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Note 5 - Notes Receivable (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Sep. 30, 2017
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]        
Receivable Commitment to Lend       $ 1,500,000
Payments to Acquire Notes Receivable     $ 550,000  
Equity Method Investment, Ownership Percentage     40.00%  
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] | Loan Agreement, Six Percent, Maturing June 2021 [Member]        
Payments to Acquire Notes Receivable     $ 1,000,000  
Notes Receivable, Stated Interest Rate     6.00%  
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] | Loan Agreement, Six Percent, Maturing October 2021 [Member]        
Payments to Acquire Notes Receivable $ 500,000      
Notes Receivable, Stated Interest Rate 6.00%      
Private Limited India Based Company in the FinTech Industry [Member]        
Receivable Commitment to Lend   $ 435,000    
Payments to Acquire Notes Receivable   $ 235,000    
Notes Receivable, Stated Interest Rate   5.00%    
Private Limited India Based Company in the FinTech Industry [Member] | Maximum [Member]        
Notes Receivable, Conversion, Percentage   10.00%