Silicon Image (SIMG) 10-Q 8 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 31, 2014
Document Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'SIMG	'
Entity Registrant Name	'SILICON IMAGE INC	'
Entity Central Index Key	'0001003214	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	78,239,599

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$93,348	$82,220
Short-term investments	47,367	56,003
Accounts receivable, net of allowances for doubtful accounts of $468 at June 30, 2014 and $531 at December 31, 2013	25,963	34,729
Inventories	23,710	11,727
Prepaid expenses and other current assets	5,775	7,733
Deferred income taxes	631	191
Total current assets	196,794	192,603
Property and equipment, net	14,369	14,676
Deferred income taxes, non-current (Note 11)	0	4,368
Intangible assets, net (Note 7)	18,250	10,348
Goodwill	30,458	21,646
Other assets	6,354	8,498
Total assets	266,225	252,139
Current Liabilities:	'	'
Accounts payable	16,580	12,894
Accrued and other current liabilities	26,828	20,622
Deferred margin on sales to distributors	11,086	9,634
Deferred license revenue	1,889	2,742
Total current liabilities	56,383	45,892
Other long-term liabilities	13,650	16,522
Total liabilities	70,033	62,414
Commitments and contingencies (Note 9)	'	'
Stockholders’ Equity:	'	'
Convertible preferred stock, par value $0.001; 5,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, par value $0.001; 150,000,000 shares authorized; shares issued and outstanding: 78,054,587 shares at June 30, 2014 and 77,418,247 shares at December 31, 2013	101	100
Additional paid-in capital	545,857	536,935
Treasury stock, 27,930,115 shares at June 30, 2014 and 27,323,067 shares at December 31, 2013	-161,249	-157,898
Accumulated deficit	-188,328	-189,302
Accumulated other comprehensive income	-189	-110
Total stockholders’ equity	196,192	189,725
Total liabilities and stockholders’ equity	$266,225	$252,139

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowances for doubtful accounts	$468	$531
Convertible preferred stock, par value (in dollars per share)	$0.00	$0.00
Convertible preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Convertible preferred stock, shares issued (in shares)	0	0
Convertible preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	78,054,587	77,418,247
Common stock, shares outstanding (in shares)	78,054,587	77,418,247
Treasury stock, shares issue (in shares)	27,930,115	27,323,067

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue:	'		'		'		'
Product	$50,938		$63,681		$97,704		$114,022
Licensing and services	8,598		9,998		23,393		21,696
Total revenue	59,536		73,679		121,097		135,718
Cost of revenue and operating expenses:	'		'		'		'
Cost of product revenue	24,814	[1],[2]	31,023	[1],[2]	49,609	[1],[2]	56,821	[1],[2]
Cost of licensing and services revenue	0		162		20		429
Research and development	17,416	[3]	20,225	[3]	34,373	[3]	38,783	[3]
Selling, general and administrative	15,166	[4]	16,097	[4]	32,031	[4]	32,499	[4]
Amortization of acquisition-related intangible assets	510		230		718		481
Restructuring expense (recoveries)	113	[5]	0	[5]	242	[5]	-7	[5]
Total cost of revenue and operating expenses	58,019		67,737		116,993		129,006
Income from operations	1,517		5,942		4,104		6,712
Proceeds from legal settlement	0		1,275		0		1,275
Other than temporary impairment of a privately held company investment	0		1,500		0		1,500
Interest income and other, net	1,043		500		1,061		891
Income before provision for income taxes and equity in net loss of an unconsolidated affiliate	2,560		6,217		5,165		7,378
Income tax expense	1,487		1,888		4,041		3,630
Equity in net loss of an unconsolidated affiliate	0		136		150		259
Net income	$1,073		$4,193		$974		$3,489
Net income per share - basic (in dollars per share)	$0.01		$0.05		$0.01		$0.05
Net income per share - diluted (in dollars per share)	$0.01		$0.05		$0.01		$0.04
Weighted average shares - basic (shares)	78,150		77,245		78,004		76,934
Weighted average shares - diluted (shares)	79,988		78,713		80,110		78,353
[1]	Includes stock-based compensation expense of $148 and $153 for the three months ended June 30, 2014 and 2013, respectively and of $321 and $288 for the six months ended June 30, 2014 and 2013, respectively.
[2]	Includes Amortization of acquisition-related intangible assets of $225 and $250 for the three months ended June 30, 2014 and 2013, respectively and of $450 and $500 for the six months ended June 30, 2014 and 2013, respectively.
[3]	Includes stock-based compensation expense of $792 and $827 for the three months ended June 30, 2014 and 2013, respectively and of $1,705 and $1,845 for the six months ended June 30, 2014 and 2013, respectively.
[4]	Includes stock-based compensation expense of $1,344 and $1,438 for the three months ended June 30, 2014 and 2013, respectively and of $3,295 and $3,209 for the six months ended June 30, 2014 and 2013.
[5]	Includes stock-based compensation expense of $44 and $0 for the three months ended June 30, 2014 and 2013, respectively and of $74 and $0 for the six months ended June 30, 2014 and 2013, respectively.

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Amortization of intangible assets	$1,050	$682	$1,798	$1,384
Cost of product revenue	'	'	'	'
Amortization of intangible assets	225	250	450	500
Stock-based compensation expense	148	153	321	288
Research and development	'	'	'	'
Amortization of intangible assets	315	202	630	403
Stock-based compensation expense	792	827	1,705	1,845
Selling, general and administrative	'	'	'	'
Stock-based compensation expense	1,344	1,438	3,295	3,209
Restructuring Charges [Member]	'	'	'	'
Stock-based compensation expense	$44	$0	$74	$0

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$1,073	$4,193	$974	$3,489
Components of accumulated other comprehensive loss, net of zero tax:	'	'	'	'
Foreign currency translation adjustments	-53	54	-92	31
Fair value of effective cash flow hedges	0	0	0	0
Unrealized gains (losses) on short-term investments :	'	'	'	'
Unrealized gain (loss) arising during the period	6	-170	14	-293
Reclassification adjustment for gains included in net income	0	-133	0	-142
Total unrealized gain (loss) on short-term investments	6	-303	14	-435
Other comprehensive loss	-47	-249	-78	-404
Comprehensive income	$1,026	$3,944	$896	$3,085

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$974,000	$3,489,000
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Depreciation	3,106,000	3,127,000
Stock-based compensation expense	5,395,000	5,342,000
Amortization of investment premium	487,000	578,000
Tax benefits from employee stock-based transactions	76,000	182,000
Other than temporary impairment of a privately held company investment	0	1,500,000
Amortization of intangible assets	1,798,000	1,384,000
Non-operating proceeds from legal settlement	0	-1,275,000
Gain from business acquisition	-361,000	0
Deferred income taxes	-440,000	0
Excess tax benefits from employee stock-based transactions	-76,000	-182,000
Realized gain on sale of short-term investments	0	-143,000
Equity in net loss of an unconsolidated affiliate	150,000	259,000
Others	-21,000	283,000
Changes in assets and liabilities:	'	'
Accounts receivable	9,108,000	10,421,000
Inventories	-11,983,000	-4,734,000
Prepaid expenses and other assets	1,927,000	1,418,000
Accounts payable	3,823,000	4,536,000
Accrued and other liabilities	5,673,000	-2,316,000
Deferred margin on sales to distributors	1,452,000	3,067,000
Deferred license revenue	-1,958,000	41,000
Cash provided by operating activities	19,130,000	26,977,000
Cash flows from investing activities:	'	'
Proceeds from sales of short-term investments	13,796,000	48,330,000
Purchases of short-term investments	-5,798,000	-26,588,000
Cash used in business acquisition, net of cash acquired	-13,464,000	0
Purchases of property and equipment	-2,797,000	-2,466,000
Proceeds from legal settlement	0	1,275,000
Investment in privately held companies	0	500,000
Cash paid for assets purchased from a privately-held company	0	-300,000
Purchase of intellectual properties	0	-1,513,000
Cash provided by (used in) investing activities	-8,263,000	18,238,000
Cash flows from financing activities:	'	'
Proceeds from employee stock program	3,453,000	3,090,000
Excess tax benefits from employee stock-based transactions	76,000	182,000
Repurchases of restricted stock units for income tax withholding	-974,000	-1,332,000
Payment to acquire treasury shares	-2,377,000	0
Cash paid to settle contingent consideration liabilities	-18,000	-45,000
Cash provided by financing activities	160,000	1,895,000
Effect of exchange rate changes on cash and cash equivalents	101,000	-233,000
Net increase in cash and cash equivalents	11,128,000	46,877,000
Cash and cash equivalents — beginning of period	82,220,000	29,069,000
Cash and cash equivalents — end of period	93,348,000	75,946,000
Supplemental cash flow information:	'	'
Cash payment for income taxes	-3,710,000	-2,705,000
Restricted stock units vested	2,936,000	3,902,000
Property and equipment and other assets purchased but not paid for	603,000	688,000
Unrealized gain (loss) on short-term investments	$13,000	($435,000)

