Segment Reporting - Revenues by Geographic Area, Based on Billing Location of Customer and Long-Lived Assets, by Geographical Areas (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues, net	$ 27,188	$ 26,413
Total long-lived assets, net	21,234		$ 21,817	[1]
United States of America [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues, net	18,740	17,315
Total long-lived assets, net	20,304		20,825
International [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues, net	8,448	$ 9,098
Total long-lived assets, net	$ 930		$ 992

[1] Derived from our audited consolidated financial statements as of December 31, 2015.