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Revenue - Product Revenue Allowance and Reserves (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Disclosure Of Product Revenue Reserves And Allowances [Line Items] |  |
Beginning balance | $ 3,353 | $ 1,712
Provision related to sales in the current year | 4,817 | 1,891
Adjustments related to prior period sales |  | (172)
Deductions applied and payments made | (3,684) | (1,466)
Ending balance | 4,486 | 1,965
Chargebacks, Discounts and Fees [Member] |  |
Disclosure Of Product Revenue Reserves And Allowances [Line Items] |  |
Beginning balance | 1,153 | 574
Provision related to sales in the current year | 2,674 | 1,041
Adjustments related to prior period sales |  | (50)
Deductions applied and payments made | (1,904) | (809)
Ending balance | 1,923 | 756
Government and Other Rebates [Member] |  |
Disclosure Of Product Revenue Reserves And Allowances [Line Items] |  |
Beginning balance | 1,821 | 535
Provision related to sales in the current year | 2,003 | 679
Adjustments related to prior period sales |  | (22)
Deductions applied and payments made | (1,693) | (473)
Ending balance | 2,131 | 719
Returns [Member] |  |
Disclosure Of Product Revenue Reserves And Allowances [Line Items] |  |
Beginning balance | 379 | 603
Provision related to sales in the current year | 140 | 171
Adjustments related to prior period sales |  | (100)
Deductions applied and payments made | (87) | (184)
Ending balance | $ 432 | $ 490

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