Peregrine Semiconductor (PSMI) 10-Q 4 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 28, 2013	Oct. 15, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	28-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'PSMI	'
Entity Registrant Name	'PEREGRINE SEMICONDUCTOR CORP	'
Entity Central Index Key	'0000880177	'
Current Fiscal Year End Date	'--12-28	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	32,686,216

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$17,206	$44,106
Short-term marketable securities	23,213	30,361
Accounts receivable, net	18,322	13,353
Inventories	52,311	57,017
Prepaids and other current assets	7,955	11,108
Total current assets	119,007	155,945
Property and equipment, net	23,358	22,871
Long-term marketable securities	22,664	18,892
Other assets	211	210
Total assets	165,240	197,918
Current liabilities:	'	'
Accounts payable	12,465	22,306
Accrued liabilities	9,151	12,672
Accrued compensation	3,664	5,726
Customer deposits	4,954	24,425
Deferred revenue	5,627	12,755
Current portion of obligations under capital leases	10	11
Total current liabilities	35,871	77,895
Obligations under capital leases, less current portion	18	18
Other long-term liabilities	826	886
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Preferred stock, $.001 par value, 5,000 shares authorized at September 28, 2013 and December 29, 2012; no shares issued and outstanding at September 28, 2013 and December 29, 2012	'	'
Common stock, $.001 par value, 100,000 shares authorized at September 28, 2013 and December 29, 2012, 32,645 and 31,855 shares issued and outstanding at September 28, 2013 and December 29, 2012, respectively	33	32
Additional paid-in capital	346,837	340,221
Accumulated deficit	-218,158	-220,935
Accumulated other comprehensive loss	-187	-199
Total stockholders' equity	128,525	119,119
Total liabilities and stockholders' equity	$165,240	$197,918

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, except Per Share data, unless otherwise specified
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	32,645	31,855
Common stock, shares outstanding	32,645	31,855

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Income Statement [Abstract]	'	'	'	'
Net revenue	$60,002	$60,575	$158,992	$140,909
Cost of net revenue	34,749	35,560	93,203	88,418
Gross profit	25,253	25,015	65,789	52,491
Operating expense:	'	'	'	'
Research and development	10,777	9,355	31,417	23,518
Selling, general and administrative	10,210	10,990	31,487	26,183
Total operating expense	20,987	20,345	62,904	49,701
Income from operations	4,266	4,670	2,885	2,790
Interest expense, net	-27	-213	-165	-1,247
Other income (expense), net	99	-52	50	-132
Income before income taxes	4,338	4,405	2,770	1,411
Income tax benefit	-95	-308	-7	-234
Net income	4,433	4,713	2,777	1,645
Net income allocable to preferred stockholders	0	-2,279	0	-1,362
Net income attributable to common stockholders	$4,433	$2,434	$2,777	$283
Net income per share attributable to common stockholders:	'	'	'	'
Basic	$0.14	$0.12	$0.09	$0.03
Diluted	$0.12	$0.10	$0.08	$0.02
Shares used to compute net income per share attributable to common stockholders:	'	'	'	'
Basic	32,394	19,748	32,163	8,442
Diluted	35,804	24,351	35,738	12,692

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$4,433	$4,713	$2,777	$1,645
Foreign currency translation adjustments	3	-12	14	-10
Unrealized loss on marketable securities	-2	-21	-2	-21
Comprehensive income	$4,434	$4,680	$2,789	$1,614

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Operating activities	'	'
Net income	$2,777	$1,645
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	4,825	3,132
Stock-based compensation	4,854	3,116
Revaluation of warrants to fair value	0	633
Imputed interest related to deposit arrangements, net	-307	273
Amortization of premium and discount on investments, net	293	48
Cash received for lease incentives	135	0
Changes in operating assets and liabilities:	'	'
Accounts receivable	-4,956	-8,727
Inventories	4,717	-26,709
Prepaids and other current and noncurrent assets	3,676	-6,354
Accounts payable and accrued liabilities	-16,144	21,606
Customer deposits	-11,425	29,791
Deferred revenue	-6,787	7,122
Net cash provided by (used in) operating activities	-18,342	25,576
Investing activities	'	'
Purchases of property and equipment	-5,304	-13,157
Purchase of marketable securities	-28,552	-48,462
Sale and maturity of marketable securities	31,607	0
Net cash used in investing activities	-2,249	-61,619
Financing activities	'	'
Proceeds from customer deposit financing arrangement	0	13,000
Payments on customer deposit financing arrangement	-8,046	0
Proceeds from line of credit	0	3,000
Payments on line of credit	0	-10,749
Payments on obligations under capital leases	-7	-661
Payments on notes payable	0	-1,618
Proceeds from exercise of stock options	1,759	369
Proceeds from exercise of warrants	0	31
Proceeds from initial public offering, net of offering cost	0	80,278
Costs paid in connection with initial public offering	0	-1,707
Net cash provided by (used in) financing activities	-6,294	81,943
Effect of exchange rate changes on cash and cash equivalents	-15	-12
Net change in cash and cash equivalents	-26,900	45,888
Cash and cash equivalents at beginning of period	44,106	12,119
Cash and cash equivalents at end of period	17,206	58,007
Supplemental disclosure of non cash financing activities	'	'
Capital lease obligation for capital equipment	28	0
Reclassification of restricted stock to equity upon vesting of early exercised options	$4	$12

