Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Benefit [Line Items]
Income tax benefit	$ (30,089,000)	$ 401,000	$ 843,000
Gross deferred tax assets	31,872,000	37,859,000
Pre-tax income	8,200,000
Pretax income period	3 years
Statutory federal tax rate to income (loss) from continuing operations	34.00%
Excess tax deductions from stock option exercises	345,000
Accrued interest and penalties	320,000	316,000
Tax benefit unrecognized	108,000
Expire in 2030 [Member]
Income Tax Benefit [Line Items]
Net operating loss carryforwards	15,700,000
Foreign tax credits	2,100,000
Expire in 2020 [Member]
Income Tax Benefit [Line Items]
Net operating loss carryforwards	13,700,000
Foreign tax credits	1,000,000
Expire in 2033 [Member]
Income Tax Benefit [Line Items]
Net operating loss carryforwards	$ 1,300,000