Fair Value - Summary of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Assets measured at fair value
Cash and cash equivalents	$ 13,086	$ 24,165
Restricted cash	10,432	10,425
Total Assets measured at fair value	23,518	34,590
Liabilities measured at fair value
Contingent consideration	18,800	22,800
Total liabilities measured at fair value	18,800	22,800
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets measured at fair value
Cash and cash equivalents	13,086	24,165
Restricted cash	10,432	10,425
Total Assets measured at fair value	23,518	34,590
Significant Unobservable Inputs (Level 3) [Member]
Liabilities measured at fair value
Contingent consideration	18,800	22,800
Total liabilities measured at fair value	$ 18,800	$ 22,800