Net Earnings Per Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (Loss) Income from Continuing Operations	$ (956)	$ 3,995
Net loss from continuing operations	(841)	1,783
Net loss (income) from continuing operations attributable to non-controlling interests	115	(2,373)
Net (loss) income from continuing operations attributable to Air T, Inc. Stockholders	$ (841)	$ 1,622
(Loss) income from continuing operations per share:
Basic (in dollars per share)	$ (0.29)	$ 0.72
Diluted (in dollars per share)	$ (0.29)	$ 0.72
Antidilutive securities excluded from computation of (loss) income per share (in dollar per share)	5	0
Income from discontinued operations attributable to Air T, Inc. stockholders	$ 0	$ 161
Income from discontinued operations per share:
Basic (in dollars per share)	$ 0	$ 0.07
Diluted (in dollars per share)	0	0.07
(Loss) Income per share (Note 6)
Basic (in dollars per share)	(0.29)	0.79
Diluted (in dollars per share)	$ (0.29)	$ 0.79
Weighted Average Shares Outstanding:
Basic (in shares)	2,882	2,253
Diluted (in shares)	2,882	2,257
Continuing Operations
(Loss) income from continuing operations per share:
Antidilutive securities excluded from computation of (loss) income per share (in dollar per share)	5	0