Schedule of Accounts Receivable, Net (Detail) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable [Line Items]
Total accounts receivable, net	$ 14,901,000	$ 16,801,000
Allowance for credit losses	0
Commercial product sales
Accounts Receivable [Line Items]
Accounts receivable, gross	20,199,000	19,359,000
Wholesaler distribution fees and prompt pay discounts	(2,469,000)	(2,536,000)
Reserve for returns	(6,215,000)	(4,108,000)
Total accounts receivable, net	11,358,000	12,715,000
Allowance for credit losses	(157,000)
Collaborations and services
Accounts Receivable [Line Items]
Total accounts receivable, net	$ 3,543,000	$ 4,086,000