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Note 9 - Other Intangible Assets - Carrying Value of Definite Lived Intangible Assets (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Patents [Member]    
Estimated useful life 14 years  
Gross amount $ 429 $ 429
Accumulated amortization (429) (429)
Net balance
Noncompete Agreements [Member]    
Estimated useful life 5 years  
Gross amount $ 512 512
Accumulated amortization (434) (387)
Net balance $ 78 125
Customer Lists [Member]    
Estimated useful life 5 years  
Gross amount $ 2,046 2,046
Accumulated amortization (1,727) (1,535)
Net balance 319 511
Gross amount 2,987 2,987
Accumulated amortization (2,590) (2,351)
Net balance $ 397 $ 636