Revenue Recognition (Details)	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Revenue Recognition (Details) [Line Items]
Percentage of total revenues		76.00%		76.00%
Clinical Services Revenue [Member]
Revenue Recognition (Details) [Line Items]
Percentage of total revenues	71.00%		71.00%