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Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Stock options excluded from the diluted earnings per share computations
Shares excluded from the calculation of diluted earnings per share	1,292	1,496
Stock options [Member]
Stock options excluded from the diluted earnings per share computations
Shares excluded from the calculation of diluted earnings per share	1,243	1,273
Non-vested restricted Class B common stock [Member]
Stock options excluded from the diluted earnings per share computations
Shares excluded from the calculation of diluted earnings per share	49	223

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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- References

No definition available.

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