Schedule of Accounts Receivable, Net (Detail) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Accounts Receivable [Line Items]
Total accounts receivable, net	$ 19,714,000	$ 16,801,000
Allowance for credit losses	0	0
Commercial product sales
Accounts Receivable [Line Items]
Accounts receivable, gross	18,405,000	19,359,000
Wholesaler distribution fees and prompt pay discounts	(2,338,000)	(2,536,000)
Reserve for returns	(4,111,000)	(4,108,000)
Total accounts receivable, net	11,956,000	12,715,000
Collaborations and services
Accounts Receivable [Line Items]
Total accounts receivable, net	$ 7,758,000	$ 4,086,000