v3.2.0.727
Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Class A Common Stock [Member]      
Common Stock, Par or Stated Value Per Share $ 0.0003 $ 0.0003 $ 0.0003
Common Stock, Shares Authorized 400,000,000 400,000,000 400,000,000
Shares issued   177,295,988 174,528,423
Shares outstanding   177,295,988 174,528,423
Class B Convertible Common Stock [Member]      
Common Stock, Par or Stated Value Per Share $ 0.0003 $ 0.0003 $ 0.0003
Common Stock, Shares Authorized   36,600,000 38,750,000
Shares issued   36,600,000 38,750,000
Shares outstanding   36,600,000 38,750,000
Common Class C [Member]      
Common Stock, Par or Stated Value Per Share $ 0.0003 $ 0.0003 $ 0.0003
Common Stock, Shares Authorized 400,000,000 400,000,000 400,000,000
Shares issued 0 0 0
Shares outstanding 0 0 0