Equity Method Investments - Summarized Unaudited Financial Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income attributable to Air T, Inc. stockholders	$ (34,000)	$ 160,000	$ (355,000)	$ 170,000
Insignia
Revenue			5,842,000	8,245,000
Gross Profit			1,465,000	3,005,000
Operating income (loss)			(683,000)	253,000
Net income (loss)			(488,000)	184,000
Net income attributable to Air T, Inc. stockholders	$ (142,196)		$ (166,000)	$ 31,000