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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Accounts receivable, reserve for doubtful accounts $ 73,550 $ 40,644
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued    
Preferred stock, shares outstanding    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 80,000,000 80,000,000
Common stock, shares issued 32,902,987 32,774,374
Common stock, shares outstanding 32,902,987 32,774,374