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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 4,779,460 4,779,460
Preferred stock, shares outstanding 4,779,460 4,779,460
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 73,586,529 73,411,279
Common stock, shares outstanding 73,586,529 73,411,279
Treasury Stock, shares 5,570,000 3,750,000