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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Summary Of Significant Accounting Policies [Line Items]    
Highly liquid investments with an original maturity 90 days or less  
Cash of held in foreign bank accounts $ 2,544,000 $ 1,157,000
Depreciation expense 1,279,000 1,331,000
Net foreign exchange losses 190,000 158,000
Advertising expense 1,236,000 750,000
Total reimbursement 201,000 313,000
Estimated outstanding reimbursements 75,000 100,000
Impairment charges for intangible assets 0 0
Number of common equivalent shares 126,800 583,512
Compensation expenses is recognized for option forfeited 0  
Grass Technologies Product Group [Member]
    
Summary Of Significant Accounting Policies [Line Items]    
Gain on sale of assets of discontinued operations   $ 779,000
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  
Building and Improvements [Member] | Maximum [Member]
    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 45 years  
Building 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