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Debt (Narrative) (Details) (USD $) | 3 Months Ended | 6 Months Ended |  | 3 Months Ended |  |  |  | 0 Months Ended |  |  |  | 6 Months Ended |
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Jul. 31, 2014 | Jul. 31, 2014 | Jul. 31, 2014 Accounts receivable [Member] | Jul. 31, 2014 Inventory [Member] | Jul. 31, 2014 Minimum [Member] | Jul. 31, 2014 Maximum [Member] | Jul. 31, 2014 Maximum [Member] Accounts receivable [Member] | Jul. 31, 2014 Credit Agreement [Member] | Jul. 31, 2014 PNC [Member] Revolving Credit Facility [Member] | Jul. 14, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 1 to the Credit Agreement [Member] | Jun. 15, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 1 to the Credit Agreement [Member] | Jun. 14, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 1 to the Credit Agreement [Member] | Jul. 27, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 2 to the Credit Agreement [Member] | Apr. 15, 2014 PNC [Member] Revolving Credit Facility [Member] Amendment No. 7 To The Credit Agreement [Member] | Apr. 14, 2014 PNC [Member] Revolving Credit Facility [Member] Amendment No. 7 To The Credit Agreement [Member] | Jul. 31, 2014 PNC [Member] Revolving Credit Facility [Member] Credit Agreement [Member] | Dec. 22, 2011 PNC [Member] Revolving Credit Facility [Member] Credit Agreement [Member] | Jul. 31, 2014 Eurodollar [Member] Minimum [Member] | Jul. 31, 2014 Eurodollar [Member] Maximum [Member] | Jul. 31, 2014 Alternate Base Rate Loans [Member] London Interbank Offered Rate LIBOR [Member] Minimum [Member] | Jul. 31, 2014 Alternate Base Rate Loans [Member] London Interbank Offered Rate LIBOR [Member] Maximum [Member] | Jan. 31, 2015 Scenario, Forecast [Member] Credit Agreement [Member]
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase(Decrease) in borrowing capacity |  |  |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  | $ (10,000,000) |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | 9,000,000 | 6,000,000 |  | 50,000,000 | 60,000,000 |  |  |  |  |  |  |
Minimum EBITDA |  |  |  |  |  |  |  | 4,420,000 |  |  |  |  | 300,000 |  |  |  | 1,600,000 |  |  |  |  | 5,512,000
Revolving credit facility |  |  |  |  | 8,000,000 | 14,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sub-limit for issuances of letters of credit |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility borrowing base limitation |  |  | 85.00% | 60.00% |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility bears interest range of |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75% | 2.75% | 0.75% | 1.75% |
Revolving Credit Facility bears interest increased |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum tangible net worth covenant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 26,350,000 |  |  |  |  |  |
Minimum fixed charge coverage ratio |  |  |  |  |  |  |  | 1.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision to reduce borrowings under the line | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision to reduce borrowings under the line, period | 60 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Judgments or judicial actions against the borrowers in excess |  | 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining borrowing capacity |  |  |  |  |  |  |  |  | $ 18,360,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The percentage points added to the reference rate or index during the adjustment period to compute the variable [fully indexed] rate on the loans receivable realized during the reporting period. This may be an effective margin for the period depending on the specific terms of the underlying loan agreement (for example, an annual disclosure for a loan with a quarterly adjustment period). + References No definition available. + Details
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- Definition The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(a) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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