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Schedule of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts Receivable [Line Items] |  |
Total accounts receivable, net | $ 9,823 | $ 4,739
Allowance for doubtful accounts | (800) |
Commercial product sales |  |
Accounts Receivable [Line Items] |  |
Accounts receivable, gross | 8,656 | 7,939
Wholesaler distribution fees and prompt pay discounts | (1,201) | (1,696)
Reserve for returns | (3,089) | (2,797)
Total accounts receivable, net | 4,366 | 3,446
Collaborations and services |  |
Accounts Receivable [Line Items] |  |
Accounts receivable, gross | 6,224 | 2,060
Total accounts receivable, net | 5,457 | 1,293
Allowance for doubtful accounts | $ (767) | $ (767)

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