Quarterly report pursuant to Section 13 or 15(d)

Royalty and licensing income (Details)

v3.3.1.900
Royalty and licensing income (Details) - USD ($)
$ in Millions
6 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Royalty and licensing income (Details) [Line Items]    
Patent Expiration Date Apr. 24, 2018  
Life Sciences [Member]    
Royalty and licensing income (Details) [Line Items]    
Royalty Revenue $ 0.9 $ 1.6