Notes Payable - Composition of debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Notes Payable
Gross proceeds	$ 75,000
Contractual exit fee	1,500
Unamortized debt discount and issuance costs	(6,573)
Total	$ 69,927	$ 40,809

Amount of unamortized debt discount (premium) and debt issuance costs.

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