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Loss Per Share (Details) - Schedule of dilutive loss per share - shares	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Schedule of dilutive loss per share [Abstract]
Shares issuable upon exercise of stock options	1,026,777	570,801	1,026,777	570,801
Shares issuable upon vesting of restricted stock	79,600	135,641	79,600	135,641
Shares issuable upon exercise of warrants to purchase Class B common stock	26,189		26,189
Total	1,132,566	706,442	1,132,566	706,442