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Note 12 - Note Receivable Due From Distributor (Details Textual) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
May 31, 2012
Mar. 31, 2012
Loan Modification Agreement [Member]        
Due from Related Parties, Total     $ 2,000,000  
Notes Receivable, Interest Rate, Stated Percentage     6.00%  
Notes Receivable, Net Amount $ 1,282,072 $ 1,405,112    
Real Estate Investment [Member]        
Due from Related Parties, Total       $ 2,000,000