Income Taxes - Difference by Applying the Statutory Federal Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
(Benefit) provision computed at statutory rate	$ (848)	$ 2,873	$ 3,620
Increase (reduction) resulting from:
Difference in rates for foreign jurisdictions	(65)
Tax exempt interest income	(6)	(23)	(15)
Stock-based compensation	271	526	992
Other non-deductible expenses	116	151	169
Non-deductible officers compensation	113
State income tax provision	(228)	391	596
Valuation allowance	100	231	149
True-up of prior year returns	(154)
Penalties and interest	15
Other	29	36	144
(Benefit from) provision for income taxes	$ (657)	$ 4,185	$ 5,655