Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

v3.7.0.1
Severance and Other Restructuring Costs - Additional Information (Detail)
$ in Thousands
 6 Months Ended 12 Months Ended
Jul. 31, 2017
USD ($)
Jul. 31, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]    
Restructing charges excluding plan related severance costs $ 2,497  
DCC Labs [Member]    
Restructuring Cost and Reserve [Line Items]    
Total restructuring charges incurred   $ 2,000
Facility and other restructuring costs 100  
Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Total restructuring charges incurred 5,500  
Estimated restructuring costs 7,500 $ 7,500
Severance costs $ 2,400