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Debt (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Nov. 26, 2009
Debt (Textual) [Abstract]                
Revolving line of credit         $ 20,000,000      
Letters of credit sublimit included in line of credit         10,000,000      
Termination date of line of credit         Apr. 01, 2013      
Financial covenants which require compliance         Mar. 31, 2013      
Maximum capital expenditures financial covenant         2,500,000      
The minimum Fixed Charge Coverage Ratio         1.25%      
The maximum funded debt to EBITDA covenant         3.00%      
Excess in aggregate indebtedness         100,000      
Borrowing base limitation 10,800,000       10,800,000      
Interest rate for borrowing at LIBOR rate         3.50%      
Outstanding trade letters of credit 2,000,000       2,000,000      
Principal amount of subordinated convertible promissory notes               10,800,000
Convertible promissory notes issued to Chairman, director and Secretary               2,200,000
Convertible promissory notes issued to a company director               150,000
Convertible promissory notes issued to Secretary               800,000
Convertible promissory notes issued to Harvey Sandler Revocable Trust               800,000
Percentage of outstanding common stock with Harvey Sandler Revocable Trust         10.00%      
Interest accrues under the Investor Notes at the annual rate 6.00%       6.00%      
Interest paid on the investor notes 136,000     159,000 417,000 475,000    
Proceeds of the Investor Notes to repay all previously existing subordinated debt         4,500,000      
Accruing interest at rates, minimum         11.00%      
Accruing interest at rates, maximum         12.00%      
Fees paid for the issuance of this debt         320,000      
Conversion price of Investors Notes to Shares $ 4.00       $ 4.00      
Expected conversion price of Investor Notes after three years and five consecutive days $ 8.00       $ 8.00      
Outstanding balance of the Investor Notes 8,800,000       8,800,000   9,600,000  
Investor Notes was converted to shares, amount $ 400,000 $ 240,000 $ 200,000   $ 840,000 $ 700,000    
Investor Notes was converted to shares 100,000 60,000 50,000