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Nature of Operations, Segment Reporting and Geographical Information - Summary of Selected Financial Information by Geographic Area (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales $ 68,592 $ 61,224
Long-Lived Assets 10,992 7,788
United States [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales 48,679 44,613
Long-Lived Assets 10,115 6,741
Europe [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales 14,909 12,324
Long-Lived Assets 538 609
Canada [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales 2,569 2,136
Long-Lived Assets 339 438
Asia [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales 1,167 910
Central and South America [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales 908 752
Other [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net Sales $ 360 $ 489