Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Consolidated Balance Sheets    
Preferred stock, par value (in dollars per share) $ 0.005 $ 0.005
Preferred stock, shares authorized 50,000,000 50,000,000
Common stock, par value (in dollars per share) $ 0.005 $ 0.005
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 45,628,814 44,071,564
Common stock, shares outstanding 33,876,020 32,355,675
Treasury stock, shares 11,752,794 11,715,889