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Discontinued Operations - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Deferred Financing Costs [Line Items]
Proceeds from sale		$ 16,800,000
Proceeds from sale held in escrow recognized	1,800,000
Impairment charge on assets related to discontinued operations		779,000
Grass Technologies Product Group [Member]
Deferred Financing Costs [Line Items]
Proceeds from sale		18,600,000
Proceeds from sale recognized		$ 16,800,000

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Proceeds from divestiture of businesses recognized during period.

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Proceeds from divestiture of business held in escrow recognized.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Section 45

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