Debt (Narrative) (Details)	3 Months Ended
Apr. 30, 2016 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End	4.00%
Annual Limit	$ 1,300,000
Provision to reduce borrowings under the line	$ 6,000,000
Provision to reduce borrowings under the line, period	60 days
PNC [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity	$ 8,860,000
PNC [Member] \| Revolving Credit Facility [Member] \| Amendment No. 7 To The Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 49,750,000
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%

The effective interest rate at the end of the reporting period.

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

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+ References

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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.

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- Definition

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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).

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Debt Instrument, Covenant Compliance, Annual Limit on Issued Dividends and Capital Stock Payments

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- Definition

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Provision to requires reduce borrowings under line of credit facility.

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