchase of short-term investments	-35,438	-21,492	-32,140
Proceeds from sales and maturities of short-term investments	31,643	21,908	29,427
Purchase of long-term investments	-182	-179	-176
Purchase of property and equipment	-3,980	-7,830	-1,450
Net cash used in investing activities	-7,957	-7,593	-4,339
Cash flows from financing activities:
Proceeds from issuance of common stock under ESPP	661	521	416
Proceeds from the exercise of stock options	607	5,239	888
Tax payments related to net share settlements of RSUs	501	-1,326	-647
Repurchase of common stock	-9,676	-873	-4,780
Payment of dividends	-2,700	-2,761	-10,960
Repayment of bank borrowings			-230
Net cash (used in) provided by financing activities	-10,607	800	-15,313
Effect of exchange rate changes on cash and cash equivalents	-393	-394	635
Net increase in cash and cash equivalents	4,120	13,810	-9,027
Cash and cash equivalents at beginning of year	18,603	4,793	13,820
Cash and cash equivalents at end of year	22,723	18,603	4,793
Supplemental disclosure of cash flow information:
Cash paid for interest			-4
Cash paid for income taxes	($1,092)	($433)	($450)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Deferred Stock-based Compensation [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, except Share data
Balance at Dec. 31, 2011	$63,614	$18	$112,961	$1,987	($53,353)	$2,001
Balance, shares at Dec. 31, 2011		17,783,000
Deferred stock-based compensation	1,066			1,066
Issuance of stock on exercise of options and RSUs	241		888	-647
Issuance of stock on exercise of options and RSUs, shares		340,000
Issuance of stock purchased through ESPP	416		416
Issuance of stock purchased through ESPP, shares		118,000
Issuance of cash dividends	-10,960				-10,960
Repurchase of common stock	-4,780		-4,780
Repurchase of common stock, shares		-976,000
Net income	9,641				9,641
Other comprehensive gain (loss)	793					793
Balance at Dec. 31, 2012	60,031	18	109,485	2,406	-54,672	2,794
Balance, shares at Dec. 31, 2012		17,265,000
Deferred stock-based compensation	1,917			1,917
Issuance of stock on exercise of options and RSUs	3,913		5,239	-1,326
Issuance of stock on exercise of options and RSUs, shares		1,210,000
Issuance of stock purchased through ESPP	521		521
Issuance of stock purchased through ESPP, shares		92,000
Issuance of cash dividends	-2,761				-2,761
Repurchase of common stock	-873		-873
Repurchase of common stock, shares		-159,000
Net income	18,808				18,808
Other comprehensive gain (loss)	-382					-382
Balance at Dec. 31, 2013	81,174	18	114,372	2,997	-38,625	2,412
Balance, shares at Dec. 31, 2013		18,408,000
Deferred stock-based compensation	2,160			2,160
Issuance of stock on exercise of options and RSUs	1,108		2,491	-1,383
Issuance of stock on exercise of options and RSUs, shares		224,000
Issuance of stock purchased through ESPP	661		661
Issuance of stock purchased through ESPP, shares		51,000
Issuance of cash dividends	-2,700				-2,700
Repurchase of common stock	-9,676		-9,676
Repurchase of common stock, shares		-740,000
Net income	14,508				14,508
Other comprehensive gain (loss)	-975					-975
Balance at Dec. 31, 2014	$86,260	$18	$107,848	$3,774	($26,817)	$1,437
Balance, shares at Dec. 31, 2014		17,943,000

