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Note 2 - Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Balance as of December 31, 2022 $ 984  
Amounts accrued 318 $ 105
Write-offs charged against the allowance (228)  
Balance as of September 30, 2023 $ 1,074