Information about Geographic Areas - Revenue and Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Total revenue:
Total revenue	$ 25,439	$ 26,265
Long-lived assets:
Total long-lived assets	5,705		$ 5,945
North America [Member]
Total revenue:
Total revenue	24,067	23,745
Long-lived assets:
Total long-lived assets	1,123		1,353
Asia [Member]
Total revenue:
Total revenue	275	1,385
Long-lived assets:
Total long-lived assets	258		247
Europe [Member]
Total revenue:
Total revenue	1,097	$ 1,135
Long-lived assets:
Total long-lived assets	$ 4,324		$ 4,345