Stock-based Awards (Details - Options) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Additional disclosure
Stock-based compensation expense	$ 6,846	$ 5,900	$ 12,753	$ 11,792
Options
Number of Options
Outstanding at the beginning of period (in shares)			24,541,512
Granted (in shares)			4,661,639
Exercised (in shares)			(9,596,374)
Canceled/forfeited (in shares)			(620,931)
Outstanding at the end of the period (in shares)	18,985,846		18,985,846		24,541,512
Weighted-Average Exercise Price
Outstanding at the beginning of period (in dollars per share)			$ 8.29
Granted (in dollars per share)			18.47
Exercised (in dollars per share)			5.80
Canceled/forfeited (in dollars per share)			8.13
Outstanding at the end of the period (in dollars per share)	$ 12.06		$ 12.06		$ 8.29
Additional disclosure
Weighted average remaining contractual life (in years)			7 years 8 months 27 days		5 years 5 months 27 days
Remaining stock-based compensation expense for unvested awards	$ 65,000		$ 65,000
Weighted average period over which remaining stock based compensation expense for unvested awards is expected to be recognized			3 years 5 months 1 day
Stock-based compensation expense	$ 3,700	$ 3,700	$ 7,000	$ 7,500