The_Company_and_summary_of_sig

The Company and summary of significant accounting policies	12 Months Ended
	Dec. 31, 2014
The Company and summary of significant accounting policies [Abstract]
The Company and summary of significant accounting policies	1. The Company and summary of significant accounting policies
	The Company
	Alliance Fiber Optic Products, Inc. (the “Company”) was incorporated in California on December 12, 1995 and reincorporated in Delaware on October 19, 2000. The Company designs, manufactures and markets fiber optic components for communications equipment manufacturers. The Company's headquarters are located in Sunnyvale, California, and it has operations in Taiwan and China.
	Use of estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America 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 consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates involve those required in the assessment of the allowance for sales returns, doubtful accounts and/or potential excess obsolete inventory, stock-based compensation and valuation of deferred tax assets. Actual results could differ from those estimates.
	Basis of presentation
	The consolidated financial statements include the accounts of the Company and its subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.
	Foreign currency translation
	The Company's operations through foreign subsidiaries use the local currency as their functional currency. All assets and liabilities of the subsidiaries are translated at rates of exchange as of the balance sheet date. Revenues and expenses are translated at the average rate of exchange for the period. Gains and losses resulting from foreign currency translation are recorded as a separate component of other comprehensive income in stockholders' equity. Foreign currency transaction gains and losses are recorded in interest and other income and have not been material.
	Cash, cash equivalents, short-term and long-term investments
	The Company considers all highly liquid instruments with a maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents consist of cash deposited in money market, certificate of deposit, and checking accounts.
	The Company accounts for its investments under the provisions of Accounting Standards Codification (“ASC”) 320 “Investments - Debt and Equity Securities.” Investments in highly liquid financial instruments with remaining maturities greater than three months and maturities of less than one year are classified as short-term investments. Financial instruments with remaining maturities greater than one year are classified as long-term investments. Investments in related party companies are included in “Other Assets” in the Consolidated Balance Sheets. All investments are classified as available-for-sale and are reported at fair value using the specific identification method with net unrealized gain/(loss) reported, net of tax as other comprehensive gain/(loss) in stockholders' equity. The fair value of the Company's available-for-sale securities are based on quoted market prices or other methodologies for those investments with no quoted market prices at the balance sheet dates.
	The Company's financial instruments also include accounts receivable, accounts payable and debts, and are carried at cost, which approximates the fair value of these instruments.
	Fair value of financial instruments
	The Company applies fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which the Company would transact and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as risks inherent in valuation techniques, transfer restrictions and credit risk. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:
	Level 1 – Quoted prices in active markets for identical assets or liabilities.
	Level 2 – Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 – Inputs that are generally unobservable and typically reflect management's estimate of assumptions that market participants would use in pricing the asset or liability.
	The Company's valuation techniques used to measure the fair value of money market funds and certain marketable equity securities were derived from quoted prices in active markets for identical assets or liabilities.
	In accordance with the fair value accounting requirements, companies may choose to measure eligible financial instruments and certain other items at fair value. The Company has not elected the fair value option for any eligible financial instruments.
	Allowance for doubtful accounts
	The Company performs periodic credit evaluations of its customers' financial condition. The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability or unwillingness of customers to make required payments. When the Company becomes aware that a specific customer is unable to meet its financial obligations, for example, as a result of bankruptcy or deterioration in the customer's operating results or financial position, the Company records a specific allowance to reflect the level of credit risk in the customer's outstanding receivable balance. In addition, the Company records additional allowances based on historical sales returns. The Company is not able to predict changes in the financial condition of customers, and if circumstances related to customers deteriorate, estimates of the recoverability of trade receivables could be materially affected and the Company may be required to record additional allowances. Alternatively, if the Company provides more allowances than the Company needs, the Company may reverse a portion of such provisions in future periods based on actual collection experience.
	Inventories
	Inventories are stated at the lower of cost or market, with cost being determined using standard cost, which approximates actual cost on a first-in, first-out basis. Market value is determined as the lower of replacement cost or net realizable value. We regularly review our inventories for obsolescence and reserves are established when necessary. Provisions are made for excess and obsolete inventory based on historical usage and management's estimates of future demand. Inventory reserves, once established, are only reversed upon sale or disposition of related inventory. Inventory reserves were $2.4 million, $2.4 million and $1.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Property and equipment
	Property and equipment is stated at cost less accumulated depreciation and impairment charges. Depreciation is computed using the straight-line method using estimated useful lives of 25 years for buildings, two to 10 years for machinery and equipment and five years for furniture and fixtures. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the estimated life of the assets, generally two to four years, or the lease term. Depreciation and amortization expenses were $2.8 million, $2.2 million and $1.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Impairment of Long-lived Assets
	The Company reviews its long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Each impairment test is based on a comparison of the undiscounted future cash flows to the recorded value of the asset. If an impairment is indicated, the asset is written down to its estimated fair value based on fair market values.
	Revenue recognition
	The Company recognizes revenue upon shipment of its products to its customers, provided that the Company has received a purchase order, the price is fixed, collection of the resulting receivable is reasonably assured and transfer of title and risk of loss has occurred. Subsequent to the sale of its products, the Company has no obligation to provide any modification or customization upgrades, enhancements or post contract customer support.
	Allowances are provided for estimated returns. A provision for estimated sales return allowances is recorded at the time revenue is recognized based on historical returns, current economic trends and changes in customer demand. Such allowances are adjusted periodically to reflect actual and anticipated experience. Such adjustments, which are recorded against revenue in the period, have generally not been material. The Company accrued $0.08 million, $0.06 million and $0.02 million for warranty reserves as of December 31, 2014, 2013 and 2012, respectively.
	Shipping and handling expenses
	Shipping and handling expenses are included in cost of revenue.
	Research and development expenses
	Research and development costs are charged to expense as incurred.
	Advertising expenses
	Advertising costs are charged to expense as incurred and have not been material in 2014, 2013 and 2012.
	Sales taxes
	The Company accounts for taxes charged to its customers and collected on behalf of taxing authorities on a net basis.
	Income taxes
	The Company accounts for income taxes in accordance with ASC 740 which requires that the Company recognize deferred tax liabilities and assets based on the differences between the financial statement carrying amounts and the tax bases of assets and liabilities, using enacted tax rates in effect in the years the differences are expected to reverse. Deferred income tax benefit (expense) results from the change in net deferred tax assets or deferred tax liabilities. A valuation allowance is recorded when it is more likely than not that some or all deferred tax assets will not be realized.
	The Company applies ASC 740 which utilizes a two-step approach wherein a tax benefit is recognized if a position is more-likely-than-not to be sustained. The amount of the benefit is then measured to be the highest tax benefit that is greater than 50% likely to be realized. The Company has elected to include interest and penalties related to its tax contingencies in income tax expense. The Company files a U.S. federal tax return and a return with the State of California. The Company has determined that its major tax jurisdictions are the United States, California, Taiwan and China.
	The Company follows the provisions of ASC 740-10-25, Income Taxes: Recognition ("ASC 740-10-25"). The total amount of unrecognized tax benefits as of December 31, 2014, 2013 and 2012 were $1.1 million, $0.7 million and $0 respectively. The Company does not anticipate any significant change to its unrecognized tax positions over the next 12 months. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate were $0.4 million, $0.3 million and $0 as of December 31, 2014, 2013 and 2012, respectively. The increase in unrecognized tax benefits during the year ended December 31, 2014 was mainly due to the increase in additional state income tax liabilities. The increase in unrecognized tax benefits during the year ended December 31, 2014 was mainly due to the increase in additional state income tax liabilities. The increase in unrecognized tax benefits during the year ended December 31, 2013 was mainly due to the increase in the valuation of the Company's research credit for federal and state income taxes purposes.
	A reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits for the years ended December 31, 2014 and 2013 are as follows:
	Balance at January 1, 2013	$	-
	Additions for tax positions of the current year		683
	Balance at December 31, 2013	$	683
	Additions for tax positions of the prior year		280
	Additions for tax positions of the current year		117
	Balance at December 31, 2014	$	1,080
	The Company recognizes interest and penalties accrued related to unrecognized tax benefits in the provision for income taxes. During the years ended December 31, 2014, 2013 and 2012, the Company recognized approximately $0.1 million, $0.1 million and $0, respectively, for interest and penalties.
	Deferred tax assets pertaining to windfall tax benefits on the exercise of share awards and the corresponding credit to additional paid-in capital are recorded if the related tax deduction reduces tax payable. The Company has elected the “with-and-without approach excluding indirect tax effects” regarding ordering of windfall tax benefits to determine whether the windfall tax benefit reduced taxes payable in the current year. Under this approach, the windfall tax benefits would be recognized in additional paid-in capital only if an incremental tax benefit is realized after considering all other tax benefits presently available to the Company without considering available income tax credits. The Company's deferred tax assets as of December 31, 2014 and 2013 do not include $.06 million and $1.8 million, respectively, of excess tax benefits from employee stock option exercises that are a component of its net operating loss carryovers. Stockholder's equity will be increased by the same amount if and when such excess tax benefits are ultimately realized.
	The Company files income tax returns in the United States (federal), Taiwan, China and in various state and local jurisdictions. The Company is no longer subject to federal income tax examinations by tax authorities for years prior to 2011, California State and China income tax examination by tax authorities for years prior to 2010, and Taiwan income tax examinations by tax authorities for years prior to 2008. The Company is not currently under examination by any federal, state or local jurisdiction. It is not anticipated that unrecognized tax benefits will significantly change in the next twelve months.
	Stock-based compensation
	The Company estimates the fair value of the share-based payment awards on the date of grant using an option pricing model. The value of awards that are ultimately expected to vest is recognized as an expense over the requisite employee service period.
	Comprehensive income
	Comprehensive income is defined as the change in equity of a company from transactions and other events and circumstances excluding transactions resulting from investments from owners and distributions to owners. Accumulated other comprehensive income consists of cumulative translation adjustments and unrealized gains on short-term investments and is disclosed in the consolidated statements of stockholders' equity.
	Recent accounting pronouncements
	In May 2014, the FASB issued a new financial accounting standard which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes current revenue recognition guidance. The accounting standard is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016. Early adoption is not permitted. The Company is currently evaluating the impact of this accounting standard on its consolidated financial statements.
	In July 2013, the FASB issued guidance on the presentation of an unrecognized tax benefit when a net operating loss carryforward, similar tax loss or tax carryforward exists. The FASB concluded that an unrecognized tax benefit should be presented as a reduction of a deferred tax asset except in certain circumstances the unrecognized tax benefit should be presented as a liability and should not be combined with deferred tax assets. The amendment is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013, with early adoption permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.
	In March 2013, the FASB issued guidance to clarify when to release cumulative foreign currency translation adjustments when an entity ceases to have a controlling financial interest in a subsidiary or group of assets within a foreign entity. The amendment is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013 and should be applied prospectively to derecognition events occurring after the effective date. Early adoption is permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.
	In February 2013, the FASB issued guidance requiring presentation of amounts reclassified from each component of accumulated other comprehensive income. In addition, disclosure is required of the effects of significant reclassifications on income statement line items either on the face of the statement where net income is presented or as a separate disclosure in the notes to the financial statements. For public entities, this guidance is effective prospectively for reporting periods beginning after December 15, 2012. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity [Abstract]
Stockholders' Equity	2. Stockholders' Equity
	Preferred Stock. The Company is authorized to issue 5,000,000 shares of preferred stock, none of which was outstanding as of December 31, 2014. The Board of Directors may determine the rights, preferences and privileges of any preferred stock issued in the future.
	Common Stock. On November 1, 2013, the Company amended its Amended and Restated Certificate of Incorporation to increase the number of shares of common stock authorized for issuance from 20,000,000 to 100,000,000.
	On August 30, 2013, the Company effected a 2-for-1 split of its outstanding common stock, pursuant to previously obtained stockholder authorization. The number of authorized shares of common stock was not changed. The stock split increased the Company's issued and outstanding shares of common stock as of August 30, 2013 from approximately 9,061,568 shares to approximately 18,123,136 shares. All share and per share numbers reflect the split and were applied on a retroactive basis.
	Stock Repurchase Program. On October 29, 2014, the Company announced a program to repurchase up to $15.0 million worth of the Company's outstanding common stock. Repurchases under the program may be made in open market and privately negotiated transactions in compliance with Securities and Exchange Commission Rule 10b-18, subject to market conditions, applicable legal requirements and other factors. The Company is not required to repurchase any amount of common stock in any period and the program may be modified or suspended at any time. The duration of the repurchase program is open-ended. For the year ended December 31, 2014 an aggregate of 740,190 shares of common stock had been repurchased under the program. For the years ended December 31, 2013 and 2012, an aggregate of 158,798 and 976,332 shares of common stock, respectively, had been repurchased under the November 2011 program.
	Dividends. On November 14, 2014, the Company announced it had declared a cash dividend of $0.15 per share, which was payable on December 24, 2014 to holders of record on December 8, 2014. On November 7, 2013, the Company announced it had declared a cash dividend of $0.15 per share, which was payable on December 23, 2013 to holders of record on December 6, 2013. On October 25, 2012, the Company announced it had declared an annual cash dividend of $0.25 per share, and one-time special cash dividend of $1.00 per share, both of which were payable on December 11, 2012 to holders of record on November 30, 2012.
	Stockholder Rights Plan. On March 10, 2011, the Board of Directors entered into an Amended and Restated Rights Agreement (the “Restated Rights Plan”), which amended and restated the original rights agreement dated as of May 29, 2001 (the “Original Agreement”). In connection with the adoption of the Original Agreement, one preferred stock purchase right (a “Right”) was distributed for each outstanding share of common stock. Since the occurrence of a one-for-five reverse split of the common stock at the close of business on August 7, 2010, five Rights had been associated with each outstanding share of common stock. The Restated Rights Plan restores the initial one Right per share of common stock ratio of the Original Agreement, but is also subject to adjustment as provided in the Restated Rights Plan. Rights continue to be attached to all outstanding shares of common stock, and no separate Rights certificates have been distributed.
	Rights will separate from the common stock and a "Distribution Date" will occur upon the earliest of the following: (i) a public announcement that a person, entity or group of affiliated or associated persons and/or entities (an "Acquiring Person") has acquired, or obtained the right to acquire, beneficial ownership of fifteen percent (15%) or more of the outstanding shares of common stock (other than (A) as a result of repurchases of stock by the Company or certain inadvertent actions by institutional or certain other stockholders, (B) the Company, any subsidiary of the Company or any employee benefit plan of the Company or any subsidiary, (C) Foxconn Holding Limited (which owned in excess of fifteen percent (15%) of the outstanding shares of common stock when the Original Agreement was implemented), so long as such entity, together with its affiliated or associated persons and/or entities, does not increase its beneficial ownership by more than one percent (1%) of the outstanding shares of common stock above the percentage held in May 2001 (or such lesser percentage as may result following any transfer of securities after such date until Foxconn beneficially owns less than fifteen percent (15%) of the outstanding shares of common stock)) and (D) certain other instances set forth in the Restated Rights Plan); or (ii) ten (10) business days (unless such date is extended by the Board of Directors) following the commencement of a tender offer or exchange offer which would result in any person, entity or group of affiliated or associated persons and/or entities becoming an Acquiring Person (unless such tender offer or exchange offer is a Permitted Offer as defined in the Restated Rights Plan). As soon as practicable following the Distribution Date, separate certificates evidencing the Rights ("Rights Certificates") will be mailed to holders of record of the common stock as of the close of business on the Distribution Date, and the separate Rights Certificates alone will evidence the Rights.
	The Rights are not exercisable until the Distribution Date. The Rights will expire on the earliest of (i) May 29, 2021, (ii) consummation of a merger transaction with a person, entity or group who (x) acquired common stock pursuant to a Permitted Offer and (y) is offering in the merger the same price per share and form of consideration paid in the Permitted Offer or (iii) redemption or exchange of the Rights by the Company as described in the Amended Rights Plan.

