Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accrued expenses and other liabilities:
Accrued compensation and benefits	$ 7,444	$ 11,169
Accrued consulting and professional fees	3,640	3,810
Accrued research and development	7,405	8,734
Accrued revenue reserves(2)	40,859	38,450
Accrued other	4,975	3,213
Total accrued expenses and other current liabilities	$ 64,323	$ 65,376