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Convertible Notes (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest expense related to notes
Amortization of discount and debt issuance costs			$ 151	$ 3,775
Interest expense	$ 348	$ 2,683	$ 953	$ 5,297
1.375% Convertible senior notes due 2023 | Convertible senior notes
Interest expense related to notes
Convertible notes, stated interest rate (as a percentage)	1.375%	1.375%	1.375%	1.375%
Coupon interest expense	$ 169	$ 593	$ 485	$ 1,186
Amortization of discount and debt issuance costs	46	1,901	151	3,775
Interest expense	$ 215	$ 2,494	$ 636	$ 4,961

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Contractual interest rate for funds borrowed, under the debt agreement.

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