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Convertible Senior Notes - Carrying Value of 2026 Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Feb. 05, 2021
Debt Instrument [Line Items]
2026 Notes embedded conversion derivative	$ 34,719
Convertible Debt | 2026 Notes
Debt Instrument [Line Items]
Principal amount	155,250
Less: unamortized discount and issuance costs, net of amortization	(37,558)
Carrying amount	117,692
Convertible Debt | 2026 Notes | Embedded conversion derivative
Debt Instrument [Line Items]
Less: unamortized discount and issuance costs, net of amortization	37,600
2026 Notes embedded conversion derivative	$ 34,719	$ 33,200

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