STOCK-BASED COMPENSATION (Details - P&L Impact) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Non-cash compensation expense related to equity awards
Total non-cash compensation	$ 14,161	$ 10,797	$ 39,236	$ 40,832
Cost of revenue
Non-cash compensation expense related to equity awards
Total non-cash compensation	372	208	947	558
Selling and marketing expense
Non-cash compensation expense related to equity awards
Total non-cash compensation	1,678	835	4,431	4,867
General and administrative expense
Non-cash compensation expense related to equity awards
Total non-cash compensation	10,356	8,627	29,208	30,534
Product development
Non-cash compensation expense related to equity awards
Total non-cash compensation	$ 1,755	$ 1,127	$ 4,650	$ 4,873