Convertible Note Payable - Related party - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Accreted interest on convertible note payable - related party	$ 543	$ 0
Amortization of debt issuance cost	87	0
2021 Convertible Note without embedded derivative liability
Debt Instrument [Line Items]
Contractual interest expense	1,544
Accreted interest on convertible note payable - related party	543
Amortization of debt issuance cost	87
Total	$ 2,174	$ 0

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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Amount of amortization expense attributable to debt issuance costs.

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

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