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Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Contractual interest expense	$ 2,062	$ 2,052	$ 4,125	$ 4,021
Amortization of debt issuance costs	821	457	1,643	807
Accretion of debt discount	0	7,482	0	12,389
Total convertible debt interest expense	2,883	9,991	5,768	17,217
Finance lease interest expense	474	328	880	661
Interest expense	$ 3,357	$ 10,319	$ 6,648	$ 17,878

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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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