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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 |  |  |

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