Stock Based Compensation (Details - RSUs) - RSUs |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
$ / shares
shares
| |
| Number of Shares Underlying Outstanding RSUs | |
| RSU Shares Outstanding, Beginning of Period | shares | 7,178,015 |
| RSUs granted, Shares | shares | 2,376,440 |
| RSUs vested, Shares | shares | (1,222,641) |
| RSUs forfeited, Shares | shares | (238,327) |
| RSU Shares Outstanding, End of Period | shares | 8,093,487 |
| Weighted-Average Grant-Date Fair Value per RSU | |
| Weighted Average Fair Value, Beginning of Period, USD per Share | $ / shares | $ 62.79 |
| Weighted Average Fair Value, RSUs Granted, USD per Share | $ / shares | 83.32 |
| Weighted Average Fair Value, RSUs Vested, USD per Share | $ / shares | 65.24 |
| Weighted Average Fair Value, RSUs Forfeited, USD per Share | $ / shares | 63.38 |
| Weighted Average Fair Value, End of Period, USD per Share | $ / shares | $ 68.43 |