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Note 8 - Lease Obligations - Lease Obligations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Amortization of right-of-use assets $ 688 $ 1,007
Interest on lease liabilities 124 174
Operating lease cost 5,437 5,935
Variable lease cost 22 39
Total lease cost 6,271 7,155
Operating cash flows from finance leases 124 174
Operating cash flows from operating leases 5,459 5,974
Financing cash flows from finance leases 1,293 633
Right-of-use assets obtained in exchange for new finance lease liabilities 458 0
Right-of-use assets obtained in exchange for new operating lease liabilities $ 53 $ 224
Weighted-average remaining lease term—finance leases (in years) (Year) 1 year 3 months 18 days  
Weighted-average remaining lease term—operating leases (in years) (Year) 5 years 2 months 12 days  
Weighted-average discount rate—finance leases 5.60%  
Weighted-average discount rate—operating leases 6.90%