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Summary of Business and Significant Accounting Policies (Correction of Immaterial Errors) (Details) (USD $) | 12 Months Ended
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Jan. 31, 2014 | Jan. 31, 2013
Accounting Policies [Abstract] |  |
Impact of prior period immaterial error on net sales, gross margin and S,G&A expenses | $ (878,000)us-gaap_RestatementOfPriorYearIncomeGross | $ (944,000)us-gaap_RestatementOfPriorYearIncomeGross

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- Definition Resulting effect of restatement to correct an error, before tax effects, on the net income of prior periods for the year in which any adjustments are first made. In statements containing more than one period, discloses the effects for each period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22663-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22658-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22644-107794 + Details
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