Net Income Per Share (“EPS”) - Computation of diluted EPS (Details) - shares	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Accounting Policies [Abstract]
Weighted average number of common shares outstanding - Basic	76,976,925	84,507,030	70,702,570	74,445,373
Potentially dilutive common stock equivalents	0	0	0	0
Weighted average number of common and equivalent shares outstanding-Diluted	76,976,925	84,507,030	70,702,570	74,445,373