Stockbased_Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2014
Stock-based Compensation [Abstract]
Stock-based Compensation	3. Stock-based Compensation
	ASC 718 requires companies to record compensation expense for stock options measured at fair value on the date of grant, using an option pricing model. The Company adopted the Black Scholes valuation model for stock options granted and stock purchased pursuant to the ESPP after June 30, 2010.
	Fair value for stock options was estimated at the date of grant using the Black-Scholes pricing model, with the following weighted average assumptions:
			Years Ended December 31,
			2014		2013		2012
	Risk-free interest rate		1.02%		0.49%		0.51%
	Time to maturity (in years)		4		4		3
	Annualized volatility		69.67%		30.30%		30.01%
	Expected dividend rate		1.20%		0.98%		10.83%
	At December 31, 2014, the Company had one stock-based compensation plan, the 2000 Stock Incentive Plan (the “Stock Incentive Plan”), which is described below.
	In November 2000, the Company adopted the Stock Incentive Plan under which 300,000 shares of common stock were reserved for issuance to eligible employees, directors and consultants upon exercise of stock options and stock purchase rights. On October 21, 2013, the stockholders approved an increase by 900,000 in the number of shares of common stock available for issuance under the Stock Incentive Plan. The number of shares reserved for issuance under the Company's 2000 Stock Incentive Plan may be increased on the first day of the Company's fiscal year by the lesser of 680,000 shares, 5% of the fully diluted outstanding shares of the Company's common stock on that date or a lesser amount determined by the Company's Board of Directors. There was no increase on January 1, 2014, because the Board determined there were enough shares available for issuance in 2014 pursuant to the Plan. Stock options, restricted stock, restricted stock units (“RSUs”) or stock appreciation rights may be awarded under the 2000 Stock Incentive Plan.
	The plan was amended and restated in 2010 to, among other things, extend the term under which awards may be granted under the plan until March 17, 2020, eliminate a 10 million share ceiling on the aggregate number of shares of common stock that may be issued under the plan, and to include certain qualifying performance criteria and annual award limits so that awards granted under the plan qualify as “performance-based compensation" under the requirements of Section 162(m) of the Internal Revenue Code of 1986, as amended.
	Under the Stock Incentive Plan, participants may be granted RSUs, representing an unfunded, unsecured right to receive common stock on the date specified in the recipient's award. The RSUs granted under the plan generally vest over two years at a rate of 50 percent per year, over three years at a rate of 33.3 percent per year, or over five years at a rate of 20 percent per year. The Company recognizes compensation expense on a straight-line basis over the applicable vesting term of the award.
	During the year ended December 31, 2011, the Company granted 546,000 RSUs with a total grant-date fair value of $2.5 million. The resulting compensation expense recorded in the year ended December 31, 2014 and 2013 was approximately $0.4 million and $0.5 million, respectively. At December 31, 2014, there was $0.5 million of unrecognized compensation cost related to RSUs, which is expected to be realized over two years.
	During the year ended December 31, 2013, the Company granted 342,000 RSUs with a total grant-date fair value of $2.3 million. The resulting compensation expense recorded in the year ended December 31, 2014 and 2013 was approximately $0.8 million and $0.6 million, respectively. At December 31, 2014, there was $0.6 million of unrecognized compensation cost related to RSUs, of which $0.5 million is expected to be realized over one year and $0.1 million is expected to be realized over two years.
	Options granted under the Stock Incentive Plan generally vest over four years and are exercisable for not more than ten years. However, most options granted in the past four years have been fully vested at the time of grant.
	The following information relates to stock option activity for the year ended December 31, 2014:
						Weighted			Average
						Average			Remaining	Aggregate
						Exercise			Contractual	Intrinsic
	Options		Shares			Price			Life	Value
	Outstanding at December 31, 2013		565,640			$	5.28
	Granted		346,600				12.46
	Exercised		(129,140	)			4.71
	Forfeited		(90,000	)			4.45
	Outstanding at December 31, 2014		693,100			$	9.08		8.33 Years	$	3,761,988
	Vested and expected to vest at December 31, 2014		661,872			$	9.04		8.30 Years	$	3,617,550
	Exercisable at December 31, 2014		118,161			$	4.75		5.77 Years	$	1,152,749
	The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the closing stock price on the last trading day of the fourth quarter of fiscal 2013 and 2014 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2014 and 2013. This amount changes based on the fair market value of the Company's common stock. The total intrinsic value of options exercised for the years ended December 31, 2014 and 2013 was $1.3 million and $12.8 million, respectively.
	The dividend rate was 0.15% for each of the years ended December 31, 2014 and 2013, respectively.
	Cash received from option exercises during the year ended December 31, 2014 and 2013 was approximately $0.6 million and $5.2 million, respectively, and is included within the financing activities section in the accompanying consolidated statements of cash flows.
	Information relating to stock options outstanding at December 31, 2014 is as follows:
									Options Outstanding						Options Exercisable
											Weighted
											Average	Weighted					Weighted
		Range of							Number		Remaining	Average			Number	Average
		Exercise							Outstanding		Contractual	Exercise			Exercisable	Exercise
		Price							As of 12/31/14		Term	Price			As of 12/31/14	Price
				$	2.25 -	$4.58			117,800		6.06		$	3.96	59,066		$	4.03
				$	4.80 -	$6.03			55,900		6.85		$	5.01	45,895		$	5.06
				$	6.87 -	$6.87			140,400		8.29		$	6.87	12,600		$	6.87
				$	8.17 -	$8.17			32,400		8.38		$	8.17	600		$	8.17
				$	12.32 -	$12.32			72,200		9.92		$	12.32	-		$	-
				$	12.50 -	$12.50			274,400		9.19		$	12.5	-		$	-
									693,100		8.33		$	9.08	118,161		$	4.75
	Options exercisable as of December 31, 2014 and 2013 were 118,161 and 115,400 at an average exercise price of $4.75 and $4.01 per share, respectively.
	There were 733,924 shares available for future issuance under the Stock Incentive Plan as of December 31, 2014.
	Employee Stock Purchase Plan
	In November 2000, the Company adopted its ESPP. The Company reserved 600,000 shares of common stock for issuance under the ESPP. The ESPP was amended and restated in 2010. On April 29, 2011, the stockholders approved an increase by 600,000 in the number of shares of common stock available for issuance. On the first day of January of each year beginning January 1, 2001 through December 31, 2010, additional shares of common stock were reserved for issuance under the ESPP as determined by the Board of Directors. The ESPP limited the annual increase to the lesser of 1% of the Company's issued and outstanding common stock or 400,000 shares. The ESPP provides eligible employees with the opportunity to acquire shares of common stock at a price of 85% of the lower of the fair market value of the common stock on the first day of the offering period or the last day of the offering period, whichever is lower. The ESPP is structured as a qualified employee stock purchase plan under Section 423 of the Internal Revenue Code of 1986, as amended. However, the ESPP is not intended to be a qualified pension, profit sharing or stock bonus plan under Section 401(a) of the 1986 Code and is not subject to the provisions of the Employee Retirement Security Act of 1974. The Board may amend, suspend, or terminate the Plan at any time without notice. A total of 50,759 and 92,111 shares were issued under the ESPP in 2014 and 2013, respectively.
	There were 268,141 shares available for future issuance under the ESPP as of December 31, 2014.
	The following information relates to the ESPP:
				2014			2013			2012
	Weighted average fair value per share of shares purchased			$	13.01		$	5.66		$	7.07
	Total compensation expense for ESPP			$	461,980		$	409,079		$	139,595
	Total amount of cash received from the purchase of stock through ESPP			$	660,621		$	521,308		$	416,741
	Total intrinsic value of ESPP stock purchased at December 31			$	75,892		$	863,120		$	291,958
	The following table summarizes employee stock-based compensation expense resulting from stock options, RSUs, and the ESPP (in thousands):
				Years Ended December 31,
				2014			2013					2012
	Included in cost of revenue			$	491		$	373				$	119
	Included in operating expenses:
	Research and development				234			232					125
	Sales, marketing and administrative				1,435			1,312					822
	Total				1,669			1,544					947
Total stock-based compensation expenses			$	2,160		$	1,917				$	1,066

Net_Income_per_Share

Net Income per Share	12 Months Ended
	Dec. 31, 2014
Net Income Per Share [Abstract]
Net Income Per Share	4. Net Income per Share
	Basic net income per share is computed by dividing net income for the period by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed by dividing the net income for the period by the combination of dilutive common share equivalents, comprised of shares issuable under the Company's stock-based compensation plans, and the weighted average number of common shares outstanding during the period. There were no incremental dilutive common share equivalents in the periods presented.
	The following table sets forth the computation of basic and diluted net income per share for the years indicated (in thousands, except per share amounts):
		Years Ended December 31,
		2014		2013		2012
	Numerator:
	Net income	$	14,508	$	18,808	$	9,641
	Denominator:
	Shares used in computing net income per share:
	Weighted average of common shares outstanding
	Basic		18,488		17,785		17,596
	Diluted		18,935		18,481		17,861
	Net income per share:
	Basic	$	0.78	$	1.06	$	0.55
	Diluted	$	0.77	$	1.02	$	0.54

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components [Abstract]
Balance Sheet Components	5. Balance Sheet Components (in thousands)
		December 31,
		2014			2013
	Cash and cash equivalents:
	Cash	$	18,653		$	17,676
	Money market instruments and funds		4,070			927
		$	22,723		$	18,603
	Accounts receivable, net:
	Accounts receivable	$	10,927		$	11,687
	Less: Allowance for doubtful accounts and sales returns		(121	)		(121	)
		$	10,806		$	11,566
	Allowance for doubtful accounts and sales returns:
	Balance at beginning of year	$	121		$	121
	Utilized		-			-
	Balance at end of year	$	121		$	121
	Inventories:
	Finished goods	$	3,191		$	3,201
	Work-in-process		3,430			4,498
	Raw materials		5,052			5,330
		$	11,673		$	13,029
	Inventory reserves:
	Finished goods	$	647		$	746
	Work-in-process		460			364
	Raw materials	$	1,261		$	1,289
		$	2,368		$	2,399
	Accrued expenses and other current liabilities:
	Compensation costs	$	5,016		$	5,104
	Professional fees		55			38
	Outside commissions		143			112
	Royalties		135			74
	ESPP		138			151
	Deferred rent		33			57
	Warranty		82			57
	Operating related (Taiwan and China)		417			289
	Income tax		2,204			890
	Others		476			362
		$	8,699		$	7,134
	Long-term liabilities:
	Income tax payable	$	376		$	-
	Accrued pension liability (Taiwan)		602			600
		$	978		$	600
	Accumulated other comprehensive Income:
	Cumulative translation adjustments	$	1,447		$	2,408
	Unrealized gain/(loss) on short-term investments		(10	)		4
		$	1,437		$	2,412

Property_and_Equipment_Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2014
Property and Equipment, Net [Abstract]
Property and Equipment, Net	6. Property and Equipment, Net
		December 31,
	(in thousands)	2014			2013
	Machinery and equipment	$	21,685		$	20,696
	Furniture and fixtures		686			673
	Leasehold improvements		1,285			986
	Building and equipment prepayments		3,804			2,948
		$	27,460		$	25,303
	Less: Accumulated depreciation		(13,592	)		(12,045	)
	Total property and equipment, net	$	13,868		$	13,258