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
Organization and Summary of Significant Accounting Policies	'
	Organization and Summary of Significant Accounting Policies
	The Company
	Peregrine Semiconductor Corporation (the Company) is a fabless provider of high performance radio frequency integrated circuits (RFICs). The Company’s solutions leverage its proprietary UltraCMOS technology which enables the design, manufacture, and integration of multiple RF, mixed signal, and digital functions on a single chip. The Company’s solutions target a broad range of applications in the aerospace and defense, automotive, broadband, industrial, mobile wireless device, test and measurement equipment, and wireless infrastructure markets.
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring items, necessary for a fair presentation of the financial statements for interim periods in accordance with accounting principles generally accepted in the United States (US GAAP). The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended December 29, 2012 included in the Company’s Annual Report on Form 10-K filed on February 19, 2013 with the Securities and Exchange Commission (“SEC”). The Company’s accounting policies are described in the “Notes to consolidated financial statements” in our Form 10-K and updated as necessary, in this Form 10-Q. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from audited financial statements, but does not include all disclosures required by US GAAP. The results of operations for the three and nine months ended September 28, 2013 are not necessarily indicative of the operating results for the full year or for any other subsequent interim period.
	Principles of Consolidation
	The consolidated financial statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated upon consolidation.
	Accounting Periods
	The Company uses a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal year 2012 was a 52-week year ending on December 29, 2012. The Company’s first three quarters for fiscal year 2013 and 2012 were 39-week periods ending on September 28, 2013 and September 29, 2012, respectively.
	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements as well as the reported amounts of net revenue and expense during the reporting period. The Company regularly evaluates estimates and assumptions related to areas such as revenue recognition, allowances for doubtful accounts, warranty obligations, inventory valuation, stock-based compensation expense, deferred income tax valuation allowances, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from these estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.
	Concentration of Credit Risk
	Financial assets and liabilities, which potentially subject the Company to concentrations of credit risk, consist primarily of cash equivalents, marketable securities, and accounts receivable. The Company limits its exposure to credit loss by placing its cash in high credit quality financial investments. At times, such deposits may be in excess of insured limits. The Company has not experienced any significant losses on its investments.
	Customers that exceed 10% of total net revenue were as follows:
		Three Months Ended				Nine Months Ended
		September 28,		September 29,		September 28,		September 29,
		2013		2012		2013		2012
	Macnica	76	%	78	%	71	%	71	%
	Richardson	*		*		11	%	11	%
	*    Did not exceed 10% of total revenues for the respective period.
	Fair Value of Financial Instruments
	The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company’s financial instruments consist principally of cash and cash equivalents and marketable securities. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:
	Level 1: Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.
	Level 2: Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.
	Level 3: Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.
	The fair value of the Company’s cash equivalents was determined based on “Level 1” inputs. The fair value of marketable securities was determined based on “Level 2” inputs. The fair value of the Company’s “Level 2” instruments were valued based on the market approach technique which uses quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data. The Company does not have any financial instruments in the “Level 3” category. The Company believes that the recorded values of all of the other financial assets and liabilities approximate their current fair values because of maturity and respective duration of these assets and liabilities.

Net_Income_per_Share

Net Income per Share	9 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]	'
Net Income per Share	'
	Net Income per Share
	Basic net income per share is calculated by dividing net income attributable to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted net income per share is calculated on the basis of the weighted-average number of shares of common stock including the effect of potential dilution that could occur if securities to issue common stock were exercised or converted into common stock.
		Three Months Ended					Nine Months Ended
		September 28,		September 29,			September 28,		September 29,
		2013		2012			2013		2012
	Numerator:
	Net income	$	4,433	$	4,713		$	2,777	$	1,645
	Net income allocable to preferred stockholders	—		(2,279		)	—		(1,362		)
	Net income attributable to common stockholders	$	4,433	$	2,434		$	2,777	$	283
	Denominator:
	Weighted average common shares outstanding	32,394		19,759			32,165		8,455
	Less: weighted average unvested shares of common stock subject to repurchase	—		11			2		13
	Weighted average common shares used in computing basic and diluted net income per share	32,394		19,748			32,163		8,442
	Weighted average effect of potentially dilutive securities:
	Stock options	3,408		4,601			3,573		4,248
	Common stock warrants	2		2			2		2
	Weighted average common shares used in computing diluted net income per share	35,804		24,351			35,738		12,692
	Net income per share attributable to common stockholders:
	Basic	$	0.14	$	0.12		$	0.09	$	0.03
	Diluted	$	0.12	$	0.1		$	0.08	$	0.02
	Historical outstanding anti-dilutive securities not included in diluted net income per share calculation:
	Common stock options	3,612		663			3,666		7,492

