Summary of Business and Significant Accounting Policies (Correction of Immaterial Errors) (Details) (USD $)	12 Months Ended
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)	$ (944,000)

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.

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

Name:	us-gaap_RestatementOfPriorYearIncomeGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration