Neophotonics (NPTN) 10-Q/A 9 Apr 14 2013 Q1 Quarterly report (amended) Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2013
Document Information [Line Items]	'	'
Document Type	'10-Q/A	'
Amendment Flag	'true	'
Amendment Description	'NeoPhotonics Corporation (the “Company”), is filing this Amendment No. 2 to its Quarterly Report on Form 10-Q (“Amendment No. 2”) to restate and amend the Company’s previously issued and unaudited interim financial statements and related financial information as of March 31, 2013 and for the three months ended March 31, 2013, which was originally filed with the Securities and Exchange Commission (the “SEC”) on May 15, 2013 and subsequently amended in Amendment No. 1 (“Amendment No. 1”) filed with the SEC on August 8, 2013. Amendment No. 1 was filed to adjust the Company’s consolidated statement of cash flows for the three months ended March 31, 2013 for amounts related to purchases of property and equipment that were overstated. As disclosed in the Company’s Current Report on Form 8-K filed with the SEC on November 14, 2013, the Company determined that its unaudited condensed consolidated financial statements for the three months ended March 31, 2013 contained an error related to its accounting for a real estate registration tax which was incorrectly reflected as a component of the property, plant and equipment acquired as part of the purchase of NeoPhotonics Semiconductor (formerly the Optical Component Unit of LAPIS Semiconductor (“OCI”)). In addition, the Company has made other corrections related to the purchase of NeoPhotonics Semiconductor, classification of certain amounts and other corrections, all of which were discovered during the close of its September 30, 2013 accounting records. For further information regarding the restatement, see Note 2 of the Notes to the Condensed Consolidated Financial Statements. Because of the corrections described above, management re-evaluated the Company’s control environment and concluded that additional material weaknesses existed at March 31, 2013 as more fully described in Item 4 “Controls and Procedures” in this Amendment No. 2. Consistent with the information described above, the Company has revised the following items in this Amendment No. 2: Part I Item 1- Condensed Consolidated Financial Statements Item 2 – Management’s Discussion and Analysis of Financial Condition and Results of Operations Item 4 – Controls and Procedures Part II Item 1A- Risk Factors Additionally, in this Amendment No. 2, the Company is including currently dated certifications from the Company’s Principal Executive Officer and Principal Financial Officer as required by Section 302 of the Sarbanes-Oxley Act of 2002 in Exhibits 31.1 and 31.2 and a currently dated certification from the Company’s Principal Executive Officer and Principal Financial Officer as required by Section 906 of the Sarbanes-Oxley Act of 2002 in Exhibit 32.1. Except to the extent described above and set forth herein, the items and other disclosures in the Form 10-Q initially filed on May 15, 2013 (the “initial Form 10-Q”) as previously amended by Amendment No. 1 are unchanged and this Amendment No. 2 does not reflect any events that have occurred after the initial Form 10-Q was filed. Accordingly, this Amendment No. 2 should be read in conjunction with the Company’s initial Form 10-Q (as amended by Amendment No. 1) and the Company’s subsequent filings with the United States Securities and Exchange Commission. In light of the restatement, readers should not rely on the Company’s previously filed financial statements as of and for the three month period ended March 31, 2013.	'
Document Period End Date	31-Mar-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'NPTN	'
Entity Registrant Name	'NEOPHOTONICS CORP	'
Entity Central Index Key	'0001227025	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	30,611,417

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$51,404	[1]	$36,940	[2]
Short-term investments	48,356	[1]	64,301	[2]
Restricted cash	2,108	[1]	2,626	[2]
Accounts receivable, net of allowance for doubtful accounts	63,267	[1]	70,354	[2]
Inventories	61,859	[1]	43,793	[2]
Prepaid expenses and other current assets	10,480	[1]	7,630	[2]
Total current assets	237,474	[1]	225,644	[2]
Long-term investments	331	[1]	188	[2]
Property, plant and equipment, net	70,001	[1]	54,440	[2]
Other intangible assets, net	18,766	[1]	14,213	[2]
Other long-term assets	1,361	[1]	1,147	[2]
Total assets	327,933	[1]	295,632	[2]
Current liabilities:	'		'
Accounts payable	40,817	[1]	36,308	[2]
Notes payable	10,431	[1]	12,003	[2]
Current portion of long-term debt	8,960	[1]	5,000	[2]
Accrued and other current liabilities	24,874	[1]	19,959	[2]
Total current liabilities	85,082	[1]	73,270	[2]
Long-term debt, net of current portion	42,170	[1]	17,167	[2]
Deferred income tax liabilities	655	[1]	653	[2]
Other noncurrent liabilities	8,147	[1]	1,862	[2]
Total liabilities	136,054	[1]	92,952	[2]
Commitments and contingencies (Note 10)	'	[1]	'	[2]
Stockholders’ equity:	'		'
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'	[1]	'	[2]
Common stock, $0.0025 par value At March 31, 2013: 100,000,000 shares authorized, 30,604,293 shares issued and outstanding; At December 31, 2012: 100,000,000 shares authorized, 30,546,155 shares issued and outstanding	76	[1]	76	[2]
Additional paid-in capital	440,144	[1]	438,858	[2]
Accumulated other comprehensive income	11,982	[1]	11,829	[2]
Accumulated deficit	-260,323	[1]	-248,083	[2]
Total stockholders’ equity	191,879	[1]	202,680	[2]
Total liabilities and stockholders’ equity	$327,933	[1]	$295,632	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Preferred stock, par value	$0.00	[1]	$0.00	[2]
Preferred stock, shares authorized	10,000,000	[1]	10,000,000	[2]
Preferred stock, shares issued	0	[1]	0	[2]
Preferred stock, shares outstanding	0	[1]	0	[2]
Common stock, par value	$0.00	[1]	$0.00	[2]
Common stock, shares authorized	100,000,000	[1]	100,000,000	[2]
Common stock, shares issued	30,604,293	[1]	30,546,155	[2]
Common stock, shares outstanding	30,604,293	[1]	30,546,155	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Revenue	$56,063	[1]	$54,223
Cost of goods sold	44,306	[1]	42,817
Gross profit	11,757	[1]	11,406
Operating expenses:	'		'
Research and development	9,707	[1]	10,538
Sales and marketing	3,586	[1]	3,023
General and administrative	5,059	[1]	6,601
Acquisition-related transaction costs	4,510	[1]	394
Amortization of purchased intangible assets	321	[1]	354
Restructuring charges	325	[1]	130
Adjustment to fair value of contingent consideration	'	[1]	1,907
Total operating expenses	23,508	[1]	22,947
Loss from operations	-11,751	[1]	-11,541
Interest income	131	[1]	132
Interest expense	-163	[1]	-154
Other expense, net	-274	[1]	-275
Total interest and other expense, net	-306	[1]	-297
Loss before income taxes	-12,057	[1]	-11,838
Income tax (expense) benefit	-183	[1]	60
Loss from continuing operations	-12,240	[1]	-11,778
Income from discontinued operations, net of tax (including gain on disposal of $636, net of tax, for the three months ended March 31, 2012)	'	[1]	170
Net loss	($12,240)	[1],[2],[3]	($11,608)
Basic and diluted net income (loss) per share:	'		'
Continuing operations	($0.40)	[1]	($0.47)
Discontinued operations	'	[1]	$0.01
Net loss	($0.40)	[1]	($0.46)
Weighted average shares used to compute basic and diluted net income (loss) per share:	30,574,032	[1]	24,870,684
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2012
Discontinued operations gain on disposal, net of tax	$636

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Net loss	($12,240)	[1],[2],[3]	($11,608)
Foreign currency translation adjustments	172	[2]	125
Unrealized gain (loss) on investments, net of tax of $0	-19	[2]	296
Comprehensive loss	($12,087)	[2]	($11,187)
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Comprehensive Loss (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Unrealized gains on investments, tax	$0	[1]	$0
[1]	Restated and Revised, see Note 2

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Cash Flows From Operating Activities	'		'
Net loss	($12,240)	[1],[2],[3]	($11,608)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation and amortization	4,152	[3]	5,353
Asset impairment charges	34	[3]	14
Stock-based compensation expense	1,202	[3]	1,144
Deferred taxes	'		387
Loss on disposal of property and equipment	111	[3]	18
Gain on sale of discontinued operations	'		-750
Allowance for doubtful accounts	22	[3]	8
Write-down of inventories	30	[3]	721
Change in assets and liabilities, net of effects of acquisitions:	'		'
Accounts receivable	7,155	[3]	9,155
Inventories	-4,682	[3]	-4,680
Prepaid expenses and other assets	-977	[3]	-1,800
Accounts payable	2,126	[3]	584
Acquisition-related transaction costs	3,948	[3]	'
Accrued and other liabilities	280	[3]	-184
Net cash provided by (used in) operating activities	1,161	[3]	-1,638
Cash Flows From Investing Activities	'		'
Purchase of property, plant and equipment	-5,134	[3]	-2,019
Purchase of marketable securities	-29,030	[3]	-12,964
Proceeds from sale of marketable securities	23,747	[3]	5,139
Proceeds from maturity of securities	20,900	[3]	15,100
Decrease in restricted cash	524	[3]	68
Acquisition of OCU, net of notes payable	-14,087	[3]	'
Proceeds received on sale of discontinued operations, net of tax	'		1,825
Net cash provided by (used in) investing activities	-3,080	[3]	7,149
Cash flows from financing activities	'		'
Proceeds from exercise of stock options	79	[3]	64
Proceeds from bank loans	26,443	[3]	'
Repayment of bank loans	-8,610	[3]	-1,250
Proceeds from issuance of notes payable	4,881	[3]	7,738
Repayment of notes payable	-6,482	[3]	-7,867
Net cash provided by (used in) financing activities	16,311	[3]	-1,315
Effect of exchange rates on cash and cash equivalents	72	[3]	209
Net increase in cash and cash equivalents	14,464	[3]	4,405
Cash and cash equivalents at the beginning of the period	36,940	[3]	32,485
Cash and cash equivalents at the end of the period	51,404	[3]	36,890
Notes Payable For OCU Acquisition	'		'
Supplemental disclosure of noncash investing and financing activities:	'		'
Issuance of notes to the seller of acquired business	$11,130	[3]	'
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2013
Basis of Presentation	'
	Note 1. Basis of presentation
	The unaudited condensed consolidated financial statements of NeoPhotonics Corporation (“NeoPhotonics” or the “Company”) as of March 31, 2013 and December 31, 2012 and for the three months ended March 31, 2013 and 2012, have been prepared in accordance with the instructions on Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In accordance with those rules and regulations, the Company has omitted certain information and notes normally provided in the Company’s annual consolidated financial statements. In the opinion of management, the condensed consolidated financial statements contain all adjustments, consisting only of normal recurring items, except as otherwise noted, necessary for the fair presentation of the Company’s financial position and results of operations for the interim periods. The year-end condensed balance sheet data was derived from audited financial statements, but does not include all disclosures required by U.S. generally accepted accounting principles (“U.S. GAAP”). These condensed consolidated financial statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012. The results of operations for the three months ended March 31, 2013 are not necessarily indicative of the results expected for the entire fiscal year. For purposes of these Notes to Condensed Consolidated Financial Statements, amounts have been restated and revised to give effect to the matters described in Note 2.
	Consolidation
	The condensed consolidated financial statements are prepared in accordance with U.S. GAAP and include the consolidated accounts of the Company and its majority owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates
	The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported revenue and expenses during the reporting period. Significant estimates made by management include: the fair values of identifiable assets acquired and liabilities assumed in business combinations; the useful lives of property, plant and equipment and intangible assets as well as future cash flows to be generated by those assets; allowances for doubtful accounts; valuation allowances for deferred tax assets; write off of excess and obsolete inventories and the valuations of stock-based compensation, among others. Actual results could differ from these estimates.
	Business Combinations—Acquisition Accounting
	Under the acquisition method of accounting, the Company allocates the purchase price of acquired companies to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The Company records the excess of purchase price over the aggregate fair values of the tangible and identifiable intangible assets as goodwill. The Company determines the fair values of assets acquired and liabilities assumed. To establish fair value, the Company measures the price that would be received to sell an asset or paid to transfer a liability in an ordinary transaction between market participants. The measurement assumes the highest and best use of the asset by the market participants that would maximize the value of the asset or the group of assets within which the asset would be used at the measurement date, even if the intended use of the asset is different.
	The Company estimates the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expenses. The Company estimates the future cash flows to be derived from such assets, and these estimates are used to determine the fair value of the assets. If any of these estimates change, depreciation or amortization expenses could be changed and/or the value of our intangible assets could be impaired.
	Acquisition related costs, including real estate transaction taxes, finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees are accounted for as expenses in the periods in which the costs are incurred or the services are received.

Restatement_and_Revision_of_Un

Restatement and Revision of Unaudited Condensed Consolidated Financial Statements	3 Months Ended
	Mar. 31, 2013
Restatement and Revision of Unaudited Condensed Consolidated Financial Statements	'
	Note 2. Restatement and Revision of unaudited condensed consolidated financial statements
	The Company has restated and revised its March 31, 2013 unaudited condensed consolidated financial statements as described below.
	The effects of the restatement and revisions on the condensed consolidated balance sheet as of March 31, 2013 are summarized in the following table:
		31-Mar-13
		(In thousands, except per share data)
		Previously			Corrections						Revision for			Restated
		Reported						Penalty			Measurement			and
								Payment			Period			Revised
								Derivative			Adjustments
	ASSETS
	Current assets:
	Cash and cash equivalents	$	51,404		$	—		$	—		$	—		$	51,404
	Short-term investments		48,356			—			—			—			48,356
	Restricted cash		2,108			—			—			—			2,108
	Accounts receivable, net of allowance for doubtful accounts		63,267			—			—			—			63,267
	Inventories		68,818			(212	)		—			(6,747	)		61,859
	Prepaid expenses and other current assets		8,053			74			—			2,353			10,480
	Total current assets		242,006			(138	)		—			(4,394	)		237,474
	Long-term investments		331			—			—			—			331
	Property, plant and equipment, net		65,079			2,156			—			2,766			70,001
	Goodwill		2,188			(2,188	)		—			—			—
	Other intangible assets, net		17,176			(72	)		—			1,662			18,766
	Other long-term assets		4,206			(2,064	)		—			(781	)		1,361
	Total assets	$	330,986		$	(2,306	)	$	—		$	(747	)	$	327,933
	LIABILITIES, REDEEMABLE COMMON STOCK AND STOCKHOLDERS’ EQUITY
	Current liabilities:
	Accounts payable	$	40,963		$	(146	)	$	—		$	—		$	40,817
	Notes payable		10,431			—			—			—			10,431
	Current portion of long-term debt		10,710			(1,750	)		—			—			8,960
	Accrued and other current liabilities		23,520			1,225			—			129			24,874
	Total current liabilities		85,624			(671	)		—			129			85,082
	Long-term debt, net of current portion		40,420			1,750			—			—			42,170
	Deferred income tax liabilities		655			—			—			—			655
	Other noncurrent liabilities		10,506			(2,400	)		138			(97	)		8,147
	Total liabilities		137,205			(1,321	)		138			32			136,054
	Redeemable common stock		5,000			—			(5,000	)		—			—
	Stockholders’ equity:
	Preferred stock, $0.0025 par value
	Common stock, $0.0025 par value		76			—			—			—			76
	Additional paid-in capital		435,282			—			4,862			—			440,144
	Accumulated other comprehensive income		11,970			12			—			—			11,982
	Accumulated deficit		(258,547	)		(997	)		—			(779	)		(260,323	)
	Total stockholders’ equity		188,781			(985	)		4,862			(779	)		191,879
	Total liabilities, redeemable common stock and stockholders’ equity	$	330,986		$	(2,306	)	$	—		$	(747	)	$	327,933
	The effects of the restatement and revision on the condensed consolidated statement of operations for the three months ended March 31, 2013 are summarized in the following table:
		Three Months Ended March 31, 2013
		(In thousands, except share and per share  information)
		Previously			Corrections				Revision for		Restated
		Reported							Measurement		and
									Period		Revised
									Adjustments
	Revenue	$	56,063		$	—		$	—		$	56,063
	Cost of goods sold		44,333			(27	)		—			44,306
	Gross profit		11,730			27			—			11,757
	Operating expenses:
	Research and development		9,707			—			—			9,707
	Sales and marketing		3,586			—			—			3,586
	General and administrative		8,545			1,024			—			9,569
	Amortization of purchased intangible assets		321			—			—			321
	Restructuring charges		325			—			—			325
	Total operating expenses		22,484			1,024			—			23,508
	Loss from operations		(10,754	)		(997	)		—			(11,751	)
	Interest income		131			—			—			131
Interest expense		(163	)		—			—			(163	)
Other expense, net		(274	)		—			—			(274	)
Total interest and other expense, net		(306	)		—			—			(306	)
Loss before income taxes		(11,060	)		(997	)		—			(12,057	)
Income tax (expense) benefit		596			—			(779	)		(183	)
Net loss	$	(10,464	)	$	(997	)	$	(779	)	$	(12,240	)
Basic and diluted net loss per share:
Net loss	$	(0.34	)							$	(0.40	)
Weighted average shares used to compute basic and diluted net loss per share		30,574,032									30,574,032
The effects of the restatement and revision on the condensed consolidated statement of comprehensive loss for the three months ended March 31, 2013 are summarized in the following table:
	Three Months Ended March 31, 2013
	(In thousands)
	Previously			Corrections			Revision for			Restated
	Reported						Measurement			and
										Revised
							Period
							Adjustments
Net loss	$	(10,464	)	$	(997	)	$	(779	)	$	(12,240	)
Foreign currency translation adjustments		160			12			—			172
Unrealized loss on investments, net of tax of $0		(19	)		—			—			(19	)
Comprehensive loss	$	(10,323	)	$	(985	)	$	(779	)	$	(12,087	)
The effects of the restatement and revision on the condensed consolidated statement of cash flows for the three months ended March 31, 2013 are summarized in the following table:
	Three Months Ended March 31, 2013
	(In thousands)
	Previously			Corrections			Revision for			Restated
	Reported1						Measurement			and
							Period			Revised
							Adjustment
Cash flows from operating activities
Net loss	$	(10,464	)	$	(997	)	$	-779		$	(12,240	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization		4,590			(438	)		—			4,152
Asset impairment charges		34			—			—			34
Stock-based compensation expense		1,202			—			—			1,202
Deferred taxes		(781	)		—			781			—
Amortization of premiums and discounts on investments		—			—			—			—
Loss on disposal of property and equipment		111			—			—			111
Gain on sale of discontinued operations		—			—			—			—
Allowance for doubtful accounts		22			—			—			22
Write-down of inventories		30			—			—			30
Others		—			—			—			—
Change in assets and liabilities, net of effects of acquisitions:
Accounts receivable		7,155			—			—			7,155
Inventories		(4,682	)		—			—			(4,682	)
Prepaid expenses and other assets		(1,256	)		281			(2	)		(977	)
Accounts payable		4,014			(1,888	)		—			2,126
Acquisition-related transaction costs		3,190			758			—			3,948
Accrued and other liabilities		(1,462	)		1,742			—			280
Net cash provided by (used in) operating activities		1,703			(542	)		—			1,161
Cash flows from investing activities
Purchase of property, plant and equipment		(5,134	)		—			—			(5,134	)
Purchase of marketable securities		(29,030	)		—			—			(29,030	)
Proceeds from sale of marketable securities		23,747			—			—			23,747
Proceeds from maturity of securities		20,900			—			—			20,900
Decrease in restricted cash		524			—			—			524
Acquisition of OCU, net of notes payable		(14,629	)		542			—			(14,087	)
Net cash provided by (used in) investing activities		(3,622	)		542			—			(3,080	)
Cash flows from financing activities
Proceeds from exercise of stock options		79			—			—			79
Proceeds from bank loans		40,000			(13,557	)		—			26,443
Repayment of bank loans		(22,167	)		13,557			—			(8,610	)
Proceeds from issuance of notes payable		4,881			—			—			4,881
Repayment of notes payable		(6,482	)		—			—			(6,482	)
Net cash provided by (used in) financing activities		16,311			—			—			16,311
Effect of exchange rates on cash and cash equivalents		72			—			—			72
Net increase in cash and cash equivalents		14,464			—			—			14,464
Cash and cash equivalents at the beginning of the period		36,940			—			—			36,940
Cash and cash equivalents at the end of the period	$	51,404		$	—		$	—		$	51,404
1	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.
Corrections
Subsequent to the filing of its Quarterly Report on Form 10-Q/A (Amendment 1) for the period ended March 31, 2013, the Company determined that its condensed consolidated financial statements as of March 31, 2013 and for the three months then ended contained errors requiring restatement.  As further described below, the restatement reflects corrections related to the purchase of NeoPhotonics Semiconductor (formerly the Optical Component Unit of LAPIS Semiconductor), classification of certain amounts and other corrections.  The corrections include consideration of the related income tax effect.
Purchase Accounting Corrections
The Company has concluded that a real estate registration tax in the amount of $0.5 million was incorrectly allocated to acquired property, plant and equipment acquired as part of the purchase of NeoPhotonics Semiconductor and should have been expensed.  Additionally, the Company identified (i) real estate acquisition tax in the amount of $0.8 million that should have been accrued as an acquisition cost in the three months ended March 31, 2013, (ii) a correction to the estimated fair value of property and equipment that increased property and equipment and reduced goodwill by $2.2 million, (iii) unrecorded liabilities related to purchases of property and equipment of $0.3 million, (iv) unrecorded warranty obligations of $0.1 million and (v) certain inventory adjustments in the amount of $0.2 million.
Classification Corrections
The Company has concluded that it incorrectly separately classified a long-term asset related to the pension obligation assumed in the purchase of NeoPhotonics Semiconductor in the amount of $2.1 million that instead should have been netted against the long-term pension liability at March 31, 2013.  Additionally, the Company (i) overstated the current portion of long-term debt by $1.8 million at March 31, 2013, (ii) misclassified certain costs totaling $0.1 million between cost of goods sold and operating expenses in the three months ended March 31, 2013 and  (iii) misclassified $1.7 million between the change in accounts payable and the change in accrued and other liabilities within operating activities and overstated both proceeds from and repayment of bank loans by $13.6 million within financing activities in its condensed consolidated statement of cash flows for the three months ended March 31, 2013.
Other Corrections
The Company has concluded that it had incorrectly recorded amounts related to an asset retirement obligation and amounts related to certain purchased software maintenance contracts, which resulted in an overstatement of other long-term liabilities of $0.3 million and an overstatement of property, plant and equipment of $0.2 million.  The Company also overstated an amount payable to a vendor resulting in an overstatement of previously reported cost of goods sold of $0.1 million for the three months ended March 31, 2013.
Penalty Payment Derivative
As further described in Note 11, the Company may be required to pay a $5.0 million penalty if it does not achieve certain performance obligations agreed to in connection with the sale of its common stock in a private placement transaction on April 27, 2012.  The penalty payment was originally classified outside of equity as redeemable common stock at December 31, 2012 and March 31, 2013 since, while the Company intends to meet its performance obligations, it determined the ability to satisfy some of the obligations may be outside of the Company’s control.  The Company has since determined that the $5.0 million penalty payment is an embedded derivative instrument, with the underlying being the performance or nonperformance of meeting its performance obligations by the deadline, and has thus classified $4.9 million of the $5.0 million to additional paid-in capital and the remaining $0.1 million, representing the estimated fair value of the penalty payment derivative, to other noncurrent liabilities at March 31, 2013 and December 31, 2012. The effect on the Company’s balance sheet at December 31, 2012 for this matter was as follows:
		31-Dec-12
(in thousands)		Previously			As Revised
		Reported
Other noncurrent liabilities		$	1,724		$	1,862
Redeemable common stock			5,000			—
Additional paid-in capital			433,996			438,858
Revision for Purchase Price Allocation Measurement Period Adjustments
With the reissuance of the these condensed consolidated financial statements, the Company has revised its March 31, 2013 condensed consolidated balance sheet from amounts previously reported to reflect measurement period adjustments in the estimated fair value of inventory, property and equipment and other tangible and intangible assets acquired in the purchase of NeoPhotonics Semiconductor.  The changes in estimated fair value resulted from additional information obtained subsequent to the Company’s initial acquisition accounting.  The Company also recorded a valuation allowance against the NeoPhotonics Semiconductor deferred tax assets as a measurement period adjustment due to additional information received subsequent to the Company’s initial acquisition accounting.
Notes to Condensed Consolidated Financial Statements
In addition to the above adjustments, there were computational errors in deriving certain footnote amounts included within the Company’s previous Amendment No. 1 to its Quarterly Report on Form 10-Q/A.  Those amounts have been corrected herein.

