Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounting Policies [Abstract]
Allowance for doubtful accounts receivable	$ 100
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net product sales	66,402	$ 60,525
U.S.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net product sales	20,853	17,772
Ex-U.S.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net product sales	$ 45,549	$ 42,753