Note 8 - Shareholders' Equity (Tables)

12 Months Ended

Sep. 30, 2022

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2022		2021
Weighted average exercise price	$	0.99	$	3.91
Risk free interest rate		2.56% - 2.97%		0.16% - 0.85%
Volatility		101.23% - 103.98%		100.72% - 105.43%
Expected term (in years)		2.5 - 5.5		2.5 - 5.5
Divident yield	None		None

	2022			2021
Weighted average exercise price	$	-		$3.74
Risk free interest rate		0.00	%		0.39% - 0.89%
Volatility		0.00	%		103.42	%
Expected term (in years)		-			2.75
Divident yield	-			None