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2013
Significant Accounting Policies	'
	Note 3. Significant accounting policies
	Except as described in Note 2, there have been no changes in the Company’s significant accounting policies for the three months ended March 31, 2013, as compared to the significant accounting policies described in its Annual Report on Form 10-K for the fiscal year ended December 31, 2012.
	Recent accounting pronouncements
	In February 2013, the Financial Accounting Standard Board (“FASB”) issued amendments to the FASB Accounting Standard Codification to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendments require new disclosures for items reclassified out of accumulated other comprehensive income (“AOCI”), including (1) changes in AOCI balances by component and (2) significant items reclassified out of AOCI. The guidance does not amend any existing requirements for reporting net income or OCI in the financial statements. As this guidance only requires expanded disclosures, the adoption of this guidance did not have a material effect on the Company’s consolidated financial statements.
	In March 2013, the FASB issued amendments to the FASB Accounting Standard Codification, which indicates that the entire amount of a cumulative translation adjustment related to an entity’s investment in a foreign entity should be released when there has been a (i) sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity, (ii) loss of a controlling financial interest in an investment in a foreign entity, or (iii) step acquisition for a foreign entity. The amendments are effective prospectively for fiscal years beginning after December 15, 2013. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact to the Company’s consolidated financial statements.

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2013
Discontinued Operations	'
	Note 4. Discontinued operations
	In the fourth quarter of 2011, the Company initiated a plan to sell a component of its business, Broadband, a subsidiary in China. The Company decided to sell Broadband because the nature of its operations was different than the core technology and strategy of the Company. On January 11, 2012, the Company entered into a purchase agreement with Guangdong Rainbow Electronic Ltd. (Rainbow) to dispose of its 100% equity interest in Broadband for a total cash consideration of RMB 13.0 million ($2.1 million). The transaction closed on March 13, 2012. The Company recognized a gain of $0.6 million on the sale of Broadband, representing the difference between the consideration received and the net assets transferred to Rainbow, net of tax. The gain was included in income from discontinued operations, net of tax in the statement of operations for the three months ended March 31, 2012.
	The results of operations associated with Broadband are presented as discontinued operations in the Company’s consolidated statements of operations for the three months ended March 31, 2013 and 2012. Revenue and the components of net income related to the discontinued operations for all periods were as follows (in thousands):
		Three months ended
		March 31,
		2013		2012
	Revenue	$	—	$	590
	Income from discontinued operations before income taxes		—		284
	Provision for income taxes		—		(114	)
	Net income from discontinued operations	$	—	$	170
	Basic and diluted net income per share on discontinued operations	$	—	$	0.01

Cash_equivalents_and_investmen

Cash equivalents and investments and fair value disclosures	3 Months Ended
	Mar. 31, 2013
Cash Equivalents and Investments and Fair Value Disclosures	'
	Note 5. Cash equivalents and investments and fair value disclosures
	Cash and cash equivalents
	The following table summarizes the Company’s unrealized gains and losses related to the cash equivalents and investments in marketable securities designated as available-for-sale (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Amortized		Gross		Gross			Fair		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value		Cost		Unrealized		Unrealized			Value
				Gains		Losses							Gains		Losses
	Cash and cash equivalents
	Money market funds	$	11	$	—	$	—		$	11	$	11	$	—	$	—		$	11
	Short-term investments
	Money market funds		4,858		—		—			4,858		7,259		—		—			7,259
	Corporate bonds		27,411		49		(6	)		27,454		23,151		43		(1	)		23,193
	U.S. federal agencies		14,138		5		—			14,143		27,241		10		—			27,251
	Foreign bonds and notes		—		—		—			—		4,682		14		—			4,696
	Municipal obligations		1,901		—		—			1,901		1,902		—		—			1,902
	Total investments in short-term investments		48,308		54		(6	)		48,356		64,235		67		(1	)		64,301
	Total investments	$	48,319	$	54	$	(6	)	$	48,367	$	64,246	$	67	$	(1	)	$	64,312
	As of March 31, 2013 and December 31, 2012, maturities of short-term investments are as follows (in thousands):
		March 31,		December 31,
		2013		2012
	Less than 1 year	$	39,647	$	51,861
	Due in 1 to 2 years		4,811		10,550
	Due in 2 to 5 years		2,008		—
	Due after 5 years		1,901		1,901
	Total	$	48,367	$	64,312
	The Company may sell its security investments in the future to fund future operation needs. As a result, the Company recorded all its marketable securities in short-term investment as of March 31, 2013 and December 31, 2012, regardless of the contractual maturity date of the securities.
	Realized gains and losses on the sale of marketable securities during the three months ended March 31, 2013 and 2012 were immaterial. The Company did not recognize any impairment losses on its marketable securities during the three months ended March 31, 2013 and 2012. As of March 31, 2013, the Company did not have any investments in marketable securities that were in an unrealized loss position for a period in excess of 12 months.
	Fair value disclosures
	The following table sets forth the fair value of the Company’s financial assets as of the dates presented (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Level 1		Level 2		Level 3			Total		Level 1		Level 2		Level 3			Total
	Money market funds	$	4,869	$	—	$	—		$	4,869	$	7,270	$	—	$	—		$	7,270
	Marketable securities
	Corporate bonds		—		27,454		—			27,454		—		23,193		—			23,193
	U.S. federal agencies		—		14,143		—			14,143		—		27,251		—			27,251
	Foreign bonds and notes		—		—		—			—		—		4,696		—			4,696
	Municipal obligations		—		1,901		—			1,901		—		1,902		—			1,902
		$	4,869	$	43,498	$	—		$	48,367	$	7,270	$	57,042	$	—		$	64,312
	Additionally, the Company’s cash and cash equivalents at March 31, 2013 and December 31, 2012 included time deposits of $11.9 million and $14.7 million, respectively, for which the fair value approximates the carrying amount using inputs classified as level 2 in the fair value hierarchy.
	The following table sets forth the fair value of the Company’s financial liabilities as of the dates presented (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Level 1		Level 2		Level 3			Total		Level 1		Level 2		Level 3			Total
	Contingent consideration (Note 10)	$	—	$	—	$	959		$	959	$	—	$	—	$	959		$	959
	Penalty payment derivative (Note 11)	$	—	$	—	$	138		$	138	$	—	$	—	$	138		$	138

Net_income_Loss_Per_Share_Attr

Net income (Loss) Per Share Attributable to NeoPhotonics Corporation Common Stockholders	3 Months Ended
	Mar. 31, 2013
Net Income (Loss) Per Share Attributable to NeoPhotonics Corporation Common Stockholders	'
	Note 6. Net income (loss) per share attributable to NeoPhotonics Corporation common stockholders
	The following table sets forth the computation of the basic and diluted net loss per share for the periods indicated (in thousands, except share and per share amounts):
		Three months ended
		March 31,
		2013			2012
	Numerator:
	Loss from continuing operations	$	(12,240	)	$	(11,778	)
	Income from discontinued operations, net of tax		—			170
	Net loss	$	(12,240	)	$	(11,608	)
	Denominator:
	Weighted average shares used to compute basic and diluted net income (loss) per share		30,574,032			24,870,684
	Basic and diluted net income (loss) per share:
	Continuing operations	$	(0.40	)	$	(0.47	)
	Discontinued operations	$	—		$	0.01
	Net loss	$	(0.40	)	$	(0.46	)
	Shares of common stock subject to repurchase resulting from the early exercise of employee stock options are not considered participating securities and are therefore excluded from the basic weighted average common shares outstanding.
	The following potentially dilutive securities were excluded from the computation of diluted net loss per share attributable to NeoPhotonics Corporation common stockholders, as their effect would have been antidilutive:
		March 31,
		2013			2012
	Employee stock options		2,758,964			2,613,907
	Restricted stock units		848,867			662,944
	Employee stock purchase plan		483,969			552,069
	Common stock warrants		4,482			4,482
			4,096,282			3,833,402

Business_Combination

Business Combination	3 Months Ended
	Mar. 31, 2013
Business Combination	'
	Note 7. Business Combination
	Optical Components Business Unit (OCU)
	On March 29, 2013 (the “closing date”) the Company acquired certain assets and assumed certain liabilities related to the Optical Components Business Unit (the “OCU”) of Lapis Semiconductor Co., Ltd., a wholly owned subsidiary of Rohm Co., Ltd (“Lapis”) of Japan with the intention of operating the OCU as an ongoing business. The business is now known as NeoPhotonics Semiconductor.
	The OCU is a leader in high speed semiconductor and high speed laser and photodetector devices for communications networks. The Company believes the acquisition will expand the Company’s solutions for high speed telecom and datacom applications and strengthen the Company’s customer base in Japan.
	Total consideration for the OCU was approximately $24.3 million, including cash of $14.1 million paid upon closing and notes payable of $11.1 million, partially offset by a net receivable from Lapis of $1.0 million related to a working capital adjustment and certain other payments between the Company and Lapis. The cash of $14.1 million includes $2.0 million that was withheld and placed into escrow to cover certain indemnity obligations from the closing date through March 29, 2014. The notes payable of $11.1 million are to be paid in three equal installments on the first, second and third anniversaries of the closing date. Each year an additional amount calculated as 1.5% per year of the unpaid balance of the notes becomes due. Lapis retains a lien on the land and building sold until the third payment is paid. The purchase price consideration and payment of notes payable are denominated in Japanese Yen.
	In connection with the acquisition, the Company incurred approximately $4.5 million in acquisition-related transaction costs related to investment banking, legal, accounting and other professional services and fees and transfer and acquisition taxes related to real property acquired. The acquisition costs were expensed as incurred and were included in operating expenses in the Company’s condensed consolidated statement of operations in the first quarter of 2013.
	The OCU’s results of operations between the closing date of March 29, 2013 and the Company’s quarter end date of March 31, 2013 were immaterial.
	Assets Acquired and Liabilities Assumed
	The Company accounted for its acquisition of the OCU assets and assumed liabilities as a business combination. The OCU’s tangible and identifiable intangible assets acquired and liabilities assumed were recorded based upon their estimated fair values as of the closing date of the acquisition. After consideration of the purchase accounting corrections (see Note 2) the estimated fair values of the identifiable assets acquired and liabilities assumed approximated the purchase price; therefore, no goodwill was recorded.  A preliminary assessment of the fair value of assets acquired and liabilities assumed (“initial preliminary fair value assessment”) was made as of March 29, 2013.
	During the quarter ended September 30, 2013 the Company updated its initial preliminary fair value assessment and has reflected the resulting measurement period adjustments as Revisions in the accompanying March 31, 2013 condensed consolidated balance sheet.  These adjustments were based on additional information received subsequent to the Company’s initial assessment that had a significant impact on a number of assumptions, including those related to inventory obsolescence, gross margin and working capital.  The adjustments include a decrease in the fair value of inventory of $6.7 million and increases in the fair value of property, plant and equipment of $2.8 million and customer relationships of $1.7 million.
	The following table summarizes the acquisition accounting and the tangible and intangible assets acquired (in thousands):
	Total purchase consideration:
	Cash paid upon closing		$	14,087
	Net receivable from Lapis			(959	)
	Notes payable			11,130
			$	24,258
	Liabilities assumed:
	Pension and retirement obligations		$	6,471
	Other compensation-related liabilities			1,083
	Other current liabilities			1,265
			$	8,819
	Fair value of assets acquired:
	Inventory		$	13,309
	Other current assets			35
	Land, property, plant and equipment(1)			14,433
	Intangible assets acquired:
	Developed technology			2,120
	Customer relationships			3,180
			$	33,077
	-1	Includes land of $3.5 million, buildings of $3.9 million and machinery, equipment, furniture and fixtures of $7.0 million.
	The approach for measuring the fair value of the assets acquired and liabilities assumed is described below:
	Net Tangible Assets
	The OCU’s tangible assets acquired and liabilities assumed as of March 29, 2013 were recorded at estimated fair value with the exception of the pension and retirement obligations. The Company estimated fair value by adjusting the OCU’s historical value of property, plant and equipment to an estimate of depreciated replacement cost, adjusted for economic obsolescence. The Company depreciates property, plant and equipment over estimated lives of 2 to 10 years, and records the expense to cost of goods sold and operating expense. The fair value of inventory acquired was determined using a net realizable value approach based upon the expected sales value of the inventory, less any costs to complete and selling costs along with a reasonable profit margin based on historical and expected results. The fair value of accrued liabilities approximated the amounts due under the arrangements with employees and vendors due to short maturity. Pensions and retirement obligations are recorded to the extent the projected benefit obligation exceeded the fair value of the plan assets estimated as of March 29, 2013. The projected benefit obligation is measured at the actuarial present value of all benefits attributed by the plan's benefit formula to employee service rendered before March 29, 2013.
	Intangible Assets
	Developed technology represents products that have reached technological feasibility. The OCU’s current product offerings include high speed semiconductor and high speed laser and photodetector devices for communication networks. The fair value of developed technology intangibles acquired was determined by using a royalty-avoidance method. The share of future revenue relating to current technology was forecasted, using an estimate for obsolescence such that the share declines over time. A royalty rate of two percent was used to calculate royalty savings on that revenue that are avoided since the Company owns the technology and does not need to license it from other parties. The after-tax royalty savings was then discounted to present value using the Company’s discount rate. The Company amortizes the developed technology intangible assets over estimated lives of 4 to 5 years, and amortization expense is recorded to cost of goods sold.
	The customer relationships asset represents the value of the ability to sell existing, in-process, and future versions of the technology to the OCU existing customer base. The Company utilized the excess earnings method, estimating future cash flows that will result from existing customers given assumed retention rates, and then discounting those flows to their present value using the Company’s discount rate. The Company amortizes the customer relationships intangible asset over an average estimated life of 6 years, and amortization expense is recorded to operating expenses.
	The weighted average amortization period for the total amount of intangible assets acquired is 5.4 years.
	Pro Forma Financial Information
	The unaudited financial information in the table below summarizes the combined results of operations of the Company with the results of OCU prior to the acquisition, on a pro forma basis, as though the companies had been combined as of the beginning of the period presented. The pro forma financial information for the quarter ended March 31, 2013 includes elimination of $4.5 million of transaction costs and $1.9 million of revenue and $1.8 million of costs related to sales from OCU to the Company.  The pro forma financial information for the quarter ended March 31, 2012 includes elimination of $0.4 million of revenue and $0.3 million of costs related to sales from OCU to the Company and a $2.5 million increase in cost of goods sold due to a change in the value of inventory as a result of acquisition accounting.  The pro forma financial information is presented for informational purposes only and is not indicative of the results of operations that would have been achieved had the acquisition taken place at the beginning of the period presented, nor does it intend to be a projection of future results.
			For the three months ended
			March 31,
			2013			2012
	Revenue		$	68,754		$	67,537
	Net loss		$	(5,277	)	$	(12,038	)
	Basic and diluted net loss per share		$	(0.17	)	$	(0.48	)

