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Note 12 - Segment Reporting - Summary of Amortizable Intangible Assets by Geographic Region (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Amortizable intangible assets $ 43,322,522 $ 45,651,912
CANADA    
Amortizable intangible assets 7,414,822 7,748,940
UNITED STATES    
Amortizable intangible assets 35,839,260 37,783,202
GERMANY    
Amortizable intangible assets $ 68,440 $ 119,770