Leases - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) facility	Sep. 30, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Non-cash lease expense	$ 35,000	$ 92,000	$ 123,000	$ 307,000
Sublease income	0	15,000	27,000	125,000
Operating lease, payments	$ 26,000	$ 110,000	$ 199,000	$ 408,000
City of Industry, California
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1