Balance_sheet_components

Balance sheet components	3 Months Ended
	Mar. 31, 2013
Balance sheet components	'
	Note 8. Balance sheet components
	Accounts receivable, net
	Accounts receivable, net consists of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Accounts receivable		$	58,878		$	66,338
	Trade notes receivable			5,375			4,979
	Allowance for doubtful accounts			(986	)		(963	)
			$	63,267		$	70,354
	Inventories
	Inventories consist of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Raw materials		$	26,332		$	20,520
	Work in process			20,560			8,603
	Finished goods (1)			14,967			14,670
			$	61,859		$	43,793
	-1	Finished goods inventory at offsite managed inventory locations was $4.8 million and $4.5 million as of March 31, 2013 and December 31, 2012, respectively.
	Purchased intangible assets
	Purchased intangible assets consist of the following (in thousands):
			March 31, 2013								December 31, 2012
			Gross			Accumulated			Net		Gross		Accumulated			Net
			Assets			Amortization			Assets		Assets		Amortization			Assets
	Technology and patents		$	34,295		$	(23,405	)	$	10,890	$	32,176	$	(22,869	)	$	9,307
	Customer relationships			15,128			(8,392	)		6,736		11,898		(8,148	)		3,750
	Leasehold interest			1,358			(234	)		1,124		1,355		(241	)		1,114
	Noncompete agreements			950			(934	)		16		950		(908	)		42
			$	51,731		$	(32,965	)	$	18,766	$	46,379	$	(32,166	)	$	14,213
	Amortization expense relating to technology and patents and the leasehold interest intangible assets is included within cost of goods sold, and customer relationships and the noncompete agreements within operating expenses. The following table presents details of the amortization expense of the Company’s purchased intangible assets as reported in the condensed consolidated statements of operations (in thousands):
			Three months ended
			March 31,
			2013			2012
	Cost of goods sold		$	428		$	598
	Operating expenses			321			354
	Total		$	749		$	952
	The estimated future amortization expense of purchased intangible assets as of March 31, 2013, is as follows (in thousands):
	2013 (remaining 9 months)		$	3,617
	2014			4,505
	2015			4,490
	2016			3,743
	2017			814
	Thereafter			1,597
			$	18,766
	Accrued and other current liabilities
	Accrued and other current liabilities consist of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Employee-related		$	9,731		$	12,293
	Other			15,143			7,666
			$	24,874		$	19,959
	Warranty Accrual
	The Company provides warranties to cover defects in workmanship, materials and manufacturing for a period of one to two years to meet the stated functionality as agreed to in each sales arrangement. Products are tested against specified functionality requirements prior to delivery, but the Company nevertheless from time to time experiences claims under its warranty guarantees. The Company accrues for estimated warranty costs under those guarantees based upon historical experience, and for specific items, at the time their existence is known and the amounts are determinable.
	The table below summarizes the movement in the warranty accrual (in thousands):
			Three months ended
			March 31,
			2013			2012
	Beginning balance		$	1,072		$	1,443
	Warranty accruals			26			19
	Settlements and adjustments			86			(247	)
	Ending balance		$	1,184		$	1,215
	Restructuring charges
	During the three months ended March 31, 2013, the Company exited and closed one facility at its headquarters location to align its facilities usage with its current size. As a result, the Company recorded a restructuring charge related to the facility impairment of approximately $0.3 million. As of March 31, 2013, the remaining balance of this restructuring obligation was $0.3 million, which the Company expects to pay through 2015.
	Other noncurrent liabilities
Other noncurrent liabilities consist of the following (in thousands):
		March 31,			December 31,
		2013			2012
Employee-related		$	6,712		$	188
Penalty payment derivative (Note 11)			138			138
Other			1,297			1,536
		$	8,147		$	1,862

Debt

Debt	3 Months Ended
	Mar. 31, 2013
Debt	'
	Note 9. Debt
	The Company records debt at its carrying amount. The Company uses a market approach to determine fair value, which results in a Level 2 fair value measurement. The following table provides the components of debt, obligations, weighted average interest rate and additional fair value information relating to the Company’s outstanding debt instruments (in thousands, except percentages):
			March 31, 2013							December 31, 2012
			Carrying		Fair		Weighted			Carrying		Fair		Weighted
			Amount		Value		Average			Amount		Value		Average
							Interest							Interest
							Rate							Rate
	Notes payable		$	10,431	$	10,431				$	12,003	$	12,003
	Notes payable related to OCU acquisition			3,710		3,710		1.5	%		-		-
	Short-term debt			5,250		5,250		5	%		5,000		4,892		2.2	%
	Total short-term debt		$	8,960	$	8,960				$	5,000	$	4,892
	Long-term notes payable related to OCU acquisition			7,420		7,420		1.5	%		-		-
	Long-term debt			34,750		34,750		4.91	%		17,167		16,336		2.2	%
	Total long-term debt		$	42,170	$	42,170				$	17,167	$	16,336
	Notes payable
	The Company frequently directs its banking partners to issue notes payable to its suppliers in China in exchange for accounts payable. These banks issue notes to vendors and issue payment to the vendors upon redemption. The Company owes the payable balance to the issuing bank. These notes are unsecured, noninterest bearing and are due approximately six months after issuance. As a condition of the notes payable lending arrangements, the Company is required to keep a compensating balance at the issuing banks that is a percentage of the total notes payable balance until the notes payable are paid by its subsidiaries in China.  These balances are classified as restricted cash on the Company’s condensed consolidated balance sheets.  As of March 31, 2013, restricted cash totaled $2.1 million.
	Notes payable for OCU acquisition
	In connection with the acquisition of OCU on March 29, 2013, the Company is obligated to pay $11.1 million in three equal installments on the first, second and third anniversaries of the closing date for the purchase of the real estate used by the OCU. The payment is denominated in Japanese Yen. The amount presented in the table is the short-term portion of $3.7 million and the long-term portion of $7.4 million. The obligation bears interest at 1.5% per year and the real property is security for the loan.
	Long-term debt
	The Company has lending arrangements with several financial institutions, including a loan and security agreement with Comerica Bank in the U.S., which has been amended several times. As of December 31, 2012, the Company’s loan and security agreement in the U.S. included the following components:
		·		As of December 31, 2012, $8.0 million was outstanding under the revolving line of credit agreement and $0.0 million was available for borrowing. Borrowings under this facility bear interest at a rate of LIBOR plus 2%.
		·		As of December 31, 2012, no amounts were outstanding under the equipment advance line advance and all $7.0 million was available for borrowing. Borrowings under this facility would bear interest at a rate of LIBOR plus 2%.
		·		As of December 31, 2012, $14.2 million was outstanding under the acquisition advance and $5.8 million was available for borrowing. The advances bear interest at a rate of LIBOR plus 2%.
	On March 21, 2013, the Company amended and restated in its entirety the Loan and Security Agreement with the same bank and added East-West Bank as a lender. The components of the available credit facilities as of March 31, 2013 are as follows:
		·		As of March 31, 2013, $12.0 million was outstanding under the revolving line of credit agreement and $8.0 million was available for borrowing. Amounts are due on or before March 2016 and borrowings under this revolving line of credit include an interest rate option of a base rate as defined in the agreement plus 1.5% or LIBOR plus 2.5%.
		·		As of March 31, 2013, $28.0 million was outstanding under the term loan of the credit facility and interest is payable quarterly in arrears; the principal is paid in equal quarterly installments over the term of the loan ending in June 2017. Borrowings under the term loan include an interest rate option of a base rate as defined in the agreement plus 1.75% or LIBOR plus 2.75%.
	The Company’s U.S. loan and security agreement requires it to maintain specified financial covenants, including a liquidity ratio, restricts its ability to incur additional debt or to engage in specified transactions and is secured by substantially all of its U.S. assets, other than intellectual property assets. As of March 31, 2013 and December 31, 2012, the Company was in compliance with the covenants contained in this agreement.
	In connection with the original loan and security agreement in 2007, the Company issued a warrant to Comerica Bank to purchase 4,482 shares of common stock at an exercise price of $29.00 per share. As of March 31, 2013, the warrant had not been exercised.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2013
Commitments and Contingencies	'
	Note 10. Commitments and contingencies
	Leases
	The Company leases various facilities under noncancelable operating leases. As of March 31, 2013, the future minimum commitments under all operating leases are as follows (in thousands):
	2013 (remaining 9 months)	$	1,593
	2014		1,385
	2015		1,188
	2016		666
	2017		500
	Thereafter		968
		$	6,300
	Rent expense under the Company’s operating leases was $0.6 million and $0.5 million for the three months ended March 31, 2013 and 2012, respectively.
	Litigation
	From time to time, the Company is subject to various claims and legal proceedings, either asserted or unasserted, that arise in the ordinary course of business. The Company accrues for legal contingencies if the Company can estimate the potential liability and if the Company believes it is more likely than not that the case will be ruled against it. If a legal claim for which the Company did not accrue is resolved against it, the Company would record the expense in the period in which the ruling was made. The Company does not believe that the ultimate amount of liability, if any, for any pending claims of any type (alone or combined) will materially affect the Company’s financial position, results of operations or cash flows. The ultimate outcome of any litigation is uncertain, however, and unfavorable outcomes could have a material negative impact on the Company’s financial condition and operating results. Regardless of outcome, litigation can have an adverse impact on the Company because of defense costs, negative publicity, diversion of management resources and other factors.
	On January 5, 2010, Finisar Corporation, or Finisar, filed a complaint in the U.S. District Court for the Northern District of California against Source Photonics, Inc., MRV Communications, Inc., Oplink Communications, Inc. and the Company, or collectively, the co-defendants. In the complaint, Finisar alleged infringement of certain of its U.S. patents arising from the codefendants’ respective manufacture, importation, use, sale of or offer to sell certain optical transceiver products. Finisar sought to recover unspecified damages, up to treble the amount of actual damages, together with attorneys’ fees, interest and costs. Finisar alleged that at least some of the patents asserted are a part of certain digital diagnostic standards for optoelectronics transceivers, and, therefore, are being utilized in such digital diagnostic standards. On March 23, 2010, the Company filed an answer to the complaint and counterclaims, asserting two claims of patent infringement and additional claims asserting that Finisar has violated state and federal competition laws and violated its obligations to license on reasonable and non-discriminatory terms. On May 5, 2010, the court dismissed without prejudice all co-defendants (including the Company) except Source Photonics, Inc., on grounds that such claims should have been asserted in four separate lawsuits, one against each defendant. This dismissal without prejudice does not prevent Finisar from bringing a new similar lawsuit against the Company. The Company and Finisar had agreed to suspend their respective claims for a 90 day period and not to refile the originally asserted claims against each other until one or more specified events occur resulting in the partial or complete resolution of the litigation between Source Photonics and Finisar. On September 10, 2010, Source Photonics and Finisar settled their lawsuit, commencing the suspension period, which ended in December 2010. On January 18, 2011, the Company and Finisar again agreed to suspend their respective claims and not to refile the originally asserted claims against each other until at least 90 days after one or more specified events occur resulting in the partial or complete resolution of litigation involving the same Finisar patents between Oplink Communications, Inc. and Finisar. This tolling period expired on April 30, 2012. On May 3, 2012 the Company and Finisar agreed to further toll their respective claims until the refiling of certain of the previously asserted claims from this dispute. As a result, Finisar is permitted to bring a new lawsuit against the Company if it chooses to do so, and the Company may bring new claims against Finisar upon seven days written notice prior to filing such claims. The Company is currently unable to predict the outcome of this dispute and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.
	Indemnifications
	In the normal course of business, the Company enters into agreements that contain a variety of representations and warranties and provide for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future, but have not yet been made. To date, the Company has not paid any claims or been required to defend any action related to its indemnification obligations. However, the Company may record charges in the future as a result of these indemnification obligations. As of March 31, 2013, the Company does not have any material indemnification claims that were probable or reasonably possible.
	Purchase obligations
	The Company has purchase obligations with certain suppliers for the purchase of goods and services entered in the ordinary course of business. As of March 31, 2013, total outstanding purchase obligations were $26.2 million, primarily due within the next 12 months.
	Other contingencies
	In connection with the Company’s acquisition of Santur that the Company completed in October 2011, the Company may be required to pay up to an additional $7.5 million in cash as further consideration for the business acquisition, contingent upon Santur’s gross profit performance during 2012. The fair value of the contingent consideration is re-measured each reporting period and any changes in the fair value of the contingent consideration are recognized as a gain or loss in the consolidated statements of operations. As of March 31, 2013 and December 31, 2012, the Company estimated the fair value of the contingent consideration was $1.0 million and $1.0 million, respectively, and has included this liability within accrued and other current liabilities in its condensed consolidated balance sheets.   The Company classifies this liability within level 3 as it is valued using significant unobservable inputs.  To estimate the fair value, the Company used Santur’s gross profit as defined in the acquisition agreement and an estimated discount rate. Although the Company believes the fair value of the contingent consideration is in accordance with the terms of the Santur acquisition agreements, the selling parties dispute the final amount to be paid. Any adjustment to the fair value of the contingent consideration may impact the results of operations in the period the adjustment is made.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2013
Stockholders' Equity	'
	Note 11. Stockholders’ equity
	Common Stock
	As of March 31, 2013, the Company had reserved the following shares of authorized but unissued common stock:
		Common Stock
	Stock option plans		5,088,612
	Stock purchase plan		257,734
	Warrants		4,482
			5,350,828
	Private Sale of Common Stock
	On April 27, 2012, the Company issued and sold approximately 4.97 million shares of its common stock in a private placement transaction at a price of $8.00 per share for a gross amount of approximately $39.8 million.
	The shares of common stock are restricted from transfer pursuant to a lockup agreement for up to two years, at the end of which the Company is obligated to file one or more registration statements covering the potential resale of the shares of common stock.
	In connection with this private placement transaction, the Company agreed to certain performance obligations including establishing a wholly-owned subsidiary in the Russian Federation and making a $30.0 million investment commitment (the ‘Investment Obligation’) towards the Company’s Russian operations. The Investment Obligation can be partially satisfied by investment outside of the Russian Federation and/or by way of non-cash asset transfers, including but not limited to capital equipment, small tools, intellectual property, and other intangibles.  A minimum of $15.0 million of the Investment Obligation is required to be satisfied by making capital expenditures and the remaining $15.0 million can be satisfied through general working capital and research and development expenditures.  All of the amount for general working capital can be spent either inside or outside of Russia.  However, at least 80% of the amount expended for research and development expenditure must be spent inside Russia.  General working capital can include acquisition of other businesses or portions thereof to be owned by the Russian subsidiary.
	The purchaser of the common stock has non-transferable veto rights over the Company’s Russian subsidiary’s annual budget during the investment period and must approve non-cash asset transfers to be made in satisfaction of the Investment Obligation.  Spending and/or commitments to spend for general working capital and research and development do not require approval by the purchaser. There are no legal restrictions on the specific usage of the $39.8 million received in the private placement transaction or on withdrawal from the Company’s bank accounts for use in general corporate purposes.
	The Company is required to satisfy the Investment Obligation by July 31, 2014 or, in the event the Company has not recorded aggregate revenue from sales of its products in the Russian Federation of at least $26.8 million during the period beginning July 1, 2012 and ending June 30, 2014, then will be automatically extended from July 31, 2014 to March 31, 2015. The Company expects the date for achievement of the Investment Obligation will be extended to March 31, 2015. Therefore, the Company intends to meet its Investment Obligation by March 31, 2015.  If the Company fails to meet the Investment Obligation by the deadline, including failure to meet the Investment Obligation because the purchaser of the common stock does not approve the transfer of non-cash assets, the Company will be required to pay a $5.0 million penalty (the ‘Penalty Payment’) as the sole and exclusive remedy for damages and monetary relief available to the purchaser for failure to meet the Investment Obligation.
	The Company has accounted for the $5.0 million Penalty Payment as an embedded derivative instrument, with the underlying being the performance or nonperformance of meeting the Investment Obligation by the extended deadline of March 31, 2015 and has classified $4.9 million of the $5.0 million as additional paid-in capital and the remaining $0.1 million, representing the estimated fair value of the Penalty Payment derivative, as other noncurrent liabilities.
	The fair value of the Penalty Payment derivative has been estimated at the date of the original common stock sale (April 27, 2012) and at each subsequent balance sheet date using a probability-weighted discounted future cash flow approach using unobservable inputs, which are classified as Level 3 within the fair value hierarchy. The primary inputs for this approach include the probability of achieving the Investment Obligation and a discount rate that approximates the Company’s incremental borrowing rate. After the initial measurement, changes in the fair value of this derivative were recorded in other income (expense). The change in fair value of the Penalty Payment derivative from April 27, 2012 to December 31, 2012 and to March 31, 2013 was not significant.
	Accumulated Deficit
	Approximately $6.3 million of the Company’s accumulated deficit at December 31, 2012 was subject to restriction due to the fact that the Company’s subsidiaries in China are required to set aside at least 10% of their respective accumulated profits each year to fund statutory common reserves as well as allocate a discretional portion of their after-tax profits to their staff welfare and bonus fund.
	Equity Incentive Programs
	The Company grants stock options, restricted stock units, stock appreciation units and stock purchase rights pursuant to stockholder and board approved equity incentive plans. These equity incentive plans are described in further detail in Note 12 of the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012.
	Stock options and restricted stock units
	The following table summarizes the Company’s stock option activity during the three months ended March 31, 2013:
					Stock Options					Restricted Stock Units
		Shares			Number			Weighted		Number			Weighted
		available for			of			average		of			average
		grant			shares			exercise		units			grant
								price					date fair
													value
	Balance at December 31, 2012		382,668			2,773,887		$	5.87		924,823		$	5.84
	Authorized for issuance		1,069,115			-			0		-			0
	Granted		(30,000	)		17,800			5.6		12,200			5.74
	Exercised/Converted		-			(18,251	)		4.32		(51,634	)		6.12
	Forfeited		58,998			(14,472	)		8.43		(36,522	)		5.84
	Balance at March 31, 2013		1,480,781			2,758,964		$	5.86		848,867		$	5.82
	The following table summarizes information about stock options outstanding as of March 31, 2013:
		Options Outstanding
		Number			Weighted			Weighted		Aggregate
		of			average			average		intrinsic value
		shares			exercise price			remaining		(in thousands)
								contractual
								term
								(years)
	Vested and expected to vest		2,700,303		$	5.87			6.39	$	1,228
	Exercisable		1,902,220		$	5.67			5.5	$	1,143
	The intrinsic value of options vested and expected to vest and exercisable as of March 31, 2013 is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of March 31, 2013. The intrinsic value of options exercised during the three months ended March 31, 2013 and 2012 was $16,000 and $14,000, respectively.
	The following table summarizes information about restricted stock units outstanding as of March 31, 2013:
		Restricted Stock Units Outstanding
		Number			Weighted			Weighted		Aggregate
		of			average			average		intrinsic value
		shares			grant date			remaining		(in thousands)
					fair value			contractual
								term
								(years)
	Vested and expected to vest		782,071		$	5.82			1.15	$	3,996
	The intrinsic value of restricted stock units vested and expected to vest as of March 31, 2013 is calculated based on the fair value of the Company’s common stock as of March 31, 2013. The intrinsic value of restricted stock units converted during the three months ended March 31, 2013 and 2012 was $301,000 and $0, respectively.
	Stock appreciation units
	The following table summarizes the Company’s stock appreciation unit activity during the three months ended March 31, 2013:
		Stock			Weighted
		Appreciation			average
		Units			exercise
					price
	Stock appreciation units outstanding as of December 31, 2012		212,534		$	7.07
	Stock appreciation units cancelled		(4,423	)		8.93
Stock appreciation units exercised		(316	)		4.25
Stock appreciation units outstanding as of March 31, 2013		207,795		$	7.04
The following table summarizes information about stock appreciation units outstanding as of March 31, 2013:
	Stock Appreciation Units Outstanding
	Number			Weighted			Weighted		Aggregate
	of			average			average		intrinsic value
	units			exercise price			remaining		(in thousands)
							contractual
							term
							(years)
Vested and expected to vest		207,396		$	7.03			5.86	$	101
Exercisable		181,913		$	6.71			5.69	$	98
The intrinsic value of stock appreciation units vested and expected to vest and exercisable as of March 31, 2013 is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of March 31, 2013. The intrinsic value of stock appreciation units exercised during the three months ended March 31, 2013 and 2012 was $0 and $6,000, respectively.

