Revenue - Product Revenue Allowance and Reserves (Detail) - USD ($) $ in Thousands	3 Months Ended
	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