Note 9 - Stock-based Awards: Summary of fair value of options issued and outstanding (Tables)

12 Months Ended

Sep. 30, 2021

Options

Summary of fair value of options issued and outstanding

	Options Granted at May 6, 2021	Options Granted at October 8, 2020	Options Granted at October 29, 2019
Expected volatility	167.9%	171.9%	149.5%
Stock price on date of grant	$0.20	$0.25	$ 0.07
Exercise price	$0.25	$0.25	$ 0.08
Expected dividends	-	-	-
Expected term (in years)	5	5	5
Risk-free rate	0.05%	0.09%	1.66%
Expected forfeiture rate	0%	0%	0%
Fair value of vested options at grant date	$519,400	$127,022	$161,100