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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Dec. 31, 2014
Jan. 31, 2014
Income Taxes [Line Items]        
Recognized deferred tax liability related to undistributed earnings $ 0      
Unrecognized deferred tax liability related to undistributed earnings 4,200,000      
Deferred tax assets 2,716,000 $ 2,837,000    
Valuation allowance, deferred tax assets (16,647,000) (1,379,000)    
Deferred tax asset 416,000 123,000   $ 5,000
Unrecognized Tax Benefit 0 237,000    
Accrued interest and penalties   145,000    
Potential penalties and interest 145,000 $ 10,000 $ 222,000  
Foreign Country [Member]        
Income Taxes [Line Items]        
Tax credit carry forwards $ 823,000      
Tax credit carry forwards expiration year 2021