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Debt (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Jan. 31, 2017 USD ($) | Dec. 22, 2011 USD ($)
Line of Credit Facility [Line Items] |  |
Line of credit facility, maximum borrowing capacity | $ 2,500,000 |
Revolving credit facility | 49,500,000 |
Sub-limit for issuances of letters of credit | $ 3,000,000 |
Revolving Credit Facility bears interest increased | 2.00% |
Debt Covenant, Maximum Annual Dividends And Stock Repurchases | $ 1,300,000 |
Maximum fixed charge coverage ratio | 5.85 |
Debt Instrument, Covenant, Achieved EBITDA | $ 11,578,000 |
Provision to reduce borrowings under the line | $ 6,000,000 |
Provision to reduce borrowings under the line, period | 30 days |
Judgments or judicial actions against the borrowers in excess | $ 250,000 |
Accounts receivable [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility borrowing base limitation | 85.00% |
Inventory [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility borrowing base limitation | 60.00% |
Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility | $ 8,000,000 |
Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility | $ 14,000,000 |
Maximum [Member] | Accounts receivable [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility borrowing base limitation | 85.00% |
Credit Agreement [Member] |  |
Line of Credit Facility [Line Items] |  |
Minimum EBITDA | $ 7,304,000 |
Maximum fixed charge coverage ratio | 1.10 |
Revolving Credit Facility [Member] | Credit Agreement [Member] |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, maximum borrowing capacity |  | $ 49,500,000
Revolving Credit Facility [Member] | Equipment Line [Member] |  |
Line of Credit Facility [Line Items] |  |
Sub-limit for issuances of letters of credit | $ 2,500,000 |
PNC [Member] | Revolving Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Remaining borrowing capacity | $ 22,015,000 |
Eurodollar [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility bears interest range of | 1.50% |
Eurodollar [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility bears interest range of | 2.50% |
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility bears interest range of | 0.50% |
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility bears interest range of | 1.50% |

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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 + 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 + 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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