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Note 3 - Leases (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
2021
  $
415,422
 
2022
   
563,818
 
2023
   
495,565
 
2024
   
458,787
 
2025
   
353,990
 
Thereafter
   
1,115,689
 
Total minimum lease payments
   
3,403,271
 
Less imputed interest
   
(481,527
)
Total lease liabilities
  $
2,921,744