Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheet Detail - Property and Equipment, Net (Detail)

v3.3.1.900
Consolidated Balance Sheet Detail - Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 36,771 $ 35,880
Less-Accumulated depreciation and amortization (22,642) (20,011)
Total property and equipment, net 14,129 15,869
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 2,880 2,880
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 20  
Property, Plant and Equipment, Gross $ 11,908 12,146
Office Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 5  
Property, Plant and Equipment, Gross $ 1,099 1,023
Computer Equipment, Software and Demonstration Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 3  
Property, Plant and Equipment, Gross $ 18,639 17,584
Service and Spare Components [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 5  
Property, Plant and Equipment, Gross $ 1,158 1,158
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 1,087 $ 1,089
Leasehold Improvements [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 1  
Leasehold Improvements [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 7