Note 9 - Other Intangible Assets - Definite Lived Intangible Assets (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
---|---|---|
Sep. 30, 2017 |
Dec. 31, 2016 |
|
Estimated useful life (Year) | ||
Gross amount | $ 2,987 | $ 2,987 |
Accumulated amortization | (2,908) | (2,669) |
Net balance | $ 79 | $ 318 |
Patents [Member] | ||
Estimated useful life (Year) | 14 years | 14 years |
Gross amount | $ 429 | $ 429 |
Accumulated amortization | (429) | (429) |
Net balance | ||
Noncompete Agreements [Member] | ||
Estimated useful life (Year) | 5 years | 5 years |
Gross amount | $ 512 | $ 512 |
Accumulated amortization | (496) | (449) |
Net balance | $ 16 | $ 63 |
Customer Lists [Member] | ||
Estimated useful life (Year) | 5 years | 5 years |
Gross amount | $ 2,046 | $ 2,046 |
Accumulated amortization | (1,983) | (1,791) |
Net balance | $ 63 | $ 255 |