StockBased_compensation

Stock-Based compensation	3 Months Ended
	Mar. 31, 2013
Stock-Based Compensation	'
	Note 12. Stock-based compensation
	Stock-based compensation expense
	The Company’s stock-based compensation expense was recorded as follows (in thousands):
		Three months ended
		March 31,
	(in thousands)	2013			2012
	Cost of goods sold	$	243		$	188
	Research and development		418			469
	Sales and marketing		238			209
	General and administrative		303			278
		$	1,202		$	1,144
	Stock options
	The following tables summarize the components of stock-based compensation expense for stock options for the three months ended March 31, 2013 and 2012, respectively (in thousands):
		Three months ended
		March 31,
		2013			2012
	Cost of goods sold	$	79		$	61
	Research and development		174			209
	Sales and marketing		78			94
	General and administrative		173			174
		$	504		$	538
	The weighted-average fair value of options granted was $3.80 and $4.33 per share for the three months ended March 31, 2013 and 2012, respectively. At March 31, 2013, there was $3.1 million of unrecognized stock-based compensation expense that will be recognized over the remaining weighted-average period of 2.41 years.
	The Company estimated the fair value of all employee stock options using a Black-Scholes valuation model with the following assumptions:
		Three months ended
		March 31,
	Stock Options	2013			2012
	Weighted-average expected term (years)		6.55			6.71
	Weighted-average volatility		76	%		71	%
	Risk-free interest rate		1.08	%		1.81	%
	Expected dividends		0	%		0	%
	Expected term. The expected term was estimated using the Company’s historical and expected future exercise behavior.
	Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
	Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
	Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
	The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. All stock-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods.
	Stock appreciation units
	Stock appreciation units are remeasured each period at fair value. The following table summarizes the expense (credit) recognized for stock appreciation units for the three months ended March 31, 2013 (in thousands):
		Three months ended
		March 31,
		2013			2012
	Cost of goods sold	$	(24	)	$	(5	)
	Research and development		(32	)		(9	)
	Sales and marketing		(13	)		(4	)
	General and administrative		(9	)		(3	)
		$	(78	)	$	(21	)
	As of March 31, 2013 and December 31, 2012, the liabilities for the settlement of the stock appreciation units were $0.3 million and $0.4 million, respectively and were included in accrued and other current liabilities on the condensed consolidated balance sheet.
	Based on the fair value of the stock appreciation units as of March 31, 2013, the Company had $0.05 million of unrecognized stock-based compensation expense that would be recognized over the remaining weighted-average period of 1.10 years. The Company estimated the fair value of all employee stock appreciation units using a Black-Scholes valuation model with the following assumptions:
		Three months ended
		March 31,
	Stock appreciation units	2013		2012
	Weighted-average expected term (years)	2.61		3.39
	Weighted-average volatility	63%		69%
	Risk-free interest rate	0.20 - 0.46%		0.42 - 1.04%
	Expected dividends	0%		0%
	Expected term. Vested stock appreciation units first become exercisable upon the expiration of the lock-up period associated with the initial public offering. Therefore, the Company estimated the term of the award based on an average of the weighted-average exercise period and the remaining contractual term.
	Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
	Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
	Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
	Employee stock purchase plan (“ESPP”)
	The following tables summarize the components of ESPP expense for the three months ended March 31, 2013 and 2012, respectively (in thousands):
		Three months ended
		March  31,
		2013			2012
Cost of goods sold	$	80		$	67
Research and development		120			176
Sales and marketing		38			40
General and administrative		40			37
	$	278		$	320
As of March 31, 2013 there was $0.4 million of unrecognized stock-based compensation expense for stock purchase rights that will be recognized over the remaining offering period, through November 2013.
The value of the stock purchase right consists of: (1) the 15% discount on the purchase of the stock, (2) 85% of the call option and (3) 15% of the put option. The call option and put option were valued using the Black-Scholes option pricing model with the following assumptions:
	Three months ended
	March 31,
Stock purchase rights	2013		2012
Weighted-average expected term (years)	0.74		0.72
Weighted-average volatility	48%		71%
Risk-free interest rate	0.13 - 0.16%		0.04 - 0.11%
Expected dividends	0%		0%
Expected term. The expected term represents the period of time from the beginning of the offering period to the purchase date.
Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
Restricted stock units
The following table summarizes the stock-based compensation expense recognized for restricted stock units for the three months ended March 31, 2013 (in thousands):
	Three months ended
	March  31,
	2013			2012
Cost of goods sold	$	108		$	65
Research and development		156			93
Sales and marketing		135			79
General and administrative		99			70
	$	498		$	307
The weighted-average fair value of restricted stock units granted was $5.74 and $6.10 per share for the three months ended March 31, 2013 and 2012, respectively. At March 31, 2013, the Company has $3.3 million of unrecognized stock-based compensation expense that will be recognized over the remaining weighted-average period of 1.92 years.

Income_taxes

Income taxes	3 Months Ended
	Mar. 31, 2013
Income Taxes	'
	Note 13. Income taxes
	The Company’s income tax expense for the three months ended March 31, 2013 is primarily related to income taxes of the Company’s non-U.S. operations. The Company recorded an income tax provision of $183,000 and an income tax benefit of $60,000 for the three months ended March 31, 2013 and 2012, respectively.
	(in thousands, except percentages)	Three months ended
		March 31,
		2013			2012
	Income tax (expense) benefit	$	(183	)	$	60
	Effective tax rate		2	%		1	%
	The Company’s income tax expense in 2013 was primarily related to income taxes of the Company’s non-US operations. The Company’s income tax benefit in the three months ended March 31, 2012 was due to the loss before income taxes realized in the Company’s foreign subsidiaries.
	The Company conducts its business globally and operating income is subject to varying rates of tax in the United States, China and Japan. Consequently, the Company’s effective tax rate is dependent upon the geographic distribution of earnings or losses and the tax laws and regulations in each geographical region. The Company expects that its income taxes will vary in relation to the Company’s profitability and the geographic distribution of its profits. Historically, the Company has experienced net losses in the United States and in the short term, the Company expects this trend to continue. One of the Company’s subsidiaries in China generates a cash tax liability. The subsidiary has qualified for a preferential 15% tax rate available for high technology enterprises as opposed to the statutory 25% tax rate.
	Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the carrying amounts of existing assets and liabilities in the financial statements and their respective tax bases using tax rates expected to be in effect during the years in which the basis differences reverse.
	Due to historic losses in the U.S., the Company has a full valuation allowance on the U.S. federal and state deferred tax assets. The Company also recorded a full valuation allowance for the deferred tax assets of the Company’s NeoPhotonics Semiconductor subsidiary as it was determined that the deferred tax assets were not more likely than not to be realized.  Management continues to evaluate the realizability of its deferred tax assets and the related valuation allowance. If management's assessment of the deferred tax assets or the corresponding valuation allowance were to change, the Company would record the related adjustment to income during the period in which management makes the determination.
	As of March 31, 2013, there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for the year ended December 31, 2012.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2013
Consolidation	'
	Consolidation
	The condensed consolidated financial statements are prepared in accordance with U.S. GAAP and include the consolidated accounts of the Company and its majority owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported revenue and expenses during the reporting period. Significant estimates made by management include: the fair values of identifiable assets acquired and liabilities assumed in business combinations; the useful lives of property, plant and equipment and intangible assets as well as future cash flows to be generated by those assets; allowances for doubtful accounts; valuation allowances for deferred tax assets; write off of excess and obsolete inventories and the valuations of stock-based compensation, among others. Actual results could differ from these estimates.
Business Combinations-Acquisition Accounting	'
	Business Combinations—Acquisition Accounting
	Under the acquisition method of accounting, the Company allocates the purchase price of acquired companies to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The Company records the excess of purchase price over the aggregate fair values of the tangible and identifiable intangible assets as goodwill. The Company determines the fair values of assets acquired and liabilities assumed. To establish fair value, the Company measures the price that would be received to sell an asset or paid to transfer a liability in an ordinary transaction between market participants. The measurement assumes the highest and best use of the asset by the market participants that would maximize the value of the asset or the group of assets within which the asset would be used at the measurement date, even if the intended use of the asset is different.
	The Company estimates the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expenses. The Company estimates the future cash flows to be derived from such assets, and these estimates are used to determine the fair value of the assets. If any of these estimates change, depreciation or amortization expenses could be changed and/or the value of our intangible assets could be impaired.
	Acquisition related costs, including real estate transaction taxes, finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees are accounted for as expenses in the periods in which the costs are incurred or the services are received.
Recent Accounting Pronouncements	'
	Recent accounting pronouncements
	In February 2013, the Financial Accounting Standard Board (“FASB”) issued amendments to the FASB Accounting Standard Codification to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendments require new disclosures for items reclassified out of accumulated other comprehensive income (“AOCI”), including (1) changes in AOCI balances by component and (2) significant items reclassified out of AOCI. The guidance does not amend any existing requirements for reporting net income or OCI in the financial statements. As this guidance only requires expanded disclosures, the adoption of this guidance did not have a material effect on the Company’s consolidated financial statements.
	In March 2013, the FASB issued amendments to the FASB Accounting Standard Codification, which indicates that the entire amount of a cumulative translation adjustment related to an entity’s investment in a foreign entity should be released when there has been a (i) sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity, (ii) loss of a controlling financial interest in an investment in a foreign entity, or (iii) step acquisition for a foreign entity. The amendments are effective prospectively for fiscal years beginning after December 15, 2013. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact to the Company’s consolidated financial statements.
Cash and Cash Equivalents and Short-term Investments	'
	The Company may sell its security investments in the future to fund future operation needs. As a result, the Company recorded all its marketable securities in short-term investment as of March 31, 2013 and December 31, 2012, regardless of the contractual maturity date of the securities.
	Realized gains and losses on the sale of marketable securities during the three months ended March 31, 2013 and 2012 were immaterial. The Company did not recognize any impairment losses on its marketable securities during the three months ended March 31, 2013 and 2012. As of March 31, 2013, the Company did not have any investments in marketable securities that were in an unrealized loss position for a period in excess of 12 months.
Earnings Per Share, Policy	'
	Shares of common stock subject to repurchase resulting from the early exercise of employee stock options are not considered participating securities and are therefore excluded from the basic weighted average common shares outstanding.
Business Combination Policy	'
	Assets Acquired and Liabilities Assumed
	The Company accounted for its acquisition of the OCU assets and assumed liabilities as a business combination. The OCU’s tangible and identifiable intangible assets acquired and liabilities assumed were recorded based upon their estimated fair values as of the closing date of the acquisition. After consideration of the purchase accounting corrections (see Note 2) the estimated fair values of the identifiable assets acquired and liabilities assumed approximated the purchase price; therefore, no goodwill was recorded.  A preliminary assessment of the fair value of assets acquired and liabilities assumed (“initial preliminary fair value assessment”) was made as of March 29, 2013.
	During the quarter ended September 30, 2013 the Company updated its initial preliminary fair value assessment and has reflected the resulting measurement period adjustments as Revisions in the accompanying March 31, 2013 condensed consolidated balance sheet.  These adjustments were based on additional information received subsequent to the Company’s initial assessment that had a significant impact on a number of assumptions, including those related to inventory obsolescence, gross margin and working capital.  The adjustments include a decrease in the fair value of inventory of $6.7 million and increases in the fair value of property, plant and equipment of $2.8 million and customer relationships of $1.7 million.
	The following table summarizes the acquisition accounting and the tangible and intangible assets acquired (in thousands):
	Total purchase consideration:
	Cash paid upon closing		$	14,087
	Net receivable from Lapis			(959	)
	Notes payable			11,130
			$	24,258
	Liabilities assumed:
	Pension and retirement obligations		$	6,471
	Other compensation-related liabilities			1,083
	Other current liabilities			1,265
			$	8,819
	Fair value of assets acquired:
	Inventory		$	13,309
	Other current assets			35
	Land, property, plant and equipment(1)			14,433
	Intangible assets acquired:
	Developed technology			2,120
	Customer relationships			3,180
			$	33,077
	-1	Includes land of $3.5 million, buildings of $3.9 million and machinery, equipment, furniture and fixtures of $7.0 million.
	The approach for measuring the fair value of the assets acquired and liabilities assumed is described below:
	Net Tangible Assets
	The OCU’s tangible assets acquired and liabilities assumed as of March 29, 2013 were recorded at estimated fair value with the exception of the pension and retirement obligations. The Company estimated fair value by adjusting the OCU’s historical value of property, plant and equipment to an estimate of depreciated replacement cost, adjusted for economic obsolescence. The Company depreciates property, plant and equipment over estimated lives of 2 to 10 years, and records the expense to cost of goods sold and operating expense. The fair value of inventory acquired was determined using a net realizable value approach based upon the expected sales value of the inventory, less any costs to complete and selling costs along with a reasonable profit margin based on historical and expected results. The fair value of accrued liabilities approximated the amounts due under the arrangements with employees and vendors due to short maturity. Pensions and retirement obligations are recorded to the extent the projected benefit obligation exceeded the fair value of the plan assets estimated as of March 29, 2013. The projected benefit obligation is measured at the actuarial present value of all benefits attributed by the plan's benefit formula to employee service rendered before March 29, 2013.
	Intangible Assets
	Developed technology represents products that have reached technological feasibility. The OCU’s current product offerings include high speed semiconductor and high speed laser and photodetector devices for communication networks. The fair value of developed technology intangibles acquired was determined by using a royalty-avoidance method. The share of future revenue relating to current technology was forecasted, using an estimate for obsolescence such that the share declines over time. A royalty rate of two percent was used to calculate royalty savings on that revenue that are avoided since the Company owns the technology and does not need to license it from other parties. The after-tax royalty savings was then discounted to present value using the Company’s discount rate. The Company amortizes the developed technology intangible assets over estimated lives of 4 to 5 years, and amortization expense is recorded to cost of goods sold.
	The customer relationships asset represents the value of the ability to sell existing, in-process, and future versions of the technology to the OCU existing customer base. The Company utilized the excess earnings method, estimating future cash flows that will result from existing customers given assumed retention rates, and then discounting those flows to their present value using the Company’s discount rate. The Company amortizes the customer relationships intangible asset over an average estimated life of 6 years, and amortization expense is recorded to operating expenses.
	The weighted average amortization period for the total amount of intangible assets acquired is 5.4 years.
Standard Product Warranty, Policy	'
	Warranty Accrual
	The Company provides warranties to cover defects in workmanship, materials and manufacturing for a period of one to two years to meet the stated functionality as agreed to in each sales arrangement. Products are tested against specified functionality requirements prior to delivery, but the Company nevertheless from time to time experiences claims under its warranty guarantees. The Company accrues for estimated warranty costs under those guarantees based upon historical experience, and for specific items, at the time their existence is known and the amounts are determinable.
Share-based Compensation, Option and Incentive Plans Policy	'
	The Company estimated the fair value of all employee stock options using a Black-Scholes valuation model with the following assumptions:
			Three months ended
			March 31,
	Stock Options		2013			2012
	Weighted-average expected term (years)			6.55			6.71
	Weighted-average volatility			76	%		71	%
	Risk-free interest rate			1.08	%		1.81	%
	Expected dividends			0	%		0	%
	Expected term. The expected term was estimated using the Company’s historical and expected future exercise behavior.
	Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
	Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
	Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
	The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. All stock-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods.
	Stock appreciation units
	Stock appreciation units are remeasured each period at fair value. The following table summarizes the expense (credit) recognized for stock appreciation units for the three months ended March 31, 2013 (in thousands):
			Three months ended
			March 31,
			2013			2012
	Cost of goods sold		$	(24	)	$	(5	)
	Research and development			(32	)		(9	)
	Sales and marketing			(13	)		(4	)
	General and administrative			(9	)		(3	)
			$	(78	)	$	(21	)
	As of March 31, 2013 and December 31, 2012, the liabilities for the settlement of the stock appreciation units were $0.3 million and $0.4 million, respectively and were included in accrued and other current liabilities on the condensed consolidated balance sheet.
	Based on the fair value of the stock appreciation units as of March 31, 2013, the Company had $0.05 million of unrecognized stock-based compensation expense that would be recognized over the remaining weighted-average period of 1.10 years. The Company estimated the fair value of all employee stock appreciation units using a Black-Scholes valuation model with the following assumptions:
			Three months ended
			March 31,
	Stock appreciation units		2013		2012
	Weighted-average expected term (years)		2.61		3.39
	Weighted-average volatility		63%		69%
	Risk-free interest rate		0.20 - 0.46%		0.42 - 1.04%
	Expected dividends		0%		0%
	Expected term. Vested stock appreciation units first become exercisable upon the expiration of the lock-up period associated with the initial public offering. Therefore, the Company estimated the term of the award based on an average of the weighted-average exercise period and the remaining contractual term.
	Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
	Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
	Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
	Employee stock purchase plan (“ESPP”)
	The following tables summarize the components of ESPP expense for the three months ended March 31, 2013 and 2012, respectively (in thousands):
			Three months ended
			March  31,
			2013			2012
	Cost of goods sold		$	80		$	67
	Research and development			120			176
	Sales and marketing			38			40
	General and administrative			40			37
			$	278		$	320
	As of March 31, 2013 there was $0.4 million of unrecognized stock-based compensation expense for stock purchase rights that will be recognized over the remaining offering period, through November 2013.
	The value of the stock purchase right consists of: (1) the 15% discount on the purchase of the stock, (2) 85% of the call option and (3) 15% of the put option. The call option and put option were valued using the Black-Scholes option pricing model with the following assumptions:
			Three months ended
			March 31,
	Stock purchase rights		2013		2012
	Weighted-average expected term (years)		0.74		0.72
	Weighted-average volatility		48%		71%
	Risk-free interest rate		0.13 - 0.16%		0.04 - 0.11%
	Expected dividends		0%		0%
	Expected term. The expected term represents the period of time from the beginning of the offering period to the purchase date.
	Volatility. Due to the limited history of the trading of the Company’s common stock since the initial public offering in February 2011, the expected volatility used by the Company is based on the actual volatility of similar entities. In evaluating similarity, factors such as industry, stage of life cycle, size, and financial leverage are taken into consideration. The term over which volatility was measured was commensurate with the expected term.
	Risk-free interest rate. The risk-free rate that the Company uses in the Black-Scholes option valuation model is based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term.
	Expected dividends. The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.

