Debt - Net carrying amount (Details) - Convertible Notes [Member] - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt
Principal outstanding	$ 150,000	$ 150,000
Unamortized debt discount and issuance costs	(32,764)	(36,627)
Net carrying value	117,236	113,373
Fair value of the Notes	$ 118,200	$ 126,000

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant