Note 2 - Supplemental Cash Flow Information (Tables)
 12 Months Ended
Feb. 29, 2020
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
 
  
2020
    
2019
    
2018
  
Cash paid for:                        
Interest
   $
20,610
     $
72,619
     $
123,008
  
Income taxes
    
619,276
      
638,252
      
2,431,884
  
Non-cash Operating Activities
                        
Accrued Inventory
    
191,459
      
52,918
      
258,247
  
Non-cash Financing Activities
                        
Dividend payable
   $
722,344
     $
714,939
     $
708,652