Condensed Consolidated Balance Sheet Parenthetical - USD ($) $ in Thousands	Oct. 31, 2020	Jul. 31, 2020
Current Assets
Allowance for doubtful accounts	$ 1,036	$ 1,078
Other Assets
Accumulated amortization of other intangibles	483	457
Accumulated amortization of customer lists	6,995	6,887
Noncurrent Liabilities
Net unamortized debt issuance costs	$ 143	$ 150
Common Stock
Stockholder's Equity
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares issued	8,506,476	8,449,003
Treasury stock, common shares	3,106,748	3,090,230
Common Class B
Stockholder's Equity
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares issued	2,413,141	2,437,402
Treasury stock, common shares	346,491	335,816