Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investments, Owned, Federal Income Tax Note [Line Items]
Decrease in current deferred tax assets	$ 1,300,000
Decrease in noncurrent deferred tax liabilities	$ 1,300,000
Valuation allowance		$ 52,286,000	$ 27,151,000
Income tax (expense) benefit			254,000
Investment tax credits and research and development credits scheduled to expire		2017
Liability for uncertain tax positions		$ 2,600,000
Amount of unrecognized or expected tax benefits recorded in financial statement		1,100,000	1,100,000
Penalties related to income taxes		0	0	$ 0
Unrecognized potential tax benefits		$ 1,000,000
Number of period for which income tax is exempted		5 years
Decreased foreign taxes		$ 147,000	$ 335,000	$ 651,000
Benefit of tax holiday on net income per share (diluted)		$ 0.01	$ 0.01	$ 0.03
Tax holiday additional renewal period		5 years
Cumulative undistributed earnings of foreign subsidiaries		$ 11,000,000
Federal [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction		$ 143,500,000
Operating loss carry forwards expiration year		2021
Tax credit carry forward amount		$ 525,000
Deferred tax asset		21,700,000
State and Local Jurisdiction [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction		$ 174,800,000
Operating loss carry forwards expiration year		2019
Deferred tax asset		$ 26,400,000
Research [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Tax credit carry forward amount		173,000
Investment Credit [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Tax credit carry forward amount		$ 68,600
Malaysia [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Number of period for which income tax is exempted		5 years