Annual report pursuant to Section 13 and 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

v3.7.0.1
Severance and Other Restructuring Costs - Additional Information (Detail)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 06, 2016
USD ($)
Installments
Apr. 06, 2016
USD ($)
Installments
Feb. 29, 2016
USD ($)
Jul. 31, 2016
USD ($)
Jan. 31, 2017
USD ($)
Employee
Jan. 31, 2016
USD ($)
Jan. 31, 2015
USD ($)
Restructuring Cost and Reserve [Line Items]              
Restructuring charges         $ 7,151 $ 1,061 $ 3,623
Fiscal 2017 Restructuring Plan [Member]              
Restructuring Cost and Reserve [Line Items]              
Restructuring charges         5,100    
Severance costs         $ 3,100    
Former Employees [Member]              
Restructuring Cost and Reserve [Line Items]              
Number of employees terminated | Employee         13    
Former Chief Executive Officer and Chief Financial Officer [Member]              
Restructuring Cost and Reserve [Line Items]              
Severance costs         $ 1,500    
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     $ 700   700    
Timeline Labs [Member] | CALIFORNIA              
Restructuring Cost and Reserve [Line Items]              
Other restructuring charges, (relating to remaining lease obligation)         300    
Timeline Labs [Member] | Former Employees [Member]              
Restructuring Cost and Reserve [Line Items]              
Severance costs         $ 400