Consolidated Statements of Stockholders Equity Statement - USD ($) $ in Thousands	Total	Common & Class B Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Total, Beginning of Period at Jul. 31, 2024	$ 210,588	$ 1,982	$ 60,031	$ 232,247	$ (84,441)	$ 769
Common & Class B Stock, Beginning of Period (in shares) at Jul. 31, 2024		19,825,170
Treasury Stock, Beginning of Period (in shares) at Jul. 31, 2024					(5,230,529)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	16,376	$ 0	0	16,376	$ 0	0
Other Comprehensive Loss	(42)	0	0	0	0	(42)
Dividends Declared	(2,098)	0	0	(2,098)	0	0
Purchases of Treasury Stock	(1,984)	0	0	0	$ (1,984)	0
Purchases of Treasury Stock (in shares)					(29,002)
Net issuance of stock under long-term incentive plans	0	$ 4	572	0	$ 576	0
Net issuance of stock under long-term incentive plans (in shares)		(40,800)			(10,739)
Amortization of Restricted Stock	1,152	$ 0	1,152	0	$ 0	0
Total, End of Period at Oct. 31, 2024	223,992	$ 1,986	61,755	246,525	$ (87,001)	727
Common Stock & Class B Stock, End of Period (in shares) at Oct. 31, 2024		19,865,970
Treasury Stock, End of Period (in shares) at Oct. 31, 2024					(5,270,270)
Total, Beginning of Period at Jul. 31, 2025	259,060	$ 1,993	66,138	277,500	$ (87,540)	969
Common & Class B Stock, Beginning of Period (in shares) at Jul. 31, 2025		19,926,745
Treasury Stock, Beginning of Period (in shares) at Jul. 31, 2025					(5,283,509)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	15,456	$ 0	0	15,456	$ 0	0
Other Comprehensive Loss	(44)	0	0	0	0	(44)
Dividends Declared	(2,433)	0	0	(2,433)	0	0
Purchases of Treasury Stock	(6,960)	0	0	0	$ (6,960)	0
Purchases of Treasury Stock (in shares)					(117,239)
Net issuance of stock under long-term incentive plans	0	$ 5	11	0	$ 16	0
Net issuance of stock under long-term incentive plans (in shares)		(51,700)			(500)
Amortization of Restricted Stock	1,448	$ 0	1,448	0	$ 0	0
Total, End of Period at Oct. 31, 2025	$ 266,527	$ 1,998	$ 67,597	$ 290,523	$ (94,516)	$ 925
Common Stock & Class B Stock, End of Period (in shares) at Oct. 31, 2025		19,978,445
Treasury Stock, End of Period (in shares) at Oct. 31, 2025					(5,401,248)