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Guarantees - Indemnifications to Officers and Directors	12 Months Ended
Guarantees - Indemnifications to Officers and Directors	Jul. 31, 2018
Guarantees [Abstract]
Guarantees - Indemnifications to Officers and Directors	16 — Guarantees — Indemnifications to Officers and Directors The Company typically enters into indemnification agreements with its directors and certain of its officers to indemnify them to the extent permitted by law against any and all liabilities, costs, expenses, amounts paid in settlement and damages incurred by the directors as a result of any lawsuit, or any judicial, administrative or investigative proceeding in which the directors are sued as a result of their service as members of its Board of Directors.