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Note 2 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Balance, beginning of the year | $ 167 | $ 147 | $ 593
Provision for doubtful accounts | 52 | 38 |
Amounts written off | (16) | (3) | (377)
Translation adjustments | (9) | (15) | (69)
Balance, end of the year | 194 | 167 | 147
Foreign Currency Spot Rate [Member] |  |  |
Provision for doubtful accounts | $ 52 | $ 38 |

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