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Note 5 - Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Patents |  | Non- Compete |  | Customer List |  | Total
Estimated useful life (in years) |  |  | 14 |  |  |  | 5 |  |  |  | 5 |  |  |  |  |
Gross amount at December 31, 2016 |  | $ | 429 |  |  | $ | 512 |  |  | $ | 2,046 |  |  | $ | 2,987 |
Accumulated amortization at December 31, 2016 |  |  | (429 | ) |  |  | (449 | ) |  |  | (1,791 | ) |  |  | (2,669 | )
Net balance at December 31, 2016 |  | $ | - |  |  | $ | 63 |  |  | $ | 255 |  |  | $ | 318 |
Gross amount at December 31, 2015 |  | $ | 429 |  |  | $ | 512 |  |  | $ | 2,046 |  |  | $ | 2,987 |
Accumulated amortization at December 31, 2015 |  |  | (429 | ) |  |  | (387 | ) |  |  | (1,535 | ) |  |  | (2,351 | )
Net balance at December 31, 2015 |  | $ | - |  |  | $ | 125 |  |  | $ | 511 |  |  | $ | 636 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2017 |  |  | 318 |
Total |  | $ | 318 |

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