EARNINGS PER COMMON SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ 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	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net Income (Loss) from continuing operations	$ 5,086	$ (1,189)	$ 8,003	$ 327	$ (5,844)	$ 1,763	$ (3,357)	$ (956)	$ 12,227	$ (8,394)
Net (Income) Loss Attributable to Non-controlling Interests	(740)	(73)	(448)	(38)	230	335	433	115	(1,299)	1,113
Net income (loss) from continuing operations attributable to Air T, Inc. Stockholders	$ 4,346	$ (1,262)	$ 7,555	$ 289	$ (5,614)	$ 2,098	$ (2,924)	$ (841)	$ 10,928	$ (7,281)
Income (loss) from continuing operations per share:
Basic (in dollars per share)	$ 1.51	$ (0.44)	$ 2.62	$ 0.10	$ (1.96)	$ 0.73	$ (1.01)	$ (0.29)	$ 3.79	$ (2.53)
Diluted (in dollars per share)	$ 1.51	$ (0.44)	$ 2.60	$ 0.10	$ (1.96)	$ 0.73	$ (1.01)	$ (0.29)	$ 3.78	$ (2.53)
Antidilutive shares excluded from computation of income (loss) per share from continuing operations (in shares)	0	11,000	0	0	8,000	0	5,000	5,000	0	6,000
Gain on sale of discontinued operations, net of tax									$ 0	$ 4
Gain from discontinued operations attributable to Air T, Inc. stockholders					$ 0	$ 0	$ 4	$ 0	$ 0	$ 4
Income from discontinued operations per share:
Basic (in dollars per share)					$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Diluted (in dollars per share)					0	0	0	0	0	0
Income (loss) per share:
Basic (in dollars per share)					(1.96)	0.73	(1.01)	(0.29)	3.79	(2.53)
Diluted (in dollars per share)					$ (1.96)	$ 0.73	$ (1.01)	$ (0.29)	$ 3.78	$ (2.53)
Weighted Average Shares Outstanding:
Basic (in shares)									2,880,000	2,882,000
Diluted (in shares)									2,888,000	2,882,000
Continuing Operations
Income (loss) from continuing operations per share:
Antidilutive shares excluded from computation of income (loss) per share from continuing operations (in shares)					8,000	0	5,000	5,000	0	6,000
Discontinued Operations
Income (loss) from continuing operations per share:
Antidilutive shares excluded from computation of income (loss) per share from continuing operations (in shares)					0	0	0	0	0	0