Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021	Jul. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability	$ 2,687,000		$ 2,687,000		$ 2,519,000
Deferred Revenue, Revenue Recognized	$ 297,000	$ 291,000	$ 882,000	$ 882,000
Remaining Performance Obligations Expected as Revenue During the Remainder of the Current Fiscal Year	11.00%		11.00%
Remaining Performance Obligations Expected as Revenue Over the Next Full Fiscal Year	38.00%		38.00%