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Note 9 - Leases - Lease Information and Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Right-of-use asset $ 1,844   $ 1,844   $ 1,998
Weighted average remaining lease term (in years) (Year) 6 years 5 months 1 day   6 years 5 months 1 day   6 years 9 months 21 days
Weighted average discount rate 3.04%   3.04%   3.04%
Operating lease expense $ 94 $ 92 $ 187 $ 185  
Short-term lease expense 0 0 1 1  
Total lease expense 94 92 188 186  
Cash paid for amounts included in lease liabilities 92 $ 91 184 $ 182  
Other Liabilities [Member]          
Lease liability $ 1,866   $ 1,866   $ 2,016