Certain_Financial_Statement_In

Certain Financial Statement Information	9 Months Ended
	Sep. 28, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Certain Financial Statement Information	'
	Certain Financial Statement Information
	Inventories consisted of the following:
		September 28,				December 29,
		2013				2012
	Raw materials	$	19,938			$	20,986
	Work in progress	22,985				15,494
	Finished goods	9,388				20,537
		$	52,311			$	57,017
	During the quarter ended September 28, 2013, the Company recorded reductions to the carrying value of inventories of $1,374 as a result of a lower of cost or market valuation. These write downs were due to anticipated selling price reductions the Company believes necessary to stimulate customer demand for certain products. These reductions were recorded in cost of net revenues.
	Included in the table are inventories held by others, which include distributors and third-parties in the Company’s supply chain of $6,361 and $13,616 at September 28, 2013 and December 29, 2012, respectively.
	Property and equipment consist of the following:
		Useful Life		September 28,				December 29,
		(Years)		2013				2012
	Computer equipment and software	3 - 5		$	6,217			$	5,171
	Machinery and equipment	5		39,503				33,753
	Office furniture and equipment	7		1,081				775
	Leasehold improvements	*		5,137				4,477
	Construction in progress			1,180				3,831
				53,118				48,007
	Less accumulated depreciation and amortization			(29,760		)		(25,136		)
				$	23,358			$	22,871
	*    Leasehold improvements are amortized over the estimated life of the asset or remaining term of the lease, whichever is shorter.
	Depreciation and amortization expense was $1,721 and $1,183 for the three months ended September 28, 2013 and September 29, 2012 and $4,825 and $3,132 for the nine months ended September 28, 2013 and September 29, 2012, respectively.
	Accrued liabilities consisted of the following:
		September 28,				December 29,
		2013				2012
	Accrued inventory purchases	$	1,123			$	1,125
	Accrued inventory repurchase obligation	4,728				6,900
	Accrued other	3,300				4,647
		$	9,151			$	12,672
	Accrued inventory repurchase obligation represents raw materials sold to suppliers for processing. These raw materials remain part of the Company’s total inventory and the transactions include only customary terms and conditions, such as shipping and payment terms.

Financial_Instruments

Financial Instruments	9 Months Ended
	Sep. 28, 2013
Investments, All Other Investments [Abstract]	'
Financial Instruments	'
	Financial Instruments
	The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of September 28, 2013:
		September 28, 2013
		Cost		Unrealized		Unrealized			Fair		Cash and		Short-Term		Long-Term
				Gains		Losses			Value		Cash		Marketable		Marketable
											Equivalents		Securities		Securities
	Cash	$	5,971	$	—	$	—		$	5,971	$	5,971	$	—	$	—
	Level 1:
	Money market funds	10,234		—		—			10,234		10,234		—		—
	Subtotal	10,234		—		—			10,234		10,234		—		—
	Level 2:
	U.S. Agency securities	23,562		7		(1		)	23,568		—		11,564		12,004
	Certificates of deposit	8,120		4		(14		)	8,110		—		5,479		2,631
	Commercial paper	1,001		—		—			1,001		1,001		—		—
	Corporate notes and bonds	14,197		7		(5		)	14,199		—		6,170		8,029
	Subtotal	46,880		18		(20		)	46,878		1,001		23,213		22,664
	Total	$	63,085	$	18	$	(20	)	$	63,083	$	17,206	$	23,213	$	22,664
	There were no transfers between Level 1, Level 2 or Level 3 securities in the nine months ended September 28, 2013. All of the long-term marketable securities had remaining maturities of between one and two years in duration at September 28, 2013.
	As of September 28, 2013, the Company had 32 investments in marketable securities with a fair value of $15,821 that were in an unrealized loss position of $20 for less than 12 months. The Company considers the declines in market value of its marketable securities investment portfolio to be temporary in nature and does not consider any of its investments other-than-temporarily impaired. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, and the Company’s intent to sell, or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis.
	The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 29, 2012:
		29-Dec-12
		Cost		Unrealized		Unrealized			Fair		Cash and		Short-Term		Long-Term
				Gains		Losses			Value		Cash		Marketable		Marketable
											Equivalents		Securities		Securities
	Cash	$	24,703	$	—	$	—		$	24,703	$	24,703	$	—	$	—
	Level 1:
	Money market funds	18,923		—		—			18,923		18,923		—		—
	Subtotal	18,923		—		—			18,923		18,923		—		—
	Level 2:
	U.S. Agency securities	24,339		2		(2		)	24,339		—		13,317		11,022
	Certificates of deposit	9,285		2		(3		)	9,284		480		6,642		2,162
	Commercial paper	2,893		1		—			2,894		—		2,894		—
	Corporate notes and bonds	13,211		9		(4		)	13,216		—		7,508		5,708
	Subtotal	49,728		14		(9		)	49,733		480		30,361		18,892
	Total	$	93,354	$	14	$	(9	)	$	93,359	$	44,106	$	30,361	$	18,892

