Fair Value - Summary of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Assets measured at fair value
Cash and cash equivalents	$ 29,741	$ 24,165
Restricted cash	6,419	10,425
Total Assets measured at fair value	36,160	34,590
Liabilities measured at fair value
Contingent consideration	18,026	22,800
Warrant liabilities	11,041
Total liabilities measured at fair value	29,067	22,800
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets measured at fair value
Cash and cash equivalents	29,741	24,165
Restricted cash	6,419	10,425
Total Assets measured at fair value	36,160	34,590
Significant Unobservable Inputs (Level 3) [Member]
Liabilities measured at fair value
Contingent consideration	18,026	22,800
Warrant liabilities	11,041
Total liabilities measured at fair value	$ 29,067	$ 22,800