Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.19.1
Basis of Presentation (Details) - Third Party Payer And Health Maintenance Organizations [Member] - Clinical Services [Member]
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2019
Jan. 31, 2018
Jul. 31, 2018
Sales Revenue, Net [Member]          
Basis of Presentation (Details) [Line Items]          
Concentration Risk, Percentage 42.00% 38.00% 42.00% 39.00%  
Accounts Receivable [Member]          
Basis of Presentation (Details) [Line Items]          
Concentration Risk, Percentage     24.00%   29.00%