SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)		12 Months Ended
	Jun. 10, 2019 USD ($) shares	Mar. 31, 2023 USD ($) segment shares	Mar. 31, 2022 USD ($)	Feb. 28, 2022	May 14, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle
Number of reportable segments | segment		4
Goodwill		$ 10,563,000	$ 10,126,000
Passthrough cost		29,200,000	23,000,000
Fair Value, Inputs, Level 3
New Accounting Pronouncements or Change in Accounting Principle
Contrail's redeemable non-controlling interest (Level 3)		7,972,000	$ 7,178,000
Air T Funding | Warrant
New Accounting Pronouncements or Change in Accounting Principle
Stock issued during period (in shares) | shares	8,400,000
Stock issued during period	$ 21,000,000
Third Party | Shanwick
New Accounting Pronouncements or Change in Accounting Principle
Ownership interest in subsidiary				30.00%
Contrail R N C I | Fair Value, Inputs, Level 3
New Accounting Pronouncements or Change in Accounting Principle
Contrail's redeemable non-controlling interest (Level 3)		8,000,000
Shanwick
New Accounting Pronouncements or Change in Accounting Principle
Contrail's redeemable non-controlling interest (Level 3)		$ 4,700,000
Trust Preferred Capital Security
New Accounting Pronouncements or Change in Accounting Principle
Warrant exercised (in shares) | shares		5,300,000
Warrants outstanding and exercisable (in shares) | shares		3,100,000
Trust Preferred Capital Security | Market Offering Agreement
New Accounting Pronouncements or Change in Accounting Principle
Maximum aggregate offering price					$ 8,000,000
Trust Preferred Capital Security | Air T Funding
New Accounting Pronouncements or Change in Accounting Principle
Stock issued during period (in shares) | shares	1,600,000
Stock issued during period	$ 4,000,000
Computer Equipment
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment, useful life		3 years
Flight Equipment
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment, useful life		7 years
Deicers and Other Equipment
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment, useful life		10 years
Building
New Accounting Pronouncements or Change in Accounting Principle
Property, plant and equipment, useful life		30 years
Commercial jet engines and parts
New Accounting Pronouncements or Change in Accounting Principle
Goodwill		$ 4,200,000
Corporate and other
New Accounting Pronouncements or Change in Accounting Principle
Goodwill		6,300,000
Overnight air cargo:
New Accounting Pronouncements or Change in Accounting Principle
Goodwill		$ 100,000