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Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Summary of Significant Accounting Policies (Textual) [Abstract]    
Highly liquid investments with an original maturity 90 days or less  
Cash of held in foreign bank accounts $ 1,157,000 $ 1,929,000
Depreciation expense 1,331,000 1,576,000
Net foreign exchange losses 158,000 27,000
Advertising expense 750,000 970,000
Total reimbursement 313,000 487,000
Estimated outstanding reimbursements 100,000 150,000
Number of common equivalent shares 583,512 664,690
Net unrealized gains on available for sale securities 7,000  
Net translation gains on foreign operations 166,000  
Compensation expenses is recognized for option forfeited 0  
Land improvements [Member] | Maximum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 20 years  
Land improvements [Member] | Minimum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Buildings and improvements [Member] | Maximum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 45 years  
Buildings and improvements [Member] | Minimum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Machinery and equipment [Member] | Maximum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Machinery and equipment [Member] | Minimum [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 3 years  
Grass Technologies Product Group [Member]
    
Summary of Significant Accounting Policies [Line Items]    
Gain on sale of assets of discontinued operations $ 779,000