Debt (Narrative) (Details)	6 Months Ended
	Jul. 31, 2016 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End	4.50%
Company restriction from issuing dividends or making payments with respect to the Company's Capital Stock to it's annual limit	$ 1,300,000
Provision to reduce borrowings under the line	$ 6,000,000
Provision to reduce borrowings under the line, period	30 days
PNC [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity	$ 25,252,000
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%