Contingencies (Details) $ in Millions	3 Months Ended
	Oct. 31, 2019 USD ($)
Contingencies (Details) [Line Items]
Number Of Pending Cases	3
Litigation Reimbursement	$ 0.8
Legal Fees Reimbursement	0.4
Subsequent Event [Member]
Contingencies (Details) [Line Items]
Legal Fees Reimbursement	$ 0.4