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	During the three and nine months ended September 28, 2013, the Company granted 246 and 1,806, respectively, non-qualified stock options to employees and directors. The Company uses the Black-Scholes valuation model to calculate the fair value of stock options. The fair value of stock options was estimated at the grant date using the following:
		Three Months Ended						Nine Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Weighted-average expected term (years)	5			5			5			5
	Risk-free interest rate	1.38		%	0.66		%	0.78		%	0.73		%
	Dividend rate	—			—			—			—
	Volatility	60		%	63		%	61		%	63		%
	Forfeiture rate	4		%	3		%	3		%	3		%
	Estimated weighted-average fair value per stock option	$	5.35		$	8.89		$	5.16		$	8.13
	The risk-free interest rate assumption was based on the U.S. Treasury’s rates for U.S. Treasury constant maturities similar to those of the expected term of the award being valued. The assumed dividend yield was based on the Company’s expectation of not paying dividends in the foreseeable future. The Company utilizes data of peer companies to determine the weighted average expected term in an effort to better align the expected term of the Company’s options with the term experienced by the Company’s peers. In addition, due to the Company’s limited historical data, the estimated volatility incorporates the historical volatility of comparable companies whose share prices are publicly available.
	Total stock-based compensation expense recognized during the three and nine months ended September 28, 2013 and September 29, 2012 was comprised of the following:
		Three Months Ended						Nine Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Cost of net revenue	$	238		$	133		$	652		$	404
	Research and development	537			368			1,534			935
	Selling, general and administrative	953			651			2,668			1,777
		$	1,728		$	1,152		$	4,854		$	3,116

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 28, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Legal Proceedings
	On February 14, 2012, the Company filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of the Company’s patents relating to RFICs and switching technology by RF Micro Devices, Inc. (RFMD). The lawsuit alleges that certain of RFMD’s products infringe the Company’s patents relating to silicon on insulator (SOI) design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, the Company filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, the Company consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. Pursuing these actions is costly and could impose a significant burden on management and employees. The Company may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained.
	From time to time, the Company is subject to various claims and suits arising in the ordinary course of business, including commercial, employment and environmental matters. The Company does not expect that the resolution of these matters, or the matter described in the preceding paragraphs, will have a material adverse effect on its consolidated financial position or results of operations.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 28, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company recorded an income tax benefit for the three and nine months ended September 28, 2013 of $95 and $7, respectively, due to the effect of unrecognized benefits of tax losses and the release of tax reserves due to expiration of statute of limitations. The Company recorded income tax benefit of $308 and $234 for the three and nine months ended September 29, 2012, respectively.

