Note 7 - Net Earnings Per Share - Earnings Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Income (Loss) Attributable to Air T, Inc. Stockholders	$ (1,321,185)	$ 421,701	$ 1,507,509	$ 1,390,090
Basic (in dollars per share)	$ (0.65)	$ 0.21	$ 0.74	$ 0.68
Diluted (in dollars per share)	$ (0.65)	$ 0.21	$ 0.74	$ 0.68
Basic (in shares)	2,043,823	2,042,789	2,043,716	2,042,789
Diluted (in shares)	2,043,823	2,046,945	2,049,393	2,047,305