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Note 6 - Property and Equipment, Net (Tables)
 6 Months Ended
Aug. 31, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
August 31, 2020
    
February 29, 2020
  
Land
   $
513,618
     $
513,618
  
Building
    
5,031,395
      
5,031,395
  
Machinery and equipment
    
10,037,869
      
10,664,396
  
Furniture and fixtures
    
797,303
      
852,557
  
Leasehold improvements
    
985,407
      
1,154,396
  
Transportation equipment
    
429,789
      
440,989
  
     
17,795,381
      
18,657,351
  
                 
Less accumulated depreciation
    
(12,261,480
 )    
(12,719,338
 )
Property and equipment, net
   $
5,533,901
     $
5,938,013