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Note 4 - Leases (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Lease, Cost [Table Text Block]
   
June 30, 2019
(Unaudited)
 
weighted average remaining lease term (years)
   
8.25
 
weighted average discount rates
   
3.79
%
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
The remainder of 2019
  $
945
 
2020
   
1,778
 
2021
   
1,405
 
2022
   
1,203
 
2023
   
1,124
 
2024 and thereafter
   
4,550
 
Total undiscounted cash flows
   
11,005
 
Less imputed interest
   
1,560
 
Present value of lease liabilities
  $
9,445