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
BASIS OF PRESENTATION	'
	BASIS OF PRESENTATION
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements of Silicon Image, Inc. (the “Company”, “Silicon Image”, “we” or “our”) have been prepared on a basis consistent with our December 31, 2013 audited financial statements and include all adjustments, consisting of normal recurring adjustments, necessary to fairly state the condensed consolidated balance sheets of Silicon Image and our subsidiaries as of June 30, 2014 and December 31, 2013 and the related condensed consolidated statements of operations for the three and six months ended June 30, 2014 and 2013, condensed consolidated statements of comprehensive income for the three and six months ended June 30, 2014 and 2013, and the related condensed consolidated statements of cash flows for the six months ended June 30, 2014 and 2013. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2013. Financial results for the three and six months ended June 30, 2014 are not necessarily indicative of future financial results.
	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles requires the Company to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Areas where significant judgment and estimates are applied include revenue recognition, stock-based compensation, valuation, impairment and fair value hierarchy of short-term investments, inventory reserves, impairment of goodwill and long-lived assets, income taxes, deferred tax assets and legal matters. Actual results could differ materially from these estimates.
	Principles of Consolidation
	The condensed consolidated financial statements include the accounts of Silicon Image, Inc. and its subsidiaries after elimination of all intercompany balances and transactions.
	Summary of Significant Accounting Policies
	There have been no changes to the Company’s significant accounting policies during the three and six months ended June 30, 2014 as compared to the significant accounting policies described in the Company’s audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” ("ASU 2014-09").  ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. The new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. This guidance is effective for public entities for interim and annual periods beginning after December 15, 2016. Early adoption is not permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt ASU 2014-09. The Company is currently assessing the potential impact of adopting this new accounting guidance on its consolidated financial statements and footnote disclosures.
	In June 2014, the FASB issued Accounting Standards Update No. 2014-12, "Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide that a Performance Target Could be Achieved after the Requisite Service Period," ("ASU 2014-12"). ASU 2014-12 requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition. As such, the performance target should not be reflected in estimating the grant date fair value of the award. This update further clarifies that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. This guidance is effective for public entities for interim and annual periods beginning after December 15, 2015. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

Net_Income_Per_Share

Net Income Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
NET INCOME PER SHARE	'
	NET INCOME PER SHARE
	Basic net income (loss) per common share is computed by dividing the net income (loss) available to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted income (loss) per common share is computed by dividing net income (loss) available to common stockholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, shares to be purchased under the employee stock purchase plan and unvested RSUs. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per common share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities.
	The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Numerator:
	Net income	$	1,073	$	4,193	$	974	$	3,489
	Denominator:
	Weighted average outstanding shares used to compute basic net income per share	78,150		77,245		78,004		76,934
	Effect of dilutive securities	1,838		1,468		2,106		1,419
	Weighted average outstanding shares used to compute diluted net income per share	79,988		78,713		80,110		78,353
	Net income per share – basic	$	0.01	$	0.05	$	0.01	$	0.05
	Net income per share – diluted	$	0.01	$	0.05	$	0.01	$	0.04
	For the three and six months ended June 30, 2014 approximately 3.3 million and 3.2 million, respectively, common stock equivalents were excluded from the computation of diluted net income per share because their effect would have been anti-dilutive.
	For the three and six months ended June 30, 2013 approximately 4.3 million and 4.5 million, respectively, common stock equivalents were excluded from the computation of diluted net income per share because their effect would have been anti-dilutive.

Balance_Sheet_Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2014
Disclosure of Balance Sheet Components [Abstract]	'
BALANCE SHEET COMPONENTS	'
	BALANCE SHEET COMPONENTS
	The components of inventories, prepaid expenses and other current assets, property and equipment and other assets consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Inventories:
	Raw materials	$	12,638		$	4,862
	Work in process	5,868			2,285
	Finished goods	5,204			4,580
		$	23,710		$	11,727
	Prepaid expenses and other current assets:
	Prepaid software maintenance	$	2,157		$	3,041
	Other prepaid expenses	1,632			1,939
	Other current assets	1,986			2,753
		$	5,775		$	7,733
	Property and equipment:
	Computers and software	$	22,368		$	20,425
	Equipment	34,635			33,942
	Furniture and fixtures	2,656			2,656
		59,659			57,023
	Less: accumulated depreciation	(45,290		)	(42,347		)
	Total property and equipment, net	$	14,369		$	14,676
	Other assets:
	Investment in a privately held company (Note 4)	$	3,500		$	7,011
	Tax receivable, non-current (Note 11)	1,300			—
	Others	1,554			1,487
		$	6,354		$	8,498
	The components of accrued liabilities and other long-term liabilities were as follows (in thousands):
		June 30,			December 31,
		2014			2013
	Accrued and other current liabilities:
	Accrued royalties payable	$	14,683		$	3,587
	Accrued payroll and related expenses	5,745			8,923
	Accrued payables	3,593			4,771
	Accrued restructuring	589			1,591
	Others	2,218			1,750
		$	26,828		$	20,622
	Other long-term liabilities:
	Non-current liability for uncertain tax positions	$	11,676		$	14,145
	Others	1,974			2,377
		$	13,650		$	16,522

Investment

Investment	6 Months Ended
	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
INVESTMENTS	'
	INVESTMENT
	Cost Method Investment in a Privately Held Company
	In February 2012, the Company paid $3.5 million in cash to purchase a minority interest in a privately held company which designs and develops wireless semiconductor chips. This investment is accounted for using the cost method as the Company’s ownership percentage is minor and the Company does not exert significant influence over the investee.
	In July 2014, the privately held company was acquired by another entity and the Company sold its minority interest in connection with the acquisition. The Company expects to record a gain related to this sale of its investment during the third quarter of fiscal year 2014.

