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Note P - Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Lessee, Operating Lease, Costs, Assets and Liabilities [Table Text Block]
   
Year ended
December 31,
2020
    
Year ended
December 31,
2019
  
                 
Lease cost
  
 
 
 
  
 
 
 
Operating lease cost
   $
239,192
     $
186,246
  
Short-term lease cost
    
-
      
41,535
  
Total lease cost
   $
239,192
     $
227,781
  
                 
Balance sheet information
    
 
 
 
Operating right-of-use assets
   $
487,325
     $
566,479
  
                 
Operating lease liabilities, current portion
   $
234,309
     $
170,560
  
Operating lease liabilities, non-current portion
    
264,163
      
390,466
  
Total operating lease liabilities
   $
498,472
     $
561,026
  
                 
Weighted average remaining lease term (in years) – operating leases
    
2.26
      
3.33
  
Weighted average discount rate – operating leases
    
5.50
%
    
5.50
%
Lessee, Operating Lease, Supplemental Cash Flow Information [Table Text Block]
Cash paid for amounts included in the measurement of operating lease liabilities
   $
235,186
     $
179,105
  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
2021
   $
256,977
  
2022
    
187,594
  
2023
    
89,225
  
Total future lease payments
   $
533,796
  
Less: imputed interest
    
(35,324
)
Total
   $
498,472