Stock-Based Compensation Expense and Shareholders' Equity (Details 4) - shares	Apr. 30, 2020	Jul. 31, 2019
Common Stock Reserved for Issuance
Exercise of stock options to purchase common stock (in shares)	124,577	216,727
Stock Options
Common Stock Reserved for Issuance
Exercise of stock options to purchase common stock (in shares)	124,577	216,727
Vesting of restricted stock units (in shares)	2,504,143	2,384,673
Shares available under stock plans (in shares)	23,652,427	24,776,361
Total common stock reserved for issuance (in shares)	26,281,147	27,377,761

Common stock reserved for issuance.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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