Note 18 - Sales and Service Revenue and Cost of Sales and Services - Breakdown of Major Customers (Details) - Customer Concentration Risk [Member] - Revenue from Contract with Customer Benchmark [Member]	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Customer A [Member]
Concentration	0.00%	22.00%
Customer B [Member]
Concentration	0.00%	16.00%
Customer C [Member]
Concentration	0.00%	13.00%
Customer D [Member]
Concentration	0.00%	12.00%
Customer E [Member]
Concentration	0.00%	11.00%
Customer F [Member]
Concentration	0.00%	7.00%
Customer G [Member]
Concentration	0.00%	3.00%
Other Customer [Member]
Concentration	100.00%	16.00%
All Customers [Member]
Concentration	100.00%	100.00%