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Convertible Notes (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest expense related to notes
Amortization of discount and debt issuance costs	$ 105	$ 1,874
Interest expense	605	2,614
1.375% Convertible senior notes due 2023 | Convertible senior notes
Interest expense related to notes
Coupon interest expense	316	593
Amortization of discount and debt issuance costs	105	1,874
Interest expense	$ 421	$ 2,467
Convertible notes, stated interest rate (as a percentage)	1.375%	1.375%

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