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Debt and Lines of Credit (Details Textual)
6 Months Ended
Jul. 31, 2016
USD ($)
CreditFacility
Bank
Subsidiary
Jul. 31, 2016
CHF (SFr)
CreditFacility
Bank
Subsidiary
Jan. 31, 2016
USD ($)
Jul. 31, 2015
USD ($)
Bank
Subsidiary
Jul. 31, 2015
CHF (SFr)
Bank
Subsidiary
Jan. 30, 2015
USD ($)
Debt Instrument [Line Items]            
Loan drawn under the facility $ 38,000,000          
Letter of credit outstanding amount 300,000          
Line of credit facility remaining borrowing capacity 61,700,000          
Outstanding balance under facility, current $ 3,000,000   $ 5,000,000      
Number of issued standby letter of credit | CreditFacility 2 2        
Minimum            
Debt Instrument [Line Items]            
Consolidated Earnings Before Interest Tax Depreciation And Amortization $ 50,000,000          
Consolidated leverage ratio 2.50% 2.50%        
Maximum            
Debt Instrument [Line Items]            
Consolidated leverage ratio 1.00% 1.00%        
Unsecured Debt | Swiss subsidiary            
Debt Instrument [Line Items]            
Line of credit facility, maximum borrowing capacity $ 5,200,000 SFr 5,000,000   $ 5,200,000 SFr 5,000,000  
Outstanding borrowing amount $ 0     $ 0    
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020            
Debt Instrument [Line Items]            
Asset based senior revolving credit facility           $ 100,000,000
Line of credit facility, maximum borrowing capacity           50,000,000
Credit facility matures date Jan. 30, 2020          
Outstanding balance under facility, current $ 3,000,000          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | London Interbank Offered Rate L I B O R            
Debt Instrument [Line Items]            
Applicable margin rate 1.25%          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | London Interbank Offered Rate L I B O R | Minimum            
Debt Instrument [Line Items]            
Applicable margin rate 1.25%          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | London Interbank Offered Rate L I B O R | Maximum            
Debt Instrument [Line Items]            
Applicable margin rate 1.75%          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | Base Rate            
Debt Instrument [Line Items]            
Applicable margin rate 0.25%          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | Base Rate | Minimum            
Debt Instrument [Line Items]            
Applicable margin rate 0.25%          
Revolving Credit Facility | Secured Debt | Credit Agreement Due on January 30, 2020 | Base Rate | Maximum            
Debt Instrument [Line Items]            
Applicable margin rate 0.75%          
Letter of Credit            
Debt Instrument [Line Items]            
Credit facility matures date May 31, 2017          
Outstanding borrowing amount $ 300,000          
Letter of Credit | Secured Debt | Credit Agreement Due on January 30, 2020            
Debt Instrument [Line Items]            
Asset based senior revolving credit facility           $ 15,000,000
Line of Credit | Unsecured Debt | Swiss subsidiary            
Debt Instrument [Line Items]            
Number of European banks guaranteed obligations to third parties | Bank 3 3   2 2  
Number of foreign subsidiaries under guaranteed obligation | Subsidiary 2 2   2 2  
Guaranteed obligations to third parties $ 1,200,000     $ 1,000,000    
Restricted deposit relates to lease agreement $ 600,000