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Note 3 - Revenue - Components of Accounts Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Trade receivables $ 5,500 $ 2,122
Unbilled receivables 1,106 1,277
Other short-term receivables 78 83
Allowance for doubtful accounts (260) (223)
Total accounts receivable $ 6,424 $ 3,259