Product Revenue Net - Schedule Of Each Customer As a Percentage Of Net Product Revenue (Detail) - Net Product Revenue [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Customer 1 [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	37.00%	31.00%	40.00%	36.00%
Customer 2 [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%	8.00%	10.00%	11.00%
Customer 3 [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	46.00%	17.00%	37.00%
Customer 4 [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	14.00%	21.00%	16.00%
Customer 5 [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	0.00%	11.00%	0.00%