Note 1 - Nature of Business and Basis of Presentation - Restricted Cash (Details) - USD ($)	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017
Cash and cash equivalents	$ 7,217	$ 198,144
Restricted cash	1,763,964	3,818,805
Total cash, cash equivalents, and restricted cash shown in the cash flow statement	$ 1,771,181	$ 4,016,949	$ 889,515	$ 1,627

Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant