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Note 5 - Other Comprehensive Loss - Accumulated Other Comprehensive Loss Balances (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Balance $ 11,977,577 $ 12,589,024
Balance 10,444,260 11,977,577
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Balance (5,593,878) (4,076,318)
Accumulated Other Comprehensive Loss, Current period change 228,514 (1,517,560)
Balance (5,365,364) (5,593,878)
AOCI Attributable to Parent [Member]    
Balance (5,593,878) (4,076,318)
Accumulated Other Comprehensive Loss, Current period change 228,514 (1,517,560)
Balance $ (5,365,364) $ (5,593,878)