Note 1 - Nature of Business and Basis of Presentation - Restricted Cash (Details) - USD ($)	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Cash and cash equivalents	$ 62,078	$ 465,843
Restricted cash	326,222	826,219
Total cash, cash equivalents, and restricted cash shown in the cash flow statement	$ 388,300	$ 1,292,062	$ 4,506,902	$ 4,016,949