Net (Loss) / Income Per Share (“EPS”) - Computation of diluted EPS (Details) - shares	3 Months Ended		6 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Accounting Policies [Abstract]
Weighted average number of common shares outstanding - Basic	49,967,615	22,430,121	36,387,206	22,430,121
Potentially dilutive common stock equivalents	5,127,472	32,085,329	5,127,472	32,085,329
Weighted average number of common and equivalent shares outstanding-Diluted	55,095,087	54,515,450	41,514,678	54,515,450