Note 14 - Sales and Service Revenue and Cost of Sales and Services - Sales and Service Revenue and Cost of Sales and Service Renue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
SALES AND SERVICE REVENUE	$ 47,931	$ 13,191	$ 105,223	$ 13,191
COST OF SALES AND SERVICES	(33,361)	(9,248)	(76,795)	(9,248)
Sale of Inventory [Member]
SALES AND SERVICE REVENUE	47,836	13,146	105,045	13,146
COST OF SALES AND SERVICES	(33,282)	(9,211)	(76,647)	(9,211)
Toll Processing Services [Member]
SALES AND SERVICE REVENUE	95	45	178	45
COST OF SALES AND SERVICES	$ (79)	$ (37)	$ (148)	$ (37)