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Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Jul. 31, 2024
Debt Securities, Available-for-Sale, Amortized Cost	$ 18,932	$ 23,818
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	2	11
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(251)	(391)
Debt Securities, Available-for-Sale	18,683	23,438
US Treasury Bill Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	13,833	16,641
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		10
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(31)	(66)
Debt Securities, Available-for-Sale	13,802	16,585
US Government-sponsored Enterprises Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	1,617	3,356
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(3)
Debt Securities, Available-for-Sale	1,617	3,353
Corporate Bond Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	3,482	3,821
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	2	1
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(220)	(322)
Debt Securities, Available-for-Sale	$ 3,264	$ 3,500

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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