Quarterly report pursuant to Section 13 or 15(d)

Royalty and licensing income (Details)

v3.3.0.814
Royalty and licensing income (Details) - USD ($)
$ in Millions
3 Months Ended
Oct. 31, 2015
Oct. 31, 2014
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 $ 0.4 $ 1.0