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Note 7 - Operating Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Operating lease cost $ 188 $ 172 $ 564 $ 508
Variable lease cost 25 18 57 54
Total lease cost $ 213 $ 190 $ 621 $ 562