EQUITY METHOD INVESTMENTS - Schedule of Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments
Revenue	$ 51,438	$ 45,433	$ 43,238	$ 36,968	$ 46,728	$ 55,819	$ 35,604	$ 36,970	$ 177,077		$ 175,121
Operating loss									8,755		(9,175)
Net loss									10,928		(7,277)
Net loss attributable to Air T, Inc. stockholders									$ 37		$ (723)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments
Revenue										$ 115,051		$ 91,245
Gross Profit										5,642		4,589
Operating loss										(9,627)		(10,551)
Net loss										(7,473)		(1,960)
Net loss attributable to Air T, Inc. stockholders										$ (815)		$ (760)