Restatement_and_Revision_of_Un1

Restatement and Revision of Unaudited Condensed Consolidated Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2013
Restatement and Revision of Unaudited Condensed Consolidated Financial Statements	'
	The effects of the restatement and revisions on the condensed consolidated balance sheet as of March 31, 2013 are summarized in the following table:
		31-Mar-13
		(In thousands, except per share data)
		Previously			Corrections						Revision for			Restated
		Reported						Penalty			Measurement			and
								Payment			Period			Revised
								Derivative			Adjustments
	ASSETS
	Current assets:
	Cash and cash equivalents	$	51,404		$	—		$	—		$	—		$	51,404
	Short-term investments		48,356			—			—			—			48,356
	Restricted cash		2,108			—			—			—			2,108
	Accounts receivable, net of allowance for doubtful accounts		63,267			—			—			—			63,267
	Inventories		68,818			(212	)		—			(6,747	)		61,859
	Prepaid expenses and other current assets		8,053			74			—			2,353			10,480
	Total current assets		242,006			(138	)		—			(4,394	)		237,474
	Long-term investments		331			—			—			—			331
	Property, plant and equipment, net		65,079			2,156			—			2,766			70,001
	Goodwill		2,188			(2,188	)		—			—			—
	Other intangible assets, net		17,176			(72	)		—			1,662			18,766
	Other long-term assets		4,206			(2,064	)		—			(781	)		1,361
	Total assets	$	330,986		$	(2,306	)	$	—		$	(747	)	$	327,933
	LIABILITIES, REDEEMABLE COMMON STOCK AND STOCKHOLDERS’ EQUITY
	Current liabilities:
	Accounts payable	$	40,963		$	(146	)	$	—		$	—		$	40,817
	Notes payable		10,431			—			—			—			10,431
	Current portion of long-term debt		10,710			(1,750	)		—			—			8,960
	Accrued and other current liabilities		23,520			1,225			—			129			24,874
	Total current liabilities		85,624			(671	)		—			129			85,082
	Long-term debt, net of current portion		40,420			1,750			—			—			42,170
	Deferred income tax liabilities		655			—			—			—			655
	Other noncurrent liabilities		10,506			(2,400	)		138			(97	)		8,147
	Total liabilities		137,205			(1,321	)		138			32			136,054
	Redeemable common stock		5,000			—			(5,000	)		—			—
	Stockholders’ equity:
	Preferred stock, $0.0025 par value
	Common stock, $0.0025 par value		76			—			—			—			76
	Additional paid-in capital		435,282			—			4,862			—			440,144
	Accumulated other comprehensive income		11,970			12			—			—			11,982
	Accumulated deficit		(258,547	)		(997	)		—			(779	)		(260,323	)
	Total stockholders’ equity		188,781			(985	)		4,862			(779	)		191,879
	Total liabilities, redeemable common stock and stockholders’ equity	$	330,986		$	(2,306	)	$	—		$	(747	)	$	327,933
	The effects of the restatement and revision on the condensed consolidated statement of operations for the three months ended March 31, 2013 are summarized in the following table:
		Three Months Ended March 31, 2013
		(In thousands, except share and per share  information)
		Previously			Corrections				Revision for		Restated
		Reported							Measurement		and
									Period		Revised
									Adjustments
	Revenue	$	56,063		$	—		$	—		$	56,063
	Cost of goods sold		44,333			(27	)		—			44,306
	Gross profit		11,730			27			—			11,757
	Operating expenses:
	Research and development		9,707			—			—			9,707
	Sales and marketing		3,586			—			—			3,586
	General and administrative		8,545			1,024			—			9,569
	Amortization of purchased intangible assets		321			—			—			321
	Restructuring charges		325			—			—			325
	Total operating expenses		22,484			1,024			—			23,508
	Loss from operations		(10,754	)		(997	)		—			(11,751	)
	Interest income		131			—			—			131
	Interest expense		(163	)		—			—			(163	)
	Other expense, net		(274	)		—			—			(274	)
Total interest and other expense, net		(306	)		—			—			(306	)
Loss before income taxes		(11,060	)		(997	)		—			(12,057	)
Income tax (expense) benefit		596			—			(779	)		(183	)
Net loss	$	(10,464	)	$	(997	)	$	(779	)	$	(12,240	)
Basic and diluted net loss per share:
Net loss	$	(0.34	)							$	(0.40	)
Weighted average shares used to compute basic and diluted net loss per share		30,574,032									30,574,032
The effects of the restatement and revision on the condensed consolidated statement of comprehensive loss for the three months ended March 31, 2013 are summarized in the following table:
	Three Months Ended March 31, 2013
	(In thousands)
	Previously			Corrections			Revision for			Restated
	Reported						Measurement			and
										Revised
							Period
							Adjustments
Net loss	$	(10,464	)	$	(997	)	$	(779	)	$	(12,240	)
Foreign currency translation adjustments		160			12			—			172
Unrealized loss on investments, net of tax of $0		(19	)		—			—			(19	)
Comprehensive loss	$	(10,323	)	$	(985	)	$	(779	)	$	(12,087	)
The effects of the restatement and revision on the condensed consolidated statement of cash flows for the three months ended March 31, 2013 are summarized in the following table:
	Three Months Ended March 31, 2013
	(In thousands)
	Previously			Corrections			Revision for			Restated
	Reported1						Measurement			and
							Period			Revised
							Adjustment
Cash flows from operating activities
Net loss	$	(10,464	)	$	(997	)	$	-779		$	(12,240	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization		4,590			(438	)		—			4,152
Asset impairment charges		34			—			—			34
Stock-based compensation expense		1,202			—			—			1,202
Deferred taxes		(781	)		—			781			—
Amortization of premiums and discounts on investments		—			—			—			—
Loss on disposal of property and equipment		111			—			—			111
Gain on sale of discontinued operations		—			—			—			—
Allowance for doubtful accounts		22			—			—			22
Write-down of inventories		30			—			—			30
Others		—			—			—			—
Change in assets and liabilities, net of effects of acquisitions:
Accounts receivable		7,155			—			—			7,155
Inventories		(4,682	)		—			—			(4,682	)
Prepaid expenses and other assets		(1,256	)		281			(2	)		(977	)
Accounts payable		4,014			(1,888	)		—			2,126
Acquisition-related transaction costs		3,190			758			—			3,948
Accrued and other liabilities		(1,462	)		1,742			—			280
Net cash provided by (used in) operating activities		1,703			(542	)		—			1,161
Cash flows from investing activities
Purchase of property, plant and equipment		(5,134	)		—			—			(5,134	)
Purchase of marketable securities		(29,030	)		—			—			(29,030	)
Proceeds from sale of marketable securities		23,747			—			—			23,747
Proceeds from maturity of securities		20,900			—			—			20,900
Decrease in restricted cash		524			—			—			524
Acquisition of OCU, net of notes payable		(14,629	)		542			—			(14,087	)
Net cash provided by (used in) investing activities		(3,622	)		542			—			(3,080	)
Cash flows from financing activities
Proceeds from exercise of stock options		79			—			—			79
Proceeds from bank loans		40,000			(13,557	)		—			26,443
Repayment of bank loans		(22,167	)		13,557			—			(8,610	)
Proceeds from issuance of notes payable		4,881			—			—			4,881
Repayment of notes payable		(6,482	)		—			—			(6,482	)
Net cash provided by (used in) financing activities		16,311			—			—			16,311
Effect of exchange rates on cash and cash equivalents		72			—			—			72
Net increase in cash and cash equivalents		14,464			—			—			14,464
Cash and cash equivalents at the beginning of the period		36,940			—			—			36,940
Cash and cash equivalents at the end of the period	$	51,404		$	—		$	—		$	51,404
1	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.
Effect of Reclassification on the Company's Balance Sheet	'
	As further described in Note 11, the Company may be required to pay a $5.0 million penalty if it does not achieve certain performance obligations agreed to in connection with the sale of its common stock in a private placement transaction on April 27, 2012.  The penalty payment was originally classified outside of equity as redeemable common stock at December 31, 2012 and March 31, 2013 since, while the Company intends to meet its performance obligations, it determined the ability to satisfy some of the obligations may be outside of the Company’s control.  The Company has since determined that the $5.0 million penalty payment is an embedded derivative instrument, with the underlying being the performance or nonperformance of meeting its performance obligations by the deadline, and has thus classified $4.9 million of the $5.0 million to additional paid-in capital and the remaining $0.1 million, representing the estimated fair value of the penalty payment derivative, to other noncurrent liabilities at March 31, 2013 and December 31, 2012. The effect on the Company’s balance sheet at December 31, 2012 for this matter was as follows:
			31-Dec-12
	(in thousands)		Previously			As Revised
			Reported
	Other noncurrent liabilities		$	1,724		$	1,862
	Redeemable common stock			5,000			—
	Additional paid-in capital			433,996			438,858

Discontinued_Operations_Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2013
Revenue and Components of Net Income Related to Discontinued Operations	'
	The results of operations associated with Broadband are presented as discontinued operations in the Company’s consolidated statements of operations for the three months ended March 31, 2013 and 2012. Revenue and the components of net income related to the discontinued operations for all periods were as follows (in thousands):
		Three months ended
		March 31,
		2013		2012
	Revenue	$	—	$	590
	Income from discontinued operations before income taxes		—		284
	Provision for income taxes		—		(114	)
	Net income from discontinued operations	$	—	$	170
	Basic and diluted net income per share on discontinued operations	$	—	$	0.01

Recovered_Sheet1

Cash Equivalents and Investments (Tables)	3 Months Ended
	Mar. 31, 2013
Summary of Unrealized Gains and Losses Related to Cash Equivalents and Investments in Marketable Securities	'
	Cash and cash equivalents
	The following table summarizes the Company’s unrealized gains and losses related to the cash equivalents and investments in marketable securities designated as available-for-sale (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Amortized		Gross		Gross			Fair		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value		Cost		Unrealized		Unrealized			Value
				Gains		Losses							Gains		Losses
	Cash and cash equivalents
	Money market funds	$	11	$	—	$	—		$	11	$	11	$	—	$	—		$	11
	Short-term investments
	Money market funds		4,858		—		—			4,858		7,259		—		—			7,259
	Corporate bonds		27,411		49		(6	)		27,454		23,151		43		(1	)		23,193
	U.S. federal agencies		14,138		5		—			14,143		27,241		10		—			27,251
	Foreign bonds and notes		—		—		—			—		4,682		14		—			4,696
	Municipal obligations		1,901		—		—			1,901		1,902		—		—			1,902
	Total investments in short-term investments		48,308		54		(6	)		48,356		64,235		67		(1	)		64,301
	Total investments	$	48,319	$	54	$	(6	)	$	48,367	$	64,246	$	67	$	(1	)	$	64,312
Short Term Investments	'
	As of March 31, 2013 and December 31, 2012, maturities of short-term investments are as follows (in thousands):
		March 31,		December 31,
		2013		2012
	Less than 1 year	$	39,647	$	51,861
	Due in 1 to 2 years		4,811		10,550
	Due in 2 to 5 years		2,008		—
	Due after 5 years		1,901		1,901
	Total	$	48,367	$	64,312
Fair Value of Financial Assets	'
	The following table sets forth the fair value of the Company’s financial assets as of the dates presented (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Level 1		Level 2		Level 3			Total		Level 1		Level 2		Level 3			Total
	Money market funds	$	4,869	$	—	$	—		$	4,869	$	7,270	$	—	$	—		$	7,270
	Marketable securities
	Corporate bonds		—		27,454		—			27,454		—		23,193		—			23,193
	U.S. federal agencies		—		14,143		—			14,143		—		27,251		—			27,251
	Foreign bonds and notes		—		—		—			—		—		4,696		—			4,696
	Municipal obligations		—		1,901		—			1,901		—		1,902		—			1,902
		$	4,869	$	43,498	$	—		$	48,367	$	7,270	$	57,042	$	—		$	64,312
Fair Value of Financial Liabilities	'
	The following table sets forth the fair value of the Company’s financial liabilities as of the dates presented (in thousands):
		As of March 31, 2013									As of December 31, 2012
		Level 1		Level 2		Level 3			Total		Level 1		Level 2		Level 3			Total
	Contingent consideration (Note 10)	$	—	$	—	$	959		$	959	$	—	$	—	$	959		$	959
	Penalty payment derivative (Note 11)	$	—	$	—	$	138		$	138	$	—	$	—	$	138		$	138

Recovered_Sheet2

Net Income (Loss) Per Share Attributable to NeoPhotonics Corporation Common Stockholders (Tables)	3 Months Ended
	Mar. 31, 2013
Computation of Basic and Diluted Income (Loss) Per Share Attributable to Common Stockholders	'
	The following table sets forth the computation of the basic and diluted net loss per share for the periods indicated (in thousands, except share and per share amounts):
		Three months ended
		March 31,
		2013			2012
	Numerator:
	Loss from continuing operations	$	(12,240	)	$	(11,778	)
	Income from discontinued operations, net of tax		—			170
	Net loss	$	(12,240	)	$	(11,608	)
	Denominator:
	Weighted average shares used to compute basic and diluted net income (loss) per share		30,574,032			24,870,684
	Basic and diluted net income (loss) per share:
	Continuing operations	$	(0.40	)	$	(0.47	)
	Discontinued operations	$	—		$	0.01
	Net loss	$	(0.40	)	$	(0.46	)
Potentially Dilutive Securities Excluded From Computation of Diluted Net Income (Loss) Per Share Attributable to Common Stockholders	'
	The following potentially dilutive securities were excluded from the computation of diluted net loss per share attributable to NeoPhotonics Corporation common stockholders, as their effect would have been antidilutive:
		March 31,
		2013			2012
	Employee stock options		2,758,964			2,613,907
	Restricted stock units		848,867			662,944
	Employee stock purchase plan		483,969			552,069
	Common stock warrants		4,482			4,482
			4,096,282			3,833,402

Business_Combination_Tables

Business Combination (Tables)	3 Months Ended
	Mar. 31, 2013
Summary of Purchase Accounting and Tangible and Intangible Assets Acquired	'
	The following table summarizes the acquisition accounting and the tangible and intangible assets acquired (in thousands):
	Total purchase consideration:
	Cash paid upon closing		$	14,087
	Net receivable from Lapis			(959	)
	Notes payable			11,130
			$	24,258
	Liabilities assumed:
	Pension and retirement obligations		$	6,471
	Other compensation-related liabilities			1,083
	Other current liabilities			1,265
			$	8,819
	Fair value of assets acquired:
	Inventory		$	13,309
	Other current assets			35
	Land, property, plant and equipment(1)			14,433
	Intangible assets acquired:
	Developed technology			2,120
	Customer relationships			3,180
			$	33,077
	-1	Includes land of $3.5 million, buildings of $3.9 million and machinery, equipment, furniture and fixtures of $7.0 million.
Pro forma Information for Business Acquisition	'
	The unaudited financial information in the table below summarizes the combined results of operations of the Company with the results of OCU prior to the acquisition, on a pro forma basis, as though the companies had been combined as of the beginning of the period presented. The pro forma financial information for the quarter ended March 31, 2013 includes elimination of $4.5 million of transaction costs and $1.9 million of revenue and $1.8 million of costs related to sales from OCU to the Company.  The pro forma financial information for the quarter ended March 31, 2012 includes elimination of $0.4 million of revenue and $0.3 million of costs related to sales from OCU to the Company and a $2.5 million increase in cost of goods sold due to a change in the value of inventory as a result of acquisition accounting.  The pro forma financial information is presented for informational purposes only and is not indicative of the results of operations that would have been achieved had the acquisition taken place at the beginning of the period presented, nor does it intend to be a projection of future results.
			For the three months ended
			March 31,
			2013			2012
	Revenue		$	68,754		$	67,537
	Net loss		$	(5,277	)	$	(12,038	)
	Basic and diluted net loss per share		$	(0.17	)	$	(0.48	)

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	3 Months Ended
	Mar. 31, 2013
Accounts Receivable, Net	'
	Accounts receivable, net consists of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Accounts receivable		$	58,878		$	66,338
	Trade notes receivable			5,375			4,979
	Allowance for doubtful accounts			(986	)		(963	)
			$	63,267		$	70,354
Inventories	'
	Inventories consist of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Raw materials		$	26,332		$	20,520
	Work in process			20,560			8,603
	Finished goods (1)			14,967			14,670
			$	61,859		$	43,793
	-1	Finished goods inventory at offsite managed inventory locations was $4.8 million and $4.5 million as of March 31, 2013 and December 31, 2012, respectively.
Purchased Intangible Assets	'
	Purchased intangible assets consist of the following (in thousands):
			March 31, 2013								December 31, 2012
			Gross			Accumulated			Net		Gross		Accumulated			Net
			Assets			Amortization			Assets		Assets		Amortization			Assets
	Technology and patents		$	34,295		$	(23,405	)	$	10,890	$	32,176	$	(22,869	)	$	9,307
	Customer relationships			15,128			(8,392	)		6,736		11,898		(8,148	)		3,750
	Leasehold interest			1,358			(234	)		1,124		1,355		(241	)		1,114
	Noncompete agreements			950			(934	)		16		950		(908	)		42
			$	51,731		$	(32,965	)	$	18,766	$	46,379	$	(32,166	)	$	14,213
Amortization Expense of Purchased Intangible Assets	'
	Amortization expense relating to technology and patents and the leasehold interest intangible assets is included within cost of goods sold, and customer relationships and the noncompete agreements within operating expenses. The following table presents details of the amortization expense of the Company’s purchased intangible assets as reported in the condensed consolidated statements of operations (in thousands):
			Three months ended
			March 31,
			2013			2012
	Cost of goods sold		$	428		$	598
	Operating expenses			321			354
	Total		$	749		$	952
Estimated Future Amortization Expense of Purchased Intangible Assets	'
	The estimated future amortization expense of purchased intangible assets as of March 31, 2013, is as follows (in thousands):
	2013 (remaining 9 months)		$	3,617
	2014			4,505
	2015			4,490
	2016			3,743
	2017			814
	Thereafter			1,597
			$	18,766
Accrued Expenses and Other Current Liabilities	'
	Accrued and other current liabilities consist of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Employee-related		$	9,731		$	12,293
	Other			15,143			7,666
			$	24,874		$	19,959
Summary of Movement in Warranty Accrual	'
	The table below summarizes the movement in the warranty accrual (in thousands):
			Three months ended
			March 31,
			2013			2012
	Beginning balance		$	1,072		$	1,443
	Warranty accruals			26			19
	Settlements and adjustments			86			(247	)
	Ending balance		$	1,184		$	1,215
Other Noncurrent Liabilities	'
	Other noncurrent liabilities consist of the following (in thousands):
			March 31,			December 31,
			2013			2012
	Employee-related		$	6,712		$	188
	Penalty payment derivative (Note 11)			138			138
	Other			1,297			1,536
			$	8,147		$	1,862

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2013
Components of Debt, Obligations, Weighted Average Interest Rate and Additional Fair Value Information Relating to Outstanding Debt Instruments	'
	The Company records debt at its carrying amount. The Company uses a market approach to determine fair value, which results in a Level 2 fair value measurement. The following table provides the components of debt, obligations, weighted average interest rate and additional fair value information relating to the Company’s outstanding debt instruments (in thousands, except percentages):
		March 31, 2013							December 31, 2012
		Carrying		Fair		Weighted			Carrying		Fair		Weighted
		Amount		Value		Average			Amount		Value		Average
						Interest							Interest
						Rate							Rate
	Notes payable	$	10,431	$	10,431				$	12,003	$	12,003
	Notes payable related to OCU acquisition		3,710		3,710		1.5	%		-		-
	Short-term debt		5,250		5,250		5	%		5,000		4,892		2.2	%
	Total short-term debt	$	8,960	$	8,960				$	5,000	$	4,892
	Long-term notes payable related to OCU acquisition		7,420		7,420		1.5	%		-		-
	Long-term debt		34,750		34,750		4.91	%		17,167		16,336		2.2	%
	Total long-term debt	$	42,170	$	42,170				$	17,167	$	16,336

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2013
Future Minimum Commitments Under All Operating Leases	'
	The Company leases various facilities under noncancelable operating leases. As of March 31, 2013, the future minimum commitments under all operating leases are as follows (in thousands):
	2013 (remaining 9 months)	$	1,593
	2014		1,385
	2015		1,188
	2016		666
	2017		500
	Thereafter		968
		$	6,300

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2013
Reserved Shares of Authorized but Unissued Common Stock	'
	As of March 31, 2013, the Company had reserved the following shares of authorized but unissued common stock:
		Common Stock
	Stock option plans		5,088,612
	Stock purchase plan		257,734
	Warrants		4,482
			5,350,828
Summary of Stock Option and Restricted Stock Unit Activity	'
	The following table summarizes the Company’s stock option activity during the three months ended March 31, 2013:
					Stock Options					Restricted Stock Units
		Shares			Number			Weighted		Number			Weighted
		available for			of			average		of			average
		grant			shares			exercise		units			grant
								price					date fair
													value
	Balance at December 31, 2012		382,668			2,773,887		$	5.87		924,823		$	5.84
	Authorized for issuance		1,069,115			-			0		-			0
	Granted		(30,000	)		17,800			5.6		12,200			5.74
	Exercised/Converted		-			(18,251	)		4.32		(51,634	)		6.12
	Forfeited		58,998			(14,472	)		8.43		(36,522	)		5.84
	Balance at March 31, 2013		1,480,781			2,758,964		$	5.86		848,867		$	5.82
Summary of Information about Stock Options Outstanding	'
	The following table summarizes information about stock options outstanding as of March 31, 2013:
		Options Outstanding
		Number			Weighted			Weighted		Aggregate
		of			average			average		intrinsic value
		shares			exercise price			remaining		(in thousands)
								contractual
								term
								(years)
	Vested and expected to vest		2,700,303		$	5.87			6.39	$	1,228
	Exercisable		1,902,220		$	5.67			5.5	$	1,143
Summary of Information about Restricted Stock Units Outstanding	'
	The following table summarizes information about restricted stock units outstanding as of March 31, 2013:
		Restricted Stock Units Outstanding
		Number			Weighted			Weighted		Aggregate
		of			average			average		intrinsic value
		shares			grant date			remaining		(in thousands)
					fair value			contractual
								term
								(years)
	Vested and expected to vest		782,071		$	5.82			1.15	$	3,996
Summary of Stock Appreciation Unit Activity	'
	The following table summarizes the Company’s stock appreciation unit activity during the three months ended March 31, 2013:
		Stock			Weighted
		Appreciation			average
		Units			exercise
					price
	Stock appreciation units outstanding as of December 31, 2012		212,534		$	7.07
	Stock appreciation units cancelled		(4,423	)		8.93
	Stock appreciation units exercised		(316	)		4.25
	Stock appreciation units outstanding as of March 31, 2013		207,795		$	7.04
Summary of Information about Stock Appreciation Units Outstanding	'
	The following table summarizes information about stock appreciation units outstanding as of March 31, 2013:
		Stock Appreciation Units Outstanding
		Number			Weighted			Weighted		Aggregate
		of			average			average		intrinsic value
		units			exercise price			remaining		(in thousands)
								contractual
								term
								(years)
	Vested and expected to vest		207,396		$	7.03			5.86	$	101
	Exercisable		181,913		$	6.71			5.69	$	98