Supply_and_Prepayment_Agreemen

Supply and Prepayment Agreement	9 Months Ended
	Sep. 28, 2013
Payables and Accruals [Abstract]	'
Supply and Prepayment Agreement	'
	Supply and Prepayment Agreement
	In March 2012, the Company entered into a supply and prepayment agreement with Murata Manufacturing Company, Ltd. (Murata). The agreement is for an initial term of 18 months. Under the terms of the original agreement, Murata agreed to prepay on certain purchase orders placed through a third party distributor and to pay the Company a total deposit of $14,000 between March and July 2012. During the quarter ended September 29, 2012, the Company and Murata agreed to reduce the deposit from $14,000 to $13,000. There were no amendments to the agreement between the Company and Murata in the nine months ended September 28, 2013. The Company is repaying the deposit at a rate based on the number of RFICs purchased by Murata over the four quarters starting from the fourth quarter of fiscal 2012 of up to $13,000. During the nine months ended September 28, 2013, the Company repaid $8,046 in deposits under the supply and prepayment agreement with Murata resulting in a remaining customer deposit of $4,954.
	During the nine months ended September 28, 2013, the Company received prepayments on purchases made by Macnica, which were applied against outstanding accounts receivable balances. There are no remaining prepayments as of September 28, 2013 as the agreement concluded on March 31, 2013 and the deposit was fully utilized in April of 2013. As of December 29, 2012, customer deposits included prepayments on purchase orders from Macnica of $11,425.
	During 2012, the Company paid $4,000 in deposits to suppliers to support production levels. During the nine months ended September 28, 2013, the Company received $3,058 in deposit repayments from suppliers resulting in a remaining balance of $942, which is included in prepaids and other current assets.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
The Company	'
	The Company
	Peregrine Semiconductor Corporation (the Company) is a fabless provider of high performance radio frequency integrated circuits (RFICs). The Company’s solutions leverage its proprietary UltraCMOS technology which enables the design, manufacture, and integration of multiple RF, mixed signal, and digital functions on a single chip. The Company’s solutions target a broad range of applications in the aerospace and defense, automotive, broadband, industrial, mobile wireless device, test and measurement equipment, and wireless infrastructure markets.
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring items, necessary for a fair presentation of the financial statements for interim periods in accordance with accounting principles generally accepted in the United States (US GAAP). The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and the notes thereto for the fiscal year ended December 29, 2012 included in the Company’s Annual Report on Form 10-K filed on February 19, 2013 with the Securities and Exchange Commission (“SEC”). The Company’s accounting policies are described in the “Notes to consolidated financial statements” in our Form 10-K and updated as necessary, in this Form 10-Q. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from audited financial statements, but does not include all disclosures required by US GAAP. The results of operations for the three and nine months ended September 28, 2013 are not necessarily indicative of the operating results for the full year or for any other subsequent interim period.
Principles of Consolidation	'
	Principles of Consolidation
	The consolidated financial statements include the accounts of the Company and its subsidiaries. All significant intercompany accounts and transactions have been eliminated upon consolidation.
Accounting Periods	'
	Accounting Periods
	The Company uses a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal year 2012 was a 52-week year ending on December 29, 2012. The Company’s first three quarters for fiscal year 2013 and 2012 were 39-week periods ending on September 28, 2013 and September 29, 2012, respectively.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements as well as the reported amounts of net revenue and expense during the reporting period. The Company regularly evaluates estimates and assumptions related to areas such as revenue recognition, allowances for doubtful accounts, warranty obligations, inventory valuation, stock-based compensation expense, deferred income tax valuation allowances, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from these estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.
Concentration of Credit Risk	'
	Concentration of Credit Risk
	Financial assets and liabilities, which potentially subject the Company to concentrations of credit risk, consist primarily of cash equivalents, marketable securities, and accounts receivable. The Company limits its exposure to credit loss by placing its cash in high credit quality financial investments. At times, such deposits may be in excess of insured limits. The Company has not experienced any significant losses on its investments.
	Customers that exceed 10% of total net revenue were as follows:
		Three Months Ended				Nine Months Ended
		September 28,		September 29,		September 28,		September 29,
		2013		2012		2013		2012
	Macnica	76	%	78	%	71	%	71	%
	Richardson	*		*		11	%	11	%
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company’s financial instruments consist principally of cash and cash equivalents and marketable securities. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:
	Level 1: Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.
	Level 2: Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.
	Level 3: Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.
	The fair value of the Company’s cash equivalents was determined based on “Level 1” inputs. The fair value of marketable securities was determined based on “Level 2” inputs. The fair value of the Company’s “Level 2” instruments were valued based on the market approach technique which uses quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data. The Company does not have any financial instruments in the “Level 3” category. The Company believes that the recorded values of all of the other financial assets and liabilities approximate their current fair values because of maturity and respective duration of these assets and liabilities.

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
Customers that Exceed 10% of Total Net Revenue	'
	Customers that exceed 10% of total net revenue were as follows:
		Three Months Ended				Nine Months Ended
		September 28,		September 29,		September 28,		September 29,
		2013		2012		2013		2012
	Macnica	76	%	78	%	71	%	71	%
	Richardson	*		*		11	%	11	%
	*    Did not exceed 10% of total revenues for the respective period.

Net_Loss_per_Share_Tables

Net Loss per Share (Tables)	9 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]	'
Net Income per Share	'
		Three Months Ended					Nine Months Ended
		September 28,		September 29,			September 28,		September 29,
		2013		2012			2013		2012
	Numerator:
	Net income	$	4,433	$	4,713		$	2,777	$	1,645
	Net income allocable to preferred stockholders	—		(2,279		)	—		(1,362		)
	Net income attributable to common stockholders	$	4,433	$	2,434		$	2,777	$	283
	Denominator:
	Weighted average common shares outstanding	32,394		19,759			32,165		8,455
	Less: weighted average unvested shares of common stock subject to repurchase	—		11			2		13
	Weighted average common shares used in computing basic and diluted net income per share	32,394		19,748			32,163		8,442
	Weighted average effect of potentially dilutive securities:
	Stock options	3,408		4,601			3,573		4,248
	Common stock warrants	2		2			2		2
	Weighted average common shares used in computing diluted net income per share	35,804		24,351			35,738		12,692
	Net income per share attributable to common stockholders:
	Basic	$	0.14	$	0.12		$	0.09	$	0.03
	Diluted	$	0.12	$	0.1		$	0.08	$	0.02
	Historical outstanding anti-dilutive securities not included in diluted net income per share calculation:
	Common stock options	3,612		663			3,666		7,492

