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Note 4 - Investment in account receivable (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Details        
Discount Amortization included in Interest Income $ 19,999 $ 21,401 $ 59,995 $ 57,754