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Revenue Recognition (Details Textual) - ASC 606 [Member] $ in Millions	9 Months Ended
	Apr. 30, 2019 USD ($)
Revenue Recognition (Textual)
Deferred revenue	$ 8.6
Deferred Income Tax Assets [Member]
Revenue Recognition (Textual)
Deferred Customer Contract Acquisition Costs	0.8
Accumulated deficit [Member]
Revenue Recognition (Textual)
Deferred Customer Contract Acquisition Costs	1.3
Other current assets [Member]
Revenue Recognition (Textual)
Defer costs	0.6
Other assets [Member]
Revenue Recognition (Textual)
Defer costs	$ 0.7

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- References

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Amount of the cumulative effect on retained earnings net of related income tax effect.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794

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