Employees' Retirement Plan (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Retirement Benefits [Abstract]
Employer contributions		$ 112,469	$ 109,760	$ 337,500	$ 329,743
Pension contributions		$ 29,740	$ 17,925	$ 67,239	$ 48,498
Minimum contribution rate	19.66%			9.00%
Percentage of other condition of employment		23.00%		23.00%