Note 15 - Air T, Inc. Stockholders' Equity (Details Textual) - USD ($)		12 Months Ended
	Jul. 01, 2016	Mar. 31, 2017	Mar. 31, 2018	May 14, 2014
Common Stock, Shares Authorized		4,000,000	4,000,000
Common Stock, Par or Stated Value Per Share		$ 0.25	$ 0.25
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				750,000
Preferred Stock, Shares Authorized		50,000	50,000
Preferred Stock, Par or Stated Value Per Share		$ 1	$ 1
Stock Repurchased and Retired During Period, Value		$ 7,917,009
Securities Purchase Agreement [Member] | Biglari Group [Member]
Common Stock, Par or Stated Value Per Share	$ 0.25
Stock Repurchased and Retired During Period, Shares	329,738
Treasury Stock Acquired, Average Cost Per Share	$ 24.01
Stock Repurchased and Retired During Period, Value	$ 7,917,009
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized			5,000
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized			5,000
Preferred Stock, Capital Shares Reserved for Future Issuance			3,000