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Note 8 - Leases - Lease Expense and Other Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Amortization of ROU Assets $ 37
Interest on finance lease liabilities 7
Finance lease expense 44
Operating lease expense 574 522
Short-term lease expense 2
Variable lease expense 63 52
Total lease expense $ 681 $ 576
Operating leases (Year) 16 years 146 days 17 years 219 days
Financing leases (Year) 3 years 292 days
Operating leases 4.10% 4.10%
Financing leases 5.10%
Right-of-use assets obtained in exchange for operating lease liabilities as of January 1, 2019 $ 544 $ 497
Operating cash flows from financing leases $ 51