Debt - Exchangeable Senior Notes - Interest expense (Details) - Exchangeable Senior Notes - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cash coupon	$ 60	$ 1,348	$ 391	$ 4,042
Amortization of debt discount		288		855
Amortization of issuance cost	12	249	83	739
Total interest expense	$ 72	$ 1,885	$ 474	$ 5,636

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

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Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration