Quarterly report pursuant to Section 13 or 15(d)

Royalty and licensing income (Details)

v2.4.0.8
Royalty and licensing income (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Oct. 31, 2013
Oct. 31, 2012
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 $ 1.6 $ 1.9