Note 4 - Notes Receivable (Details Textual) - Promissory Note Agreement [Member] - USD ($)	Sep. 30, 2019	Sep. 30, 2018
Feilong Trading, Inc, [Member]
Promissory Note Receivable, Maximum Borrowing Capacity		$ 4,000,000
Note Receivable, Interest Rate		5.00%
Note Receivable Sold, Original Amount	$ 3,622,505
Mr Zhou Min Ni [Member]
Treasury Stock Shares Exchanged for Note Receivable (in shares)	272,369
Restricted Shares, Held in Escrow (in shares)	89,882
Treasury Stock Shares Exchanged for Note Receivable, Per Share (in dollars per share)	$ 13.30