Net Income Per Share (“EPS”) - Computation of diluted EPS (Details) - shares	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Accounting Policies [Abstract]
Weighted average number of common shares outstanding - Basic	65,603,002	64,462,007	67,765,862	48,195,762
Potentially dilutive common stock equivalents	0	0	0	8,397,084
Weighted average number of common and equivalent shares outstanding-Diluted	65,603,002	64,462,007	67,765,862	56,592,846