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Note 1 - Basis of Presentation and Certain Significant Accounting Policies - Components of Inventory (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Inventory on hand:    
Finished goods held for sale $ 37,526,245 $ 34,824,728
Raw materials and work in process 917,966 1,138,316
Inventory in transit 2,276,419 1,348,153
Total $ 40,720,630 $ 37,311,197