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2013
Stock Based Compensation Expense	'
Stock-Based Compensation Expense Recorded	'
	The Company’s stock-based compensation expense was recorded as follows (in thousands):
		Three months ended
		March 31,
	(in thousands)	2013			2012
	Cost of goods sold	$	243		$	188
	Research and development		418			469
	Sales and marketing		238			209
	General and administrative		303			278
		$	1,202		$	1,144
Stock Option	'
Stock-Based Compensation Expense Recorded	'
	The following tables summarize the components of stock-based compensation expense for stock options for the three months ended March 31, 2013 and 2012, respectively (in thousands):
		Three months ended
		March 31,
		2013			2012
	Cost of goods sold	$	79		$	61
	Research and development		174			209
	Sales and marketing		78			94
	General and administrative		173			174
		$	504		$	538
Estimated Fair Value of All Employee Stock Options Using Black-Scholes Valuation Model	'
	The Company estimated the fair value of all employee stock options using a Black-Scholes valuation model with the following assumptions:
		Three months ended
		March 31,
	Stock Options	2013			2012
	Weighted-average expected term (years)		6.55			6.71
	Weighted-average volatility		76	%		71	%
	Risk-free interest rate		1.08	%		1.81	%
	Expected dividends		0	%		0	%
Stock Appreciation Rights (SARs)	'
Stock-Based Compensation Expense Recorded	'
	Stock appreciation units are remeasured each period at fair value. The following table summarizes the expense (credit) recognized for stock appreciation units for the three months ended March 31, 2013 (in thousands):
		Three months ended
		March 31,
		2013			2012
	Cost of goods sold	$	(24	)	$	(5	)
	Research and development		(32	)		(9	)
	Sales and marketing		(13	)		(4	)
	General and administrative		(9	)		(3	)
		$	(78	)	$	(21	)
Estimated Fair Value of All Employee Stock Options Using Black-Scholes Valuation Model	'
	Based on the fair value of the stock appreciation units as of March 31, 2013, the Company had $0.05 million of unrecognized stock-based compensation expense that would be recognized over the remaining weighted-average period of 1.10 years. The Company estimated the fair value of all employee stock appreciation units using a Black-Scholes valuation model with the following assumptions:
		Three months ended
		March 31,
	Stock appreciation units	2013		2012
	Weighted-average expected term (years)	2.61		3.39
	Weighted-average volatility	63%		69%
	Risk-free interest rate	0.20 - 0.46%		0.42 - 1.04%
	Expected dividends	0%		0%
Employee Stock Purchase Plan	'
Stock-Based Compensation Expense Recorded	'
	The following tables summarize the components of ESPP expense for the three months ended March 31, 2013 and 2012, respectively (in thousands):
		Three months ended
		March  31,
		2013			2012
	Cost of goods sold	$	80		$	67
	Research and development		120			176
	Sales and marketing		38			40
	General and administrative		40			37
		$	278		$	320
Estimated Fair Value of All Employee Stock Options Using Black-Scholes Valuation Model	'
	The value of the stock purchase right consists of: (1) the 15% discount on the purchase of the stock, (2) 85% of the call option and (3) 15% of the put option. The call option and put option were valued using the Black-Scholes option pricing model with the following assumptions:
		Three months ended
		March 31,
	Stock purchase rights	2013		2012
	Weighted-average expected term (years)	0.74		0.72
	Weighted-average volatility	48%		71%
	Risk-free interest rate	0.13 - 0.16%		0.04 - 0.11%
	Expected dividends	0%		0%
Restricted Stock Units (RSUs)	'
Stock-Based Compensation Expense Recorded	'
	The following table summarizes the stock-based compensation expense recognized for restricted stock units for the three months ended March 31, 2013 (in thousands):
		Three months ended
		March  31,
		2013			2012
	Cost of goods sold	$	108		$	65
	Research and development		156			93
	Sales and marketing		135			79
	General and administrative		99			70
		$	498		$	307

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2013
Income Tax Benefit and Effective Tax Rate	'
	The Company’s income tax expense for the three months ended March 31, 2013 is primarily related to income taxes of the Company’s non-U.S. operations. The Company recorded an income tax provision of $183,000 and an income tax benefit of $60,000 for the three months ended March 31, 2013 and 2012, respectively.
	(in thousands, except percentages)	Three months ended
		March 31,
		2013			2012
	Income tax (expense) benefit	$	(183	)	$	60
	Effective tax rate		2	%		1	%

Restatement_and_Revisions_on_t

Restatement and Revisions on the Condensed Consolidated Balance Sheets (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$51,404	[1]	$36,940	[2]
Short-term investments	48,356	[1]	64,301	[2]
Restricted cash	2,108	[1]	2,626	[2]
Accounts receivable, net of allowance for doubtful accounts	63,267	[1]	70,354	[2]
Inventories	61,859	[1]	43,793	[2]
Prepaid expenses and other current assets	10,480	[1]	7,630	[2]
Total current assets	237,474	[1]	225,644	[2]
Long-term investments	331	[1]	188	[2]
Property, plant and equipment, net	70,001	[1]	54,440	[2]
Other intangible assets, net	18,766	[1]	14,213	[2]
Other long-term assets	1,361	[1]	1,147	[2]
Total assets	327,933	[1]	295,632	[2]
Current liabilities:	'		'
Accounts payable	40,817	[1]	36,308	[2]
Notes payable	10,431	[1]	12,003	[2]
Current portion of long-term debt	8,960	[1]	5,000	[2]
Accrued and other current liabilities	24,874	[1]	19,959	[2]
Total current liabilities	85,082	[1]	73,270	[2]
Long-term debt, net of current portion	42,170	[1]	17,167	[2]
Deferred income tax liabilities	655	[1]	653	[2]
Other noncurrent liabilities	8,147	[1]	1,862	[2]
Total liabilities	136,054	[1]	92,952	[2]
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'	[1]	'	[2]
Common stock, $0.0025 par value At March 31, 2013: 100,000,000 shares authorized, 30,604,293 shares issued and outstanding; At December 31, 2012: 100,000,000 shares authorized, 30,546,155 shares issued and outstanding	76	[1]	76	[2]
Additional paid-in capital	440,144	[1]	438,858	[2]
Accumulated other comprehensive income	11,982	[1]	11,829	[2]
Accumulated deficit	-260,323	[1]	-248,083	[2]
Total stockholders’ equity	191,879	[1]	202,680	[2]
Total liabilities, redeemable common stock and stockholders’ equity	327,933	[1]	295,632	[2]
Previously Reported	'		'
Current assets:	'		'
Cash and cash equivalents	51,404		'
Short-term investments	48,356		'
Restricted cash	2,108		'
Accounts receivable, net of allowance for doubtful accounts	63,267		'
Inventories	68,818		'
Prepaid expenses and other current assets	8,053		'
Total current assets	242,006		'
Long-term investments	331		'
Property, plant and equipment, net	65,079		'
Goodwill	2,188		'
Other intangible assets, net	17,176		'
Other long-term assets	4,206		'
Total assets	330,986		'
Current liabilities:	'		'
Accounts payable	40,963		'
Notes payable	10,431		'
Current portion of long-term debt	10,710		'
Accrued and other current liabilities	23,520		'
Total current liabilities	85,624		'
Long-term debt, net of current portion	40,420		'
Deferred income tax liabilities	655		'
Other noncurrent liabilities	10,506		1,724
Total liabilities	137,205		'
Redeemable common stock	5,000		5,000
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'		'
Common stock, $0.0025 par value At March 31, 2013: 100,000,000 shares authorized, 30,604,293 shares issued and outstanding; At December 31, 2012: 100,000,000 shares authorized, 30,546,155 shares issued and outstanding	76		'
Additional paid-in capital	435,282		433,996
Accumulated other comprehensive income	11,970		'
Accumulated deficit	-258,547		'
Total stockholders’ equity	188,781		'
Total liabilities, redeemable common stock and stockholders’ equity	330,986		'
Corrections	'		'
Current assets:	'		'
Inventories	-212		'
Prepaid expenses and other current assets	74		'
Total current assets	-138		'
Property, plant and equipment, net	2,156		'
Goodwill	-2,188		'
Other intangible assets, net	-72		'
Other long-term assets	-2,064		'
Total assets	-2,306		'
Current liabilities:	'		'
Accounts payable	-146		'
Current portion of long-term debt	-1,750		'
Accrued and other current liabilities	1,225		'
Total current liabilities	-671		'
Long-term debt, net of current portion	1,750		'
Other noncurrent liabilities	-2,400		'
Total liabilities	-1,321		'
Redeemable common stock	0		'
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'		'
Accumulated other comprehensive income	12		'
Accumulated deficit	-997		'
Total stockholders’ equity	-985		'
Total liabilities, redeemable common stock and stockholders’ equity	-2,306		'
Penalty Payment Derivative	'		'
Current liabilities:	'		'
Other noncurrent liabilities	138		138
Total liabilities	138		'
Redeemable common stock	-5,000		'
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'		'
Additional paid-in capital	4,862		4,862
Total stockholders’ equity	4,862		'
Revision for Measurement Period Adjustments	'		'
Current assets:	'		'
Inventories	-6,747		'
Prepaid expenses and other current assets	2,353		'
Total current assets	-4,394		'
Property, plant and equipment, net	2,766		'
Other intangible assets, net	1,662		'
Other long-term assets	-781		'
Total assets	-747		'
Current liabilities:	'		'
Accrued and other current liabilities	129		'
Total current liabilities	129		'
Other noncurrent liabilities	-97		'
Total liabilities	32		'
Redeemable common stock	0		'
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'		'
Accumulated deficit	-779		'
Total stockholders’ equity	-779		'
Total liabilities, redeemable common stock and stockholders’ equity	-747		'
Restated and Revised	'		'
Current assets:	'		'
Cash and cash equivalents	51,404		'
Short-term investments	48,356		'
Restricted cash	2,108		'
Accounts receivable, net of allowance for doubtful accounts	63,267		'
Inventories	61,859		'
Prepaid expenses and other current assets	10,480		'
Total current assets	237,474		'
Long-term investments	331		'
Property, plant and equipment, net	70,001		'
Other intangible assets, net	18,766		'
Other long-term assets	1,361		'
Total assets	327,933		'
Current liabilities:	'		'
Accounts payable	40,817		'
Notes payable	10,431		'
Current portion of long-term debt	8,960		'
Accrued and other current liabilities	24,874		'
Total current liabilities	85,082		'
Long-term debt, net of current portion	42,170		'
Deferred income tax liabilities	655		'
Other noncurrent liabilities	8,147		'
Total liabilities	136,054		'
Redeemable common stock	0		'
Preferred stock, $0.0025 par value At March 31,2013 and At December 31, 2012: 10,000,000 shares authorized, no shares issued or outstanding:	'		'
Common stock, $0.0025 par value At March 31, 2013: 100,000,000 shares authorized, 30,604,293 shares issued and outstanding; At December 31, 2012: 100,000,000 shares authorized, 30,546,155 shares issued and outstanding	76		'
Additional paid-in capital	440,144		'
Accumulated other comprehensive income	11,982		'
Accumulated deficit	-260,323		'
Total stockholders’ equity	191,879		'
Total liabilities, redeemable common stock and stockholders’ equity	$327,933		'
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Restatement_and_Revisions_on_t1

Restatement and Revisions on the Condensed Consolidated Balance Sheets (Parenthetical) (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Preferred stock, par value	$0.00	[1]	$0.00	[2]
Common stock, par value	$0.00	[1]	$0.00	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Restatement_and_Revisions_on_t2

Restatement and Revisions on the Condensed Consolidated Statements of Operations (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Revenue	$56,063	[1]	$54,223
Cost of goods sold	44,306	[1]	42,817
Gross profit	11,757	[1]	11,406
Operating expenses:	'		'
Research and development	9,707	[1]	10,538
Sales and marketing	3,586	[1]	3,023
General and administrative	5,059	[1]	6,601
Amortization of purchased intangible assets	321	[1]	354
Restructuring charges	325	[1]	130
Total operating expenses	23,508	[1]	22,947
Loss from operations	-11,751	[1]	-11,541
Interest income	131	[1]	132
Interest expense	-163	[1]	-154
Other expense, net	-274	[1]	-275
Total interest and other expense, net	-306	[1]	-297
Loss before income taxes	-12,057	[1]	-11,838
Income tax (expense) benefit	-183	[1]	60
Net loss	-12,240	[1],[2],[3]	-11,608
Basic and diluted net income (loss) per share:	'		'
Net loss	($0.40)	[1]	($0.46)
Weighted average shares used to compute basic and diluted net loss per share	30,574,032	[1]	24,870,684
Previously Reported	'		'
Revenue	56,063		'
Cost of goods sold	44,333		'
Gross profit	11,730		'
Operating expenses:	'		'
Research and development	9,707		'
Sales and marketing	3,586		'
General and administrative	8,545		'
Amortization of purchased intangible assets	321		'
Restructuring charges	325		'
Total operating expenses	22,484		'
Loss from operations	-10,754		'
Interest income	131		'
Interest expense	-163		'
Other expense, net	-274		'
Total interest and other expense, net	-306		'
Loss before income taxes	-11,060		'
Income tax (expense) benefit	596		'
Net loss	-10,464	[4]	'
Basic and diluted net income (loss) per share:	'		'
Net loss	($0.34)		'
Weighted average shares used to compute basic and diluted net loss per share	30,574,032		'
Corrections	'		'
Cost of goods sold	-27		'
Gross profit	27		'
Operating expenses:	'		'
General and administrative	1,024		'
Total operating expenses	1,024		'
Loss from operations	-997		'
Loss before income taxes	-997		'
Net loss	-997		'
Revision for Measurement Period Adjustments	'		'
Operating expenses:	'		'
Income tax (expense) benefit	-779		'
Net loss	-779		'
Restated and Revised	'		'
Revenue	56,063		'
Cost of goods sold	44,306		'
Gross profit	11,757		'
Operating expenses:	'		'
Research and development	9,707		'
Sales and marketing	3,586		'
General and administrative	9,569		'
Amortization of purchased intangible assets	321		'
Restructuring charges	325		'
Total operating expenses	23,508		'
Loss from operations	-11,751		'
Interest income	131		'
Interest expense	-163		'
Other expense, net	-274		'
Total interest and other expense, net	-306		'
Loss before income taxes	-12,057		'
Income tax (expense) benefit	-183		'
Net loss	($12,240)		'
Basic and diluted net income (loss) per share:	'		'
Net loss	($0.40)		'
Weighted average shares used to compute basic and diluted net loss per share	30,574,032		'
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2
[4]	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.

Restatement_and_Revisions_on_t3

Restatement and Revisions on the Condensed Consolidated Statement of Comprehensive Loss (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Net loss	($12,240)	[1],[2],[3]	($11,608)
Foreign currency translation adjustments	172	[2]	125
Unrealized loss on investments, net of tax of $0	-19	[2]	296
Comprehensive loss	-12,087	[2]	-11,187
Previously Reported	'		'
Net loss	-10,464	[4]	'
Foreign currency translation adjustments	160		'
Unrealized loss on investments, net of tax of $0	-19		'
Comprehensive loss	-10,323		'
Corrections	'		'
Net loss	-997		'
Foreign currency translation adjustments	12		'
Unrealized loss on investments, net of tax of $0	'		'
Comprehensive loss	-985		'
Revision for Measurement Period Adjustments	'		'
Net loss	-779		'
Comprehensive loss	-779		'
Restated and Revised	'		'
Net loss	-12,240		'
Foreign currency translation adjustments	172		'
Unrealized loss on investments, net of tax of $0	-19		'
Comprehensive loss	($12,087)		'
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2
[4]	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.

Restatement_and_Revisions_on_t4

Restatement and Revisions on the Condensed Consolidated Statement of Comprehensive Loss (Parenthetical) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Unrealized loss on investments, tax	$0	[1]	$0
[1]	Restated and Revised, see Note 2