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]
Income Taxes	7. Income Taxes
	The components of income before income taxes are as follows (in thousands):
				Years Ended December 31,
				2014				2013				2012
	Income subject to domestic income taxes only			$	8,608			$	17,645			$	4,000
	Income subject to foreign income taxes only				13,764				164				2,456
				$	22,372			$	17,809			$	6,456
	The income tax provision (benefit) is composed of the following (in thousands):
				Years Ended December 31,
	Current:			2014				2013					2012
	Federal			$	2,663			$	382				$	107
	State				75				1					-
	Foreign				2,403				953					409
					5,141				1,336					516
	Deferred:
	Federal				1,891				(1,450	)				(3,160	)
	State				763				(232	)				(541	)
	Foreign				69				(653	)				-
					2,723				(2,335	)				(3,701	)
	Total provision (benefit) for income taxes			$	7,864			$	(999	)			$	(3,185	)
	Deferred tax assets and liabilities consist of the following (in thousands):
			Years Ended December 31,
			2014				2013				2012
	Deferred tax assets - current:
	Net operating loss carryforwards		$	-			$	3,501			$	8,230
	Windfall tax benefit carryforwards			-				(580	)			-
	Federal/State credit carryforwards			2,536				2,260				2,245
	Depreciation and amortization			24				6				-
	Stock compensation			326				-				649
	Accrued liabilities and allowances			1,508				1,532				788
	Unrecognized tax benefit			(704	)			(683	)			-
				3,690				6,036				11,912
	Less: valuation allowance			-				-				(8,210	)
	Total deferred tax assets		$	3,690			$	6,036			$	3,702
	The following is a reconciliation of the effective tax rates and the United States statutory federal income tax rate:
		Years Ended December 31,
		2014			2013			2012
	Tax at federal statutory rate	34	%		34	%		34	%
	State, net of federal benefit	5.8			5.8			5.8
	Effect of permanent differences	3.8			1.1			-
	Stock and deferred compensation	0.9			(7.2	)		(0.8	)
	Net operating loss carryover	5.6			-			-
	Foreign tax differential	(13.1	)		0.1			4.4
	Reserarch and development credits	-			-			(1.1	)
	Minimum tax	0.6			1.7			1.4
	Income tax credits	(1.9	)		(0.9	)		(0.3	)
	Valuation allowance	-			(47.4	)		(88.7	)
	Unrecognized tax position	2.1			2.3			-
	Other	(2.6	)		4.9			(4.0	)
	Provision (benefit) for taxes	35.2	%		(5.6	)%		(49.3	)%
	The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
	The Company's effective tax rate was below the U.S. statutory rate in 2014 mainly due to differentials between the U.S. statutory rate and the foreign tax rates applied to the earnings of the Company's foreign subsidiaries. The Company's effective tax rate was below the U.S. statutory rate in 2013 and 2012 because of the tax benefit arising from a reduction in the valuation allowance. The Company is subject to income tax in both the United States and various foreign jurisdictions. The effective tax rate is also affected by the taxable earnings in foreign jurisdictions with various different statutory tax rates. The Company reviews its expected annual effective income tax rates and makes changes on a quarterly basis as necessary based on certain factors such as forecasted annual operating income and valuation of deferred tax assets.
	The Company records net deferred tax assets to the extent it believes these assets will more likely than not be realized. In making such determination, management considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial operations. In the event the Company was to determine that it would be able to realize its deferred income tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the valuation allowance, which would reduce the provision for income taxes.
	Management assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to utilize the existing deferred tax assets. Based on this assessment, as of December 31, 2014, the Company's valuation allowance was fully released. The amount of the deferred tax asset considered realizable, however, could be adjusted if estimates of future taxable income are reduced.
	As of December 31, 2014, the Company has a net operating loss carryforward of approximately $0.9 million for federal and $5.2 million for state income tax purposes. If not utilized, these carryforwards will begin to expire after 2024 for federal and after 2018 for state purposes.
	As of December 31, 2014, the Company has research credit carryforwards of approximately $1.2 million and $1.0 million for federal and state income tax purposes, respectively. If not utilized, the federal carryforwards will expire in various amounts beginning in 2019. The California tax credits can be carried forward indefinitely.
	Internal Revenue Code Section 382 limits the use of net operating loss and tax credit carryforwards in certain situations where changes occur in the stock ownership of a company. In the event the Company has had a change in ownership, utilization of the carryforwards could be restricted. The Company has concluded no change in stock ownership has occurred during 2014.

Concentrations_of_Certain_Risk

Concentrations of Certain Risks	12 Months Ended
	Dec. 31, 2014
Concentrations of Certain Risks [Abstract]
Concentrations of Certain Risks	8. Concentrations of Certain Risks
	Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, short-term and long-term investments and accounts receivable. The Company limits the amount of deposits in any one financial institution and any one financial instrument. The Company invests its excess cash principally in certificates of deposit, debt instruments issued by high-credit quality financial institutions and corporations and money market accounts with financial institutions in the United States.
	The Company performs periodic credit evaluations of its customers' financial condition, and limits the amount of credit extended when deemed necessary, but generally does not require collateral.
	One customer accounted for 26.9% of the Company's accounts receivable at December 31, 2014. Two customers accounted for 46.0% and 18.0% of the Company's accounts receivable at December 31, 2013 and 2012, respectively.
	One customer accounted for 39.6% and 35.3%, and another customer accounted for 10%, of revenues in the year ended December 31, 2014, 2013 and 2012, respectively.
	Certain components used in manufacturing the Company's products have relatively few alternative sources of supply, and establishing additional or replacement suppliers for such components may not be accomplished quickly.

Geographic_Segment_Information

Geographic Segment Information	12 Months Ended
	Dec. 31, 2014
Geographic Segment Information [Abstract]
Geographic Segment Information	9. Geographic Segment Information
	The Company operates in a single industry segment. This industry segment is characterized by rapid technological change and significant competition.
	The following is a summary of the Company's revenues generated by geographic segments, revenues generated by product lines and identifiable assets located in these segments (in thousands):
		Years Ended December 31,
		2014		2013		2012
	Revenues
	North America	$	52,101	$	42,815	$	27,299
	Europe		18,102		15,604		8,933
	Asia		15,784		17,651		10,379
		$	85,987	$	76,070	$	46,611
		Years Ended December 31,
			2014		2013		2012
	Revenues
	Connectivity Products	$	64,791	$	57,660	$	32,622
	Optical Passive Products		21,196		18,410		13,989
		$	85,987	$	76,070	$	46,611
		Years Ended December 31,
		2014		2013
	Property and Equipment, net
	United States	$	185	$	40
	Taiwan		8,568		7,148
	China		5,115		6,070
		$	13,868	$	13,258

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies
	Litigation
	From time to time, the Company may be involved in litigation in the normal course of business. As of the date of these financial statements, the Company is not aware of any material legal proceedings pending or threatened against the Company.
	Off-Balance Sheet Arrangements
	The Company had no off-balance sheet arrangements as of December 31, 2014 or 2013, respectively.
	Indemnification and Product Warranty
	The Company indemnifies certain customers, suppliers and subcontractors for attorney fees and damages and costs awarded against these parties in certain circumstances in which products are alleged to infringe third party intellectual property rights, including patents, trade secrets, trademarks or copyrights. In all cases, there are limits on and exceptions to the potential liability for indemnification relating to intellectual property infringement claims. The Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. As of December 31, 2014, the Company has not paid any claim or been required to defend any action related to indemnification obligations, and accordingly, the Company has not accrued any amounts for such indemnification obligations. However, the Company may record charges in the future as a result of these indemnification obligations.
	The Company generally warrants products against defects in materials and workmanship and non-conformance to specifications for varying lengths of time. If there is a material increase in customer claims compared with historical experience, or if costs of servicing warranty claims are greater than expected, the Company may record a charge against cost of revenues. The Company accrued $0.08 million, $0.06 million and $0.02 million warranty reserves as of December 31, 2014, 2013 and 2012, respectively
	Operating Leases
	The Company leases certain office space under long-term operating leases expiring at various dates through 2019. Total rent expense under these operating leases was approximately $0.7 million for each of the years ended December 31, 2014, 2013 and 2012.
	Total future minimum lease payments under operating leases as of December 31, 2014 are summarized below (in thousands):
	Years ending December 31,
	2015	$	972
	2016		701
	2017		452
	2018		446
	2019 and after		391
	Total	$	2,962

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	11. Related Party Transactions
	As of December 31, 2014, and based on information filed with the Securities and Exchange Commission on January 4, 2002 for the year ended December 31, 2000, Foxconn Holding Limited (“Foxconn”) and Hon Hai Precision Industry Co. Ltd. (“Hon Hai”) held 17.83% of the Company's common stock. In the normal course of business, the Company sells products to and purchases raw materials from Hon Hai, who is the parent company of Foxconn. These transactions were made at prices and terms consistent with those of unrelated third parties.
	Sales of products to Hon Hai Precision Co., Ltd. were $0.07 million, $0.01 million and $0.06 million in the years ended December 31, 2014, 2013 and 2012, respectively. Amounts due from Hon Hai Precision Co., Ltd. were $0.05 million, $0.01 million and $0 at December 31, 2014, 2013 and 2012, respectively.
	Purchases of raw materials from Hon Hai Precision Co., Ltd. were $1.8 million, $1.5 million and $1.0 million in the years ended December 31, 2014, 2013 and 2012 respectively. Amounts due to Hon Hai Precision Co., Ltd. were $0.4 million, $0.3 million and $0.3 million at December 31, 2014, 2013 and 2012.

Fair_Value_of_Financial_instru

Fair Value of Financial instruments	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial instruments [Abstract]
Fair Value of Financial instruments	12. Fair Value of Financial instruments
	U.S. GAAP defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers the principal or most advantageous market in which the Company would transact a purchase or sale and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability.
	The Company uses a fair value hierarchy established by U.S. GAAP that established a three-tiered fair value hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable to prioritize inputs used to measure fair value. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company's market assumptions. A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is available and significant to the fair value measurement. Those tiers are defined as follows:
		Level 1 —	inputs are quoted prices in active markets for identical assets or liabilities.
		Level 2 —	inputs other than quoted prices included within Level 1 that are observable, either directly or indirectly.
		Level 3 —	inputs are unobservable and shall be used to the extent that observable inputs are not available in the overall fair value measurement.
	The following table represents the fair value hierarchy for the Company's financial assets (investments) measured at fair value on a recurring basis at December 31, 2014 and December 31, 2013 (in thousands):
				Fair Value Measurements at
				Reporting Date Using
						Quoted Prices			Significant
						in Active			Other			Significant
				Balance at		Markets for			Observable			Unobservable
				December 31,		Identical Assets			Inputs			Inputs
				2014		(Level 1)			(Level 2)			(Level 3)
	Cash equivalents:
	Money market mutual funds			$	4,070	$	4,070		$	-	$		-
	Marketable Securities:
	Time deposits				21,782		21,782			-			-
	Corporate bonds				10,075		-			10,075			-
	Long-term investments:
	Time deposits				10,635		10,635			-			-
	Total			$	46,562	$	36,487		$	10,075	$		-
				Fair Value Measurements at
				Reporting Date Using
						Quoted Prices			Significant
						in Active			Other			Significant
				Balance at		Markets for			Observable			Unobservable
				December 31,		Identical Assets			Inputs			Inputs
					2013		(Level 1	)		(Level 2)			(Level 3	)
	Cash equivalents:
	Money market mutual funds			$	927	$	927		$	-	$		-
	Short-term investments:
	Time deposits				15,065		15,065			-			-
	Corporate bonds				13,011		-			13,011			-
	Long-term investments:
	Time deposits				10,453		10,453			-			-
	Total			$	39,456	$	26,445		$	13,011	$		-
	As of December 31, 2014 and 2013, the Company held investments in corporate bonds, certificates of deposit, and money market securities. The Company's cash and cash equivalents consist of investments with original maturities of 90 days or less from the date of purchase. The Company's short-term investments consist of corporate bonds and certificates of deposit with original maturities of 91 days or more from the date of purchase. The Company's long-term investments are comprised of certificates of deposit with original maturities of 365 days or more from the date of purchase.

