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Note 8 - Trade Accounts Receivable - Summary of Trade Accounts Receivable (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Trade accounts receivable, current | $ 5,332 | $ 5,947
Trade accounts receivable, long-term | 7 | 9
Allowance for doubtful accounts | (117) | (134)
Trade accounts receivable, net | 5,222 | 5,822
Unpaid deferred revenue included in trade accounts receivable | $ 1,042 | $ 2,073

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