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Earnings (Loss) Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 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	26,263	24,675	24,970	24,649
Effect of dilutive securities:
Stock options
Non-vested restricted Class B common stock			2
Diluted weighted-average number of shares	26,263	24,675	24,972	24,649

X

- 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

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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

Number of additional shares included in diluted EPS for potentially dilutive effect of nonvested equity-based payment award containing forfeitable rights to dividends or dividend equivalents, whether paid or unpaid.

+ References

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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