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Note 6 - Segment Reporting (Details Textual) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 01, 2016 | Jul. 01, 2015 | Dec. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 USD ($) | Sep. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 USD ($) | Dec. 31, 2014
Number of Reportable Segments |  |  |  |  | 1 |  |  |  | 2 |  |  |
Goodwill, Impairment Loss |  |  |  |  |  | $ 4,611 |  |  |  |  | $ 4,611 |
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  | 77.00% | 85.00% | 84.00%
Geographic Concentration Risk [Member] | Net Assets, Geographic Area [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  | 87.00% | 93.00% |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  |  |  | 0.25% |  |  | 0.25% | (0.25%) |  |  | 0.25% | 0.25%
Net Debt Leverage Ratio Not Achieved | 3 | 3 | 3 | 3 |  | 3 | 3 | 3 |  | 3 | 3 | 3
Ottomotores [Member] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  | $ (4,611) |
Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  |  | $ 36,076 |  |  |  |  | $ (36,076) |

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