SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)		12 Months Ended
	Jun. 10, 2019 USD ($) shares	Mar. 31, 2022 USD ($) segment shares	Mar. 31, 2021 USD ($)	Feb. 28, 2022	Jan. 24, 2022 USD ($)	Aug. 31, 2021 shares	May 14, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle
Number of reportable segments | segment		4
Goodwill		$ 10,126,000	$ 4,227,000
Warrants outstanding and exercisable (in shares) | shares		5,300,000
Passthrough cost		$ 23,000,000	19,900,000
Employee retention credit receivable		9,138,000	0		$ 9,100,000
Fair Value, Inputs, Level 3
New Accounting Pronouncements or Change in Accounting Principle
Fair value of redeemable non-controlling interest		$ 7,178,000	$ 6,598,000
Parent Company
New Accounting Pronouncements or Change in Accounting Principle
Minimum debt service coverage ratio		1.25
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		$ 5,900,000
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
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				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
Air T Funding | Trust Preferred Capital Security
New Accounting Pronouncements or Change in Accounting Principle
Stock issued during period	$ 4,000,000
Stock issued during period (in shares) | shares	1,600,000
Contrail Debt
New Accounting Pronouncements or Change in Accounting Principle
Minimum debt service coverage ratio		1.25
Minimum tangible net worth		$ 8,000,000
Contrail R N C I | Fair Value, Inputs, Level 3
New Accounting Pronouncements or Change in Accounting Principle
Fair value of redeemable non-controlling interest		7,200,000
Shanwick
New Accounting Pronouncements or Change in Accounting Principle
Fair value of redeemable non-controlling interest		$ 3,600,000
Third Party | Shanwick
New Accounting Pronouncements or Change in Accounting Principle
Ownership interest in subsidiary				30.00%
Warrant | Air T Funding
New Accounting Pronouncements or Change in Accounting Principle
Stock issued during period	$ 21,000,000
Stock issued during period (in shares) | shares	8,400,000