Restatement_and_Revisions_Cons

Restatement and Revisions Consolidated Statements of Cash Flows (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Cash Flows From Operating Activities	'		'
Net loss	($12,240)	[1],[2],[3]	($11,608)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation and amortization	4,152	[3]	5,353
Asset impairment charges	34	[3]	14
Stock-based compensation expense	1,202	[3]	1,144
Deferred taxes	'		387
Loss on disposal of property and equipment	111	[3]	18
Gain on sale of discontinued operations	'		-750
Allowance for doubtful accounts	22	[3]	8
Write-down of inventories	30	[3]	721
Change in assets and liabilities, net of effects of acquisitions:	'		'
Accounts receivable	7,155	[3]	9,155
Inventories	-4,682	[3]	-4,680
Prepaid expenses and other assets	-977	[3]	-1,800
Accounts payable	2,126	[3]	584
Acquisition-related transaction costs	3,948	[3]	'
Accrued and other liabilities	280	[3]	-184
Net cash provided by (used in) operating activities	1,161	[3]	-1,638
Cash Flows From Investing Activities	'		'
Purchase of property, plant and equipment	-5,134	[3]	-2,019
Purchase of marketable securities	-29,030	[3]	-12,964
Proceeds from sale of marketable securities	23,747	[3]	5,139
Proceeds from maturity of securities	20,900	[3]	15,100
Decrease in restricted cash	524	[3]	68
Acquisition of OCU, net of notes payable	-14,087	[3]	'
Net cash provided by (used in) investing activities	-3,080	[3]	7,149
Cash flows from financing activities	'		'
Proceeds from bank loans	26,443	[3]	'
Repayment of bank loans	-8,610	[3]	-1,250
Proceeds from issuance of notes payable	4,881	[3]	7,738
Repayment of notes payable	-6,482	[3]	-7,867
Net cash provided by (used in) financing activities	16,311	[3]	-1,315
Effect of exchange rates on cash and cash equivalents	72	[3]	209
Net increase in cash and cash equivalents	14,464	[3]	4,405
Cash and cash equivalents at the beginning of the period	36,940	[3]	32,485
Cash and cash equivalents at the end of the period	51,404	[3]	36,890
Previously Reported	'		'
Cash Flows From Operating Activities	'		'
Net loss	-10,464	[4]	'
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation and amortization	4,590	[4]	'
Asset impairment charges	34	[4]	'
Stock-based compensation expense	1,202	[4]	'
Deferred taxes	-781	[4]	'
Amortization of premiums and discounts on investments	'	[4]	'
Loss on disposal of property and equipment	111	[4]	'
Gain on sale of discontinued operations	'	[4]	'
Allowance for doubtful accounts	22	[4]	'
Write-down of inventories	30	[4]	'
Others	'	[4]	'
Change in assets and liabilities, net of effects of acquisitions:	'		'
Accounts receivable	7,155	[4]	'
Inventories	-4,682	[4]	'
Prepaid expenses and other assets	-1,256	[4]	'
Accounts payable	4,014	[4]	'
Acquisition-related transaction costs	3,190	[4]	'
Accrued and other liabilities	-1,462	[4]	'
Net cash provided by (used in) operating activities	1,703	[4]	'
Cash Flows From Investing Activities	'		'
Purchase of property, plant and equipment	-5,134	[4]	'
Purchase of marketable securities	-29,030	[4]	'
Proceeds from sale of marketable securities	23,747	[4]	'
Proceeds from maturity of securities	20,900	[4]	'
Decrease in restricted cash	524	[4]	'
Acquisition of OCU, net of notes payable	-14,629	[4]	'
Net cash provided by (used in) investing activities	-3,622	[4]	'
Cash flows from financing activities	'		'
Proceeds from bank loans	40,000	[4]	'
Repayment of bank loans	-22,167	[4]	'
Proceeds from issuance of notes payable	4,881	[4]	'
Repayment of notes payable	-6,482	[4]	'
Net cash provided by (used in) financing activities	16,311	[4]	'
Effect of exchange rates on cash and cash equivalents	72	[4]	'
Net increase in cash and cash equivalents	14,464	[4]	'
Cash and cash equivalents at the beginning of the period	36,940	[4]	'
Cash and cash equivalents at the end of the period	51,404	[4]	'
Corrections	'		'
Cash Flows From Operating Activities	'		'
Net loss	-997		'
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation and amortization	-438		'
Amortization of premiums and discounts on investments	'		'
Gain on sale of discontinued operations	'		'
Others	'		'
Change in assets and liabilities, net of effects of acquisitions:	'		'
Prepaid expenses and other assets	281		'
Accounts payable	-1,888		'
Acquisition-related transaction costs	758		'
Accrued and other liabilities	1,742		'
Net cash provided by (used in) operating activities	-542		'
Cash Flows From Investing Activities	'		'
Acquisition of OCU, net of notes payable	542		'
Net cash provided by (used in) investing activities	542		'
Cash flows from financing activities	'		'
Proceeds from bank loans	-13,557		'
Repayment of bank loans	13,557		'
Revision for Measurement Period Adjustments	'		'
Cash Flows From Operating Activities	'		'
Net loss	-779		'
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Deferred taxes	781		'
Amortization of premiums and discounts on investments	'		'
Gain on sale of discontinued operations	'		'
Others	'		'
Change in assets and liabilities, net of effects of acquisitions:	'		'
Prepaid expenses and other assets	-2		'
Restated and Revised	'		'
Cash Flows From Operating Activities	'		'
Net loss	-12,240		'
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation and amortization	4,152		'
Asset impairment charges	34		'
Stock-based compensation expense	1,202		'
Amortization of premiums and discounts on investments	'		'
Loss on disposal of property and equipment	111		'
Gain on sale of discontinued operations	'		'
Allowance for doubtful accounts	22		'
Write-down of inventories	30		'
Others	'		'
Change in assets and liabilities, net of effects of acquisitions:	'		'
Accounts receivable	7,155		'
Inventories	-4,682		'
Prepaid expenses and other assets	-977		'
Accounts payable	2,126		'
Acquisition-related transaction costs	3,948		'
Accrued and other liabilities	280		'
Net cash provided by (used in) operating activities	1,161		'
Cash Flows From Investing Activities	'		'
Purchase of property, plant and equipment	-5,134		'
Purchase of marketable securities	-29,030		'
Proceeds from sale of marketable securities	23,747		'
Proceeds from maturity of securities	20,900		'
Decrease in restricted cash	524		'
Acquisition of OCU, net of notes payable	-14,087		'
Net cash provided by (used in) investing activities	-3,080		'
Cash flows from financing activities	'		'
Proceeds from bank loans	26,443		'
Repayment of bank loans	-8,610		'
Proceeds from issuance of notes payable	4,881		'
Repayment of notes payable	-6,482		'
Net cash provided by (used in) financing activities	16,311		'
Effect of exchange rates on cash and cash equivalents	72		'
Net increase in cash and cash equivalents	14,464		'
Cash and cash equivalents at the beginning of the period	36,940		'
Cash and cash equivalents at the end of the period	$51,404		'
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2
[4]	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.

Effect_of_Reclassification_on_

Effect of Reclassification on the Company's Balance Sheet (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Other noncurrent liabilities	$8,147	[1]	$1,862	[2]
Additional paid-in capital	440,144	[1]	438,858	[2]
Previously Reported	'		'
Other noncurrent liabilities	10,506		1,724
Redeemable common stock	5,000		5,000
Additional paid-in capital	$435,282		$433,996
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Restatement_and_Revision_of_Un2

Restatement and Revision of Unaudited Condensed Consolidated Financial Statements - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Apr. 27, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Embedded Derivative Financial Instruments

Private Placement

Private Placement

Classification Corrections

Corrections

Corrections

Corrections

Corrections

Penalty Payment Derivative

Penalty Payment Derivative

Embedded Derivative Financial Instruments

Embedded Derivative Financial Instruments

Over Statement

Under Statement

Optical Components Business Units

Registration tax amount expenses for acquisition

'

'

'

'

'

'

'

'

'

'

$500,000

'

'

Real Estate Tax Expense

'

'

'

'

'

'

'

'

'

'

800,000

'

'

Goodwill

'

'

'

'

'

'

'

-2,188,000

'

'

-2,188,000

'

'

Unrecorded liabilities related to purchase of property, plant and equipment

'

'

'

'

'

'

'

'

'

'

300,000

'

'

Unrecorded warranty obligations

'

'

'

'

'

'

'

'

'

'

100,000

'

'

Inventory adjustments

'

'

'

'

'

'

'

'

'

'

200,000

'

'

Long term assets related to pension obligation

'

'

'

'

'

'

'

2,100,000

'

'

'

'

'

Long-term debt, net of current portion

42,170,000

[1]

'

17,167,000

[2]

'

'

'

'

1,750,000

'

'

'

'

'

Cost of goods sold

44,306,000

[3]

42,817,000

'

'

'

'

100,000

-27,000

'

'

'

'

'

Accounts payable

2,126,000

[4]

584,000

'

'

'

'

-1,700,000

-1,888,000

'

'

'

'

'

Accrued and other liabilities

280,000

[4]

-184,000

'

'

'

'

1,700,000

1,742,000

'

'

'

'

'

Repayment of bank loans

-8,610,000

[4]

-1,250,000

'

'

'

'

'

13,557,000

'

'

'

'

'

Proceeds from bank loans

-26,443,000

[4]

'

'

'

'

'

'

13,557,000

'

'

'

'

'

Costs Incurred, asset retirement obligation Incurred

'

'

'

'

'

'

'

'

300,000

200,000

'

'

'

Amount payable to vendor for cost of goods sold

40,817,000

[1]

'

36,308,000

[2]

'

'

'

'

-146,000

'

'

'

'

'

Payable amount on performance of common stock issued in private placement

'

'

'

'

5,000,000

5,000,000

'

'

'

'

'

'

'

Additional paid-in capital

440,144,000

[1]

'

438,858,000

[2]

4,862,000

'

'

'

'

'

'

'

4,862,000

4,862,000

Other noncurrent liabilities

$8,147,000

[1]

'

$1,862,000

[2]

'

'

'

'

($2,400,000)

'

'

'

$138,000

$138,000

[1]

Restated and Revised, see Notes 2 and 7

[2]

Revised, see Note 2

[3]

Restated and Revised, see Note 2

[4]

Restated and Revised, see Note 2

Restatement_and_Revisions_Cons1

Restatement and Revisions Consolidated Statements of Cash Flows (Parenthetical) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Net cash provided by (used in) operating activities	$1,161	[1]	($1,638)
Net cash provided by (used in) investing activities	3,080	[1]	-7,149
Previously Reported	'		'
Net cash provided by (used in) operating activities	1,703	[2]	'
Net cash provided by (used in) investing activities	3,622	[2]	'
Previously Reported | OverStatement	'		'
Net cash provided by (used in) operating activities	1,100		'
Net cash provided by (used in) investing activities	$1,100		'
[1]	Restated and Revised, see Note 2
[2]	The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.

Revenue_and_Components_of_Net_

Revenue and Components of Net Income Related to Discontinued Operations (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'		'
Net income from discontinued operations	'	[1]	$170
Basic and diluted net income per share on discontinued operations	'	[1]	$0.01
Segment, Discontinued Operations	'		'
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'		'
Revenue	'		590
Income from discontinued operations before income taxes	'		284
Provision for income taxes	'		-114
Net income from discontinued operations	'		$170
Basic and diluted net income per share on discontinued operations	'		$0.01
[1]	Restated and Revised, see Note 2

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012
	USD ($)	Segment, Discontinued Operations	Segment, Discontinued Operations	Segment, Discontinued Operations
		USD ($)	CNY	USD ($)
Discontinued Operations [Line Items]	'	'	'	'
Date of agreement for sale of business	'	11-Jan-12	11-Jan-12	'
Sale of equity interest	'	100.00%	100.00%	'
Proceed from sale of Business	'	$2,100,000	13,000,000	'
Gain (loss) on sale of Business	$636,000	'	'	$600,000
Closing date of agreement for sale of business	'	13-Mar-12	13-Mar-12	'

Summary_of_Unrealized_Gains_an

Summary of Unrealized Gains and Losses Related to Cash Equivalents and Investments in Marketable Securities (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	$48,319	$64,246
Gross Unrealized Gains	54	67
Gross Unrealized Losses	-6	-1
Fair Value	48,367	64,312
Cash and Cash Equivalents | Money Market Funds	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	11	11
Gross Unrealized Gains	'	'
Gross Unrealized Losses	'	'
Fair Value	11	11
Short-term Investments	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	48,308	64,235
Gross Unrealized Gains	54	67
Gross Unrealized Losses	-6	-1
Fair Value	48,356	64,301
Short-term Investments | Money Market Funds	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	4,858	7,259
Gross Unrealized Gains	'	'
Gross Unrealized Losses	'	'
Fair Value	4,858	7,259
Short-term Investments | Corporate Bond Securities	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	27,411	23,151
Gross Unrealized Gains	49	43
Gross Unrealized Losses	-6	-1
Fair Value	27,454	23,193
Short-term Investments | U.S. Federal Agencies	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	14,138	27,241
Gross Unrealized Gains	5	10
Gross Unrealized Losses	'	'
Fair Value	14,143	27,251
Short-term Investments | Foreign Bonds and Notes	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	'	4,682
Gross Unrealized Gains	'	14
Gross Unrealized Losses	'	'
Fair Value	'	4,696
Short-term Investments | Municipal Obligations	'	'
Schedule Of Available For Sale Securities [Line Items]	'	'
Amortized Cost	1,901	1,902
Gross Unrealized Gains	'	'
Gross Unrealized Losses	'	'
Fair Value	$1,901	$1,902

Maturities_of_Short_Term_Inves

Maturities of Short Term Investments (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Investments [Line Items]	'	'
Less than 1 year	$39,647	$51,861
Due in 1 to 2 years	4,811	10,550
Due in 2 to 5 years	2,008	'
Due after 5 years	1,901	1,901
Total	$48,367	$64,312

Cash_Equivalents_and_Investmen1

Cash Equivalents and Investments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Dec. 31, 2012
			Fair Value, Inputs, Level 2	Fair Value, Inputs, Level 2
Schedule Of Investments [Line Items]	'	'	'	'
Impairment losses on marketable securities	$0	$0	'	'
Investments in marketable securities in an excess of 12 months	0	'	'	'
Time deposits at fair value	'	'	$11,900,000	$14,700,000

Fair_Value_of_Financial_Assets

Fair Value of Financial Assets (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	$48,367	$64,312
Money Market Funds	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	4,869	7,270
Corporate Bond Securities	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	27,454	23,193
U.S. Federal Agencies	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	14,143	27,251
Foreign Bonds and Notes	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	4,696
Municipal Obligations	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	1,901	1,902
Fair Value, Inputs, Level 1	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	4,869	7,270
Fair Value, Inputs, Level 1 | Money Market Funds	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	4,869	7,270
Fair Value, Inputs, Level 1 | Corporate Bond Securities	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 1 | U.S. Federal Agencies	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 1 | Foreign Bonds and Notes	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 1 | Municipal Obligations	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 2	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	43,498	57,042
Fair Value, Inputs, Level 2 | Money Market Funds	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 2 | Corporate Bond Securities	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	27,454	23,193
Fair Value, Inputs, Level 2 | U.S. Federal Agencies	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	14,143	27,251
Fair Value, Inputs, Level 2 | Foreign Bonds and Notes	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	4,696
Fair Value, Inputs, Level 2 | Municipal Obligations	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	1,901	1,902
Fair Value, Inputs, Level 3	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 3 | Money Market Funds	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 3 | Corporate Bond Securities	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 3 | U.S. Federal Agencies	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 3 | Foreign Bonds and Notes	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'
Fair Value, Inputs, Level 3 | Municipal Obligations	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Assets, fair value	'	'

Fair_Value_of_Financial_Liabil

Fair Value of Financial Liabilities (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Fair value of contingent consideration	$959	$959
Penalty payment derivative	138	138
Fair Value, Inputs, Level 1	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Fair value of contingent consideration	0	0
Penalty payment derivative	0	0
Fair Value, Inputs, Level 2	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Fair value of contingent consideration	0	0
Penalty payment derivative	0	0
Fair Value, Inputs, Level 3	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Fair value of contingent consideration	959	959
Penalty payment derivative	$138	$138

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Net Loss Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Numerator:	'		'
Loss from continuing operations	($12,240)	[1]	($11,778)
Income from discontinued operations, net of tax	'	[1]	170
Net loss	($12,240)	[1],[2],[3]	($11,608)
Denominator:	'		'
Weighted average shares used to compute basic and diluted net income (loss) per share:	30,574,032	[1]	24,870,684
Basic and diluted net income (loss) per share:	'		'
Continuing operations	($0.40)	[1]	($0.47)
Discontinued operations	'	[1]	$0.01
Net loss	($0.40)	[1]	($0.46)
[1]	Restated and Revised, see Note 2
[2]	Restated and Revised, see Note 2
[3]	Restated and Revised, see Note 2

Potentially_Dilutive_Securitie

Potentially Dilutive Securities Excluded From Computation of Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Potentially dilutive securities, excluded from computation of diluted net income (loss) per share	4,096,282	3,833,402
Employee Stock Option	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Potentially dilutive securities, excluded from computation of diluted net income (loss) per share	2,758,964	2,613,907
Restricted Stock Units (RSUs)	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Potentially dilutive securities, excluded from computation of diluted net income (loss) per share	848,867	662,944
Employee Stock Purchase Plan	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Potentially dilutive securities, excluded from computation of diluted net income (loss) per share	483,969	552,069
Common Stock Warrants	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Potentially dilutive securities, excluded from computation of diluted net income (loss) per share	4,482	4,482

Business_Combination_Additiona

Business Combination - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	Mar. 29, 2013	Mar. 31, 2013		Mar. 31, 2012
Business Acquisition [Line Items]	'	'		'
Acquisition-related transaction costs	'	$4,510,000	[1]	$394,000
Weighted average amortization period for intangible assets	'5 years 4 months 24 days	'		'
Cost of goods sold	'	44,306,000	[1]	42,817,000
Optical Components Business Units	'	'		'
Business Acquisition [Line Items]	'	'		'
Total consideration	'	24,258,000		'
Cash consideration paid	'	14,087,000		'
Withheld and placed into escrow	'	2,000,000		'
Percentage of notes unpaid balance per year	1.50%	'		'
Acquisition-related transaction costs	4,500,000	'		'
Royalty rate on total revenue	2.00%	'		'
Optical Components Business Units | Inventory	'	'		'
Business Acquisition [Line Items]	'	'		'
Fair value of assets	'	-6,700,000		'
Optical Components Business Units | Property, Plant and Equipment	'	'		'
Business Acquisition [Line Items]	'	'		'
Fair value of assets	'	2,800,000		'
Optical Components Business Units | Customer relationships	'	'		'
Business Acquisition [Line Items]	'	'		'
Intangible assets useful life	'6 years	'		'
Fair value of assets	'	1,700,000		'
Optical Components Business Units | Minimum	'	'		'
Business Acquisition [Line Items]	'	'		'
Property, plant and equipment useful life	'2 years	'		'
Optical Components Business Units | Minimum | Developed Technology	'	'		'
Business Acquisition [Line Items]	'	'		'
Intangible assets useful life	'4 years	'		'
Optical Components Business Units | Maximum	'	'		'
Business Acquisition [Line Items]	'	'		'
Property, plant and equipment useful life	'10 years	'		'
Optical Components Business Units | Maximum | Developed Technology	'	'		'
Business Acquisition [Line Items]	'	'		'
Intangible assets useful life	'5 years	'		'
Optical Components Business Units | Notes Payable | To be paid in three equal installments	'	'		'
Business Acquisition [Line Items]	'	'		'
Liabilities assumed	11,130,000	11,130,000		'
Optical Components Business Units | Other Liability	'	'		'
Business Acquisition [Line Items]	'	'		'
Liabilities assumed	'	8,844,000		'
Consolidation, Eliminations | Pro Forma	'	'		'
Business Acquisition [Line Items]	'	'		'
Acquisition transaction costs	'	4,500,000		'
Acquisition revenue	'	1,900,000		400,000
Acquisition cost of goods sold	'	'		2,500,000
Consolidation, Eliminations | Optical Components Business Units | Pro Forma	'	'		'
Business Acquisition [Line Items]	'	'		'
Cost of goods sold	'	$1,800,000		$300,000
[1]	Restated and Revised, see Note 2

Acquisition_Accounting_and_Tan

Acquisition Accounting and Tangible and Intangible Assets Acquired (Detail) (Optical Components Business Units, USD $)	Mar. 31, 2013		Mar. 29, 2013
In Thousands, unless otherwise specified
Business Acquisition [Line Items]	'		'
Cash paid upon closing	$14,087		'
Total purchase consideration	24,258		'
Other Liability	'		'
Business Acquisition [Line Items]	'		'
Liabilities assumed	8,844		'
To be paid in three equal installments | Notes Payable	'		'
Business Acquisition [Line Items]	'		'
Liabilities assumed	11,130		11,130
Initial Preliminary Allocation	'		'
Business Acquisition [Line Items]	'		'
Cash paid upon closing	14,087		'
Net receivable from Lapis	-959		'
Liabilities assumed	8,819		'
Total purchase consideration	24,258		'
Inventory	13,309		'
Other current assets	35		'
Land, property, plant and equipment	14,433	[1]	'
Fair Value of assets acquired	33,077		'
Initial Preliminary Allocation | Other Liability	'		'
Business Acquisition [Line Items]	'		'
Pension and retirement obligations	6,471		'
Other compensation-related liabilities	1,083		'
Other current liabilities	1,265		'
Initial Preliminary Allocation | To be paid in three equal installments | Notes Payable	'		'
Business Acquisition [Line Items]	'		'
Liabilities assumed	11,130		'
Initial Preliminary Allocation | Developed Technology	'		'
Business Acquisition [Line Items]	'		'
Intangible assets acquired	2,120		'
Initial Preliminary Allocation | Customer relationships	'		'
Business Acquisition [Line Items]	'		'
Intangible assets acquired	$3,180		'
[1]	(1) Includes land of $3.5 million, buildings of $3.9 million and machinery, equipment, furniture and fixtures of $7.0 million.

