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Note 1 - Basis of Presentation and Certain Significant Accounting Policies - Components of Inventory (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Inventory on hand:    
Finished goods held for sale $ 33,665,227 $ 30,684,026
Raw materials and work in process 1,574,142 1,034,041
Inventory in transit 2,088,119 1,459,472
$ 37,327,488 $ 33,177,539