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Note 8 - Outstanding Warrants - Fair Value Assumptions (Details)	Sep. 30, 2022 yr	Sep. 30, 2021 yr
Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0	0
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	1.75	0.19
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	151.41	139.35
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	3.52	2.00
Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input	10.47	0.01
Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	11.29	6.83
Fair Value per Warrant on Grant Date [Member]
Warrants and Rights Outstanding, Measurement Input	9.68	6.82

X

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

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