General and Administrative Expenses - Schedule of General and Administrative Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
General And Administrative Expense [Abstract]
Other expenses	$ 7,613	$ 6,848
Salaries and benefits	7,013	7,296
Stock-based compensation expenses	6,493	7,138
Professional fees	3,577	4,521
Credit loss expenses	742	46
Loss on disposal of property and equipment	83	457
Travel expenses	66	963
Total	$ 25,587	$ 27,269