Schedule of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable [Line Items]
Allowance for credit losses	$ (800)
Accounts receivable – other	255
Total accounts receivable, net	4,994	$ 4,218
Commercial product sales
Accounts Receivable [Line Items]
Accounts receivable, gross	7,939	8,090
Wholesaler distribution fees and prompt pay discounts	(1,696)	(1,205)
Reserve for returns	(2,797)	(2,667)
Total accounts receivable, net	3,446	4,218
Collaborations and services
Accounts Receivable [Line Items]
Accounts receivable, gross	2,060
Allowance for credit losses	(767)
Total accounts receivable, net	$ 1,293	$ 4,218