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Term Notes Payable - Pharmakon (Details) - USD ($) $ in Thousands			3 Months Ended
	Feb. 13, 2020	Feb. 06, 2020	Mar. 31, 2021	Mar. 31, 2020
Debt
Interest expense			$ 1,165
Pharmakon Term Notes
Debt
Aggregate principal amount		$ 200,000
Proceeds from term notes	$ 200,000
Margin rate		7.50%
Debt maturity		48 months
Facility fee (as a percent)		2.50%
Facility fee amount		$ 5,000
Debt issuance costs		427
Net proceeds		194,573
Issuance cost capitalized		2,456
Threshold amount of single voluntary prepayment from equity proceeds		$ 50,000
Prepayment premium percentage		5.00%
Threshold annual net sales to be maintained		$ 200,000
Interest expense			4,556	$ 2,986
Principal repayments
2021			37,500
2022			50,000
2023			50,000
2024			12,500
Total before unamortized discount and issuance costs			150,000
Less: unamortized discount and issuance costs			(4,289)
Total term notes			$ 145,711
Pharmakon Term Notes | Prepayment prior to the second-year anniversary
Debt
Prepayment premium percentage		3.00%
Pharmakon Term Notes | Prepayment on or after the second-year anniversary, but on or prior to the third-year anniversary
Debt
Prepayment premium percentage		2.00%
Pharmakon Term Notes | Prepayment on or after the third-year anniversary
Debt
Prepayment premium percentage		1.00%
Pharmakon Term Notes | LIBOR
Debt
Floor rate		2.00%

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