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Note 4 - Receivables and Allowance for Credit Losses - Receivables (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accounts receivable–trade $ 31,786 $ 26,912
Less allowance for credit losses (564) (484)
Receivables, net $ 31,222 $ 26,428