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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended
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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 |

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