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Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands		Jul. 31, 2024	Jul. 31, 2023
Debt Securities, Available-for-Sale, Amortized Cost		$ 23,818	$ 43,059
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		11
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(391)	(645)
Debt Securities, Available-for-Sale		23,438	42,414
US Treasury Bill Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost		16,641	31,186
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		10
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(66)	(148)
Debt Securities, Available-for-Sale		16,585	31,038
US Government-sponsored Enterprises Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost		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		3,353
Corporate Bond Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost		3,821	3,881
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(322)	(8)
Debt Securities, Available-for-Sale		$ 3,500	3,873
Certificates of Deposit [Member]
Debt Securities, Available-for-Sale, Amortized Cost	[1]		4,080
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	[1]
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	[1]		(4)
Debt Securities, Available-for-Sale	[1]		4,076
Municipal Bonds [Member]
Debt Securities, Available-for-Sale, Amortized Cost			3,912
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax			(485)
Debt Securities, Available-for-Sale			$ 3,427
[1] Each of the certificates of deposit held by the Company has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.

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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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