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Debt (Details) (USD $)
 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jul. 31, 2012
Jun. 15, 2012
Jul. 31, 2012
Accounts receivable [Member]
Jul. 31, 2012
Maximum [Member]
Jul. 27, 2012
Maximum [Member]
Jul. 31, 2012
Maximum [Member]
inventory [Member]
Jul. 31, 2012
Minimum [Member]
Jul. 27, 2012
Minimum [Member]
Jul. 31, 2012
Minimum [Member]
inventory [Member]
Jul. 31, 2012
Alternate Base Rate loans [Member]
Maximum [Member]
Jul. 31, 2012
Alternate Base Rate loans [Member]
Minimum [Member]
Jul. 31, 2012
Eurodollar Currency Rate loans [Member]
Maximum [Member]
Jul. 31, 2012
Eurodollar Currency Rate loans [Member]
Minimum [Member]
Debt (Textual) [Abstract]                          
Credit Agreement which reduced the minimum EBITDA financial covenant       $ 6,894,000 $ 1,600,000   $ 5,800,000 $ 300,000          
Revolving Credit Facility borrowing base limitation     85.00%     85.00%     60.00%        
Revolving Credit Facility, range 60,000,000     12,000,000     6,000,000            
Revolving Credit Facility bears interest, range                   1.75% 0.75% 2.75% 1.75%
Debt (Additional Textual) [Abstract]                          
Revolving Credit Facility, Amended   3,000,000                      
Revolving Credit and Security Agreement Dec. 22, 2011                        
Secured revolving line of credit 60,000,000     12,000,000     6,000,000            
Sub-limit for issuances of letters of credit 3,000,000                        
Revolving Credit Facility due date Dec. 22, 2014                        
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                        
Revolving Credit Facility $ 20,851,000