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Note 3 - Property and Equipment
 12 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
3.
Property and Equipment
 
Property and equipment as shown on the accompanying Consolidated Balance Sheets is composed of the following as of
December 31, 2021
and
2020:
 
   
2021
    
2020
  
Equipment and furnishings
   $
591,554
     $
543,836
  
Leasehold improvements
    
115,605
      
115,605
  
Total property and equipment
    
707,159
      
659,441
  
Accumulated depreciation and amortization
    
(550,221
 )    
(511,700
 )
Property and equipment, net
   $
156,938
     $
147,741
  
 
Depreciation expense was
$38,521
and
$19,656
during the years ended
December 31, 2021
and
2020,
respectively.