Schedule of Accounts Receivable, Net (Detail) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Accounts Receivable [Line Items]
Allowance for credit losses	$ 0	$ 0
Total accounts receivable, net	23,346,000	14,901,000
Commercial product sales
Accounts Receivable [Line Items]
Accounts receivable, gross	22,270,000	20,199,000
Wholesaler distribution fees and prompt pay discounts	(3,750,000)	(2,469,000)
Reserve for returns	(6,798,000)	(6,215,000)
Allowance for credit losses	(157,000)	(157,000)
Total accounts receivable, net	11,565,000	11,358,000
Collaborations and services
Accounts Receivable [Line Items]
Total accounts receivable, net	$ 11,781,000	$ 3,543,000