Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Concentration Risk (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
U.S. Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk	96.00%	96.00%
Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk		97.00%
Customer A | U.S. Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk	34.00%	36.00%
Customer A | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk		37.00%
Customer B | U.S. Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk	35.00%	34.00%
Customer B | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk		48.00%
Customer C | U.S. Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk	27.00%	26.00%
Customer C | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk		12.00%