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Debt - Interest Expense (Details) - 2025 Notes - Convertible Debt - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 1,315	$ 1,315	$ 2,631	$ 2,584
Amortization of debt discount	207	207	414	415
Amortization of debt issuance costs	165	165	330	330
Total interest expense	$ 1,687	$ 1,687	$ 3,375	$ 3,329

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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