Revenue Recognition Remaining Performance Obligation (Tables)	3 Months Ended
Oct. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	Of the contract liability balance outstanding at October 31, 2019, the Company expects to recognize 29% by the end of fiscal 2020, an additional 27% by the end of fiscal 2021, and the remaining balance thereafter.

Tabular disclosure of expected timing for satisfying remaining performance obligation.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045

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