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Note 6 - Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Accumulated amortization $ (7,700) $ (6,740)
Intangible assets, gross 37,276 31,654
Intangible assets, net 29,576 24,914
Trade Names [Member]    
Trade name - not subject to amortization 18,995 17,525
Customer Relationships [Member]    
Finite-lived intangible assets, gross 18,022 13,972
Accumulated amortization (7,600) (6,698)
Finite-lived intangible assets, net 10,422 7,274
Noncompete Agreements [Member]    
Finite-lived intangible assets, gross 259 157
Accumulated amortization (100) (42)
Finite-lived intangible assets, net $ 159 $ 115