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Note 12 - Stockholders' (Deficit) - Accumulated Other Comprehensive Gain (Loss) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance $ (17,193,058) $ (21,127,798)
Balance (11,683,904) (17,193,058)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Balance (397,237) (410,505)
Activity (39,268) 13,268
Balance (436,505) (397,237)
AOCI Attributable to Parent [Member]    
Balance (397,237) (410,505)
Activity (39,268) 13,268
Balance $ (436,505) $ (397,237)