Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.2.0.727
Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2015
Dec. 31, 2014
Stockholders' equity    
Preferred stock, par value (in dollar per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 200,000,000 200,000,000
Common stock, shares issued (in shares) 124,812,343 124,274,864
Common stock, shares outstanding (in shares) 119,087,944 118,433,416
Treasury stock, at cost (in shares) 5,724,399 5,841,448