CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts receivable, allowances
Accounts receivable, allowances (in dollars)	$ 741	$ 1,827
Common stock
Common stock, par value (in dollars per share)	$ 0.000005	$ 0.000005
Common stock, authorized shares	900,000,000	900,000,000
Common stock, issued shares	0	0
Common stock, outstanding shares	0	0
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, Authorized shares	100,000,000	100,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Treasury stock
Treasury stock shares	0	11,109,285
Common Class A
Common stock
Common stock, par value (in dollars per share)	$ 0.000005	$ 0.000005
Common stock, authorized shares	750,000,000	750,000,000
Common stock, issued shares	47,032,571	11,109,285
Common stock, outstanding shares	47,032,571	11,109,285
Common Class B
Common stock
Common stock, par value (in dollars per share)	$ 0.000005	$ 0.000005
Common stock, authorized shares	150,000,000	150,000,000
Common stock, issued shares	103,615,293	122,257,145
Common stock, outstanding shares	103,615,293	122,257,145