Certain_Financial_Statement_In1

Certain Financial Statement Information (Tables)	9 Months Ended
	Sep. 28, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Inventories	'
	Inventories consisted of the following:
		September 28,				December 29,
		2013				2012
	Raw materials	$	19,938			$	20,986
	Work in progress	22,985				15,494
	Finished goods	9,388				20,537
		$	52,311			$	57,017
Property and Equipment	'
	Property and equipment consist of the following:
		Useful Life		September 28,				December 29,
		(Years)		2013				2012
	Computer equipment and software	3 - 5		$	6,217			$	5,171
	Machinery and equipment	5		39,503				33,753
	Office furniture and equipment	7		1,081				775
	Leasehold improvements	*		5,137				4,477
	Construction in progress			1,180				3,831
				53,118				48,007
	Less accumulated depreciation and amortization			(29,760		)		(25,136		)
				$	23,358			$	22,871
Accrued Liabilities	'
	Accrued liabilities consisted of the following:
		September 28,				December 29,
		2013				2012
	Accrued inventory purchases	$	1,123			$	1,125
	Accrued inventory repurchase obligation	4,728				6,900
	Accrued other	3,300				4,647
		$	9,151			$	12,672

Financial_Instruments_Tables

Financial Instruments (Tables)	9 Months Ended
	Sep. 28, 2013
Investments, All Other Investments [Abstract]	'
Cash and Marketable Securities' Cost, Unrealized Gains, Unrealized Losses and Fair Value by Significant Investment	'
	The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 29, 2012:
		29-Dec-12
		Cost		Unrealized		Unrealized			Fair		Cash and		Short-Term		Long-Term
				Gains		Losses			Value		Cash		Marketable		Marketable
											Equivalents		Securities		Securities
	Cash	$	24,703	$	—	$	—		$	24,703	$	24,703	$	—	$	—
	Level 1:
	Money market funds	18,923		—		—			18,923		18,923		—		—
	Subtotal	18,923		—		—			18,923		18,923		—		—
	Level 2:
	U.S. Agency securities	24,339		2		(2		)	24,339		—		13,317		11,022
	Certificates of deposit	9,285		2		(3		)	9,284		480		6,642		2,162
	Commercial paper	2,893		1		—			2,894		—		2,894		—
	Corporate notes and bonds	13,211		9		(4		)	13,216		—		7,508		5,708
	Subtotal	49,728		14		(9		)	49,733		480		30,361		18,892
	Total	$	93,354	$	14	$	(9	)	$	93,359	$	44,106	$	30,361	$	18,892
	The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of September 28, 2013:
		September 28, 2013
		Cost		Unrealized		Unrealized			Fair		Cash and		Short-Term		Long-Term
				Gains		Losses			Value		Cash		Marketable		Marketable
											Equivalents		Securities		Securities
	Cash	$	5,971	$	—	$	—		$	5,971	$	5,971	$	—	$	—
	Level 1:
	Money market funds	10,234		—		—			10,234		10,234		—		—
	Subtotal	10,234		—		—			10,234		10,234		—		—
	Level 2:
	U.S. Agency securities	23,562		7		(1		)	23,568		—		11,564		12,004
	Certificates of deposit	8,120		4		(14		)	8,110		—		5,479		2,631
	Commercial paper	1,001		—		—			1,001		1,001		—		—
	Corporate notes and bonds	14,197		7		(5		)	14,199		—		6,170		8,029
	Subtotal	46,880		18		(20		)	46,878		1,001		23,213		22,664
	Total	$	63,085	$	18	$	(20	)	$	63,083	$	17,206	$	23,213	$	22,664

