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Note 11 - Convertible Notes Payable - Notes Payable (Details) - Convertible Debt [Member]
Sep. 30, 2019
USD ($)
Principal amount $ 3,060,000
Less unamortized debt discount (856,888)
Less unamortized debt issuance costs (343,477)
Notes payable, net of unamortized debt discount and debt issuance costs $ 1,859,635