Note 5 - Senior Unsecured Note Payable: Schedule of fair value (Details) - USD ($)	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2021
Expected volatility	167.90%	171.90%	149.50%
Share Price				$ 0.23
Exercise price	$ 0.25	$ 0.25	$ 0.08
Expected dividends	$ 0	$ 0	$ 0
Expected term (in years)	5 years	5 years	5 years
Risk-free rate	0.05%	0.09%	1.66%
Expected forfeiture rate	0.00%	0.00%	0.00%
Series K Warrants Issued October 4, 2019
Expected volatility	147.20%
Share Price	$ 0.07
Exercise price	$ 0.08
Expected dividends	$ 0
Expected term (in years)	3 years 3 months 30 days
Risk-free rate	1.34%
Expected forfeiture rate	0.00%
Series F Warrants Canceled October 4, 2019
Expected volatility	147.20%
Share Price	$ 0.07
Exercise price	$ 0.09
Expected dividends	$ 0
Expected term (in years)	3 years 3 months 30 days
Risk-free rate	1.34%
Expected forfeiture rate	0.00%

Represents the percentage value of Expected forfeiture rate, during the indicated time period.

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- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Disclosure of the weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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