CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts receivable, allowances
Accounts receivable, allowances (in dollars)	$ 1,022	$ 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
STOCKHOLDERS' EQUITY (DEFICIT)
Treasury stock shares	0	11,109,285
Class A Common
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	53,482,669	11,109,285
Common stock, outstanding shares	53,482,669	11,109,285
Class B Common
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	98,230,363	122,257,145
Common stock, outstanding shares	98,230,363	122,257,145