Annual report pursuant to Section 13 and 15(d)

Subsequent Event (Details)

v3.10.0.1
Subsequent Event (Details)
$ in Thousands
 12 Months Ended
Aug. 27, 2018
USD ($)
ft²
Jul. 31, 2018
USD ($)
Jul. 31, 2017
USD ($)
Jul. 31, 2016
USD ($)
Subsequent Event (Details) [Line Items]        
Payments to Acquire Property, Plant, and Equipment (in Dollars) | $   $ 1,888 $ 1,753 $ 1,530
Farmingdale, NY [Member] | Subsequent Event [Member]        
Subsequent Event (Details) [Line Items]        
Area of Land | ft² 36,000      
Payments to Acquire Property, Plant, and Equipment (in Dollars) | $ $ 6,000      
Enzo New York [Member] | Subsequent Event [Member]        
Subsequent Event (Details) [Line Items]        
Area of Land | ft² 101,000