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Debt - Net carrying amount (Details) - Convertible Notes - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal outstanding	$ 150,000	$ 150,000
Unamortized debt discount and issuance costs	(35,473)	(36,627)
Net carrying value	114,527	113,373
Fair value of the Notes	$ 127,500,000	$ 126,000,000.0

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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