Note 7 - Debt Securities - Schedule of Available-For-Sale Debt Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2026	Jul. 31, 2025
Amortized Cost	$ 38,774	$ 21,874
Gross Unrealized Gains	1	2
Gross Unrealized Losses	(163)	(227)
Fair Value	38,612	21,649
US Treasury Securities [Member]
Amortized Cost	25,950	12,953
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(9)	(27)
Fair Value	25,942	12,926
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost	10,077	5,554
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(17)	(4)
Fair Value	10,060	5,550
Corporate Bond Securities [Member]
Amortized Cost	2,747	3,367
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(137)	(196)
Fair Value	$ 2,610	$ 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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