Selected_Quarterly_Data

Selected Quarterly Data	12 Months Ended
	Dec. 31, 2014
Selected Quarterly Data [Abstract]
Selected Quarterly Data	13. Selected Quarterly Data (Unaudited)
	The following table presents summary unaudited quarterly financial data (in thousands, except per share data):
		First		Second		Third		Fourth
		Quarter		Quarter		Quarter		Quarter
	2014
	Revenues, net	$	24,882	$	24,199	$	18,096	$	18,810
	Gross profit		9,914		9,695		7,139		7,469
	Net income		5,015		3,782		4,303		1,408
	Net income per share - basic		0.27		0.2		0.23		0.08
	Net income per share - diluted		0.26		0.2		0.23		0.08
	2013
	Revenues, net	$	12,153	$	19,039	$	23,074	$	21,804
	Gross profit		4,408		7,280		8,856		8,574
	Net income		1,850		4,282		5,621		7,055
	Net income per share - basic		0.11		0.24		0.31		0.38
	Net income per share - diluted		0.1		0.23		0.3		0.37

The_Company_and_summary_of_sig1

The Company and summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2014
The Company and summary of significant accounting policies [Abstract]
Use of estimates	Use of estimates
	The preparation of consolidated financial statements in accordance with accounting principles generally accepted in the United States of America 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 consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates involve those required in the assessment of the allowance for sales returns, doubtful accounts and/or potential excess obsolete inventory, stock-based compensation and valuation of deferred tax assets. Actual results could differ from those estimates.
Basis of presentation	Basis of presentation
	The consolidated financial statements include the accounts of the Company and its subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.
Foreign currency translation	Foreign currency translation
	The Company's operations through foreign subsidiaries use the local currency as their functional currency. All assets and liabilities of the subsidiaries are translated at rates of exchange as of the balance sheet date. Revenues and expenses are translated at the average rate of exchange for the period. Gains and losses resulting from foreign currency translation are recorded as a separate component of other comprehensive income in stockholders' equity. Foreign currency transaction gains and losses are recorded in interest and other income and have not been material.
Cash, cash equivalents, short-term and long-term investments	Cash, cash equivalents, short-term and long-term investments
	The Company considers all highly liquid instruments with a maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents consist of cash deposited in money market, certificate of deposit, and checking accounts.
	The Company accounts for its investments under the provisions of Accounting Standards Codification (“ASC”) 320 “Investments - Debt and Equity Securities.” Investments in highly liquid financial instruments with remaining maturities greater than three months and maturities of less than one year are classified as short-term investments. Financial instruments with remaining maturities greater than one year are classified as long-term investments. Investments in related party companies are included in “Other Assets” in the Consolidated Balance Sheets. All investments are classified as available-for-sale and are reported at fair value using the specific identification method with net unrealized gain/(loss) reported, net of tax as other comprehensive gain/(loss) in stockholders' equity. The fair value of the Company's available-for-sale securities are based on quoted market prices or other methodologies for those investments with no quoted market prices at the balance sheet dates.
	The Company's financial instruments also include accounts receivable, accounts payable and debts, and are carried at cost, which approximates the fair value of these instruments.
Fair value of financial instruments	Fair value of financial instruments
	The Company applies fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which the Company would transact and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as risks inherent in valuation techniques, transfer restrictions and credit risk. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:
	Level 1 – Quoted prices in active markets for identical assets or liabilities.
	Level 2 – Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 – Inputs that are generally unobservable and typically reflect management's estimate of assumptions that market participants would use in pricing the asset or liability.
	The Company's valuation techniques used to measure the fair value of money market funds and certain marketable equity securities were derived from quoted prices in active markets for identical assets or liabilities.
	In accordance with the fair value accounting requirements, companies may choose to measure eligible financial instruments and certain other items at fair value. The Company has not elected the fair value option for any eligible financial instruments.
Allowance for doubtful accounts	Allowance for doubtful accounts
	The Company performs periodic credit evaluations of its customers' financial condition. The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability or unwillingness of customers to make required payments. When the Company becomes aware that a specific customer is unable to meet its financial obligations, for example, as a result of bankruptcy or deterioration in the customer's operating results or financial position, the Company records a specific allowance to reflect the level of credit risk in the customer's outstanding receivable balance. In addition, the Company records additional allowances based on historical sales returns. The Company is not able to predict changes in the financial condition of customers, and if circumstances related to customers deteriorate, estimates of the recoverability of trade receivables could be materially affected and the Company may be required to record additional allowances. Alternatively, if the Company provides more allowances than the Company needs, the Company may reverse a portion of such provisions in future periods based on actual collection experience.
Inventories	Inventories
	Inventories are stated at the lower of cost or market, with cost being determined using standard cost, which approximates actual cost on a first-in, first-out basis. Market value is determined as the lower of replacement cost or net realizable value. We regularly review our inventories for obsolescence and reserves are established when necessary. Provisions are made for excess and obsolete inventory based on historical usage and management's estimates of future demand. Inventory reserves, once established, are only reversed upon sale or disposition of related inventory. Inventory reserves were $2.4 million, $2.4 million and $1.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Property and equipment	Property and equipment
	Property and equipment is stated at cost less accumulated depreciation and impairment charges. Depreciation is computed using the straight-line method using estimated useful lives of 25 years for buildings, two to 10 years for machinery and equipment and five years for furniture and fixtures. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the estimated life of the assets, generally two to four years, or the lease term. Depreciation and amortization expenses were $2.8 million, $2.2 million and $1.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Impairment of Long-lived Assets	Impairment of Long-lived Assets
	The Company reviews its long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Each impairment test is based on a comparison of the undiscounted future cash flows to the recorded value of the asset. If an impairment is indicated, the asset is written down to its estimated fair value based on fair market values.
Revenue recognition	Revenue recognition
	The Company recognizes revenue upon shipment of its products to its customers, provided that the Company has received a purchase order, the price is fixed, collection of the resulting receivable is reasonably assured and transfer of title and risk of loss has occurred. Subsequent to the sale of its products, the Company has no obligation to provide any modification or customization upgrades, enhancements or post contract customer support.
	Allowances are provided for estimated returns. A provision for estimated sales return allowances is recorded at the time revenue is recognized based on historical returns, current economic trends and changes in customer demand. Such allowances are adjusted periodically to reflect actual and anticipated experience. Such adjustments, which are recorded against revenue in the period, have generally not been material. The Company accrued $0.08 million, $0.06 million and $0.02 million for warranty reserves as of December 31, 2014, 2013 and 2012, respectively.
Shipping and handling expenses	Shipping and handling expenses
	Shipping and handling expenses are included in cost of revenue.
Research and development expenses	Research and development expenses
	Research and development costs are charged to expense as incurred.
Advertising expenses	Advertising expenses
	Advertising costs are charged to expense as incurred and have not been material in 2014, 2013 and 2012.
Sales taxes	Sales taxes
	The Company accounts for taxes charged to its customers and collected on behalf of taxing authorities on a net basis.
Income taxes	Income taxes
	The Company accounts for income taxes in accordance with ASC 740 which requires that the Company recognize deferred tax liabilities and assets based on the differences between the financial statement carrying amounts and the tax bases of assets and liabilities, using enacted tax rates in effect in the years the differences are expected to reverse. Deferred income tax benefit (expense) results from the change in net deferred tax assets or deferred tax liabilities. A valuation allowance is recorded when it is more likely than not that some or all deferred tax assets will not be realized.
	The Company applies ASC 740 which utilizes a two-step approach wherein a tax benefit is recognized if a position is more-likely-than-not to be sustained. The amount of the benefit is then measured to be the highest tax benefit that is greater than 50% likely to be realized. The Company has elected to include interest and penalties related to its tax contingencies in income tax expense. The Company files a U.S. federal tax return and a return with the State of California. The Company has determined that its major tax jurisdictions are the United States, California, Taiwan and China.
	The Company follows the provisions of ASC 740-10-25, Income Taxes: Recognition ("ASC 740-10-25"). The total amount of unrecognized tax benefits as of December 31, 2014, 2013 and 2012 were $1.1 million, $0.7 million and $0 respectively. The Company does not anticipate any significant change to its unrecognized tax positions over the next 12 months. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate were $0.4 million, $0.3 million and $0 as of December 31, 2014, 2013 and 2012, respectively. The increase in unrecognized tax benefits during the year ended December 31, 2014 was mainly due to the increase in additional state income tax liabilities. The increase in unrecognized tax benefits during the year ended December 31, 2014 was mainly due to the increase in additional state income tax liabilities. The increase in unrecognized tax benefits during the year ended December 31, 2013 was mainly due to the increase in the valuation of the Company's research credit for federal and state income taxes purposes.
	A reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits for the years ended December 31, 2014 and 2013 are as follows:
	Balance at January 1, 2013	$	-
	Additions for tax positions of the current year		683
	Balance at December 31, 2013	$	683
	Additions for tax positions of the prior year		280
	Additions for tax positions of the current year		117
	Balance at December 31, 2014	$	1,080
	The Company recognizes interest and penalties accrued related to unrecognized tax benefits in the provision for income taxes. During the years ended December 31, 2014, 2013 and 2012, the Company recognized approximately $0.1 million, $0.1 million and $0, respectively, for interest and penalties.
	Deferred tax assets pertaining to windfall tax benefits on the exercise of share awards and the corresponding credit to additional paid-in capital are recorded if the related tax deduction reduces tax payable. The Company has elected the “with-and-without approach excluding indirect tax effects” regarding ordering of windfall tax benefits to determine whether the windfall tax benefit reduced taxes payable in the current year. Under this approach, the windfall tax benefits would be recognized in additional paid-in capital only if an incremental tax benefit is realized after considering all other tax benefits presently available to the Company without considering available income tax credits. The Company's deferred tax assets as of December 31, 2014 and 2013 do not include $.06 million and $1.8 million, respectively, of excess tax benefits from employee stock option exercises that are a component of its net operating loss carryovers. Stockholder's equity will be increased by the same amount if and when such excess tax benefits are ultimately realized.
	The Company files income tax returns in the United States (federal), Taiwan, China and in various state and local jurisdictions. The Company is no longer subject to federal income tax examinations by tax authorities for years prior to 2011, California State and China income tax examination by tax authorities for years prior to 2010, and Taiwan income tax examinations by tax authorities for years prior to 2008. The Company is not currently under examination by any federal, state or local jurisdiction. It is not anticipated that unrecognized tax benefits will significantly change in the next twelve months.
Stock-based compensation	Stock-based compensation
	The Company estimates the fair value of the share-based payment awards on the date of grant using an option pricing model. The value of awards that are ultimately expected to vest is recognized as an expense over the requisite employee service period.
Comprehensive income	Comprehensive income
	Comprehensive income is defined as the change in equity of a company from transactions and other events and circumstances excluding transactions resulting from investments from owners and distributions to owners. Accumulated other comprehensive income consists of cumulative translation adjustments and unrealized gains on short-term investments and is disclosed in the consolidated statements of stockholders' equity.
Recent accounting pronouncements	Recent accounting pronouncements
	In May 2014, the FASB issued a new financial accounting standard which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes current revenue recognition guidance. The accounting standard is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016. Early adoption is not permitted. The Company is currently evaluating the impact of this accounting standard on its consolidated financial statements.
	In July 2013, the FASB issued guidance on the presentation of an unrecognized tax benefit when a net operating loss carryforward, similar tax loss or tax carryforward exists. The FASB concluded that an unrecognized tax benefit should be presented as a reduction of a deferred tax asset except in certain circumstances the unrecognized tax benefit should be presented as a liability and should not be combined with deferred tax assets. The amendment is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013, with early adoption permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.
	In March 2013, the FASB issued guidance to clarify when to release cumulative foreign currency translation adjustments when an entity ceases to have a controlling financial interest in a subsidiary or group of assets within a foreign entity. The amendment is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013 and should be applied prospectively to derecognition events occurring after the effective date. Early adoption is permitted. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.
	In February 2013, the FASB issued guidance requiring presentation of amounts reclassified from each component of accumulated other comprehensive income. In addition, disclosure is required of the effects of significant reclassifications on income statement line items either on the face of the statement where net income is presented or as a separate disclosure in the notes to the financial statements. For public entities, this guidance is effective prospectively for reporting periods beginning after December 15, 2012. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

