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Note 13 - Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating lease costs $ 460 $ 170
Short-term lease costs 137 59
Total operating lease costs 597 229
Variable lease costs 128 79
Total lease expense $ 725 $ 308