Note 7 - Debt Securities - Schedule of Available-For-Sale Debt Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2026	Jul. 31, 2025
Amortized Cost	$ 26,716	$ 21,874
Gross Unrealized Gains	3	2
Gross Unrealized Losses	(162)	(227)
Fair Value	26,557	21,649
US Treasury Securities [Member]
Amortized Cost	15,799	12,953
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(15)	(27)
Fair Value	15,784	12,926
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost	8,000	5,554
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(10)	(4)
Fair Value	7,990	5,550
Corporate Bond Securities [Member]
Amortized Cost	2,917	3,367
Gross Unrealized Gains	3	2
Gross Unrealized Losses	(137)	(196)
Fair Value	$ 2,783	$ 3,173

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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