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Note 11 - Revenues - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Balance, beginning of period $ 227 $ 325
Bad debt expense 5 4
Charge-offs and other recoveries 26 (31)
Effect of foreign currency translation (4) (1)
Balance, end of period $ 254 $ 297