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Fair Value of Stock Options Estimated at Grant Date	'
	The fair value of stock options was estimated at the grant date using the following:
		Three Months Ended						Nine Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Weighted-average expected term (years)	5			5			5			5
	Risk-free interest rate	1.38		%	0.66		%	0.78		%	0.73		%
	Dividend rate	—			—			—			—
	Volatility	60		%	63		%	61		%	63		%
	Forfeiture rate	4		%	3		%	3		%	3		%
	Estimated weighted-average fair value per stock option	$	5.35		$	8.89		$	5.16		$	8.13
Components of Total Stock- Based Compensation Expense Recognized	'
	Total stock-based compensation expense recognized during the three and nine months ended September 28, 2013 and September 29, 2012 was comprised of the following:
		Three Months Ended						Nine Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Cost of net revenue	$	238		$	133		$	652		$	404
	Research and development	537			368			1,534			935
	Selling, general and administrative	953			651			2,668			1,777
		$	1,728		$	1,152		$	4,854		$	3,116

Customers_that_Exceed_10_of_To

Customers that Exceed 10% of Total Net Revenue (Detail) (Sales Revenue, Net)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Macnica	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Net revenue, contribution by customers	76.00%	78.00%	71.00%	71.00%
Richardson	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Net revenue, contribution by customers	'	'	11.00%	11.00%

Net_Loss_per_Share_Detail

Net Loss per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Numerator:	'	'	'	'
Net income	$4,433	$4,713	$2,777	$1,645
Net income allocable to preferred stockholders	0	-2,279	0	-1,362
Net income attributable to common stockholders	$4,433	$2,434	$2,777	$283
Denominator:	'	'	'	'
Weighted average common shares outstanding	32,394	19,759	32,165	8,455
Less: weighted average unvested shares of common stock subject to repurchase	0	11	2	13
Weighted average common shares used in computing basic and diluted net loss per share	32,394	19,748	32,163	8,442
Weighted average effect of potentially dilutive securities:	'	'	'	'
Stock options	3,408	4,601	3,573	4,248
Common stock warrants	2	2	2	2
Weighted average common shares used in computing diluted net income per share	35,804	24,351	35,738	12,692
Net income per share attributable to common stockholders:	'	'	'	'
Basic	$0.14	$0.12	$0.09	$0.03
Diluted	$0.12	$0.10	$0.08	$0.02
Historical outstanding anti-dilutive securities not included in diluted net loss per share calculation:	'	'	'	'
Common stock options	3,612	663	3,666	7,492

Inventories_Detail

Inventories (Detail) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Raw materials	$19,938	$20,986
Work in progress	22,985	15,494
Finished goods	9,388	20,537
Net inventories	$52,311	$57,017

Certain_Financial_Statement_In2

Certain Financial Statement Information - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'	'	'	'
Inventory Adjustments	$1,374	'	$1,374	'	'
Inventories held by third parties	6,361	'	6,361	'	13,616
Depreciation and amortization expense	$1,721	$1,183	$4,825	$3,132	'

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	$53,118	$48,007
Less accumulated depreciation and amortization	-29,760	-25,136
Property and equipment, Net	23,358	22,871
Computer equipment and software	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	6,217	5,171
Computer equipment and software | Minimum	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Useful Life (Years)	'3 years	'
Computer equipment and software | Maximum	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Useful Life (Years)	'5 years	'
Machinery and equipment	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Useful Life (Years)	'5 years	'
Property and equipment, Gross	39,503	33,753
Office furniture and equipment	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Useful Life (Years)	'7 years	'
Property and equipment, Gross	1,081	775
Leasehold improvements	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	5,137	4,477
Construction in progress	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	$1,180	$3,831

Accrued_Liabilities_Detail

Accrued Liabilities (Detail) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Accrued inventory purchases	$1,123	$1,125
Accrued inventory repurchase obligation	4,728	6,900
Accrued other	3,300	4,647
Accrued liabilities	$9,151	$12,672

