Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Adjustments, Settlements, and Unusual Provisions			$ (35,000)	$ (31,000)	$ (1,000,000)
Valuation Allowance Deferred Tax Asset Addition			18,291,000	3,068,000	39,556,000
Valuation Allowance Deferred Tax Asset Deductions			8,356,000	13,722,000	$ 3,001,000
Debt Instrument, Face Amount	$ 128,250,000	$ 128,250,000	$ 128,250,000	$ 128,250,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	35.00%	35.00%
World Consolidated Loss Before Tax			$ 80,430,000	$ 16,068,000	$ 21,795,000
Income Tax Benefit			$ 8,116,000	$ 407,000	(24,453,000)
Effective Income Tax Rate Reconciliation, Percent			10.00%	3.00%
Deferred Tax Assets, Valuation Allowance	74,480,000	64,545,000	$ 74,480,000	$ 64,545,000	75,199,000	$ 38,644,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		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			1,000,000	900,000	9,500,000
Gross unrecognized tax benefits including interest and penalties	19,200,000		19,200,000
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	$ 7,000,000		$ 7,000,000
More Likely Than Not Threshold Recognition of Uncertain Tax Position	50.00%		50.00%
California Franchise Tax Board [Member]
Operating Loss Carryforwards	$ 31,300,000		$ 31,300,000
California Franchise Tax Board [Member] | Net Operating Loss due to Stock Options [Member]
Tax credit carryovers	5,900,000		5,900,000
Domestic Tax Authority [Member]
Deferred Tax Assets, Valuation Allowance					34,000,000
State [Member]
Operating Loss Carryforwards	23,100,000		23,100,000
Tax credit carryovers	32,600,000		$ 32,600,000
Tax credit expiration			will not expire
Foreign [Member]
Operating Loss Carryforwards	103,700,000		$ 103,700,000
Federal [Member]
Operating Loss Carryforwards	23,100,000		23,100,000
Tax credit carryovers	10,000,000		$ 10,000,000
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	$ 700,000
Increase in diluted earnings per share			$ 0.008	$ 0.008	$ 0.008
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, 2017
Maximum [Member] | State [Member]
Operating loss carryforwards, expiration date			Jan. 01, 2036
Valuation Allowance, Stock-based Compensation [Member]
Valuation Allowance Deferred Tax Asset Deductions			$ 8,400,000
Valuation Allowance of Deferred Tax Assets [Member] | Domestic Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					$ 29,000,000
Valuation Allowance, Operating Loss Carryforwards [Member]
Valuation Allowance Deferred Tax Asset Addition	$ 18,300,000
Federal NOL Carryback and R&D Credits [Member] | Domestic Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					(5,000,000)
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 to 2012 [Member] [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations			200,000	$ 200,000	$ 1,800,000
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 2012 [Member] | Federal [Member]
Decrease in balance as a result of a lapse of the applicable statues of limitations			$ 1,100,000