Note 12 - Stock-based Compensation - Schedule of Outstanding Stock Options (Details) - $ / shares	3 Months Ended				9 Months Ended
	Apr. 30, 2024	Jan. 31, 2024	Oct. 31, 2023	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Balance, number of stock options (in shares)	6,649,539	7,518,042	8,326,983		8,326,983
Balance, Weighted Average Exercise Price (in dollars per share)	$ 2.01	$ 1.94	$ 1.92		$ 1.92
Granted, Non-vested, number of shares (in shares)	40,143	10,000	17,500
Granted, Weighted Average Exercise Price (in dollars per share)	$ 6.7	$ 7.63	$ 5.04
Exercised, number of stock options (in shares)	(406,411)	(878,503)	(608,182)	(337,500)	(1,893,096)	(2,865,832)
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 1.61	$ 1.45	$ 1.69
Cancelled/Forfeited, number of stock options (in shares)	(8,600)		(191,259)
Cancelled/Forfeited, Weighted Average Exercise Price (in dollars per share)	$ 3.45		$ 1.59
Expired, number of stock options (in shares)	(25,000)		(27,000)
Expired, Weighted Average Exercise Price (in dollars per share)	$ 1.44		$ 3.69
Granted, Weighted Average Exercise Price (in dollars per share)	$ 6.7	$ 7.63	$ 5.04
Exercised, number of stock options (in shares)	(406,411)	(878,503)	(608,182)	(337,500)	(1,893,096)	(2,865,832)
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 1.61	$ 1.45	$ 1.69
Cancelled/Forfeited, Weighted Average Exercise Price (in dollars per share)	3.45		1.59
Expired, Weighted Average Exercise Price (in dollars per share)	$ 1.44		$ 3.69
Balance, number of stock options (in shares)	6,249,671	6,649,539	7,518,042		6,249,671
Balance, Weighted Average Exercise Price (in dollars per share)	$ 2.07	$ 2.01	$ 1.94		$ 2.07