Business_Acquisition

Business Acquisition	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Business Acquisition	'
	On May 1, 2014, the Company finalized the acquisition of 79% of the ownership interest not already held in UpdateLogic, Inc. (ULI), a privately held company headquartered in Minneapolis. ULI is a provider of a comprehensive device management system which enables the control, maintenance, and support of internet-connected consumer electronics products including DTVs, Blu-ray Disc players, set-top boxes and gaming consoles. The net cash paid by the Company for the remaining ownership interest in ULI was $13.5 million, net of $0.5 million cash acquired. With the acquisition of ULI, the Company is extending its connectivity portfolio to include IP connectivity solutions for over-the-top applications including Digital Rights Management provisioning, software management and remote support.
	ULI’s results of operations and the estimated fair value of the ULI assets acquired and liabilities assumed were included in the Company’s unaudited consolidated financial statements beginning May 1, 2014. ULI's revenue and net loss for the period May 1, 2014 through June 30, 2014 was approximately $0.2 million and $0.6 million, respectively. Acquisition cost, which were expensed as incurred, were approximately $138,000.
	Immediately prior to this acquisition, the Company held a 21% of the ownership interest in ULI through an equity investment that had been accounted for under the equity method of accounting. The investment balance immediately prior to the completion of the acquisition transaction was $3.4 million, net of cumulative equity method adjustments of $0.6 million. The estimated fair value of this preexisting ownership interest as of the acquisition date was $3.7 million. Estimating this fair value required the use of valuation techniques and entailed consideration of all the relevant factors that might affect the fair value, such as present value factors, estimates of future revenues and costs. The difference of $0.3 million between the carrying value and the fair value of the Company's preexisting ownership interest in ULI as of the acquisition date has been recorded as a gain in the Company’s other income for the quarter ending June 30, 2014.
	The fair value of the purchase price consideration consisted of the following (in thousands):
	Cash	$	14,000
	Fair value of preexisting interest	3,722
	Total purchase price	$	17,722
	Contingent consideration, up to a maximum of $10.8 million, will become due if certain billing levels are met by the acquired business in the first 18 months after acquisition. Management has determined that the fair value of this contingent consideration as of the acquisition date and June 30, 2014 iszero, and as such no amount related to it is included in the determination of purchase consideration.
	Purchase consideration was allocated to the tangible and intangible assets acquired and liabilities assumed on the basis of their respective estimated fair values on the acquisition date. The Company’s allocation of the total purchase price is as follows (in thousands):
		Estimated Fair Value
	Assets acquired:
	Cash	$	536
	Accounts receivable	322
	Other current assets	36
	Property and equipment	8
	Intangible assets	9,700
	Goodwill	8,812
	Total assets acquired	19,414
	Current liabilities assumed:
	Accrued liabilities	(283		)
	Deferred revenue, current	(368		)
	Total current liabilities	(651		)
	Customer deposits	(227		)
	Long-term liabilities	(77		)
	Deferred revenue, non-current	(737		)
	Total liabilities assumed	(1,692		)
	Total purchase price	$	17,722
	The following table presents details of the intangible assets acquired through the acquisition of ULI ($ in thousands):
		Asset Life in Years		Fair Value
	Customer relationships	5		$	7,800
	Developed technology	5		1,900
	Total intangible assets			$	9,700
	The Company does not believe that there is any significant residual value associated with these intangible assets. The Company amortizes the intangible assets straight-line over their estimated useful lives. The estimation of the fair value of the intangible assets required the use of valuation techniques and entailed consideration of all the relevant factors that might affect the fair value, such as present value factors, estimates of future revenues and costs. The purchase price allocation as was based on a preliminary valuation and is subject to revision as more detailed analyzes are completed and additional information about the fair value of assets acquired and liabilities assumed become available, including the finalization of our valuation of identified intangible assets and deferred revenue.
	Goodwill
	Goodwill represents the excess of the purchase price over the fair value of the underlying net tangible and intangible assets. The goodwill recognized in the acquisition of ULI was derived from expected benefits from cost synergies and knowledgeable and experienced workforce who joined the Company after the acquisition. Goodwill will not be amortized, but will instead be tested for impairment annually or more frequently if certain indicators of impairment are present. Goodwill is not expected to be tax deductible for income tax purposes.
	Unaudited Pro Forma Financial Information
	The unaudited pro forma financial information in the table below summarizes the combined results of operations for the Company and ULI as if the merger occurred at the beginning of each of the reporting periods presented. The pro forma financial information for all periods presented also includes the business combination accounting effects resulting from this acquisition including the amortization charges from acquired intangible assets and the stock-based compensation expense recognized for equity awards granted to ULI employees who joined the Company after the acquisition as though the acquisition was completed at the beginning of each reporting period presented. The pro forma financial information as presented below is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of each reporting period presented.
	The unaudited pro forma financial information for the three and six months ended June 30, 2014 combined the historical results of the Company for the three and six months ended June 30, 2014, the historical results of ULI for the three and six months ended June 30, 2014, and the effects of the pro forma adjustments described above.
	The unaudited pro forma financial information for the three and six months ended June 30, 2013 combined the historical results of the Company for the three and six months ended June 30, 2013, the historical results of ULI for the three and six months ended June 30, 2013, and the effects of the pro forma adjustments described above.
		Three Months Ended June 30,						Six Months Ended June 30,
		2014				2013		2014			2013
		(Dollars in thousands except per share amounts)
	Total revenues	$	60,202			$	73,795	$	122,210		$	135,940
	Net income (loss)	$	936			$	3,024	$	(232	)	$	1,102
	Basic net income (loss) per share	$	0.01			$	0.04	$	—		$	0.01
	Diluted net income (loss) per share	$	0.01			$	0.04	$	—		$	0.01
	The pro forma adjustments did not have any impact on the pro forma combined provision for income taxes for the three and six months ended June 30, 2014 and 2013 due to net loss positions and valuation allowances on deferred income tax assets in those periods.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	FAIR VALUE MEASUREMENTS
	The Company’s cash equivalents and short term investments are generally classified within Level 1 or Level 2 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.
	The Company’s Level 1 assets consist of money market fund securities. These instruments are generally classified within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets.
	The Company’s Level 2 assets include certificate of deposits, corporate securities and municipal securities and are valued by using a multi-dimensional relational model, the inputs, when available, are primarily benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications.
	The Company does not have significant Level 3 assets or liabilities.
	The Company measures certain assets, including its cost method investments, at fair value on a nonrecurring basis when they are deemed to be other-than-temporarily impaired. The fair values of these investments are determined based on valuation techniques using the best information available, and may include quoted market prices, market comparables, and discounted cash flow projections. An impairment charge is recorded when the cost of the investment exceeds its fair value and this condition is determined to be other-than-temporary. The Company recorded other-than-temporary impairments of its privately held company investment of $1.5 million in the three and six months ended June 30, 2013. No other-than-temporary impairments related to financial assets required to be measured at fair value recorded in the three and six months ended June 30, 2014.
	For certain of the Company’s financial instruments, including cash held in banks, accounts receivable and accounts payable, the carrying amounts approximate fair value due to their short maturities.
	The following table presents the fair value of our financial instruments that are measured at fair value on a recurring basis as of June 30, 2014 (in thousands):
		Fair value measurements using
		Level 1		Level 2		Level 3		Assets at fair value
	Assets:
	Cash equivalents:
	Money market funds	$	27,104	$	—	$	—	$	27,104
	Short-term investments:
	Certificate of deposits	$	—	$	10,766	$	—	$	10,766
	Municipal securities	—		23,232		—		23,232
	Corporate securities	—		7,274		—		7,274
	United States government agencies	—		6,095		—		6,095
	Total short-term investments	$	—	$	47,367	$	—	$	47,367
	The cash equivalents in the above table exclude $66.2 million in cash held by the Company in its accounts or with investment fund managers as of June 30, 2014.
	The following table presents the fair value of our financial instruments that are measured at fair value on a recurring basis as of December 31, 2013 (in thousands):
		Fair value measurements using
		Level 1		Level 2		Level 3		Assets at fair value
	Assets:
	Cash equivalents:
	Money market funds	$	33,192	$	—	$	—	$	33,192
	Short-term investments:
	Certificate of deposits	$	—	$	10,874	$	—	$	10,874
	Municipal securities	—		31,069		—		31,069
	Corporate securities	—		10,313		—		10,313
	United States government agencies	—		3,747		—		3,747
	Total short-term investments	$	—	$	56,003	$	—	$	56,003
	The cash equivalents in the above table exclude $49.0 million in cash held by the Company in its accounts or with investment fund managers as of December 31, 2013.
	There were no transfers between Level 1, Level 2 and Level 3 fair value hierarchies during the three months ended June 30, 2014.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	INTANGIBLE ASSETS
	Goodwill
	The Company recorded $8.8 million of goodwill as a result of the acquisitions completed during the three and six months ended June 30, 2014. For further discussion, see Note 5.
	The table below summarizes the Company's goodwill activities during the six months ended June 30, 2014 (in thousands):
	Gross amount of goodwill	$	40,856
	Accumulated impairment	(19,210		)
	Additional goodwill from ULI acquisition	8,812
	Carrying value at June 30, 2014	$	30,458
	There were no impairments to goodwill during the three and six months ended June 30, 2014 or 2013.
	Purchased Intangible Assets
	The following table presents the Company’s purchased intangible assets, including those arising from business acquisitions, as of June 30, 2014 (in thousands):
				30-Jun-14
		Useful Life		Gross Carrying				Accumulated				Net Carrying
		(years)		Amount				Amortization				Amount
	Intangible assets with finite lives
	Intellectual Property	6		$	1,600			$	(911	)		$	689
	Core Technology	5		1,600				(1,093		)		507
	System Technology	3		400				(400		)		—
	Developed Technology	5		6,400				(1,789		)		4,611
	Customer Relationships	5-Feb		9,300				(1,375		)		7,925
	Acquisition-related intangible assets			19,300				(5,568		)		13,732
	Licensed Technology	5		5,887				(1,969		)		3,918
	Total intangible assets with finite lives			25,187				(7,537		)		17,650
	Intangible assets with indefinite lives
	Trade Name	indefinite		600				—				600
	Total intangible assets with indefinite lives			600				—				600
	Total purchased intangible assets			$	25,787			$	(7,537	)		$	18,250
	The Company recorded $9.7 million of purchased intangible assets as a result of the acquisitions completed during the three and six months ended June 30, 2014. For further discussion, see Note 5.
	There were no impairment charges with respect to the acquisition-related intangible assets during the three and six months ended June 30, 2014.
	Amortization expense of developed technology is recorded to cost of product revenue. Amortization expense of licensed technology is recorded to research and development. Amortization expense of the remainder of the intangible assets with finite lives is recorded to amortization of acquisition-related intangible assets.
	For intangible assets that are subject to amortization, the Company recorded amortization expense in the condensed consolidated statements of operations as follows (in thousands):
		Three Months Ended June 30,								Six Months Ended June 30,
		2014				2013				2014				2013
	Cost of product revenue	$	225			$	250			$	450			$	500
	Research and development	315				202				630				403
	Amortization of acquisition-related intangible assets	510				230				718				481
		$	1,050			$	682			$	1,798			$	1,384
	The annual expected amortization expense of intangible assets with finite lives is as follows (in thousands):
	Year ending December 31,	Amount
	2014 (remaining 6 months)	$	2,453
	2015	4,887
	2016	4,262
	2017	3,235
	Thereafter	2,813
	Total	$	17,650

