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Debt (Details) (USD $)
 3 Months Ended 3 Months Ended 3 Months Ended
Apr. 30, 2013
Apr. 30, 2013
Accounts receivable
Apr. 30, 2013
Inventory
Apr. 30, 2013
Maximum
Apr. 30, 2013
Maximum
Accounts receivable
Apr. 30, 2013
Minimum
Apr. 30, 2013
P.N.C
Revolving Credit Facility
Jul. 14, 2012
P.N.C
Revolving Credit Facility
Amendment No. 1 to the Credit Agreement
Dec. 22, 2011
P.N.C
Revolving Credit Facility
Credit Agreement
Jul. 27, 2012
P.N.C
Revolving Credit Facility
Amendment No. 2 to the Credit Agreement
Apr. 30, 2013
London Interbank Offered Rate L.I.B.O.R
Alternate Base Rate loans
Maximum
Apr. 30, 2013
London Interbank Offered Rate L.I.B.O.R
Alternate Base Rate loans
Minimum
Apr. 30, 2013
Eurodollar
Maximum
Apr. 30, 2013
Eurodollar
Minimum
Line of Credit Facility [Line Items]                            
Line of Credit Facility, Increase in Borrowing Capacity               $ 3,000,000            
Debt (Textual) [Abstract]                            
Revolving Credit Facility borrowing base limitation   85.00% 60.00%   85.00%                  
Revolving Credit Facility, range 60,000,000     14,000,000   4,000,000                
Revolving Credit Facility bears interest, range                     1.75% 0.75% 2.75% 1.75%
Line of Credit Facility, Covenant, Minimum EBITDA                 1,600,000 300,000        
Line of Credit Facility, Remaining Borrowing Capacity             8,342,000              
Debt (Additional Textual) [Abstract]                            
Sub-limit for issuances of letters of credit 3,000,000                          
Revolving Credit Facility bears interest increased 2.00%                          
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