Debt - Insurance Premium Financing (Details) - USD ($)	1 Months Ended			3 Months Ended		9 Months Ended
	May 31, 2022	May 31, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Short-term Debt [Line Items]
Financing balance				$ 6,221,000		$ 6,221,000
March 2021 First Insurance Financing
Short-term Debt [Line Items]
Principal amount			$ 98,000
Unpaid balance			$ 115,000
Interest rate (as a percent)			4.60%
Finance charge			$ 2,000
Interest expense					$ 0		$ 2,000
Debt term			10 months
Financing balance				0		0		$ 10,000
May 2021 First Insurance Financing
Short-term Debt [Line Items]
Principal amount		$ 1,100,000
Unpaid balance		$ 1,400,000
Interest rate (as a percent)		4.15%
Finance charge		$ 21,000
Interest expense				0	$ 6,000	6,000	$ 8,000
Debt term		10 months
Financing balance				0		0		$ 326,000
May 2022 First Insurance Financing
Short-term Debt [Line Items]
Principal amount	$ 752,000
Unpaid balance	$ 941,000
Interest rate (as a percent)	4.30%
Finance charge	$ 15,000
Interest expense				6,000		8,000
Debt term	10 months
Financing balance				$ 651,000		$ 651,000