Long-term Debt - Schedule of Interest (Details) - Convertible Notes - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Contractual interest expense	$ 1,509	$ 386
Amortization of debt discount and issuance costs	355	650
Total interest expense	$ 1,864	1,036
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Amortization of debt discount and issuance costs		(569)
Total interest expense		(569)
Cumulative Effect, Period of Adoption, Adjusted Balance
Debt Instrument [Line Items]
Contractual interest expense		386
Amortization of debt discount and issuance costs		81
Total interest expense		$ 467