Current Prepaid Expenses - Summary of Current Prepaid Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred costs	$ 1,600	$ 1,600
Prepaid commissions	1,400	1,400
Other	2,100	1,600
Total	$ 5,121	$ 4,582