Note 12 - Stock-based Compensation - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares	3 Months Ended
	Jan. 31, 2024	Oct. 31, 2023
Balance, July 31, 2023 (in shares)	1,675,403	1,803,265
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 2.29	$ 2.28
Granted (in shares)	10,000	17,500
Granted, Fair Value (in dollars per share)	$ 5.05	$ 3.36
Cancelled/Forfeited (in shares)		(12,300)
Cancelled/Forfeited, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 2.37
Vested (in shares)	(429,513)	(133,062)
Vested (in dollars per share)	$ 2.39	$ 2.18
Granted (in dollars per share)	5.05	3.36
Vested (in dollars per share)	$ 2.39	$ 2.18
Balance, October 31, 2023 (in shares)	1,255,890	1,675,403
Balance, October 31, 2023 (in dollars per share)	$ 2.28	$ 2.29