Note 1 - Nature of Operations (Details Textual) - USD ($)	2 Months Ended
	Sep. 30, 2020	Jul. 31, 2020	Jul. 31, 2019
Working Capital		$ 4,600,000
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 5,147,703	$ 6,058,186
Shares Issued, Price Per Share (in dollars per share)			$ 1.33
September 2020 Offering [Member] | Subsequent Event [Member]
Number of Units Issued During Period (in shares)	12,500,000
Shares Issued, Price Per Share (in dollars per share)	$ 1.20
Proceeds from Issuance or Sale of Equity, Total	$ 15,000,000