Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Income Tax Disclosure [Line Items]      
Effective tax rate (provision) benefit (3.00%) 57.00% (113.00%)
Deferred tax assets, operating loss carry forwards, domestic $ 9,900,000    
Operating loss carry forwards, expiry beginning year 2016    
Deferred tax assets, operating loss carry forwards, state and local 38,400,000    
Deferred tax assets, operating loss carry forwards, foreign 4,000,000    
Deferred tax assets capital loss carry forwards, domestic 10,700,000    
Capital loss carry forwards expiration dates 2018    
Deferred tax assets, tax credit carry forwards, alternative minimum tax 600,000    
Deferred tax assets, tax credit carry forwards, foreign 1,400,000    
Valuation allowance 20,789,000 19,965,000  
Valuation allowance increased 800,000    
Allocation of cumulative undistributed earnings of foreign subsidiaries, reinvestment 82,200,000    
Repatriated amount subject to US tax rate 49,000,000    
Unrecognized tax benefits income tax expense 100,000    
Expense attributable to increases in uncertain tax positions 600,000    
Tax benefit recognized 439,000 737,000  
Related tax positions 6,035,000 9,364,000 6,464,000
Unrecognized tax benefits, interest on income taxes expense 400,000    
State and Local Jurisdiction [Member]
      
Income Tax Disclosure [Line Items]      
Deferred tax assets, tax credit carry forwards, research 3,500,000    
Deferred tax assets tax credit carry forward investment 200,000    
Deferred tax assets tax credit carry forward, expiration period 2015    
Domestic Tax Authority [Member]
      
Income Tax Disclosure [Line Items]      
Deferred tax assets, tax credit carry forwards, research $ 1,500,000    
Deferred tax assets tax credit carry forward, expiration period 2015