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Note 6 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Operating lease cost $ 1,778 $ 1,767 $ 3,555 $ 3,526
Finance lease cost:        
Amortization of right-of-use assets 60 13 120 18
Interest on lease liabilities 12 6 26 9
Total finance lease cost $ 72 $ 19 $ 146 $ 27