Long-term Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 403	$ 94
2019 Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Amortization of debt issuance costs	10	94
Cash interest expense	49	431
Total interest expense	59	525
2021 Convertible Senior Notes due 2027
Debt Instrument [Line Items]
Amortization of debt issuance costs	393
Cash interest expense	809
Total interest expense	1,202
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt issuance costs	403	94
Cash interest expense	858	431
Total interest expense	$ 1,261	$ 525