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, 2023	Jul. 31, 2022
Customer A [Member]
Concentration	22.00%	0.00%
Customer B [Member]
Concentration	16.00%	0.00%
Customer C [Member]
Concentration	13.00%	0.00%
Customer D [Member]
Concentration	12.00%	0.00%
Customer E [Member]
Concentration	11.00%	0.00%
Customer F [Member]
Concentration	7.00%	57.00%
Customer G [Member]
Concentration	3.00%	42.00%
Other Customer [Member]
Concentration	16.00%	1.00%
All Customers [Member]
Concentration	100.00%	100.00%