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Note 16 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating Leases, Rent Expense, Net $ 4,796 $ 4,102 $ 2,457
Amount Financed by Dealers $ 32,400 $ 26,100