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Note 4 - Leases (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Lease, Cost [Table Text Block]
   
March 31, 2019 (Unaudited)
 
weighted average remaining lease term (years)
   
7.99
 
weighted average discount rates
   
3.95
%
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
The reminder of 2019
  $
1,338
 
2020
   
1,733
 
2021
   
1,365
 
2022
   
1,164
 
2023
   
1,086
 
2024 and thereafter
   
4,140
 
Total undiscounted cash flows
   
10,826
 
Less imputed interest
   
1,626
 
Present value of lease liabilities
  $
9,200