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Note 13 - Leases (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   
March 31,
 
   
2021
 
Remaining nine months of 2021
  $
747,000
 
2022
   
1,010,000
 
2023
   
1,017,000
 
2024
   
484,000
 
2025
   
365,000
 
Total future minimum lease payments
   
3,623,000
 
Less imputed interest
   
(256,000
)
Total Lease liabilities
  $
3,367,000