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Note 13 - Revenues - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Balance, beginning of period $ 325 $ 332
Bad debt expense 17 288
Charge-offs and other recoveries (124) (293)
Effect of foreign currency translation 9 (2)
Balance, end of period $ 227 $ 325