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Note 3 - Revenue - Components of Accounts Receivable (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Trade receivables | $ 3,295 | $ 4,605 |
Unbilled receivables | 3,444 | 3,082 |
Other short-term receivables | 126 | 152 |
Allowance for credit losses | (110) | (110) | $ (223)
Total accounts receivable | $ 6,755 | $ 7,729 |

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