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Note 8 - Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 12, 2017
Proceeds from Issuance of Common Stock		$ 650,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 132,080
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years 91 days
Stock Incentive Plan [Member]
Share-based Payment Arrangement, Expense	$ 108,522	$ 0
Equity Line Agreement [Member]
Stock Issued During Period, Shares, New Issues		311,816
Proceeds from Issuance of Common Stock		$ 650,000
Mountain States Capital, LLC [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 10,000,000