Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument, Face Amount	$ 128,250,000				$ 128,250,000
Deferred Tax Liabilities, Deferred Expense, Deferred Financing Costs	10,300,000				$ 10,300,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					35.00%	35.00%	35.00%
World Consolidated Loss Before Tax					$ 16,068,000	$ 21,795,000	$ 23,152,000
Income Tax Benefit					$ 407,000	(24,453,000)	44,741,000
Effective Income Tax Rate Reconciliation, Percent					3.00%
Deferred Tax Assets, Valuation Allowance	64,545,000	$ 75,199,000			$ 64,545,000	75,199,000	38,644,000	$ 34,347,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	3,100,000	300,000	$ 4,200,000	$ 24,500,000	3,100,000
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	15,900,000				15,900,000
Decrease in balance as a result of a lapse of the applicable statues of limitations					900,000	9,500,000	1,300,000
Net interest and penalties reduction related to unrecognized tax benefits					(31,000)	(1,000,000)	(5,600,000)
Gross unrecognized tax benefits including interest and penalties	15,600,000				15,600,000
Accrued potential interest related to unrecognized tax benefits	500,000	500,000			500,000	500,000
Cumulative Undistributed Earnings of non-U.S. subsidiaries intended to be indefinitely reinvested	$ 8,300,000				$ 8,300,000
More Likely Than Not Threshold Recognition of Uncertain Tax Position	50.00%				50.00%
California Franchise Tax Board [Member]
Operating Loss Carryforwards	$ 39,400,000				$ 39,400,000
California Franchise Tax Board [Member] | Net Operating Loss due to Stock Options [Member]
Tax credit carryovers	6,400,000				6,400,000
Domestic Tax Authority [Member]
Deferred Tax Assets, Valuation Allowance		$ 34,000,000				34,000,000
2012 US Federal research tax credit [Member]
Income Tax Benefit							2,400,000
State [Member]
Operating Loss Carryforwards	11,800,000				11,800,000
Tax credit carryovers	31,300,000				$ 31,300,000
Tax credit expiration					will not expire
Foreign [Member]
Operating Loss Carryforwards	81,100,000				$ 81,100,000
Federal [Member]
Operating Loss Carryforwards	11,800,000				11,800,000
Tax credit carryovers	9,200,000				$ 9,200,000
Year that federal tax credits expire					Jan. 01, 2031
Federal [Member] | Net Operating Loss due to Stock Options [Member]
Tax credit carryovers	1,400,000				$ 1,400,000
Federal AMT [Member]
Tax credit carryovers	$ 2,700,000				$ 2,700,000
Tax credit expiration					will not expire
Switzerland [Member]
Tax savings due to reduction in tax rate					$ 700,000	$ 700,000	$ 1,500,000
Increase in diluted earnings per share					$ 0.008	$ 0.008	$ 0.014
Benefits from a tax ruling					The Company’s operations in Switzerland are subject to a reduced tax rate under the Switzerland tax holiday which requires various thresholds of investment and employment in Switzerland.
Additional period for renewal for investment and employment in foreign country					effective through the end of 2018
Minimum [Member] | State [Member]
Operating loss carryforwards, expiration date					Jan. 01, 2016
Maximum [Member] | State [Member]
Operating loss carryforwards, expiration date					Jan. 01, 2035
Valuation Allowance of Deferred Tax Assets [Member] | Domestic Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount						$ 29,000,000
Federal NOL Carryback and R&D Credits [Member] | Domestic Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount						(5,000,000)
Israel Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					$ (900,000)
Tax Year 2010 [Member] | Federal [Member]
Income Tax Benefit						9,000,000
Decrease in balance as a result of a lapse of the applicable statues of limitations						9,000,000
Tax Year 2008 and 2009 [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations							$ 39,000,000
Tax Year 2008 and 2009 [Member] | Federal [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations							39,000,000
Tax Year 2011 [Member] | Federal [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations					500,000
Tax Year 2008 to 2011 [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations					$ 200,000	$ 1,800,000	$ 7,500,000