Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Schedule of restricted stock activity

The following table summarizes the activities for our unvested restricted stock units (RSUs) for the three months ended March 31, 2017 (unaudited):

	Unvested Restricted Stock Units
	Number of Shares		Weighted- Average Grant-Date Fair Value
Unvested as of December 31, 2016	25,348,955		$	624.92
Granted	5,056,334		$	789.43
Vested	(2,958,139	)	$	593.45
Forfeited/canceled	(344,912	)	$	634.35
Unvested as of March 31, 2017	27,102,238		$	659.22