Restructuring_Charges

Restructuring Charges	6 Months Ended
	Jun. 30, 2014
Restructuring and Related Activities [Abstract]	'
RESTRUCTURING CHARGES	'
	RESTRUCTURING CHARGES
	For the three and six months ended June 30, 2014, the Company recorded restructuring expense of approximately $113,000 and $242,000, respectively, which primarily consisted of severance and benefits of terminated employees.
	For the three months ended June 30, 2013, the Company did not record any restructuring expense and recorded $(7,000) for the six months ended June 30, 2013 which primarily consisted of the reversal of accrued severance and benefits.
	The table below summarizes the Company’s restructuring activities during the six months ended June 30, 2014 (in thousands):
		Employee
		Severance
		and Benefits
	Accrued restructuring balance as of January 1, 2014	$	1,591
	Additional accruals/adjustments	242
	Cash payments	(1,244		)
	Accrued restructuring balance as of June 30, 2014	$	589
	In December 2013 and June 30, 2014, the Company estimated that the range of probable termination benefit expense related to its restructuring plan was between $1.6 million and $2.6 million. At that time, the Company concluded that no amount within that range was more likely than any other, and therefore determined that the amount of current liability it should record for this plan was $1.6 million. The Company made cash payments of approximately $1.0 million for the six months ended June 30, 2014.
	The $0.6 million outstanding restructuring liability as of June 30, 2014 is expected to be fully paid during the third quarter of fiscal 2014.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	COMMITMENTS AND CONTINGENCIES
	Legal Proceedings
	From time to time the Company has been named as a defendant or has acted as a plaintiff in judicial or administrative proceedings related to its business. Moreover, from time to time, the Company has received notices from licensees of its technology and from adopters of the standards for which the Company serves as agent disputing the payment of royalties and sometimes requesting a refund of royalties allegedly overpaid.
	China National Development and Reform Commission (NDRC) Investigation: In March 2014, the NDRC notified HDMI Licensing, LLC, a wholly-owned affiliate of the Company and the agent for and entity charged with administering the HDMI specification, that the NDRC was investigating HDMI’s licensing activities in China under the Chinese Anti-Monopoly Law (AML). A broad range of remedies with respect to business practices deemed to violate the AML is potentially available to the NDRC, including but not limited to issuing an order to cease conduct deemed illegal, confiscating gains deemed illegally obtained, imposing a fine and requiring modifications to business practices. It is difficult to predict the outcome of this matter or what remedies, if any, may be imposed by the NDRC. The Company continues to cooperate with the NDRC as it conducts its investigation.
	HDMI Licensing, LLC and the Company will continue to defend themselves vigorously in the foregoing matter. However, litigation and administrative proceedings are inherently uncertain. Accordingly, the outcome of this matter cannot be predicted. The Company has not recorded any accrual at June 30, 2014 for contingent losses associated with this matter based on its belief that, at this time, a loss is not probable and any possible range of loss cannot be reasonably estimated. The unfavorable resolution of this matter could have a material adverse effect on the Company’s business, results of operations, financial condition or cash flows. The Company is engaged in numerous other legal actions not described above arising in the ordinary course of its business and, while there can be no assurance, believes that the ultimate outcome of these other legal actions will not have a material adverse effect on its business, results of operations, financial condition or cash flows.
	Indemnifications
	Certain of the Company’s licensing agreements indemnify its customers for any expenses or liabilities resulting from claimed infringements of third party patents, trademarks or copyrights by its products. Certain of these indemnification provisions are perpetual from execution of the agreement and, in some instances the maximum amount of potential future indemnification is not limited. To date, the Company has not paid any such claims or been required to defend any lawsuits with respect to any such claim.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
STOCK-BASED COMPENSATION	'
	STOCK-BASED COMPENSATION
	The Company has a share-based compensation program that provides its Board of Directors with broad discretion in creating equity incentives for employees, officers, non-employees and non-employee board members. This program includes incentive and non-statutory stock option grants and restricted stock units (RSUs) for employees, market-based RSUs and performance-based RSUs for the executive officers and RSUs for non-employee board members pursuant to which such individuals will receive grants immediately following each annual meeting of stockholders. These awards are granted under the stockholder approved 2008 Equity Incentive Plan. Stock option grants under the discretionary grant program generally vest as follows: 25% of the shares vest on the first anniversary of the vesting commencement date and the remaining 75% vest proportionately each month over the next 36 months of continued service. RSU grants generally vest over a one to four-year period. RSU grants to non-employee members of our board vest on the earlier of the first anniversary of the grant date or the date of the Company’s first annual meeting of stockholders following the grant date. Additionally, our Employee Stock Purchase Plan (ESPP) allows employees to purchase shares of common stock at the lower of 85% of the fair market value on the commencement date of the six-month offering period or on the last day of the six-month offering period.
	Valuation and Expense Information under Stock-based Compensation
	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions:
		Three Months Ended June 30,								Six Months Ended June 30,
		2014				2013				2014			2013
	Employee stock option plans:
	Expected life in years	4.1				4				4.1			4
	Expected volatility	55.5		%		60.3		%		55.5		%	61.3		%
	Risk-free interest rate	1.3		%		0.8		%		1.3		%	0.7		%
	Expected dividends	none				none				none			none
	Weighted average fair value	$	2.28			$	2.24			$	2.28		$	2.26
	Employee Stock Purchase Plan:
	Expected life in years	0.5				0.5				0.5			0.5
	Expected volatility	27		%		40.1		%		27		%	40.1		%
	Risk-free interest rate	0.1		%		0.1		%		0.1		%	0.1		%
	Expected dividends	none				none				none			none
	Weighted average fair value	$	1.32			$	1.27			$	1.32		$	1.27
	Amortization method — The value of options and RSUs are amortized to expense, net of estimated forfeitures, on a straight line basis over the vesting period.
	Expected Life — The expected life of the options represents the estimated period of time until exercised and is based on historical experience of similar awards, giving consideration to the contractual terms, vesting schedules, and expectations of future employee behavior. The expected term for the ESPP is based on the term of the purchase period.
	Expected Volatility — The volatility is based on the Company’s historical common stock volatility derived from historical stock price data for historical periods commensurate with the options’ expected life.
	Risk-Free Interest Rate —The risk-free interest rate is based on the implied yield currently available on United States Treasury zero-coupon issues with a term equal to the expected life at the date of grant of the options.
	Expected Dividend — The expected dividend is based on our history and expected dividend payouts. The expected dividend yield is zero as the Company has historically paid no dividends and does not anticipate dividends to be paid in the future.
	There were no shares purchased under the ESPP for the three months ended June 30, 2014 and 2013. For the six months ended June 30, 2014 and 2013, 372,089 and 566,078 shares of common stock, respectively, were purchased under the ESPP. At June 30, 2014, the Company had $167,000 of total unrecognized compensation expense under the ESPP. The unamortized compensation expense will be amortized on a straight-line basis over a remaining period of approximately 1.5 months.
	Stock Option Activity
	The following is a summary of activity under the Company’s stock option plans during the six months ended June 30, 2014, excluding RSUs (in thousands, except weighted average exercise price and contractual term):
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic
					Exercise				Remaining		Value
					Price per				Contractual
					Share				Terms in Years
	At January 1, 2014	6,152			$	5.53
	Granted	136			5.19
	Forfeitures and cancellations	(372	)		6.45
	Exercised	(370	)		4.78
	At June 30, 2014	5,546			$	5.51			4.34		$	3,809
	Vested and expected to vest at June 30, 2014	5,268			$	5.53			4.11		$	3,727
	Exercisable at June 30, 2014	3,776			$	5.68			3.83		$	3,266
	The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value that option holders would have received had all option holders exercised their options on June 30, 2014. The aggregate intrinsic value is the difference between the Company’s closing stock price on the last trading day of the quarter ended June 30, 2014 and the exercise price, multiplied by the number of outstanding or exercisable in-the-money options. The aggregate intrinsic value excludes the effect of stock options that have a zero intrinsic value. The total pre-tax intrinsic value of options exercised, representing the difference between the fair market value of the Company’s common stock on the date of the exercise and the exercise price of each option, for the three and six months ended June 30, 2014 was $46,000 and $576,000, respectively, and $89,000 and $152,000 for the three and six months ended June 30, 2013, respectively.
	At June 30, 2014, the total unrecognized pre-tax stock-based compensation expense related to stock options, which the Company expects to recognize over the remaining weighted-average vesting period of 2.38 years, was $3.1 million, net of estimated forfeitures.
	Restricted Stock Units
	The RSUs that the Company grants to its employees typically vest ratably over a certain period of time, subject to the employee’s continuing service to the Company over that period. RSUs granted to executive officers and non-executive employees typically vest over a four-year period.
	RSUs are converted into shares of the Company’s common stock upon vesting on a one-for-one basis. The cost of the RSUs is determined using the fair value of the Company’s common stock on the date of the grant. Compensation is recognized on a straight-line basis over the requisite service period of each grant adjusted for estimated forfeitures. Each RSU award granted from the Company’s 2008 Equity Incentive Plan will reduce the number of options available for issuance by 1.5 shares.
	A summary of activity with respect to the Company’s RSUs during the six months ended June 30, 2014 is as follows: (in thousands, except weighted-average grant date fair value per share):
		Number of Units			Weighted-Average
					Grant Date Fair
					Value Per Share
	Outstanding at January 1, 2014	3,500			$	5.37
	Granted	518			5.53
	Vested	(501	)		6.38
	Forfeitures and cancellations	(287	)		5.25
	Outstanding at June 30, 2014	3,230			$	5.26
	Of the 3,229,774 RSUs outstanding as of June 30, 2014, approximately 2,582,302 units are expected to vest after considering the applicable forfeiture rate.
	The aggregate fair value of awards that vested during the three and six months ended June 30, 2014 was $1.0 million and $2.9 million, respectively, which represents the market value of Silicon Image common stock on the date that the RSUs vested. The grant date fair value of awards that vested during the three and six months ended June 30, 2014 was $1.0 million and $3.2 million, respectively. The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements.
	In August 2012, the Company granted 331,500 RSUs with market-based vesting criteria to executives and certain key employees pursuant to 2008 Plan. These market-based awards vest over four years with 25% of the total number of shares vesting on each anniversary of the grant date. Whether or not they vest is determined by a comparison of the price of the Company’s common stock and the price set by the Company, which ranged from $4.52 to $5.39 over the vesting period. The grant-date fair value of these awards was $1.2 million, estimated using a Monte Carlo simulation method which takes into account the probability that the market conditions of these awards will be achieved. Compensation costs related to these awards will be recognized over the vesting period regardless of whether the market conditions are satisfied, provided that the requisite service has been provided. As of June 30, 2014, 213,375 shares of the outstanding restricted stock units were market-based restricted stock units.
	In August and September 2013, the Company granted 875,000 RSUs with performance-based vesting criteria to executives. These performance-based awards vest based on the Company’s GAAP earnings per share over the vesting period of 4.3 years.  Each RSU represents the right to receive one share of the Company’s common stock upon the vesting of such RSU, and is subject to the terms of the Company’s 2008 Equity Incentive Plan.  Any RSUs not vesting on a vesting date due to the Company’s GAAP earnings per share for the fiscal year in question not meeting the target for such fiscal year as established by the Compensation Committee shall be forfeited.  The grant date fair value of these awards was $4.7 million. In May 2014, the Company granted 100,000 RSUs with performance-based vesting criteria to one executive who joined the Company through the ULI acquisition. These performance-based awards also vest based on the Company's GAAP earnings per share over the vesting period of 3.6 years. The grant date fair value of these awards was $519,000. As of June 30, 2014, the Company expects the earnings per share targets to be met and thus all of the performance-based RSUs less estimated forfeitures are expected to vest.
	At June 30, 2014, the total unrecognized pre-tax stock-based compensation expense related to non-vested RSUs, which the Company expects to recognize over the remaining weighted-average vesting period of 2.15 years, was $8.7 million, net of estimated forfeitures.
	During the three months ended June 30, 2014 and 2013, the Company repurchased 46,815 and 129,488 shares of stock, respectively, for an aggregate value of $261,000 and $0.7 million, respectively, from the employees upon the vesting of their RSUs that were granted under the Company’s 2008 Equity Incentive Plan to satisfy the employees’ minimum statutory tax withholding requirement. During the six months ended June 30, 2014 and 2013, the Company repurchased 164,348 and 263,703 shares of stock, respectively, for an aggregate value of $1.0 million and $1.3 million, respectively. The Company will continue to repurchase shares of stock from employees as their RSUs vest to satisfy the employees’ minimum statutory tax withholding requirement.
	Stock Repurchase Program
	In April 2012, the Company’s Board of Directors authorized a $50 million stock repurchase program. The repurchases may occur from time to time in the open market or in privately negotiated transactions. The timing and amount of any repurchase of shares will be determined by the Company’s management, based on its evaluation of market conditions, cash on hand and other factors and may be made under a stock repurchase plan. The authorization will stay in effect until the authorized aggregate amount is expended or the authorization is modified by the Board of Directors. The program does not obligate the Company to acquire any particular amount of stock and purchases under the program may be commenced or suspended at any time, or from time to time, without prior notice. Further, the stock repurchase program may be modified, extended or terminated by the Board at any time. In July 2013, the Company’s Board of Directors authorized a new share repurchase plan as a follow-on to its current plan which had $10.3 million remaining for repurchase. At the conclusion of the Company’s existing plan, the Company will commence a new share repurchase plan whereby the Company will be authorized to repurchase its common stock up to an aggregate purchase of $50 million.
	The Company repurchased 440,500 shares of its common stock on the open market at a total cost of approximately $2.4 million with an average price per share of $5.37 during the three months ended June 30, 2014. The Company repurchased 442,700 shares of its common stock on the open market at a total cost of approximately $2.4 million with an average price per share of $5.37 during the six months ended June 30, 2014.