Acquisition_Accounting_and_Tan1

Acquisition Accounting and Tangible and Intangible Assets Acquired (parenthetical) (Detail) (Optical Components Business Units, USD $)	Mar. 31, 2013
In Thousands, unless otherwise specified
Land	'
Business Acquisition [Line Items]	'
Land, property, plant and equipment	$3,500
Buildings	'
Business Acquisition [Line Items]	'
Land, property, plant and equipment	3,900
Machinery, equipment, furniture and fixtures	'
Business Acquisition [Line Items]	'
Land, property, plant and equipment	$7,000

Pro_Forma_Results_of_Operation

Pro Forma Results of Operations (Detail) (Optical Components Business Units, USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Optical Components Business Units	'	'
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]	'	'
Revenue	$68,754	$67,537
Net loss	($5,277)	($12,038)
Basic and diluted net loss per share	($0.17)	($0.48)

Accounts_Receivable_Net_Detail

Accounts Receivable, Net (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Notes And Loans Receivable [Line Items]	'		'
Accounts receivable	$58,878		$66,338
Trade notes receivable	5,375		4,979
Allowance for doubtful accounts	-986		-963
Accounts Receivable, Net, Total	$63,267	[1]	$70,354	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Inventory_Detail

Inventory (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Line Items]	'		'
Raw materials	$26,332		$20,520
Work in process	20,560		8,603
Finished goods	14,967	[1]	14,670	[1]
Inventories	$61,859	[2]	$43,793	[3]
[1]	Finished goods inventory at offsite managed inventory locations was $4.8 million and $4.5 million as of March 31, 2013 and December 31, 2012, respectively.
[2]	Restated and Revised, see Notes 2 and 7
[3]	Revised, see Note 2

Inventory_Parenthetical_Detail

Inventory (Parenthetical) (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Inventory Disclosure [Line Items]	'	'
Finished goods, at vendor managed inventory locations	$4.80	$4.50

Purchased_Intangible_Assets_De

Purchased Intangible Assets (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Finite Lived Intangible Assets [Line Items]	'		'
Gross Assets	$51,731		$46,379
Accumulated Amortization	-32,965		-32,166
Net Assets	18,766	[1]	14,213	[2]
Technology and patents	'		'
Finite Lived Intangible Assets [Line Items]	'		'
Gross Assets	34,295		32,176
Accumulated Amortization	-23,405		-22,869
Net Assets	10,890		9,307
Customer relationships	'		'
Finite Lived Intangible Assets [Line Items]	'		'
Gross Assets	15,128		11,898
Accumulated Amortization	-8,392		-8,148
Net Assets	6,736		3,750
Leasehold interest	'		'
Finite Lived Intangible Assets [Line Items]	'		'
Gross Assets	1,358		1,355
Accumulated Amortization	-234		-241
Net Assets	1,124		1,114
Noncompete agreements	'		'
Finite Lived Intangible Assets [Line Items]	'		'
Gross Assets	950		950
Accumulated Amortization	-934		-908
Net Assets	$16		$42
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Amortization_Expense_of_Compan

Amortization Expense of Company's Purchased Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Finite Lived Intangible Assets [Line Items]	'		'
Cost of goods sold	$428		$598
Operating expenses	321	[1]	354
Total	$749		$952
[1]	Restated and Revised, see Note 2

Estimated_Future_Amortization_

Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Expected Amortization Expense [Line Items]	'		'
2013 (remaining 9 months)	$3,617		'
2014	4,505		'
2015	4,490		'
2016	3,743		'
2017	814		'
Thereafter	1,597		'
Net Assets	$18,766	[1]	$14,213	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Accrued_and_Other_Current_Liab

Accrued and Other Current Liabilities (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Payable And Accrued Liabilities [Line Items]	'		'
Employee-related	$9,731		$12,293
Other	15,143		7,666
Accrued and other current liabilities	$24,874	[1]	$19,959	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Balance_Sheet_Components_Addit

Balance Sheet Components - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Summary Of Significant Accounting Policies [Line Items]	'		'
Product warranty period, minimum	'1 year		'
Product warranty period, maximum	'2 years		'
Restructuring charges	$325,000	[1]	$130,000
Restructuring obligation	$300,000		'
[1]	Restated and Revised, see Note 2

Summary_of_Movement_in_Warrant

Summary of Movement in Warranty Accrual (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Product Liability Contingency [Line Items]	'	'
Beginning balance	$1,072	$1,443
Warranty accruals	26	19
Settlements and adjustments	86	-247
Ending balance	$1,184	$1,215

Other_Noncurrent_Liabilities_D

Other Noncurrent Liabilities (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Payable And Accrued Liabilities [Line Items]	'		'
Employee-related	$6,712		$188
Penalty payment derivative	138		138
Other	1,297		1,536
Other noncurrent liabilities	$8,147	[1]	$1,862	[2]
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Components_of_Debt_Obligations

Components of Debt, Obligations, Weighted Average Interest Rate and Additional Fair Value Information Relating to Outstanding Debt Instruments (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'		'
Notes payable, carrying amount	$10,431	[1]	$12,003	[2]
Short-term debt, carrying amount	5,250		5,000
Total short-term debt, carrying amount	8,960	[1]	5,000	[2]
Long-term debt, carrying amount	34,750		17,167
Long-term debt, net of current portion	42,170	[1]	17,167	[2]
Notes payable, fair value	10,431		12,003
Short-term debt, fair value	5,250		4,892
Total short-term debt, fair value	8,960		4,892
Long term debt, non-current portion, fair value	34,750		16,336
Long term debt, fair value	42,170		16,336
Short-term Debt	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Interest Rate	5.00%		2.20%
Total long-term debt	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Interest Rate	4.91%		2.20%
Optical Components Business Units	'		'
Debt Instrument [Line Items]	'		'
Notes payable, carrying amount	3,710		'
Long-term notes payable, carrying amount	7,420		'
Notes payable, fair value	3,710		'
Long-term notes payable, fair value	$7,420		'
Optical Components Business Units | Short-term Debt | Notes Payable	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Interest Rate	1.50%		'
Optical Components Business Units | Total long-term debt | Notes Payable	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Interest Rate	1.50%		'
[1]	Restated and Revised, see Notes 2 and 7
[2]	Revised, see Note 2

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2007

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Mar. 31, 2013

Mar. 29, 2013

Mar. 29, 2013

Mar. 29, 2013

Mar. 31, 2013

Mar. 29, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Term Loan

Equipment

Capital expenditure, authorized

Libor Plus Rate

Libor Plus Rate

Libor Plus Rate

Libor Plus Rate

Base Rate

Credit Facility

Credit Facility

Credit Facility

Credit Facility

Credit Facility

Credit Facility

Optical Components Business Units

Optical Components Business Units

Optical Components Business Units

Optical Components Business Units

Optical Components Business Units

Series of Individually Immaterial Business Acquisitions

Series of Individually Immaterial Business Acquisitions

Series of Individually Immaterial Business Acquisitions

Series of Individually Immaterial Business Acquisitions

Equipment

Term Loan

Equipment

Term Loan

Libor Plus Rate

Libor Plus Rate

Libor Plus Rate

Base Rate

Current portion of long-term debt

Total long-term debt, net of current portion

To be paid in three equal installments

To be paid in three equal installments

Capital expenditure, authorized

Libor Plus Rate

Credit Facility

Equipment

Notes Payable

Notes Payable

Libor Plus Rate

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Liabilities assumed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$3,700,000

$7,400,000

$11,130,000

$11,130,000

'

'

'

'

Obligation bear interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

'

'

'

'

'

'

'

'

Revolving line of credit, maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

12,000,000

8,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility remaining borrowing capacity

'

'

'

'

'

7,000,000

'

'

'

'

'

8,000,000

0

'

'

'

'

'

'

'

'

'

'

5,800,000

'

'

Interest rate description

'

'

'

'

'

'

'Borrowings under this revolving line of credit include an interest rate option of a base rate as defined in the agreement plus 1.5% or LIBOR plus 2.5%.

'Borrowings under this facility bear interest at a rate of LIBOR plus 2%.

'Borrowings under the term loan include an interest rate option of a base rate as defined in the agreement plus 1.75% or LIBOR plus 2.75%

'Borrowings under this facility would bear interest at a rate of LIBOR plus 2%.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The advances bear interest at a rate of LIBOR plus 2%.

'

Line of credit facility, rate

'

'

'

'

'

'

'

'

2.75%

'

1.75%

'

'

2.50%

2.00%

2.00%

1.50%

'

'

'

'

'

'

'

'

2.00%

Credit facility outstanding balance

'

'

'

28,000,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,200,000

'

'

'

Line of credit facility, expiration date

'

'

'

'2017-06

'

'

'

'

'

'

'

'2016-03

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Covenant Compliance

'The Company’s U.S. loan and security agreement requires it to maintain specified financial covenants, including a liquidity ratio, restricts its ability to incur additional debt or to engage in specified transactions and is secured by substantially all of its U.S. assets, other than intellectual property assets. As of March 31, 2013 and December 31, 2012, the Company was in compliance with the covenants contained in this agreement

'The Company’s U.S. loan and security agreement requires it to maintain specified financial covenants, including a liquidity ratio, restricts its ability to incur additional debt or to engage in specified transactions and is secured by substantially all of its U.S. assets, other than intellectual property assets. As of March 31, 2013 and December 31, 2012, the Company was in compliance with the covenants contained in this agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Warrant issued

'

'

4,482

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise price of warrant

'

'

29

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

$2,108,000

[1]

$2,626,000

[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Restated and Revised, see Notes 2 and 7

[2]

Revised, see Note 2

Future_Minimum_Commitments_Und

Future Minimum Commitments Under All Operating Leases (Detail) (USD $)	Mar. 31, 2013
In Thousands, unless otherwise specified
Operating Leased Assets [Line Items]	'
2013 (remaining 9 months)	$1,593
2014	1,385
2015	1,188
2016	666
2017	500
Thereafter	968
Operating Leases, Future Minimum Payments Due, Total	$6,300

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	5-May-10	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Oct. 12, 2011
					Santur Corporation	Santur Corporation	Santur Corporation
Commitments And Contingencies Disclosure [Line Items]	'	'	'	'	'	'	'
Rent expense	'	$600,000	$500,000	'	'	'	'
Agreement period not to refile claims	'90 day	'	'	'	'	'	'
Total outstanding purchase obligations	'	26,200,000	'	'	'	'	'
Additional contingent payable amount	'	'	'	'	'	'	7,500,000
Fair value of contingent consideration	'	$959,000	'	$959,000	$959,000	$959,000	'

Reserved_Shares_of_authorized_

Reserved Shares of authorized but Unissued Common Stock (Detail)	Mar. 31, 2013
Share Based Compensation Shares Authorized Under Award Type [Line Items]	'
Common stock	5,350,828
Employee Stock Option	'
Share Based Compensation Shares Authorized Under Award Type [Line Items]	'
Common stock	5,088,612
Employee Stock Purchase Plans	'
Share Based Compensation Shares Authorized Under Award Type [Line Items]	'
Common stock	257,734
Common Stock Warrants	'
Share Based Compensation Shares Authorized Under Award Type [Line Items]	'
Common stock	4,482

Summary_of_Stock_Option_and_Re

Summary of Stock Option and Restricted Stock Unit Activity (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Shares Available for Grant	'	'
Beginning Balance	382,668	'
Authorized for issuance	1,069,115	'
Granted	-30,000	'
Exercised/Converted	0	'
Forfeited	58,998	'
Ending Balance	1,480,781	'
Number of Shares	'	'
Beginning Balance	2,773,887	'
Authorized for issuance	0	'
Granted	17,800	'
Exercised/Converted	-18,251	'
Forfeited	-14,472	'
Ending Balance	2,758,964	'
Weighted Average Exercise Price	'	'
Beginning Balance	$5.87	'
Granted	$5.60	'
Exercised/Converted	$4.32	'
Forfeited	$8.43	'
Ending Balance	$5.86	'
Restricted Stock Units (RSUs)	'	'
Number of Units	'	'
Beginning Balance	924,823	'
Granted	12,200	'
Exercised/Converted	-51,634	'
Forfeited	-36,522	'
Ending Balance	848,867	'
Weighted Average Grant Date Fair Value	'	'
Beginning Balance	$5.84	'
Granted	$5.74	$6.10
Exercised/Converted	$6.12	'
Forfeited	$5.84	'
Ending Balance	$5.82	'

Summary_of_Information_about_S

Summary of Information about Stock Options Outstanding (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013
Number of Shares	'
Vested and expected to vest	2,700,303
Exercisable	1,902,220
Weighted Average Exercise Price	'
Vested and expected to vest	$5.87
Exercisable	$5.67
Weighted Average Remaining Contractual Term (Years)	'
Vested and expected to vest	'6 years 4 months 21 days
Exercisable	'5 years 6 months
Aggregate Intrinsic Value (in Thousands)	'
Vested and expected to vest	$1,228
Exercisable	$1,143

Summary_of_Information_about_R

Summary of Information about Restricted Stock Units Outstanding (Detail) (Restricted Stock Units (RSUs), USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013
Restricted Stock Units (RSUs)	'
Number of shares	'
Vested and expected to vest	782,071
Weighted Average Grant Date Fair Value	'
Vested and expected to vest	$5.82
Weighted Average Remaining Contractual Term (Years)	'
Vested and expected to vest	'1 year 1 month 24 days
Aggregate Intrinsic Value	'
Vested and expected to vest	$3,996

Summary_of_Stock_Appreciation_

Summary of Stock Appreciation Unit Activity (Detail) (Stock Appreciation Rights (SARs), USD $)	3 Months Ended
	Mar. 31, 2013
Stock Appreciation Rights (SARs)	'
Stock Appreciation Units	'
Beginning Balance	212,534
Cancelled	-4,423
Exercised	-316
Ending Balance	207,795
Weighted-Average Exercise Price	'
Beginning Balance	$7.07
Cancelled	$8.93
Exercised	$4.25
Ending Balance	$7.04

Summary_of_Information_about_S1

Summary of Information about Stock Appreciation Units Outstanding (Detail) (Stock Appreciation Rights (SARs), USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013
Stock Appreciation Rights (SARs)	'
Number of Units	'
Vested and expected to vest	207,396
Exercisable	181,913
Weighted-Average Exercise Price	'
Vested and expected to vest	$7.03
Exercisable	$6.71
Weighted Average Remaining Contractual Term	'
Vested and expected to vest	'5 years 10 months 10 days
Exercisable	'5 years 8 months 9 days
Aggregate Intrinsic Value	'
Vested and expected to vest	$101
Exercisable	$98

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

12 Months Ended

Share data in Millions, except Per Share data, unless otherwise specified

Mar. 31, 2013

Mar. 31, 2012

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Apr. 27, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Embedded Derivative Financial Instruments

Private Placement

Private Placement

Private Placement

Private Placement

Private Placement

Private Placement

Private Placement

Private Placement

Accumulated Translation Adjustment

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Stock Appreciation Rights (SARs)

Stock Appreciation Rights (SARs)

RUSSIAN FEDERATION

Embedded Derivative Financial Instruments

Embedded Derivative Financial Instruments

Scenario One

Performance Guarantee

Performance Guarantee

Performance Guarantee

Minimum

Private Placement

Capital Addition Purchase Commitments

General Working Capital And Research And Development Expenditures

July 31, 2014 to March 31, 2015

Minimum

Class Of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value of options exercised

$16,000

$14,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value of units exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

$301,000

$0

$0

$6,000

'

Equity Restrictions

'

'

'

'

'

'

'

'

'

'

'

'

6,300,000

'

'

'

'

'

Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

'

'

'

'

'

Common Stock Issued

'

'

'

'

4.97

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock Issue Price

'

'

'

'

$8

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of common stock, net of issuance costs

'

'

'

'

39,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock Transfer Restriction Period

'

'

'

'

'2 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Contractual Obligation

'

'

'

'

'

5,000,000

5,000,000

'

30,000,000

15,000,000

15,000,000

'

'

'

'

'

'

'

Percentage of investment obligation that can be satisfied by research and development

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

80.00%

Targeted expansion completion date

'

'

'

'

'

'

'

31-Jul-14

'

'

'

'

'

'

'

'

'

'

Expected aggregate revenue from sales of its products in the Russian Federation for period July 1, 2012 to March 31, 2015

'

'

'

'

'

'

'

'

'

'

'

26,800,000

'

'

'

'

'

'

Additional paid-in capital

440,144,000

[1]

'

438,858,000

[2]

4,862,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Penalty payment derivative

$138,000

'

$138,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Restated and Revised, see Notes 2 and 7

[2]

Revised, see Note 2

StockBased_Compensation_Expens

Stock-Based Compensation Expense (Detail) (Stock Based Compensation Expense, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$1,202	$1,144
Cost of Goods Sold	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	243	188
Research and Development Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	418	469
Selling and Marketing Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	238	209
General and Administrative Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$303	$278

Summary_of_StockBased_Compensa

Summary of Stock-Based Compensation Expense Recognized for Stock Option (Detail) (Employee Stock Option, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$504	$538
Cost of Goods Sold	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	79	61
Research and Development Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	174	209
Selling and Marketing Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	78	94
General and Administrative Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$173	$174

Fair_Value_of_All_Employee_Sto

Fair Value of All Employee Stock Options (Detail) (Employee Stock Option)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Employee Stock Option	'	'
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Line Items]	'	'
Weighted-average expected term (years)	'6 years 6 months 18 days	'6 years 8 months 16 days
Weighted-average volatility	76.00%	71.00%
Risk-free interest rate	1.08%	1.81%
Expected dividends	0.00%	0.00%

Expense_Recognized_for_Stock_A

Expense Recognized for Stock Appreciation Units (Detail) (Stock Appreciation Rights (SARs), USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	($78)	($21)
Cost of Goods Sold	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	-24	-5
Research and Development Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	-32	-9
Selling and Marketing Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	-13	-4
General and Administrative Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	($9)	($3)

Estimated_Fair_Value_of_All_Em

Estimated Fair Value of All Employee Stock Appreciation Units Using Black-Scholes Valuation Model (Detail) (Stock Appreciation Rights (SARs))	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock Appreciation Rights (SARs)	'	'
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Line Items]	'	'
Weighted-average expected term (years)	'2 years 7 months 10 days	'3 years 4 months 21 days
Weighted-average volatility	63.00%	69.00%
Risk-free interest rate Minimum	0.20%	0.42%
Risk-free interest rate Maximum	0.46%	1.04%
Expected dividends	0.00%	0.00%

Components_of_Expense_Relating

Components of Expense Relating to ESPP (Detail) (Employee Stock Purchase Plan, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$278	$320
Cost of Goods Sold	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	80	67
Research and Development Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	120	176
Selling and Marketing Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	38	40
General and Administrative Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$40	$37

Call_Option_and_Put_Option_wer

Call Option and Put Option were Valued Using Black-Scholes Option Pricing Model (Detail) (Employee Stock Purchase Plan)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Employee Stock Purchase Plan	'	'
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Line Items]	'	'
Weighted-average expected term (years)	'8 months 27 days	'8 months 19 days
Weighted-average volatility	48.00%	71.00%
Risk-free interest rate Minimum	0.13%	0.04%
Risk-free interest rate Maximum	0.16%	0.11%
Expected dividends	0.00%	0.00%

Recovered_Sheet3

Stock-based Compensation Expense Recognized for Restricted Stock Units (Detail) (Restricted Stock Units (RSUs), USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$498	$307
Cost of Goods Sold	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	108	65
Research and Development Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	156	93
Selling and Marketing Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	135	79
General and Administrative Expense	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'
Allocated share based compensation expense	$99	$70

Stock_Based_Compensation_Addit

Stock Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended								3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012
	Discounted Employee Stock Purchase Plan	Call Option	Put Option	Employee Stock Option	Employee Stock Option	Stock Appreciation Rights (SARs)	Stock Appreciation Rights (SARs)	Employees Stock Purchase Rights	Restricted Stock Units (RSUs)	Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'	'
Weighted average grant date fair value	'	'	'	$3.80	$4.33	'	'	'	'	'
Unrecognized stock-based compensation expense	'	'	'	$3.10	'	$0.05	'	$0.40	$3.30	'
Remaining Weighted-average Period	'	'	'	'2 years 4 months 28 days	'	'1 year 1 month 6 days	'	'	'1 year 11 months 1 day	'
Liability for Settlement	'	'	'	'	'	$0.30	$0.40	'	'	'
Percentage on the stock purchase right	15.00%	85.00%	15.00%	'	'	'	'	'	'	'
Weighted-average fair value granted	'	'	'	'	'	'	'	'	$5.74	$6.10

Income_Tax_Benefit_and_Effecti

Income Tax Benefit and Effective Tax Rate (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Income Taxes [Line Items]	'		'
Income tax (expense) benefit	($183)	[1]	$60
Effective tax rate	2.00%		1.00%
[1]	Restated and Revised, see Note 2

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012
Income Taxes [Line Items]	'		'
Income tax (expense) benefit	($183)	[1]	$60
Subsidiaries	'		'
Income Taxes [Line Items]	'		'
Statutory tax rate	25.00%		'
Effective income tax rate	15.00%		'
[1]	Restated and Revised, see Note 2