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Note 5 - Property and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Accumulated depreciation $ (3,939,251) $ (1,912,847)
Total Property and Equipment, net 41,702,155 9,111,013
Structures and Displays [Member]    
Property, plant and equipment, gross 44,025,894 10,484,725
Vehicles and Equipment [Member]    
Property, plant and equipment, gross 642,081 143,154
Office Furniture and Equipment [Member]    
Property, plant and equipment, gross $ 973,431 $ 395,981