Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments, Owned, Federal Income Tax Note [Line Items]
Valuation allowance	$ 9,547,000
Net operation loss deduction	100,000
Investment tax credits and research and development credits scheduled to expire	2017
State net operating loss-net of tax	16,206,000	4,537,000
Penalties related to income taxes	0	0	11,000
Unrecognized potential tax benefits	1,000,000
Number of period for which income tax is exempted	10 years
Decreased foreign taxes	651,000	1,300,000	535,000
Benefit of tax holiday on net income per share (diluted)	$ 0.03	$ 0.06	$ 0.02
Cumulative undistributed earnings of foreign subsidiaries	11,100,000
Malaysia [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Number of period for which income tax is exempted	10 years
Domestic Tax Authority [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction	72,500,000
Operating loss carry forwards expiration year	2026
Stock option exercises for federal purposes	21,800,000
State and Local Jurisdiction [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction	97,300,000
Operating loss carry forwards expiration year	2019
State net operating loss-net of tax	26,200,000
Investment Credit [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction	155,000
Research [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Net operation loss deduction	$ 54,000