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Note 6 - Equity Method Investments (Tables)
12 Months Ended
Mar. 31, 2019
Notes Tables  
Equity Method Investments [Table Text Block]
   
Twelve Months Ended
   
Twelve Months Ended
 
   
December 31, 2018
   
December 31, 2017
 
Revenue
  $
33,236,000
    $
26,430,000
 
Gross Profit
   
12,561,000
     
8,401,000
 
Operating income (loss)
   
1,832,000
     
(908,000
)
Net income (loss)
   
1,399,000
     
(639,000
)
Net income attributable to Air T, Inc. stockholders
  $
391,000
    $
-