Provision_for_Income_Taxes

Provision for Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Provision for Income Taxes	'
	PROVISION FOR INCOME TAXES
	The Company recorded an income tax expense of $1.5 million and $4.0 million for the three and six months ended June 30, 2014. The effective tax rate for the three and six months ended June 30, 2014 was 58.1% and 78.2%, respectively. The difference between the effective tax rate and the income tax determined by applying the statutory federal income tax rate of 35% was due primarily to foreign withholding taxes associated with licensing revenue.
	The Company continued to maintain a valuation allowance as a result of uncertainties related to the realization of its net deferred tax assets at June 30, 2014. The valuation allowance was established as a result of weighing all positive and negative evidence. The valuation allowance reflects the conclusion of management that it is more likely than not that benefits from certain deferred tax assets will not be realized. If actual results differ from these estimates or these estimates are adjusted in future periods, the valuation allowance may require adjustment which could materially impact the Company’s financial position and results of operations. It is reasonably possible that sometime in the next 12 months positive evidence will be sufficient to release a material amount of our valuation allowance; however there is no assurance that this will occur. The required accounting for the potential release would have significant deferred tax consequences and would increase earnings in the quarter in which the allowance is released.
	The Company recorded an income tax expense of $1.9 million and $3.6 million for the three and six months ended June 30, 2013. The effective tax rates for the three and six months ended June 30, 2013 were 30.4% and 49.2%, respectively. The difference between the effective tax rate and the income tax determined by applying the statutory federal income tax rate of 35% was due primarily to foreign withholding taxes associated with licensing revenue.
	During the first quarter of 2014, the Company adopted ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. ASU 2013-11 provides guidance on the presentation of unrecognized tax benefits. ASU 2013-11 requires presenting an unrecognized tax benefit or a portion of an unrecognized tax benefit as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carry forward, except to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. This accounting standard became effective for the Company on January 1, 2014 and was applied prospectively to unrecognized tax benefits that exist at the effective date. Upon adoption of this guidance, the Company reduced deferred tax assets by $4.4 million, reduced unrecognized tax benefits by $3.1 million and recorded a non-current tax receivable of $1.3 million.
	The Company’s policy is to include interest and penalties related to unrecognized tax benefits within the provision for income taxes. The Company accrued interest and penalties of $12,000 and $24,000 for the three and six months ended June 30, 2014, respectively, and approximately $34,000 and $67,000 for the three and six months ended June 30, 2013, respectively.
	It is possible that the amount of unrecognized tax benefits will change within the next 12 months; however, an estimate of the range of change cannot be made at this time. The Company conducts business globally and, as a result, the Company and its subsidiaries file income tax returns in various jurisdictions throughout the world including with the U.S. federal and various U.S. state jurisdictions as well as with various foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world.

Customers_and_Geographic_Infor

Customers and Geographic Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
CUSTOMERS AND GEOGRAPHIC INFORMATION	'
	CUSTOMERS AND GEOGRAPHIC INFORMATION
	Following the acquisition of ULI (Note 5), the Company operates in two operating segments: product segment and service segment. In the product segment, the Company provides wired and wireless video, audio and data connectivity solutions for the mobile, consumer electronics, personal computer and enterprise markets with offerings including semiconductors, intellectual property and related service offerings. In the service segment, the Company provides a comprehensive device management system which enables the control, maintenance, and support of internet-connected consumer electronics products. The Company’s Chief Executive Officer, who is considered to be the Company’s chief operating decision maker, reviews financial information of these two operating segments separately for purposes of making operating decisions and assessing financial performance. For all periods presented the service segment represents less than 10% of total revenue and income, and thus separate information has not been presented for this operating segment.
	Revenue
	Revenue by geographic area based on bill to locations was as follows (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	United States	$	24,551	$	35,096	$	47,296	$	64,687
	Taiwan	9,340		11,197		20,629		20,830
	Japan	11,163		10,396		20,086		18,647
	Europe	6,309		6,453		14,620		11,950
	China	4,491		6,447		11,651		11,796
	Korea	3,374		3,646		6,040		7,063
	Others	308		444		775		745
	Total revenue	$	59,536	$	73,679	$	121,097	$	135,718
	The Company’s revenue by its primary markets was as follows (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Mobile	$	24,847	$	44,607	$	50,133	$	78,210
	Consumer Electronics	22,640		15,974		40,947		29,641
	Personal Computers	3,451		3,100		6,624		6,171
	Total product revenue	50,938		63,681		97,704		114,022
	Licensing and services	8,598		9,998		23,393		21,696
	Total revenue	$	59,536	$	73,679	$	121,097	$	135,718
	For the three and six months ended June 30, 2014, one customer represented 30.9% and 29.6% of total revenue, respectively. For the three and six months ended June 30, 2013, one customer represented 42.5% and 41.7% of total revenue respectively. There were no other customers representing more than 10% of total revenue during the three and six months ended June 30, 2014 and 2013.
	At June 30, 2014, three customers each represented 16.9%, 15.3% and 12.5% of net accounts receivable. At December 31, 2013, two customers each represented 38.3% and 20.3% of net accounts receivable. The Company’s top five customers, including distributors, generated 64.0% and 60.3% of the Company’s revenue for three and six months ended June 30, 2014, respectively, and 70.5% and 67.4% of the Company's revenue for the three and six months ended June 30, 2013, respectively.
	Property and Equipment
	The table below presents the net book value of the property and equipment by their physical location (in thousands):
		June 30,		December 31,
		2014		2013
	United States	$	7,768	$	7,210
	China	3,807		4,627
	India	1,210		1,410
	Taiwan	1,393		1,216
	Others	191		213
	Net book value	$	14,369	$	14,676

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles requires the Company to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Areas where significant judgment and estimates are applied include revenue recognition, stock-based compensation, valuation, impairment and fair value hierarchy of short-term investments, inventory reserves, impairment of goodwill and long-lived assets, income taxes, deferred tax assets and legal matters. Actual results could differ materially from these estimates.
Principles of Consolidation	'
	Principles of Consolidation
	The condensed consolidated financial statements include the accounts of Silicon Image, Inc. and its subsidiaries after elimination of all intercompany balances and transactions.
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	There have been no changes to the Company’s significant accounting policies during the three and six months ended June 30, 2014 as compared to the significant accounting policies described in the Company’s audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2013.

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Net Income (Loss) Per Share	'
	The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Numerator:
	Net income	$	1,073	$	4,193	$	974	$	3,489
	Denominator:
	Weighted average outstanding shares used to compute basic net income per share	78,150		77,245		78,004		76,934
	Effect of dilutive securities	1,838		1,468		2,106		1,419
	Weighted average outstanding shares used to compute diluted net income per share	79,988		78,713		80,110		78,353
	Net income per share – basic	$	0.01	$	0.05	$	0.01	$	0.05
	Net income per share – diluted	$	0.01	$	0.05	$	0.01	$	0.04

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Balance Sheet Components [Abstract]	'
Current and Non Current Assets	'
	The components of inventories, prepaid expenses and other current assets, property and equipment and other assets consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Inventories:
	Raw materials	$	12,638		$	4,862
	Work in process	5,868			2,285
	Finished goods	5,204			4,580
		$	23,710		$	11,727
	Prepaid expenses and other current assets:
	Prepaid software maintenance	$	2,157		$	3,041
	Other prepaid expenses	1,632			1,939
	Other current assets	1,986			2,753
		$	5,775		$	7,733
	Property and equipment:
	Computers and software	$	22,368		$	20,425
	Equipment	34,635			33,942
	Furniture and fixtures	2,656			2,656
		59,659			57,023
	Less: accumulated depreciation	(45,290		)	(42,347		)
	Total property and equipment, net	$	14,369		$	14,676
	Other assets:
	Investment in a privately held company (Note 4)	$	3,500		$	7,011
	Tax receivable, non-current (Note 11)	1,300			—
	Others	1,554			1,487
		$	6,354		$	8,498
Accrued Liabilities and Other Liabilities	'
	The components of accrued liabilities and other long-term liabilities were as follows (in thousands):
		June 30,			December 31,
		2014			2013
	Accrued and other current liabilities:
	Accrued royalties payable	$	14,683		$	3,587
	Accrued payroll and related expenses	5,745			8,923
	Accrued payables	3,593			4,771
	Accrued restructuring	589			1,591
	Others	2,218			1,750
		$	26,828		$	20,622
	Other long-term liabilities:
	Non-current liability for uncertain tax positions	$	11,676		$	14,145
	Others	1,974			2,377
		$	13,650		$	16,522

Business_Acquisition_Tables

Business Acquisition (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Business Components of Combination, Consideration Transferred	'
	The fair value of the purchase price consideration consisted of the following (in thousands):
	Cash	$	14,000
	Fair value of preexisting interest	3,722
	Total purchase price	$	17,722
Schedule of Business Acquisitions, by Acquisition	'
	urchase consideration was allocated to the tangible and intangible assets acquired and liabilities assumed on the basis of their respective estimated fair values on the acquisition date. The Company’s allocation of the total purchase price is as follows (in thousands):
		Estimated Fair Value
	Assets acquired:
	Cash	$	536
	Accounts receivable	322
	Other current assets	36
	Property and equipment	8
	Intangible assets	9,700
	Goodwill	8,812
	Total assets acquired	19,414
	Current liabilities assumed:
	Accrued liabilities	(283		)
	Deferred revenue, current	(368		)
	Total current liabilities	(651		)
	Customer deposits	(227		)
	Long-term liabilities	(77		)
	Deferred revenue, non-current	(737		)
	Total liabilities assumed	(1,692		)
	Total purchase price	$	17,722
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	'
	The following table presents details of the intangible assets acquired through the acquisition of ULI ($ in thousands):
		Asset Life in Years		Fair Value
	Customer relationships	5		$	7,800
	Developed technology	5		1,900
	Total intangible assets			$	9,700
Business Acquisition, Pro Forma Information	'
	The unaudited pro forma financial information for the three and six months ended June 30, 2013 combined the historical results of the Company for the three and six months ended June 30, 2013, the historical results of ULI for the three and six months ended June 30, 2013, and the effects of the pro forma adjustments described above.
		Three Months Ended June 30,						Six Months Ended June 30,
		2014				2013		2014			2013
		(Dollars in thousands except per share amounts)
	Total revenues	$	60,202			$	73,795	$	122,210		$	135,940
	Net income (loss)	$	936			$	3,024	$	(232	)	$	1,102
	Basic net income (loss) per share	$	0.01			$	0.04	$	—		$	0.01
	Diluted net income (loss) per share	$	0.01			$	0.04	$	—		$	0.01

