DEBT - Long-term Debt (Details) - Notes payable	1 Months Ended	9 Months Ended
	Dec. 31, 2019 USD ($) aircraft	Sep. 30, 2022 USD ($) aircraft	Mar. 31, 2022 USD ($) aircraft
Notes payable under the Company's 2019-1 EETC agreement
DEBT
Face amount | $	$ 248,587,000
Number of used aircrafts purchased or refinanced	13
Notes payable under the Company's 2022-1 EETC agreement
DEBT
Face amount | $			$ 188,277,000
Number of aircraft financed by debt			13
Debt issuance costs | $		$ 2,526,000
Number of aircraft owned and refinanced		5
Number of aircraft owned		2
Number of aircraft acquired in current period		4
Number of aircraft bought-out from an existing finance lease		2
Appraised value | $		$ 259,688,000
Interest expense capitalized | $		$ 2,327,000