SHAREHOLDERS' EQUITY , WARRANT ACTIVITY (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2022
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			1,882,518
Adjustments to Additional Paid in Capital, Warrant Issued	$ 8
US Treasury CARES Act Loan [Member]
Class of Warrant or Right [Line Items]
Adjustments to Additional Paid in Capital, Warrant Issued		$ 30
PSP 1 Warrants
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			928,127
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 31.61
US Treasury CARES Act Loan [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			427,080
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 31.61
PSP 2 Warrants
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			305,499
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 52.25
PSP 3 Warrants
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			221,812
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 66.39
CARES Act PSP [Domain]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding			1,455,438