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Leases - Narrative (Details) | 3 Months Ended | 9 Months Ended
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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 |

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