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Note 5 - Leases (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Lease, Cost [Table Text Block]
   
September 30,
2020
 
Right-of-use operating lease assets, net
  $
765,000
 
Current lease liability
   
147,000
 
Non-current lease liability
   
648,000
 
         
Weighted average remaining lease term
   
3.7
 
Discount rate
   
22
%
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
2020 (remaining)
  $
76,000
 
2021
   
310,000
 
2022
   
319,000
 
2023
   
328,000
 
2024
   
139,000
 
Thereafter
   
--
 
Total lease payments
  $
1,172,000
 
Less: imputed interest
   
(377,000
)
Present value of operating lease liabilities
  $
795,000