XML 43 R29.htm IDEA: XBRL DOCUMENT v3.8.0.1
Equity (Tables)
 12 Months Ended
Jul. 31, 2017
Equity [Abstract]  
Summary of changes in the components of equity
  Series B Convertible Preferred Stock 
(dollars in thousands)  Shares   Amount 
Balance at July 31, 2015  947  $100 
Reclassification of mezzanine equity  (947)  (100)
Balance at July 31, 2016  —  $—