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Note 8 - Leases - Leases Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Amortization of finance lease assets $ 186 $ 129
Interest on finance lease liabilities 68 26
Total finance lease costs 254 155
Operating lease cost 759 765
Short-term lease cost 196 132
Variable lease cost [1] 230 195
Sublease income (46) (45)
Total operating lease costs 1,139 1,047
Total lease cost 1,393 1,202
Operating cash outflow from operating leases $ 887 $ 888
Weighted-average remaining lease term-finance leases at end of period (in years) (Year) 1 year 328 days 1 year 73 days
Weighted-average remaining lease term-operating leases at end of period (in years) (Year) 9 years 182 days 10 years 182 days
Weighted-average discount rate-finance leases at end of period 9.00% 9.20%
Weighted-average discount rate-operating leases at end of period 8.50% 8.80%
[1] Variable lease costs consist primarily of taxes, insurance, utilities, and common area or other maintenance costs for the Company's leased facilities and equipment.