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on Recurring Basis by Level within Fair Value Hierarchy	'
	The following table presents the fair value of our financial instruments that are measured at fair value on a recurring basis as of December 31, 2013 (in thousands):
		Fair value measurements using
		Level 1		Level 2		Level 3		Assets at fair value
	Assets:
	Cash equivalents:
	Money market funds	$	33,192	$	—	$	—	$	33,192
	Short-term investments:
	Certificate of deposits	$	—	$	10,874	$	—	$	10,874
	Municipal securities	—		31,069		—		31,069
	Corporate securities	—		10,313		—		10,313
	United States government agencies	—		3,747		—		3,747
	Total short-term investments	$	—	$	56,003	$	—	$	56,003
	The following table presents the fair value of our financial instruments that are measured at fair value on a recurring basis as of June 30, 2014 (in thousands):
		Fair value measurements using
		Level 1		Level 2		Level 3		Assets at fair value
	Assets:
	Cash equivalents:
	Money market funds	$	27,104	$	—	$	—	$	27,104
	Short-term investments:
	Certificate of deposits	$	—	$	10,766	$	—	$	10,766
	Municipal securities	—		23,232		—		23,232
	Corporate securities	—		7,274		—		7,274
	United States government agencies	—		6,095		—		6,095
	Total short-term investments	$	—	$	47,367	$	—	$	47,367

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	The table below summarizes the Company's goodwill activities during the six months ended June 30, 2014 (in thousands):
	Gross amount of goodwill	$	40,856
	Accumulated impairment	(19,210		)
	Additional goodwill from ULI acquisition	8,812
	Carrying value at June 30, 2014	$	30,458
Intangible Assets	'
	The following table presents the Company’s purchased intangible assets, including those arising from business acquisitions, as of June 30, 2014 (in thousands):
				30-Jun-14
		Useful Life		Gross Carrying				Accumulated				Net Carrying
		(years)		Amount				Amortization				Amount
	Intangible assets with finite lives
	Intellectual Property	6		$	1,600			$	(911	)		$	689
	Core Technology	5		1,600				(1,093		)		507
	System Technology	3		400				(400		)		—
	Developed Technology	5		6,400				(1,789		)		4,611
	Customer Relationships	5-Feb		9,300				(1,375		)		7,925
	Acquisition-related intangible assets			19,300				(5,568		)		13,732
	Licensed Technology	5		5,887				(1,969		)		3,918
	Total intangible assets with finite lives			25,187				(7,537		)		17,650
	Intangible assets with indefinite lives
	Trade Name	indefinite		600				—				600
	Total intangible assets with indefinite lives			600				—				600
	Total purchased intangible assets			$	25,787			$	(7,537	)		$	18,250
Schedule of Intangible Asset Amortization Expense as Recorded on Statement of Operations	'
	For intangible assets that are subject to amortization, the Company recorded amortization expense in the condensed consolidated statements of operations as follows (in thousands):
		Three Months Ended June 30,								Six Months Ended June 30,
		2014				2013				2014				2013
	Cost of product revenue	$	225			$	250			$	450			$	500
	Research and development	315				202				630				403
	Amortization of acquisition-related intangible assets	510				230				718				481
		$	1,050			$	682			$	1,798			$	1,384
Annual Expected Amortization Expense of Intangible Assets	'
	The annual expected amortization expense of intangible assets with finite lives is as follows (in thousands):
	Year ending December 31,	Amount
	2014 (remaining 6 months)	$	2,453
	2015	4,887
	2016	4,262
	2017	3,235
	Thereafter	2,813
	Total	$	17,650

Restructuring_Charges_Tables

Restructuring Charges (Tables)	6 Months Ended
	Jun. 30, 2014
Restructuring and Related Activities [Abstract]	'
Summary of Restructuring Activities	'
	The table below summarizes the Company’s restructuring activities during the six months ended June 30, 2014 (in thousands):
		Employee
		Severance
		and Benefits
	Accrued restructuring balance as of January 1, 2014	$	1,591
	Additional accruals/adjustments	242
	Cash payments	(1,244		)
	Accrued restructuring balance as of June 30, 2014	$	589

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Option Valuation Model Assumptions	'
	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions:
		Three Months Ended June 30,								Six Months Ended June 30,
		2014				2013				2014			2013
	Employee stock option plans:
	Expected life in years	4.1				4				4.1			4
	Expected volatility	55.5		%		60.3		%		55.5		%	61.3		%
	Risk-free interest rate	1.3		%		0.8		%		1.3		%	0.7		%
	Expected dividends	none				none				none			none
	Weighted average fair value	$	2.28			$	2.24			$	2.28		$	2.26
	Employee Stock Purchase Plan:
	Expected life in years	0.5				0.5				0.5			0.5
	Expected volatility	27		%		40.1		%		27		%	40.1		%
	Risk-free interest rate	0.1		%		0.1		%		0.1		%	0.1		%
	Expected dividends	none				none				none			none
	Weighted average fair value	$	1.32			$	1.27			$	1.32		$	1.27
Stock Option Plans Excluding Restricted Stock Units	'
	The following is a summary of activity under the Company’s stock option plans during the six months ended June 30, 2014, excluding RSUs (in thousands, except weighted average exercise price and contractual term):
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic
					Exercise				Remaining		Value
					Price per				Contractual
					Share				Terms in Years
	At January 1, 2014	6,152			$	5.53
	Granted	136			5.19
	Forfeitures and cancellations	(372	)		6.45
	Exercised	(370	)		4.78
	At June 30, 2014	5,546			$	5.51			4.34		$	3,809
	Vested and expected to vest at June 30, 2014	5,268			$	5.53			4.11		$	3,727
	Exercisable at June 30, 2014	3,776			$	5.68			3.83		$	3,266
Restricted Stock Unit Activity	'
	A summary of activity with respect to the Company’s RSUs during the six months ended June 30, 2014 is as follows: (in thousands, except weighted-average grant date fair value per share):
		Number of Units			Weighted-Average
					Grant Date Fair
					Value Per Share
	Outstanding at January 1, 2014	3,500			$	5.37
	Granted	518			5.53
	Vested	(501	)		6.38
	Forfeitures and cancellations	(287	)		5.25
	Outstanding at June 30, 2014	3,230			$	5.26

Customers_and_Geographic_Infor1

Customers and Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Revenue by Geographic Area Based on Bill to Location	'
	Revenue by geographic area based on bill to locations was as follows (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	United States	$	24,551	$	35,096	$	47,296	$	64,687
	Taiwan	9,340		11,197		20,629		20,830
	Japan	11,163		10,396		20,086		18,647
	Europe	6,309		6,453		14,620		11,950
	China	4,491		6,447		11,651		11,796
	Korea	3,374		3,646		6,040		7,063
	Others	308		444		775		745
	Total revenue	$	59,536	$	73,679	$	121,097	$	135,718
Revenue by its Primary Markets	'
	The Company’s revenue by its primary markets was as follows (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Mobile	$	24,847	$	44,607	$	50,133	$	78,210
	Consumer Electronics	22,640		15,974		40,947		29,641
	Personal Computers	3,451		3,100		6,624		6,171
	Total product revenue	50,938		63,681		97,704		114,022
	Licensing and services	8,598		9,998		23,393		21,696
	Total revenue	$	59,536	$	73,679	$	121,097	$	135,718
Property and Equipment by Physical Location	'
	The table below presents the net book value of the property and equipment by their physical location (in thousands):
		June 30,		December 31,
		2014		2013
	United States	$	7,768	$	7,210
	China	3,807		4,627
	India	1,210		1,410
	Taiwan	1,393		1,216
	Others	191		213
	Net book value	$	14,369	$	14,676

Net_Income_Per_Share_Computati

Net Income Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net income	$1,073	$4,193	$974	$3,489
Weighted average outstanding shares used to compute basic net loss per share (shares)	78,150	77,245	78,004	76,934
Effect of dilutive securities (shares)	1,838	1,468	2,106	1,419
Weighted average outstanding shares used to compute diluted net loss per share (shares)	79,988	78,713	80,110	78,353
Net income per share - basic (in dollars per share)	$0.01	$0.05	$0.01	$0.05
Net income per share - diluted (in dollars per share)	$0.01	$0.05	$0.01	$0.04

Net_Loss_Per_Share_Additional_

Net Loss Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Anti-dilutive common stock equivalents	3.3	4.3	3.2	4.5

Balance_Sheet_Components_Curre

Balance Sheet Components - Current and Non Current Assets (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventories:	'	'
Raw materials	$12,638	$4,862
Work in process	5,868	2,285
Finished goods	5,204	4,580
Inventories	23,710	11,727
Prepaid expenses and other current assets:	'	'
Prepaid software maintenance	2,157	3,041
Other prepaid expenses	1,632	1,939
Other current assets	1,986	2,753
Prepaid expense and other current assets	5,775	7,733
Property and equipment:	'	'
Property and equipment, gross	59,659	57,023
Less: accumulated depreciation	-45,290	-42,347
Total property and equipment, net	14,369	14,676
Other assets:	'	'
Others	1,554	1,487
Other assets	6,354	8,498
Computers and software	'	'
Property and equipment:	'	'
Property and equipment, gross	22,368	20,425
Equipment	'	'
Property and equipment:	'	'
Property and equipment, gross	34,635	33,942
Furniture and fixtures	'	'
Property and equipment:	'	'
Property and equipment, gross	2,656	2,656
Privately-held companies	'	'
Other assets:	'	'
Investment in privately-held companies (Note 4)	3,500	7,011
Tax receivable, non-current (Note 11)	$1,300	$0

