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Prepaid Expenses and Other Assets (Details - Prepaid Expenses) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Prepaid Expenses And Other Assets |  |
Contract assets | $ 304 | $ 0
Prepaid insurance | 143 | 107
Prepaid licenses | 14 | 98
Employee retention credit receivable | 0 | 1,363
Prepaid other | 174 | 309
Total prepaid expenses and other assets | $ 635 | $ 1,877

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