Note 13 - Income Taxes (Tables)

9 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2025			2024			2025			2024
Income tax benefit at U.S. federal statutory rates	$	(1,537,851	)	$	(2,171,412	)	$	(3,566,933	)	$	(5,609,213	)
State income tax benefit, net of federal benefit		(403,409	)		(168,129	)		(560,518	)		(434,313	)
Non-deductible expenses		58,150			2,000			78,763			2,708
U.S. research and development tax credit		6,722			1,109,784			(421,986	)		692,784
Effect of change in effective tax rate		554,430			—			554,430			—
Change in valuation allowance		1,321,958			1,227,757			3,916,244			5,348,034
Income tax expense	$	—		$	—		$	—		$	—