Balance_Sheet_Components_Accru

Balance Sheet Components - Accrued Liabilities and Other Liabilities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure of Balance Sheet Components [Abstract]	'	'
Accrued royalties	$14,683	$3,587
Accrued payroll and related expenses	5,745	8,923
Accrued payables	3,593	4,771
Accrued restructuring	589	1,591
Others	2,218	1,750
Total accrued and other current liabilities	26,828	20,622
Non-current liability for uncertain tax positions	11,676	14,145
Others	1,974	2,377
Total other long-term liabilities	$13,650	$16,522

Investment_Additional_Informat

Investment - Additional Information (Detail) (Privately-held companies, USD $)	Feb. 29, 2012
In Millions, unless otherwise specified
Privately-held companies	'
Schedule Of Equity Method Investments [Line Items]	'
Cost method investments	$3.50

Business_Acquisition_Business_

Business Acquisition Business Acquisition - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended	2 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	1-May-14	Jun. 30, 2014	Jun. 30, 2014
					UpdateLogic	UpdateLogic	UpdateLogic
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Ownership interest acquired (as a percent)	'	'	'	'	79.00%	'	'
Cash used in business acquisition, net of cash acquired	'	'	$13,464,000	$0	$13,464,000	'	'
Cash	'	'	'	'	536,000	'	'
Revenues	59,536,000	73,679,000	121,097,000	135,718,000	'	200,000	'
Net income (loss)	1,073,000	4,193,000	974,000	3,489,000	'	-600,000	'
Acquisition related costs	'	'	'	'	'	138,000	'
Equity method investment, ownership percentage	'	'	'	'	21.00%	'	'
Equity method investments	'	'	'	'	3,400,000	'	'
Cumulative equity method investment adjustments	'	'	'	'	600,000	'	'
Fair value of preexisting interest	'	'	'	'	3,722,000	'	'
Remeasurement gain	'	'	'	'	'	'	300,000
Contingent consideration, maximum	'	'	'	'	'	10,800,000	10,800,000
Contingent consideration period	'	'	'	'	'	'18 months	'
Fair value of contingent consideration	'	'	'	'	'	$0	$0

Business_Acquisition_Considera

Business Acquisition - Consideration Transferred (Details) (UpdateLogic, USD $)	0 Months Ended
In Thousands, unless otherwise specified	1-May-14
UpdateLogic	'
Business Acquisition [Line Items]	'
Cash	$14,000
Fair value of preexisting interest	3,722
Total purchase price	$17,722

Business_Acquisition_Assets_Ac

Business Acquisition - Assets Acquired and Liabilities Assumed (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	1-May-14
In Thousands, unless otherwise specified			UpdateLogic
Assets acquired:	'	'	'
Cash	'	'	$536
Accounts receivable	'	'	322
Other current assets	'	'	36
Property and equipment	'	'	8
Intangible assets	'	'	9,700
Goodwill	30,458	21,646	8,812
Total assets acquired	'	'	19,414
Current liabilities assumed:	'	'	'
Accrued liabilities	'	'	-283
Deferred revenue, current	'	'	-368
Total current liabilities	'	'	651
Customer deposits	'	'	-227
Long-term liabilities	'	'	-77
Deferred revenue, non-current	'	'	-737
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	'	'	1,692
Business Combination, Consideration Transferred	'	'	$17,722

Business_Acquisition_FiniteLiv

Business Acquisition - Finite-Lived Intangibles Acquired (Details) (UpdateLogic, USD $)	0 Months Ended	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	1-May-14	Jun. 30, 2014	Jun. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Fair Value	$9,700	$9,700	$9,700
Customer relationships	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Asset Life in Years	'5 years	'	'
Fair Value	7,800	'	'
Developed technology	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Asset Life in Years	'5 years	'	'
Fair Value	$1,900	'	'

Business_Acquisition_Pro_Forma

Business Acquisition - Pro Forma (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Combinations [Abstract]	'	'	'	'
Total revenues	$60,202	$73,795	$122,210	$135,940
Net income (loss)	$936	$3,024	($232)	$1,102
Basic net income (loss) per share	$0.01	$0.04	$0	$0.01
Diluted net income (loss) per share	$0.01	$0.04	$0	$0.01

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis By Level within Fair Value Hierarchy (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	$47,367	$56,003
Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	47,367	56,003
Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	47,367	56,003
Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Money Market Funds | Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Cash equivalents	27,104	33,192
Money Market Funds | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Cash equivalents	27,104	33,192
Money Market Funds | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Cash equivalents	0	0
Money Market Funds | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Cash equivalents	0	0
Certificates of Deposit | Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	10,766	10,874
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	10,766	10,874
Certificates of Deposit | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Municipal Securities | Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	23,232	31,069
Municipal Securities | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Municipal Securities | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	23,232	31,069
Municipal Securities | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Corporate Debt Securities | Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	7,274	10,313
Corporate Debt Securities | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
Corporate Debt Securities | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	7,274	10,313
Corporate Debt Securities | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
United States Government Agencies | Fair Value, Measurements, Recurring	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	6,095	3,747
United States Government Agencies | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	0	0
United States Government Agencies | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	6,095	3,747
United States Government Agencies | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value Assets Measured On Recurring Basis [Line Items]	'	'
Short-term investments	$0	$0

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'	'	'	'
Other-than-temporary impairment, privately-held investment	$1.50	$0	$1.50	'
Cash held by company, accounts or investment fund managers	$66.20	$66.20	'	$49

Intangible_Assets_Intangible_A

Intangible Assets - Intangible Assets (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$25,187	'
Accumulated Amortization	-7,537	'
Net Carrying Amount	17,650	'
Gross Carrying Amount - Indefinite	600	'
Net Carrying Amount - Indefinite	600	'
Total Gross Carrying Amount	25,787	'
Total Net Carrying Amount	18,250	10,348
Acquisition-related intangible assets	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	19,300	'
Accumulated Amortization	-5,568	'
Net Carrying Amount	13,732	'
Intellectual Property	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'6 years	'
Gross Carrying Amount	1,600	'
Accumulated Amortization	-911	'
Net Carrying Amount	689	'
Core Technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'5 years	'
Gross Carrying Amount	1,600	'
Accumulated Amortization	-1,093	'
Net Carrying Amount	507	'
System Technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'3 years	'
Gross Carrying Amount	400	'
Accumulated Amortization	-400	'
Net Carrying Amount	0	'
Developed Technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'5 years	'
Gross Carrying Amount	6,400	'
Accumulated Amortization	-1,789	'
Net Carrying Amount	4,611	'
Customer Relationships	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	9,300	'
Accumulated Amortization	-1,375	'
Net Carrying Amount	7,925	'
Customer Relationships | Minimum	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'2 years	'
Customer Relationships | Maximum	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'5 years	'
Licensed Technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Estimated useful life	'5 years	'
Gross Carrying Amount	5,887	'
Accumulated Amortization	-1,969	'
Net Carrying Amount	3,918	'
Trade Names	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Useful Life (years) - Indefinite	'indefinite	'
Gross Carrying Amount - Indefinite	600	'
Net Carrying Amount - Indefinite	$600	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	1-May-14	Jun. 30, 2014	Jun. 30, 2014
				UpdateLogic	UpdateLogic	UpdateLogic
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'	'
Fair Value	'	'	'	$9,700,000	$9,700,000	$9,700,000
Finite-Lived intangible assets, impairment	0	0	'	'	'	'
Goodwill [Roll Forward]	'	'	'	'	'	'
Gross amount of goodwill	40,856,000	40,856,000	'	'	'	'
Accumulated impairment	-19,210,000	-19,210,000	'	'	'	'
Additional goodwill from ULI acquisition	8,812,000	8,812,000	'	'	'	'
Carrying value at June 30, 2014	$30,458,000	$30,458,000	$21,646,000	$8,812,000	'	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Intangible Asset Amortization Expense as Recorded on the Statement of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Amortization Expense Location On Statement Of Operations [Line Items]	'	'	'	'
Amortization and impairment of acquisition-related intangible assets	$1,050	$682	$1,798	$1,384
Cost of product revenue	'	'	'	'
Amortization Expense Location On Statement Of Operations [Line Items]	'	'	'	'
Amortization and impairment of acquisition-related intangible assets	225	250	450	500
Research and development	'	'	'	'
Amortization Expense Location On Statement Of Operations [Line Items]	'	'	'	'
Amortization and impairment of acquisition-related intangible assets	315	202	630	403
Acquisition-related intangible assets	'	'	'	'
Amortization Expense Location On Statement Of Operations [Line Items]	'	'	'	'
Amortization and impairment of acquisition-related intangible assets	$510	$230	$718	$481

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Annual Expected Amortization Expense of Intangible Assets (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Intangible Assets Disclosure [Abstract]	'
2014 (remaining 6 months)	$2,453
2015	4,887
2016	4,262
2017	3,235
Thereafter	2,813
Net Carrying Amount	$17,650

Restructuring_Charges_Addition

Restructuring Charges - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014
				Employee Severance and Benefits	Employee Severance and Benefits	Minimum	Maximum
						Employee Severance and Benefits	Employee Severance and Benefits
Restructuring Cost And Reserve [Line Items]	'	'	'	'	'	'	'
Cost for the termination of the services	$113,000	($7,000)	$242,000	'	'	'	'
Range of probable termination benefit expense	'	'	'	'	'	1,600,000	2,600,000
Outstanding restructuring liability	1,600,000	'	1,600,000	589,000	1,591,000	'	'
Cash payments	'	'	$1,000,000	$1,244,000	'	'	'

