Income Taxes - Schedule of Income Taxes Differs from Amount Computed by Applying Statutory U.S. Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax expense at U.S. statutory rate of 34%	$ (4,003)	$ (1,400)	$ 2,063
State income taxes, net of federal benefit	(353)	(195)	466
Effect of foreign subsidiaries	(687)	163	7
Foreign tax credit	(669)
Permanent items in connection with the purchase of Euroscan		219
Permanent items for the fair value adjustment of the Euroscan contingent consideration		(390)
Other	(350)	257	(193)
Change in valuation allowance	7,287	1,754	(1,048)
Income taxes	$ 1,225	$ 408	$ 1,295