XML 82 R54.htm IDEA: XBRL DOCUMENT v3.19.3
Intangibles, Net (Details Textuals) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2017
Intangible Assets, Net (Excluding Goodwill) [Abstract]      
Amortization expenses $ 10.5 $ 14.0 $ 6.8
Assets Disposed of by Method Other than Sale, in Period of Disposition, Gain (Loss) on Disposition   $ 1.1