STOCK-BASED COMPENSATION (Details 2) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options Activity [Rollforward]
Outstanding at beginning of year (in shares)	7,210,551
Granted (in shares)	2,663,100	1,578,200	927,000
Exercised (in shares)	(190,295)
Canceled (in shares)	(555,981)
Outstanding at end of year (in shares)	9,127,375	7,210,551
Option Price, outstanding, beginning of period, minimum (in dollars per share)		$ 13.14
Option price, outstanding, beginning of period, maximum (in dollars per share)	$ 32.94
Option price, granted, minimum (in dollars per share)	17.33
Option price, granted, maximum (in dollars per share)	17.33
Option price, exercised, minimum (in dollars per share)	13.14
Option price exercised, maximum (in dollars per share)	18.78
Option price, canceled, minimum (in dollars per share)	13.14
Option price, canceled, maximum (in dollars per share)	32.94
Option price, outstanding, minimum, end of period (in dollars per share)	13.14
Option price, outstanding, maximum, end of period (in dollars per share)	32.94
Weighted average option price, beginning of period (in dollars per share)	24.95
Weighted-average exercise price (in dollars)	17.33	26.26	$ 32.94
Weighted average option price, exercised (in dollars per share)	17.42
Weighted average option price, canceled (in dollars per share)	22.03
Weighted average option price, outstanding, end of period (in dollars per share)	$ 23.06	$ 24.95
Options exercisable, beginning of period (in shares)	4,648,574
Options exercisable, end of period (in shares)	5,671,371	4,648,574
Weighted average exercise price, exercisable, beginning of period (in dollars per share)	$ 23.07
Weighted average exercise price, exercisable, end of period (in dollars per share)	$ 24.57	$ 23.07