Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details) - Schedule of share-based compensation expense by line item

v2.4.0.8
Stockholders' Equity (Details) - Schedule of share-based compensation expense by line item (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement $ 98 $ 103
Cost of Clinical Laboratory Services [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement 1 2
Research and Development Expense [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement 1 1
Selling, General and Administrative Expenses [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement $ 96 $ 100