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Earnings (Loss) Per Share (Details) - shares shares in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2019 | Jan. 31, 2018 | Jan. 31, 2019 | Jan. 31, 2018
Weighted-average number of shares used in the calculation of basic and diluted earnings (loss) per share [Abstract] |  |  |  |
Basic weighted-average number of shares | 24,816 | 24,643 | 24,323 | 24,635
Effect of dilutive securities: |  |  |  |
Stock options |  | 10 |  |
Non-vested restricted Class B common stock | 5 | 71 |  |
Diluted weighted-average number of shares | 24,821 | 24,724 | 24,323 | 24,635

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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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