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Note 6 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Operating lease cost $ 1,741 $ 1,778 $ 3,415 $ 3,555
Finance lease cost:        
Amortization of right-of-use assets 212 60 424 120
Interest on lease liabilities 26 12 53 26
Total finance lease cost $ 238 $ 72 $ 477 $ 146