The_Company_and_summary_of_sig2

The Company and summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2014
The Company and summary of significant accounting policies [Abstract]
Reconciliation of Unrecognized Tax Benefits	Balance at January 1, 2013	$	-
	Additions for tax positions of the current year		683
	Balance at December 31, 2013	$	683
	Additions for tax positions of the prior year		280
	Additions for tax positions of the current year		117
	Balance at December 31, 2014	$	1,080

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Stock-based Compensation [Abstract]
Schedule of Weighted Average Assumptions			Years Ended December 31,
			2014		2013		2012
	Risk-free interest rate		1.02%		0.49%		0.51%
	Time to maturity (in years)		4		4		3
	Annualized volatility		69.67%		30.30%		30.01%
	Expected dividend rate		1.20%		0.98%		10.83%
Schedule of Stock Options Activity	The following information relates to stock option activity for the year ended December 31, 2014:
						Weighted			Average
						Average			Remaining	Aggregate
						Exercise			Contractual	Intrinsic
	Options		Shares			Price			Life	Value
	Outstanding at December 31, 2013		565,640			$	5.28
	Granted		346,600				12.46
	Exercised		(129,140	)			4.71
	Forfeited		(90,000	)			4.45
	Outstanding at December 31, 2014		693,100			$	9.08		8.33 Years	$	3,761,988
	Vested and expected to vest at December 31, 2014		661,872			$	9.04		8.30 Years	$	3,617,550
	Exercisable at December 31, 2014		118,161			$	4.75		5.77 Years	$	1,152,749
Schedule of Information Relating to Stock Options Outstanding	Information relating to stock options outstanding at December 31, 2014 is as follows:
									Options Outstanding						Options Exercisable
											Weighted
											Average	Weighted					Weighted
		Range of							Number		Remaining	Average			Number	Average
		Exercise							Outstanding		Contractual	Exercise			Exercisable	Exercise
		Price							As of 12/31/14		Term	Price			As of 12/31/14	Price
				$	2.25 -	$4.58			117,800		6.06		$	3.96	59,066		$	4.03
				$	4.80 -	$6.03			55,900		6.85		$	5.01	45,895		$	5.06
				$	6.87 -	$6.87			140,400		8.29		$	6.87	12,600		$	6.87
				$	8.17 -	$8.17			32,400		8.38		$	8.17	600		$	8.17
				$	12.32 -	$12.32			72,200		9.92		$	12.32	-		$	-
				$	12.50 -	$12.50			274,400		9.19		$	12.5	-		$	-
									693,100		8.33		$	9.08	118,161		$	4.75
Schedule of Information relating to the ESPP	The following information relates to the ESPP:
				2014			2013			2012
	Weighted average fair value per share of shares purchased			$	13.01		$	5.66		$	7.07
	Total compensation expense for ESPP			$	461,980		$	409,079		$	139,595
	Total amount of cash received from the purchase of stock through ESPP			$	660,621		$	521,308		$	416,741
	Total intrinsic value of ESPP stock purchased at December 31			$	75,892		$	863,120		$	291,958
Schedule of Employee Stock-Based Compensation Expense	The following table summarizes employee stock-based compensation expense resulting from stock options, RSUs, and the ESPP (in thousands):
				Years Ended December 31,
				2014			2013					2012
	Included in cost of revenue			$	491		$	373				$	119
	Included in operating expenses:
	Research and development				234			232					125
	Sales, marketing and administrative				1,435			1,312					822
	Total				1,669			1,544					947
	Total stock-based compensation expenses			$	2,160		$	1,917				$	1,066

Net_Income_per_Share_Tables

Net Income per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Net Income Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Income Per Share	The following table sets forth the computation of basic and diluted net income per share for the years indicated (in thousands, except per share amounts):
		Years Ended December 31,
		2014		2013		2012
	Numerator:
	Net income	$	14,508	$	18,808	$	9,641
	Denominator:
	Shares used in computing net income per share:
	Weighted average of common shares outstanding
	Basic		18,488		17,785		17,596
	Diluted		18,935		18,481		17,861
	Net income per share:
	Basic	$	0.78	$	1.06	$	0.55
	Diluted	$	0.77	$	1.02	$	0.54

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components [Abstract]
Schedule of Balance Sheet Components		December 31,
		2014			2013
	Cash and cash equivalents:
	Cash	$	18,653		$	17,676
	Money market instruments and funds		4,070			927
		$	22,723		$	18,603
	Accounts receivable, net:
	Accounts receivable	$	10,927		$	11,687
	Less: Allowance for doubtful accounts and sales returns		(121	)		(121	)
		$	10,806		$	11,566
	Allowance for doubtful accounts and sales returns:
	Balance at beginning of year	$	121		$	121
	Utilized		-			-
	Balance at end of year	$	121		$	121
	Inventories:
	Finished goods	$	3,191		$	3,201
	Work-in-process		3,430			4,498
	Raw materials		5,052			5,330
		$	11,673		$	13,029
	Inventory reserves:
	Finished goods	$	647		$	746
	Work-in-process		460			364
	Raw materials	$	1,261		$	1,289
		$	2,368		$	2,399
	Accrued expenses and other current liabilities:
	Compensation costs	$	5,016		$	5,104
	Professional fees		55			38
	Outside commissions		143			112
	Royalties		135			74
	ESPP		138			151
	Deferred rent		33			57
	Warranty		82			57
	Operating related (Taiwan and China)		417			289
	Income tax		2,204			890
	Others		476			362
		$	8,699		$	7,134
	Long-term liabilities:
	Income tax payable	$	376		$	-
	Accrued pension liability (Taiwan)		602			600
		$	978		$	600
	Accumulated other comprehensive Income:
	Cumulative translation adjustments	$	1,447		$	2,408
	Unrealized gain/(loss) on short-term investments		(10	)		4
		$	1,437		$	2,412

Property_and_Equipment_Net_Tab

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Property and Equipment, Net [Abstract]
Schedule of Property and Equipment, Net		December 31,
	(in thousands)	2014			2013
	Machinery and equipment	$	21,685		$	20,696
	Furniture and fixtures		686			673
	Leasehold improvements		1,285			986
	Building and equipment prepayments		3,804			2,948
		$	27,460		$	25,303
	Less: Accumulated depreciation		(13,592	)		(12,045	)
	Total property and equipment, net	$	13,868		$	13,258

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes [Abstract]
Schedule of Components of Income (Loss) before Income Taxes				Years Ended December 31,
				2014				2013				2012
	Income subject to domestic income taxes only			$	8,608			$	17,645			$	4,000
	Income subject to foreign income taxes only				13,764				164				2,456
				$	22,372			$	17,809			$	6,456
Schedule of Income Tax Provision (Benefit)				Years Ended December 31,
	Current:			2014				2013					2012
	Federal			$	2,663			$	382				$	107
	State				75				1					-
	Foreign				2,403				953					409
					5,141				1,336					516
	Deferred:
	Federal				1,891				(1,450	)				(3,160	)
	State				763				(232	)				(541	)
	Foreign				69				(653	)				-
					2,723				(2,335	)				(3,701	)
	Total provision (benefit) for income taxes			$	7,864			$	(999	)			$	(3,185	)
Schedule of Deferred Tax Assets			Years Ended December 31,
			2014				2013				2012
	Deferred tax assets - current:
	Net operating loss carryforwards		$	-			$	3,501			$	8,230
	Windfall tax benefit carryforwards			-				(580	)			-
	Federal/State credit carryforwards			2,536				2,260				2,245
	Depreciation and amortization			24				6				-
	Stock compensation			326				-				649
	Accrued liabilities and allowances			1,508				1,532				788
	Unrecognized tax benefit			(704	)			(683	)			-
				3,690				6,036				11,912
	Less: valuation allowance			-				-				(8,210	)
	Total deferred tax assets		$	3,690			$	6,036			$	3,702
Reconciliation of Effective Tax Rates and Statutory Federal Income Tax Rate		Years Ended December 31,
		2014			2013			2012
	Tax at federal statutory rate	34	%		34	%		34	%
	State, net of federal benefit	5.8			5.8			5.8
	Effect of permanent differences	3.8			1.1			-
	Stock and deferred compensation	0.9			(7.2	)		(0.8	)
	Net operating loss carryover	5.6			-			-
	Foreign tax differential	(13.1	)		0.1			4.4
	Reserarch and development credits	-			-			(1.1	)
	Minimum tax	0.6			1.7			1.4
	Income tax credits	(1.9	)		(0.9	)		(0.3	)
	Valuation allowance	-			(47.4	)		(88.7	)
	Unrecognized tax position	2.1			2.3			-
	Other	(2.6	)		4.9			(4.0	)
	Provision (benefit) for taxes	35.2	%		(5.6	)%		(49.3	)%

Geographic_Segment_Information1

Geographic Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Geographic Segment Information [Abstract]
Schedule of Segment Reporting Information		Years Ended December 31,
		2014		2013		2012
	Revenues
	North America	$	52,101	$	42,815	$	27,299
	Europe		18,102		15,604		8,933
	Asia		15,784		17,651		10,379
		$	85,987	$	76,070	$	46,611
		Years Ended December 31,
			2014		2013		2012
	Revenues
	Connectivity Products	$	64,791	$	57,660	$	32,622
	Optical Passive Products		21,196		18,410		13,989
		$	85,987	$	76,070	$	46,611
		Years Ended December 31,
		2014		2013
	Property and Equipment, net
	United States	$	185	$	40
	Taiwan		8,568		7,148
	China		5,115		6,070
		$	13,868	$	13,258

