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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Stockholders’ equity:    
Preferred stock Series A-2, convertible, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock Series A-2, stated value $ 7,500 $ 7,500
Preferred stock Series A-2, shares authorized 7,500 7,500
Preferred stock Series A-2, shares issued 53 53
Preferred stock Series A-2, shares outstanding 53 53
Preferred stock Series A-2, liquidation value $ 396,000 $ 396,000
Common stock, convertible, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 35,830,000 35,951,000
Common stock, shares outstanding 35,651,000 35,911,000
Treasury stock, shares 179,000 40,000