Note 13 - Stock-based Compensation - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Balance, Non-vested, number of shares (in shares)	1,012,016	1,086,988	1,086,988
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 2.83	$ 2.83	$ 2.83
Granted, Non-vested, number of shares (in shares)	1,289	24,415
Granted, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 5.53	$ 4.09
Cancelled/Forfeited, Non-vested, number of shares (in shares)	(22,449)	(12,062)
Cancelled/Forfeited, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 2.89	$ 2.85
Vested, Non-vested, number of shares (in shares)	(280,059)	(87,325)
Vested, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 2.5	$ 3.19
Balance, Non-vested, number of shares (in shares)	710,797	1,012,016	710,797
Nonvested, Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 2.97	$ 2.83	$ 2.97