Cash_and_Marketable_Securities

Cash and Marketable Securities' Cost, Unrealized Gains, Unrealized Losses and Fair Value by Significant Investment (Detail) (USD $)	Sep. 28, 2013	Dec. 29, 2012	Sep. 29, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cash and cash equivalents	$17,206	$44,106	$58,007	$12,119
Short-term marketable securities	23,213	30,361	'	'
Long-term marketable securities	22,664	18,892	'	'
Fair Value, Measurements, Recurring	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	63,085	93,354	'	'
Unrealized Gains	18	14	'	'
Unrealized Losses	-20	-9	'	'
Fair Value	63,083	93,359	'	'
Cash and cash equivalents	17,206	44,106	'	'
Short-term marketable securities	23,213	30,361	'	'
Long-term marketable securities	22,664	18,892	'	'
Fair Value, Measurements, Recurring | Cash	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	5,971	24,703	'	'
Fair Value	5,971	24,703	'	'
Cash and cash equivalents	5,971	24,703	'	'
Level 1 | Fair Value, Measurements, Recurring	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	10,234	18,923	'	'
Fair Value	10,234	18,923	'	'
Cash and cash equivalents	10,234	18,923	'	'
Level 1 | Fair Value, Measurements, Recurring | Money market funds	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	10,234	18,923	'	'
Fair Value	10,234	18,923	'	'
Cash and cash equivalents	10,234	18,923	'	'
Level 2 | Fair Value, Measurements, Recurring	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	46,880	49,728	'	'
Unrealized Gains	18	14	'	'
Unrealized Losses	-20	-9	'	'
Fair Value	46,878	49,733	'	'
Cash and cash equivalents	1,001	480	'	'
Short-term marketable securities	23,213	30,361	'	'
Long-term marketable securities	22,664	18,892	'	'
Level 2 | Fair Value, Measurements, Recurring | U.S. Agency securities	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	23,562	24,339	'	'
Unrealized Gains	7	2	'	'
Unrealized Losses	-1	-2	'	'
Fair Value	23,568	24,339	'	'
Short-term marketable securities	11,564	13,317	'	'
Long-term marketable securities	12,004	11,022	'	'
Level 2 | Fair Value, Measurements, Recurring | Certificates of deposit	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	8,120	9,285	'	'
Unrealized Gains	4	2	'	'
Unrealized Losses	-14	-3	'	'
Fair Value	8,110	9,284	'	'
Cash and cash equivalents	1,001	480	'	'
Short-term marketable securities	5,479	6,642	'	'
Long-term marketable securities	2,631	2,162	'	'
Level 2 | Fair Value, Measurements, Recurring | Commercial paper	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	1,001	2,893	'	'
Unrealized Gains	0	1	'	'
Unrealized Losses	0	'	'	'
Fair Value	1,001	2,894	'	'
Short-term marketable securities	'	2,894	'	'
Level 2 | Fair Value, Measurements, Recurring | Corporate notes and bonds	'	'	'	'
Assets, Fair Value Disclosure [Abstract]	'	'	'	'
Cost	14,197	13,211	'	'
Unrealized Gains	7	9	'	'
Unrealized Losses	-5	-4	'	'
Fair Value	14,199	13,216	'	'
Short-term marketable securities	6,170	7,508	'	'
Long-term marketable securities	$8,029	$5,708	'	'

Financial_Instruments_Addition

Financial Instruments - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 28, 2013	Sep. 28, 2013	Sep. 28, 2013	Dec. 29, 2012
	Investment	Minimum	Maximum	Fair Value, Measurements, Recurring	Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]	'	'	'	'	'
Transfers between Level 1, Level 2 and Level 3 Securities	$0	'	'	'	'
Long term marketable securities maturity period	'	'1 year	'2 years	'	'
Number of investments in marketable securities under unrealized loss position	32	'	'	'	'
Fair value of Investments in marketable securities in unrealized loss position for less than 12 months	15,821	'	'	'	'
Availableforsale Securities Gross Unrealized Losses 2	'	'	'	$20	$9

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (Nonqualified stock options)	3 Months Ended	9 Months Ended
	Sep. 28, 2013	Sep. 28, 2013
Nonqualified stock options	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Non-qualified stock options granted	246,000	1,806,000

Fair_Value_of_Stock_Options_Es

Fair Value of Stock Options Estimated at Grant Date (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'	'
Weighted-average expected term (years)	'5 years	'5 years	'5 years	'5 years
Risk-free interest rate	1.38%	0.66%	0.78%	0.73%
Dividend rate	'	'	'	'
Volatility	60.00%	63.00%	61.00%	63.00%
Forfeiture rate	4.00%	3.00%	3.00%	3.00%
Estimated weighted-average fair value per stock option	$5.35	$8.89	$5.16	$8.13

StockBased_Compensation_Expens

Stock-Based Compensation Expense Recognized (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation expense	$1,728	$1,152	$4,854	$3,116
Cost of net revenue	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation expense	238	133	652	404
Research and development	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation expense	537	368	1,534	935
Selling, general and administrative	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation expense	$953	$651	$2,668	$1,777

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax benefit	$95	$308	$7	$234

Supply_and_Prepayment_Agreemen1

Supply and Prepayment Agreement - Additional Information (Detail) (USD $)	3 Months Ended		5 Months Ended	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012	Jul. 31, 2012	Sep. 28, 2013	Dec. 29, 2012
Payables and Accruals [Abstract]	'	'	'	'	'
Initial term of agreement	'	'18 months	'	'	'
Proceeds to be prepaid	$13,000	'	$14,000	'	'
Deposits repaid under supply and prepayment agreement	'	'	'	8,046	'
Customer deposits	'	'	'	4,954	'
Balance received as prepayments on purchase orders from Macnica	'	'	'	'	11,425
Deposits paid to suppliers for support production levels	'	'	'	'	4,000
Deposit repayments from suppliers	'	'	'	3,058	'
Remaining deposit to be collected	'	'	'	$942	'