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Schedule of Aggregate Future Minimum Facility Lease Payments	Total future minimum lease payments under operating leases as of December 31, 2014 are summarized below (in thousands):
	Years ending December 31,
	2015	$	972
	2016		701
	2017		452
	2018		446
	2019 and after		391
	Total	$	2,962

Fair_Value_of_Financial_instru1

Fair Value of Financial instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial instruments [Abstract]
Schedule of Financial Assets at Fair Value		Fair Value Measurements at
		Reporting Date Using
				Quoted Prices			Significant
				in Active			Other			Significant
		Balance at		Markets for			Observable			Unobservable
		December 31,		Identical Assets			Inputs			Inputs
		2014		(Level 1)			(Level 2)			(Level 3)
	Cash equivalents:
	Money market mutual funds	$	4,070	$	4,070		$	-	$		-
	Marketable Securities:
	Time deposits		21,782		21,782			-			-
	Corporate bonds		10,075		-			10,075			-
	Long-term investments:
	Time deposits		10,635		10,635			-			-
	Total	$	46,562	$	36,487		$	10,075	$		-
		Fair Value Measurements at
		Reporting Date Using
				Quoted Prices			Significant
				in Active			Other			Significant
		Balance at		Markets for			Observable			Unobservable
		December 31,		Identical Assets			Inputs			Inputs
			2013		(Level 1	)		(Level 2)			(Level 3	)
	Cash equivalents:
	Money market mutual funds	$	927	$	927		$	-	$		-
	Short-term investments:
	Time deposits		15,065		15,065			-			-
	Corporate bonds		13,011		-			13,011			-
	Long-term investments:
	Time deposits		10,453		10,453			-			-
	Total	$	39,456	$	26,445		$	13,011	$		-

Selected_Quarterly_Data_Tables

Selected Quarterly Data (Tables)	12 Months Ended
	Dec. 31, 2014
Selected Quarterly Data [Abstract]
Schedule of Selected Quarterly Data		First		Second		Third		Fourth
		Quarter		Quarter		Quarter		Quarter
	2014
	Revenues, net	$	24,882	$	24,199	$	18,096	$	18,810
	Gross profit		9,914		9,695		7,139		7,469
	Net income		5,015		3,782		4,303		1,408
	Net income per share - basic		0.27		0.2		0.23		0.08
	Net income per share - diluted		0.26		0.2		0.23		0.08
	2013
	Revenues, net	$	12,153	$	19,039	$	23,074	$	21,804
	Gross profit		4,408		7,280		8,856		8,574
	Net income		1,850		4,282		5,621		7,055
	Net income per share - basic		0.11		0.24		0.31		0.38
	Net income per share - diluted		0.1		0.23		0.3		0.37

The_Company_and_summary_of_sig3

The Company and summary of significant accounting policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Inventories
Inventory reserves	$2,368,000	$2,399,000	$1,900,000
Property and equipment
Depreciation	2,799,000	2,175,000	1,609,000
Revenue recognition
Accrued warranty reserves	80,000	60,000	20,000
Income taxes
Unrecognized tax benefit that, if recognized, would affect the effective tax rate	400,000	300,000	0
Reconciliation of Unrecognized Tax Benefits:
Beginning balance	683,000
Additions for tax positions of the prior year	280,000
Additions based on tax positions related to the current year	117,000	683,000
Ending balance	1,080,000	683,000
Expense for interest and penalties	100,000	100,000	0
Deferred tax asset not recognized, excess tax benefits from employee stock option exercises	$6,000,000	$1,800,000
Buildings [Member]
Property and equipment
Estimated useful life	25 years
Machinery and Equipment [Member] | Minimum [Member]
Property and equipment
Estimated useful life	2 years
Machinery and Equipment [Member] | Maximum [Member]
Property and equipment
Estimated useful life	10 years
Furniture and Fixtures [Member]
Property and equipment
Estimated useful life	5 years
Leasehold Improvements [Member] | Minimum [Member]
Property and equipment
Estimated useful life	2 years
Leasehold Improvements [Member] | Maximum [Member]
Property and equipment
Estimated useful life	4 years

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	0 Months Ended			12 Months Ended			0 Months Ended
In Millions, except Share data, unless otherwise specified	Nov. 14, 2014	Nov. 07, 2013	Aug. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 25, 2012	Aug. 29, 2013
Class of Stock [Line Items]
Preferred stock, shares authorized				5,000,000	5,000,000
Preferred stock, shares outstanding				0	0
Common stock, shares authorized				100,000,000	100,000,000	20,000,000
Stock split, conversion ratio			2
Common stock, shares issued			18,123,136	17,942,595	18,408,261
Common stock, shares outstanding			18,123,136	17,942,595	18,408,261
Stock Repurchase Program, Authorized Amount (in dollars)				$15
Dividends declared, per share	$0.15	$0.15
Beneficial Ownership Of Outstanding Shares				15.00%
2014 October Program [Member]
Class of Stock [Line Items]
Shares repurchased during period				740,190
November 2011 Program [Member]
Class of Stock [Line Items]
Shares repurchased during period					158,798	976,332
Scenario, Previously Reported [Member]
Class of Stock [Line Items]
Common stock, shares issued								9,061,568
Common stock, shares outstanding								9,061,568
Annual Cash Dividend [Member]
Class of Stock [Line Items]
Dividends declared, per share							$0.25
One Time Special Cash Dividend [Member]
Class of Stock [Line Items]
Dividends declared, per share							$1
Foxconn Holding Limited [Member]
Class of Stock [Line Items]
Beneficial Ownership Of Outstanding Shares				15.00%
Affiliate or Associates and Entities [Member]
Class of Stock [Line Items]
Beneficial Ownership Of Outstanding Shares				1.00%

Stockbased_Compensation_Schedu

Stock-based Compensation (Schedule of Weighted Average Assumptions) (Details) (Employee Stock Option [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.02%	0.49%	0.51%
Time to maturity (in years)	4 years	4 years	3 years
Annualized volatility	69.67%	30.30%	30.01%
Expected dividend rate	1.20%	0.98%	10.83%

Stockbased_Compensation_Narrat

Stock-based Compensation (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended				0 Months Ended
	Oct. 21, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Apr. 29, 2011	Dec. 31, 2010	Nov. 30, 2000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock were reserved for issuance							10,000,000	300,000
Stock incentive plan, additional shares authorized	900,000
Compensation expense		$2,160,000	$1,917,000	$1,066,000
Scenario, Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive plan, additional shares authorized		680,000
Increase to number of shares reserved for issuance as a percentage of outstanding shares		5.00%
Restricted Stock Units (RSUs) [Member] | 2011 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted					546,000
Grant-date fair value of units granted					2,500,000
Compensation expense		400,000	500,000
Unrecognized compensation cost		500,000
Unrecognized compensation cost, recognition period		2 years
Restricted Stock Units (RSUs) [Member] | 2013 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted			342,000
Grant-date fair value of units granted			2,300,000
Compensation expense		800,000	600,000
Unrecognized compensation cost		600,000
Unrecognized compensation cost, recognition period		2 years
Unrecognized compensation cost, year one		500,000
Unrecognized compensation cost, year two		100,000
Restricted Stock Units (RSUs) [Member] | Vesting Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		2 years
Vesting rate		50.00%
Restricted Stock Units (RSUs) [Member] | Vesting Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Vesting rate		33.30%
Restricted Stock Units (RSUs) [Member] | Vesting Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years
Vesting rate		20.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Plan duration		10 years
Intrinsic value of options exercised		1,300,000	12,800,000
Dividend rate		0.15%	0.15%
Cash received from option exercises		600,000	5,200,000
Options exercisable		118,161	115,400
Options exercisable, average exercise price		$4.75	$4.01
Shares available for future issuance		733,924
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock were reserved for issuance								600,000
Stock incentive plan, additional shares authorized						600,000
Shares available for future issuance		268,141
Common stock purchase price, percentage of fair market value		85.00%
Shares issued under ESPP		50,759	92,111
Compensation expense		$461,980	$409,079	$139,595
Employee Stock Purchase Plan [Member] | Scenario, Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive plan, additional shares authorized		400,000
Increase to number of shares reserved for issuance as a percentage of outstanding shares		1.00%

Stockbased_Compensation_Schedu1

Stock-based Compensation (Schedule of Stock Option Activity) (Details) (Employee Stock Option [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Employee Stock Option [Member]
Shares
Outstanding, beginning balance	565,640
Granted	346,600
Exercised	-129,140
Forfeited	-90,000
Outstanding, ending balance	693,100
Vested and expected to vest, end of period	661,872
Exercisable, end of period	118,161	115,400
Weighted Average Exercise Price
Outstanding, beginning balance	$5.28
Granted	$12.46
Exercised	$4.71
Forfeited	$4.45
Outstanding, ending balance	$9.08
Vested and expected to vest, end of period	$9.04
Exercisable, end of period	$4.75	$4.01
Weighted Average Remaining Contractual Life
Outstanding, ending balance	8 years 3 months 29 days
Vested and expected to vest, end of period	8 years 3 months 18 days
Exercisable, end of period	5 years 9 months 7 days
Aggregate Intrinsic Value
Outstanding, ending balance	$3,761,988
Vested and expected to vest, end of period	3,617,550
Exercisable, end of period	$1,152,749

Stockbased_Compensation_Schedu2

Stock-based Compensation (Schedule of Information Relating to Stock Options Outstanding) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding	693,100
Options Outstanding, Weighted Average Remaining Contractual Term	8 years 3 months 29 days
Options Outstanding, Weighted Average Exercise Price	$9.08
Options Exercisable, Number Exercisable	118,161
Options Exercisable, Weighted Average Exercise Price	$4.75
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$2.25
Range of Exercise Price Maximum	$4.58
Options Outstanding, Number Outstanding	117,800
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 22 days
Options Outstanding, Weighted Average Exercise Price	$3.96
Options Exercisable, Number Exercisable	59,066
Options Exercisable, Weighted Average Exercise Price	$4.03
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$4.80
Range of Exercise Price Maximum	$6.03
Options Outstanding, Number Outstanding	55,900
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 10 months 6 days
Options Outstanding, Weighted Average Exercise Price	$5.01
Options Exercisable, Number Exercisable	45,895
Options Exercisable, Weighted Average Exercise Price	$5.06
Exercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$6.87
Range of Exercise Price Maximum	$6.87
Options Outstanding, Number Outstanding	140,400
Options Outstanding, Weighted Average Remaining Contractual Term	8 years 3 months 14 days
Options Outstanding, Weighted Average Exercise Price	$6.87
Options Exercisable, Number Exercisable	12,600
Options Exercisable, Weighted Average Exercise Price	$6.87
Exercise Price Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$8.17
Range of Exercise Price Maximum	$8.17
Options Outstanding, Number Outstanding	32,400
Options Outstanding, Weighted Average Remaining Contractual Term	8 years 4 months 17 days
Options Outstanding, Weighted Average Exercise Price	$8.17
Options Exercisable, Number Exercisable	600
Options Exercisable, Weighted Average Exercise Price	$8.17
Exercise Price Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$12.32
Range of Exercise Price Maximum	$12.32
Options Outstanding, Number Outstanding	72,200
Options Outstanding, Weighted Average Remaining Contractual Term	9 years 11 months 1 day
Options Outstanding, Weighted Average Exercise Price	$12.32
Options Exercisable, Number Exercisable
Options Exercisable, Weighted Average Exercise Price
Exercise Price Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	$12.50
Range of Exercise Price Maximum	$12.50
Options Outstanding, Number Outstanding	274,400
Options Outstanding, Weighted Average Remaining Contractual Term	9 years 2 months 8 days
Options Outstanding, Weighted Average Exercise Price	$12.50
Options Exercisable, Number Exercisable
Options Exercisable, Weighted Average Exercise Price

