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
Jul. 06, 2016
USD ($)
Installments
Apr. 06, 2016
USD ($)
Installments
Jul. 31, 2016
USD ($)
Jul. 31, 2015
USD ($)
Jul. 31, 2016
USD ($)
Employee
Jul. 31, 2015
USD ($)
Restructuring Cost and Reserve [Line Items]            
Restructuring charges     $ 1,843 $ 617 $ 3,618 $ 829
Former Employees [Member]            
Restructuring Cost and Reserve [Line Items]            
Number of employees terminated | Employee         11  
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          
Former Chief Executive Officer and Chief Financial Officer [Member]            
Restructuring Cost and Reserve [Line Items]            
Severance costs         $ 1,400  
DCC Labs [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring charges     $ 1,500      
Timeline Labs [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring charges         700  
Timeline Labs [Member] | Canada [Member]            
Restructuring Cost and Reserve [Line Items]            
Other restructuring charges, (relating to remaining lease obligation)         200  
Timeline Labs [Member] | Former Employees [Member]            
Restructuring Cost and Reserve [Line Items]            
Severance costs         $ 500