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Note 3 - Accounts Receivable, Net - Summary of Accounts Receivable, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Trade accounts receivable, net of allowance for credit losses of $4,333 and $3,857, respectively $ 75,098 $ 65,684
Unbilled receivables 33,511 26,215
Taxes receivable 15,232 14,292
Affiliated [1] 549 549
Other receivables 3,541 3,867
Total accounts receivable, net $ 127,931 $ 110,607
[1] Amounts represent expenditures on behalf of non-consolidated affiliates.