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Note 9 - Other Current Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Other Current Assets [Table Text Block] |
|  | December 31, |
|  | 2017 |  |  | 2016 |
Prepaid expenses |  | $ | 571 |  |  | $ | 1,973 |
Other |  |  | 1,432 |  |  |  | 757 |
Total |  | $ | 2,003 |  |  | $ | 2,730 |

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- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
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Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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