Significant Accounting Policies - Summary of Net Product Revenues Earned (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Net product revenues	$ 17,646	$ 15,173	$ 7,556	$ 1,920	$ 42,295	$ 6,019	$ 28,795
Gross product revenues
Disaggregation Of Revenue [Line Items]
Net product revenues					45,668	0	0
Discounts and allowances
Disaggregation Of Revenue [Line Items]
Net product revenues					(6,794)	0	0
Product
Disaggregation Of Revenue [Line Items]
Net product revenues	$ 16,755	$ 14,318	$ 6,735	$ 1,066	$ 38,874	$ 0	$ 0