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Note 4 - Inventories (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Inventory Current and Noncurrent [Table Text Block] |
|  | As of December 31, |
|  | 2017 |  |  | 2016 |
Current: |  |  |  |  |  |  |  |
Raw materials |  | $ | 197 |  |  | $ | 2,291 |
Finished goods |  |  | 14,218 |  |  |  | 9,086 |
Total |  | $ | 14,415 |  |  | $ | 11,377 |
Long-term: |  |  |  |  |  |  |  |
Raw materials |  | $ | 2,682 |  |  | $ | 599 |
Finished goods |  |  | 6,026 |  |  |  | 1,065 |
Total |  | $ | 8,708 |  |  | $ | 1,664 |

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