Note 14 - Sales and Service Revenue and Cost of Sales and Services - Sales and Service Revenue and Cost of Sales and Service Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Revenue	$ 0	$ 0	$ 66,837	$ 224
Cost of revenues	0	0	(42,360)	(187)
Sale of Inventory [Member]
Revenue	0	0	66,837	0
Cost of revenues	0	0	(42,360)	0
Toll Processing Services [Member]
Revenue	0	0	0	224
Cost of revenues	$ 0	$ 0	$ 0	$ (187)

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details