Borrowings - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
2021 Convertible Note Payable \| Convertible Notes
Debt Instrument [Line Items]
Contractual interest expense	$ 1,789	$ 1,686	$ 5,264	$ 4,960
Amortization of debt discount	1,713	1,365	4,832	3,822
Amortization of debt issuance costs	165	132	467	371
Total	3,667	3,183	10,563	9,153
AFG Convertible Notes \| Related Party
Debt Instrument [Line Items]
Total				2,873
AFG Convertible Notes \| Convertible Notes \| Related Party
Debt Instrument [Line Items]
Contractual interest expense	1,308	1,020	3,617	2,659
Amortization of debt discount	246	192	682	550
Amortization of debt issuance costs	70	54	192	155
Total	1,624	1,266	4,491	3,364
Senior Secured Term Loan \| Secured Debt \| Nonrelated Party
Debt Instrument [Line Items]
Contractual interest expense	0	3,540	6,858	10,366
Amortization of debt discount	0	105	224	297
Amortization of debt issuance costs	0	929	1,980	2,624
Total	$ 0	$ 4,574	$ 9,062	$ 13,287

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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