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Lease Commitments - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Lease Commitments        
Amortization of right-of-use asset $ 68 $ 68 $ 136 $ 135
Interest expense 27 28 54 57
Operating lease cost 29 29 58 58
Total lease cost $ 124 $ 125 $ 248 $ 250