Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Stockholders' Equity (Details) - Schedule of share-based compensation expense by line item - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2018
Jan. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based Payment Arrangement $ 208 $ 241 $ 413 $ 392
Cost of Clinical Laboratory Services [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based Payment Arrangement   1   3
Selling, General and Administrative Expenses [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based Payment Arrangement $ 208 $ 240 $ 413 $ 389