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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Allowance for doubtful accounts receivable $ 483,722 $ 494,891
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, Authorized shares 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, Authorized shares 20,000,000 20,000,000
Common stock, issued shares 6,883,441 6,749,913
Common stock, outstanding shares 6,883,441 6,749,913