Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

v3.5.0.2
Severance and Other Restructuring Costs - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Jul. 06, 2016
USD ($)
Installments
Apr. 06, 2016
USD ($)
Installments
Oct. 31, 2016
USD ($)
Jul. 31, 2016
USD ($)
Oct. 31, 2015
USD ($)
Jul. 31, 2016
USD ($)
Oct. 31, 2016
USD ($)
Employee
Oct. 31, 2015
USD ($)
Restructuring Cost and Reserve [Line Items]                
Restructuring charges     $ 2,373   $ 197   $ 5,991 $ 1,026
Fiscal 2017 Restructuring Plan [Member]                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges     3,000          
Severance costs     $ 2,100       $ 2,100  
Former Employees [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of employees terminated | Employee             12  
Former Chief Executive Officer and Chief Financial Officer [Member]                
Restructuring Cost and Reserve [Line Items]                
Severance costs             $ 1,400  
CEO [Member] | CEO Separation Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Employee separation related liabilities including bonus payable $ 200 $ 1,000            
Bonus payable   200            
Employee separation liability payable   $ 800            
Number of equal monthly installments | Installments   12            
Number of equal semimonthly installments | Installments 12              
DCC Labs [Member]                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges       $ 1,900        
Timeline Labs [Member]                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges           $ 600 600  
Timeline Labs [Member] | CALIFORNIA                
Restructuring Cost and Reserve [Line Items]                
Other restructuring charges, (relating to remaining lease obligation)             100  
Timeline Labs [Member] | Former Employees [Member]                
Restructuring Cost and Reserve [Line Items]                
Severance costs             $ 500