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Note 7 - Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | As of December 31, |
|  | 2017 |  |  | 2016 |
Accrued salaries and other compensation |  | $ | 1,072 |  |  | $ | 1,098 |
Sales and marketing programs |  |  | 435 |  |  |  | 319 |
Product warranty |  |  | 245 |  |  |  | 246 |
Other accrued liabilities |  |  | 91 |  |  |  | 231 |
Total |  | $ | 1,843 |  |  | $ | 1,894 |

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