Condensed Consolidated Balance Sheet Parenthetical - USD ($) $ in Thousands |
Apr. 30, 2016 |
Jul. 31, 2015 |
|---|---|---|
| Current Assets | ||
| Allowance for doubtful accounts | $ 886 | $ 761 |
| Other Assets | ||
| Accumulated amortization Trademarks and patents | 319 | 301 |
| Accumulated amortization Debt issuance costs | 154 | 133 |
| Accumulated amortization Customer lists | $ 3,119 | $ 2,094 |
| Common Stock | ||
| Stockholder's Equity | ||
| Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10 |
| Common stock, shares issued | 7,981,243 | 7,936,343 |
| Treasury stock, common shares | 2,923,053 | 2,932,796 |
| Common Class B | ||
| Stockholder's Equity | ||
| Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10 |
| Common stock, shares issued | 2,515,735 | 2,389,735 |
| Treasury stock, common shares | 324,741 | 324,741 |