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Operating Lease Liabilities and Right-of-Use Assets - Narrative (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) facility | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items] |  |  |
Non-cash lease expense | $ 214,000 | $ 502,000 |
Sublease income | 0 | 140,000 |
Operating lease, right-of-use asset, net | 17,000 | 142,000 | $ 659,000
Operating lease liabilities | 17,000 | 236,000 | $ 728,000
Impairment charges - right-of use assets | $ 0 | $ 179,000 |
Los Angeles |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Number of properties | facility | 3 |  |
City of Industry |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Number of facilities | facility | 1 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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