Debt - Interest expense on 2019-1 Debt (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Components of interest expense
Borrowing interest expense	$ 3,952,000
Total interest and debt financing expenses	4,272,000
2019-1 Notes
Components of interest expense
Borrowing interest expense	3,526	$ 2,475	$ 7,418	$ 7,507
Amortization of deferred financing costs and upfront commitment fees	33	58	97	172
Total interest and debt financing expenses	$ 3,559	$ 2,533	$ 7,515	$ 7,679