Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accrued Liabilities Current [Abstract]
Accrued wages and benefits	$ 7,798	$ 6,720
Accrued selling fees, rebates, and royalties	4,388	9,046
Accrued operating expenses	3,804	3,222
Accrued construction costs	3,421	4,104
Accrued inventory purchases	2,397	3,714
Accrued clinical expenses	2,073	2,949
Accrued tax withholdings	1,863	1,948
Accrued costs for product launch	1,415	1,474
Deferred revenue	1,289	1,147
Accrued R&D licensing fees	266	366
Accrued interest		3,583
Total accrued expenses	$ 28,714	$ 38,273