Stockbased_Compensation_Schedu3

Stock-based Compensation (Schedule of Information Relating to ESPP) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense for ESPP	$2,160,000	$1,917,000	$1,066,000
Total amount of cash received from the purchase of stock through ESPP	661,000	521,000	416,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value per share of shares purchased	$13.01	$5.66	$7.07
Total compensation expense for ESPP	461,980	409,079	139,595
Total amount of cash received from the purchase of stock through ESPP	660,621	521,308	416,741
Total intrinsic value of ESPP stock purchased at December 31st	$75,892	$863,120	$291,958

Stockbased_Compensation_Schedu4

Stock-based Compensation (Schedule of Employee Stock-Based Compensation Expense) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$2,160,000	$1,917,000	$1,066,000
Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	491,000	373,000	119,000
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	234,000	232,000	125,000
Sales, Marketing and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,435,000	1,312,000	822,000
Operating Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$1,669,000	$1,544,000	$947,000

Net_Income_per_Share_Details

Net Income per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income attributable to common stockholders									$14,508	$18,808	$9,641
Weighted average of common shares outstanding
Basic									18,488	17,785	17,596
Diluted									18,935	18,481	17,861
Net income per share attributable to common stockholders:
Basic	$0.08	$0.23	$0.20	$0.27	$0.38	$0.31	$0.24	$0.11	$0.78	$1.06	$0.55
Diluted	$0.08	$0.23	$0.20	$0.26	$0.37	$0.30	$0.23	$0.10	$0.77	$1.02	$0.54

Balance_Sheet_Components_Detai

Balance Sheet Components (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and cash equivalents:
Cash	$18,653	$17,676
Money market instruments and funds	4,070	927
Cash and Cash Equivalents, At Carrying Value	22,723	18,603	4,793	13,820
Accounts receivable, net:
Accounts receivable	10,927	11,687
Less: Allowance for doubtful accounts and sales returns	-121	-121
Accounts Receivable, Net, Current	10,806	11,566
Allowance for doubtful accounts and sales returns:
Balance at beginning of year	121	121
Utilized
Balance at end of year	121	121
Inventories, net:
Finished goods	3,191	3,201
Work-in-process	3,430	4,498
Raw materials	5,052	5,330
Inventories	11,673	13,029
Inventory reserves:
Inventory reserves	2,368	2,399	1,900
Accrued expenses and other current liabilities:
Compensation costs	5,016	5,104
Professional fees	55	38
Outside commissions	143	112
Royalties	135	74
ESPP	138	151
Deferred rent	33	57
Warranty	82	57
Operating related (Taiwan and China)	417	289
Income tax	2,204	890
Others	476	362
Accrued Liabilities, Current, Total	8,699	7,134
Long-term liabilities:
Income tax payable	376
Accrued pension liability (Taiwan)	602	600
Liabilities, Noncurrent, Total	978	600
Accumulated other comprehensive Income:
Cumulative translation adjustments	1,447	2,408
Unrealized gain/(loss) on short-term investments	-10	4
Accumulated Other Comprehensive Income (Loss), Net Of Tax	1,437	2,412
Finished Goods [Member]
Inventory reserves:
Inventory reserves	647	746
Work In Process [Member]
Inventory reserves:
Inventory reserves	460	364
Raw Materials [Member]
Inventory reserves:
Inventory reserves	$1,261	$1,289

Property_and_Equipment_Net_Det

Property and Equipment, Net (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property and Equipment	$27,460	$25,303
Less: Accumulated depreciation	-13,592	-12,045
Total property and equipment, net	13,868	13,258
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	21,685	20,696
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	686	673
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	1,285	986
Building and Equipment Prepayments [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment	$3,804	$2,948

Income_Taxes_Schedule_of_Compo

Income Taxes (Schedule of Components of Income (Loss) before Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Income subject to domestic income taxes only	$8,608	$17,645	$4,000
Income subject to foreign income taxes only	13,764	164	2,456
Income before benefit (provision) for income taxes	$22,372	$17,809	$6,456

Income_Taxes_Schedule_of_Incom

Income Taxes (Schedule of Income Tax Provision (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$2,663	$382	$107
State	75	1
Foreign	2,403	953	409
Current Income Tax Expense (Benefit)	5,141	1,336	516
Deferred:
Federal	1,891	-1,450	-3,160
State	763	-232	-541
Foreign	69	-653
Deferred Income Tax Expense (Benefit)	2,723	-2,335	-3,701
Total benefit for income taxes	$7,864	($999)	($3,185)

Income_Taxes_Schedule_of_Defer

Income Taxes (Schedule of Deferred Tax Assets) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred tax assets - current:
Net operating loss carryforwards		$3,501	$8,230
Windfall tax benefit carryforwards		-580
Federal/State credit carryforwards	2,536	2,260	2,245
Depreciation and amortization	24	6
Stock compensation	326		649
Accrued liabilities and allowances	1,508	1,532	788
Unrecognized tax benefit	-704	-683
Deferred Tax Assets, Gross	3,690	6,036	11,912
Less: valuation allowance			-8,210
Net deferred tax assets	$3,690	$6,036	$3,702

Income_Taxes_Reconciliation_of

Income Taxes (Reconciliation of Effective Tax Rates and Statutory Federal Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Tax at federal statutory rate	34.00%	34.00%	34.00%
State, net of federal benefit	5.80%	5.80%	5.80%
Effect of permanent differences	3.80%	1.10%
Stock and deferred compensation	0.90%	-7.20%	-0.80%
Net operating loss carryover	5.60%
Foreign tax differential	-13.10%	0.10%	4.40%
Reserarch and development credits			-1.10%
Minimum tax	0.60%	1.70%	1.40%
Income tax credits	-1.90%	-0.90%	-0.30%
Valuation allowance		-47.40%	-88.70%
Unrecognized tax position	2.10%	2.30%
Other	-2.60%	4.90%	-4.00%
Provision (benefit) for taxes	35.20%	-5.60%	-49.30%

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$0.90
Net operating loss carryforwards, expiration date	31-Dec-24
Tax Credit Carryforward, Amount	1.2
Research credit carryforwards , expiration date	1-Jan-19
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	5.2
Net operating loss carryforwards, expiration date	31-Dec-18
Tax Credit Carryforward, Amount	$1

Concentrations_of_Certain_Risk1

Concentrations of Certain Risks (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	26.90%	46.00%	18.00%
Sales [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	39.60%	35.30%
Sales [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage			10.00%

Geographic_Segment_Information2

Geographic Segment Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues
Revenues	$18,810	$18,096	$24,199	$24,882	$21,804	$23,074	$19,039	$12,153	$85,987	$76,070	$46,611
Property and Equipment
Property and Equipment, net	13,868				13,258				13,868	13,258
North America [Member]
Revenues
Revenues									52,101	42,815	27,299
Europe [Member]
Revenues
Revenues									18,102	15,604	8,933
Asia [Member]
Revenues
Revenues									15,784	17,651	10,379
United States [Member]
Property and Equipment
Property and Equipment, net	185				40				185	40
Taiwan [Member]
Property and Equipment
Property and Equipment, net	8,568				7,148				8,568	7,148
China [Member]
Property and Equipment
Property and Equipment, net	5,115				6,070				5,115	6,070
Connectivity Products [Member]
Revenues
Revenues									64,791	57,660	32,622
Optical Passive Products [Member]
Revenues
Revenues									$21,196	$18,410	$13,989

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Indemnification and Product Warranty:
Accrued warranty reserves	$80,000	$60,000	$20,000
Operating Leases:
Total rent expense	700,000	700,000	700,000
2015	972,000
2016	701,000
2017	452,000
2018	446,000
2019 and after	391,000
Total	$2,962,000

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Ownership percentage	17.83%
Hon Hai Precision Industry Co. Ltd. [Member]
Related Party Transaction [Line Items]
Net sales to related party	$0.07	$0.01	$0.06
Purchases of raw materials from related party	1.8	1.5	1
Amounts due from related party	0.05	0.01	0
Amounts due to related party	$0.40	$0.30	$0.30

Fair_Value_of_Financial_instru2

Fair Value of Financial instruments (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$4,070	$927
Total	46,562	39,456
Short-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	21,782	15,065
Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,075	13,011
Long-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,635	10,453
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	4,070	927
Total	36,487	26,445
Fair Value, Inputs, Level 1 [Member] | Short-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	21,782	15,065
Fair Value, Inputs, Level 1 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments
Fair Value, Inputs, Level 1 [Member] | Long-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,635	10,453
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents
Total	10,075	13,011
Fair Value, Inputs, Level 2 [Member] | Short-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments
Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,075	13,011
Fair Value, Inputs, Level 2 [Member] | Long-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents
Total
Fair Value, Inputs, Level 3 [Member] | Short-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments
Fair Value, Inputs, Level 3 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments
Fair Value, Inputs, Level 3 [Member] | Long-Term Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments

Selected_Quarterly_Data_Detail

Selected Quarterly Data (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selected Quarterly Data [Abstract]
Revenues, net	$18,810	$18,096	$24,199	$24,882	$21,804	$23,074	$19,039	$12,153	$85,987	$76,070	$46,611
Gross profit	7,469	7,139	9,695	9,914	8,574	8,856	7,280	4,408	34,217	29,118	15,994
Net income	$1,408	$4,303	$3,782	$5,015	$7,055	$5,621	$4,282	$1,850	$14,508	$18,808	$9,641
Net income per share - basic	$0.08	$0.23	$0.20	$0.27	$0.38	$0.31	$0.24	$0.11	$0.78	$1.06	$0.55
Net income per share - diluted	$0.08	$0.23	$0.20	$0.26	$0.37	$0.30	$0.23	$0.10	$0.77	$1.02	$0.54