Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.7.0.1
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Jul. 31, 2016
Income Taxes Disclosure [Line Items]        
Effective tax rate (benefit)/provision 26.00% 2.00% 4.00%  
Deferred tax assets, operating loss carry forwards, domestic $ 84,700,000      
Operating loss carry forwards, expiry beginning year 2018      
Deferred tax assets, operating loss carry forwards, state and local $ 117,500,000      
Deferred tax assets, operating loss carry forwards, foreign 6,300,000      
Deferred tax assets capital loss carry forwards, domestic $ 13,100,000      
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 2,000,000      
Tax credit carry forward with an unlimited carryforward period 800,000      
Valuation allowance 58,134,000 $ 47,368,000    
Valuation allowance increased 10,700,000      
Undistributed earnings of foreign subsidiaries 6,000,000      
Deferred tax liability related to the foreign income 14,675,000      
Incremental tax benefit 400,000      
Tax benefit recognized for the statute of limitations 269,000 325,000    
Tax benefit recognized for the effect of foreign translation 14,000 $ 51,000    
Interest on income tax expense 300,000      
Irish Operations [Member]        
Income Taxes Disclosure [Line Items]        
Undistributed earnings of foreign subsidiaries       $ 58,600,000
Deferred tax liability related to the foreign income       $ 14,700,000
State and Local Jurisdiction [Member]        
Income Taxes Disclosure [Line Items]        
Deferred tax assets, tax credit carry forwards, research 3,600,000      
Deferred tax assets tax credit carry forward investment 200,000      
Federal [Member]        
Income Taxes Disclosure [Line Items]        
Deferred tax assets, tax credit carry forwards, research $ 1,800,000