Condensed Consolidated Balance Sheet Parenthetical - USD ($) $ in Thousands	Oct. 31, 2023	Jul. 31, 2023
Allowance for doubtful accounts	$ 1,115	$ 1,087
Accumulated amortization of other intangibles	581	578
Accumulated amortization of customer lists	7,785	7,763
Net unamortized debt issuance costs	$ 158	$ 173
Common Stock
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares issued	8,807,223	8,750,223
Treasury stock, common shares	3,674,818	3,658,989
Common Class B
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares issued	2,522,056	2,397,056
Treasury stock, common shares	351,641	351,641