Restructuring_Charges_Summary_

Restructuring Charges - Summary of Restructuring Activities (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Restructuring Cost And Reserve [Line Items]	'
Cash payments	($1,000)
Accrued restructuring balance as of June 30, 2014	1,600
Employee Severance and Benefits	'
Restructuring Cost And Reserve [Line Items]	'
Additional accruals/adjustments	1,591
Additional accruals/adjustments	242
Cash payments	-1,244
Accrued restructuring balance as of June 30, 2014	$589

StockBased_Compensation_Option

Stock-Based Compensation - Option Valuation Model Assumptions (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Stock Option Plans	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected life in years	'4 years 1 month 6 days	'4 years	'4 years 1 month 6 days	'4 years
Expected volatility	55.50%	60.30%	55.50%	61.30%
Risk-free interest rate	1.27%	0.80%	1.27%	0.70%
Weighted average fair value	$2.28	$2.24	$2.28	$2.26
Employee Stock Purchase Plan	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Expected life in years	'6 months	'6 months	'6 months	'6 months
Expected volatility	27.02%	40.10%	27.02%	40.10%
Risk-free interest rate	0.08%	0.10%	0.10%	0.10%
Weighted average fair value	$1.32	$1.27	$1.32	$1.27

StockBased_Compensation_Stock_

Stock-Based Compensation - Stock Option Plans Excluding Restricted Stock Units (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Number of Shares	'
Beginning Balance, shares	6,152
Granted, shares	136
Forfeitures and cancellations, shares	-372
Exercised, shares	-370
Ending balance, shares	5,546
Vested and expected to vest at June 30, 2014	5,268
Exercisable at June 30, 2014	3,776
Weighted Average Exercise Price Per Share	'
Beginning balance, Weighted Average Exercise Price Per Share	$5.53
Weighted Average Exercise Price Per Share, Granted	$5.19
Weighted Average Exercise Price Per Share, Forfeitures and Cancellations	$6.45
Weighted Average Exercise Price Per Share, Exercised	$4.78
Ending balance, Weighted Average Exercise Price Per Share	$5.51
Weighted Average Exercise Price Per Share, Vested and Expected to Vest Ending balance	$5.53
Weighted Average Exercise Price Per Share, Exercisable Ending balance	$5.68
Weighted Average Remaining Contractual Term in Years	'
Beginning balance	'4 years 4 months 2 days
Vested and expected to vest at June 30, 2014	'4 years 1 month 10 days
Exercisable at June 30, 2014	'3 years 9 months 29 days
Aggregate Intrinsic Value	'
Aggregate intrinsic value, Ending balance	$3,809
Aggregate intrinsic value, Vested and expected to vest Ending balance	3,727
Aggregate intrinsic value, Exercisable Ending balance	$3,266

StockBased_Compensation_Restri

Stock-Based Compensation - Restricted Stock Unit Activity (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Number of Units	'
Outstanding Beginning balance	3,500
Granted. shares	518
Vested, shares	-501
Forfeitures and cancellations, shares	-287
Outstanding Ending balance	3,230
Weighted-Average Grant Date Fair Value Per Share	'
Outstanding Beginning balance	$5.37
Granted	$5.53
Vested	$6.38
Forfeitures and cancellations	$5.25
Outstanding Ending balance	$5.26

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)

1 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

1 Months Ended

2 Months Ended

1 Months Ended

6 Months Ended

Jul. 31, 2013

Apr. 30, 2012

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

31-May-14

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Aug. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

31-May-14

Sep. 30, 2013

Aug. 31, 2012

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Stock Options and Awards Activity

Stock Options and Awards Activity

Stock Options and Awards Activity

Stock Options and Awards Activity

Employee Stock Option Plans

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Employee Stock Purchase Plan

Employee Stock Purchase Plan

Performance Based Restricted Stock Units

Performance Based Restricted Stock Units

2008 Equity Incentive Plan

2008 Equity Incentive Plan

2008 Equity Incentive Plan

2008 Equity Incentive Plan

Minimum

Maximum

Restricted Stock Units (RSUs)

Restricted Stock Units (RSUs)

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of vesting upon first anniversary of commencement date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

Remaining portion vesting over the final years of the vesting period.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75.00%

'

'

Final vesting period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'36 months

'

'

Award vesting period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years 7 months 6 days

'4 years 3 months 18 days

'

'

'1 year

'4 years

Employee Stock Purchase Plan discount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

85.00%

'

'

'

Employee Stock Purchase Plan offering period (in months)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'6 months

'

'

'

Shares purchased under Employee Stock Purchase Plan (ESPP) program (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

372,089

566,078

'

'

'

'

'

'

Pre-tax intrinsic value of stock options

'

'

'

'

'

'

'

$46,000

$89,000

$576,000

$152,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Period unamortized compensation expense will be recognized

'

'

'

'4 months 15 days

'

'

'

'

'

'

'

'2 years 4 months 16 days

'

'

'

'2 years 1 month 26 days

'

'1 month 15 days

'

'

'

'

'

'

'

Total unrecognized compensation expense

'

'

'

'

'

'

'

'

'

'

'

3,100,000

'

8,700,000

'

8,700,000

'

200,000

'

'

'

'

'

'

'

Restricted stock units granted to options available for grant reduction coefficient (shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.5

'

'

Number of RSU's outstanding

'

'

3,230,000

3,230,000

'

'

3,500,000

'

'

'

'

'

'

3,229,774

'

3,229,774

'

'

'

'

'

'

'

'

'

Number of RSU's expected to vest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,582,302

'

'

'

'

'

'

'

'

'

Aggregate fair value of awards vested

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

2,900,000

'

'

'

'

'

'

'

'

'

Grant date fair value of options vested

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

3,200,000

'

'

'

'

'

'

'

'

'

Market-based restricted stock units

'

'

213,375

213,375

'

'

'

'

'

'

'

'

331,500

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of shares vesting on each anniversary

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

Exercise price range lower limit

'

'

'

'

'

'

'

'

'

'

'

'

$4.52

'

'

'

'

'

'

'

'

'

'

'

'

Exercise price range higher limit

'

'

'

'

'

'

'

'

'

'

'

'

$5.39

'

'

'

'

'

'

'

'

'

'

'

'

Grant-date fair value

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

4,700,000

'

'

'

'

Performance-based restricted stock units granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

875,000

'

'

'

'

Performance-based restricted stock units granted, fair value

'

'

'

'

'

519,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase of common stock shares

'

'

'

'

'

'

'

'

'

'

'

'

'

46,815

129,488

164,348

263,703

'

'

'

'

'

'

'

'

Repurchase of common stock value

'

'

'

974,000

1,332,000

'

'

'

'

'

'

'

'

300,000

700,000

1,000,000

1,300,000

'

'

'

'

'

'

'

'

Common stock authorized amount

50,000,000

50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining authorized repurchase amount

10,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchased

'

'

440,500

442,700

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchased value

'

'

$2,400,000

$2,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average exercise price per share

'

'

$5.37

$5.37

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Provision_for_Income_Taxes_Add

Provision for Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jan. 02, 2014
						Accounting Standards Update 2013-11 [Member]
Income Tax Disclosure [Abstract]	'	'	'	'	'	'
Income tax expense	$1,487,000	$1,888,000	$4,041,000	$3,630,000	'	'
Effective tax rate	58.10%	30.40%	78.20%	49.20%	'	'
Statutory federal income tax rate	'	'	35.00%	35.00%	'	'
Accrued additional interest related to unrecognized tax benefits	12,000	34,000	24,000	67,000	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'	'	'
Reduction of deferred tax assets	0	'	0	'	-4,368,000	4,400,000
Reduction of unrecognized tax benefits	'	'	'	'	'	3,100,000
Tax receivable, non-current	'	'	'	'	'	$1,300,000

Customers_and_Geographic_Infor2

Customers and Geographic Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Number of reportable segments	'	'	2	'
Number of customers across risk threshold	'	0	5	0
Number of customers on accounts receivable	3	2	3	2
Revenue | Customer Concentration Risk	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Customer risk percentage	30.90%	42.50%	29.60%	41.70%
Top Five Customer	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Customer risk percentage	64.00%	70.50%	60.30%	67.40%
Accounts Receivable | Customer Concentration Risk | Customer A	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Customer risk percentage	'	38.30%	16.90%	'
Accounts Receivable | Customer Concentration Risk | Customer B	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Customer risk percentage	'	20.30%	15.30%	'
Accounts Receivable | Customer Concentration Risk | Customer C	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Customer risk percentage	'	'	12.50%	'

Customers_and_Geographic_Infor3

Customers and Geographic Information - Revenue by Geographic Area Based on Bill to Location (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	$59,536	$73,679	$121,097	$135,718
Billing location | United States	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	24,551	35,096	47,296	64,687
Billing location | Taiwan	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	9,340	11,197	20,629	20,830
Billing location | Japan	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	11,163	10,396	20,086	18,647
Billing location | Europe	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	6,309	6,453	14,620	11,950
Billing location | China	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	4,491	6,447	11,651	11,796
Billing location | Korea	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	3,374	3,646	6,040	7,063
Billing location | Others	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'
Revenue	$308	$444	$775	$745

Customers_and_Geographic_Infor4

Customers and Geographic Information - Revenue by its Primary Markets (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	$59,536	$73,679	$121,097	$135,718
Total Product Revenue	'	'	'	'
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	50,938	63,681	97,704	114,022
Mobile	'	'	'	'
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	24,847	44,607	50,133	78,210
Consumer Electronics	'	'	'	'
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	22,640	15,974	40,947	29,641
Personal Computers	'	'	'	'
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	3,451	3,100	6,624	6,171
Licensing and services	'	'	'	'
Entity Wide Information Revenue From External Customer [Line Items]	'	'	'	'
Revenue	$8,598	$9,998	$23,393	$21,696

Customers_and_Geographic_Infor5

Customers and Geographic Information - Property and Equipment by Physical Location (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	$14,369	$14,676
United States	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	7,768	7,210
China	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	3,807	4,627
INDIA	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	1,210	1,410
Taiwan	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	1,393	1,216
Others	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'
Net book value	$191	$213