Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2017
Dec. 31, 2016
Condensed 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 56,918,043 55,642,686
Common stock, shares outstanding 44,213,751 43,240,567
Treasury stock, shares 12,704,292 12,402,119