Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Stockholders' Equity (Details) - Schedule of share-based compensation expense by line item - USD ($)
$ in Thousands
3 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement $ 151 $ 111
Cost of Clinical Laboratory Services [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement 2 1
Selling, General and Administrative Expenses [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Share-based Payment Arrangement $ 149 $ 110