Note 17 - Stock-Based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Share-Based Payment Arrangement, Noncash Expense	$ 5,172	$ 5,523	$ 4,681
Common stock issued under Stock Incentive Plan		945	1,478
Share-Based Payment Arrangement, Noncash Expense	5,172	5,523	4,681
Common stock issued to employees		945	1,478
Share-Based Payment Arrangement, Employee [Member]
Amortization of stock option expenses	1,682	1,727	960
Amortization of RSU expenses	92	132	38
Share-Based Payment Arrangement, Noncash Expense	1,774	2,747	2,185
Common stock issued under Stock Incentive Plan	0	888	1,187
Share-Based Payment Arrangement, Noncash Expense	1,774	2,747	2,185
Common stock issued to employees	0	888	1,187
Consultants [Member]
Common stock issued to consultants	0	445	770
Amortization of stock option expenses	347	561	220
Amortization of RSU expenses	41	0	0
Share-Based Payment Arrangement, Noncash Expense	388	1,006	990
Share-Based Payment Arrangement, Noncash Expense	388	1,006	990
Management [Member]
Amortization of stock option expenses	611	400	471
Amortization of RSU expenses	2,399	1,370	1,035
Share-Based Payment Arrangement, Noncash Expense	3,010	1,770	1,506
Common stock issued under Stock Incentive Plan	0	0	0
Share-Based Payment Arrangement, Noncash Expense	3,010	1,770	1,506
Common stock issued to employees	$ 0	$ 0	$ 0