Note 8 - Lease Obligations - Lease Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Amortization of right-of-use assets	$ 528	$ 885	$ 1,848	$ 2,806
Interest on lease liabilities	92	159	314	493
Operating lease cost	7,946	6,280	20,593	18,044
Variable lease cost	39	8	148	99
Total lease cost	8,605	7,332	22,903	21,442
Operating cash flows from finance leases	92	159	314	493
Operating cash flows from operating leases	7,985	6,288	20,741	18,143
Financing cash flows from finance leases	528	885	1,848	2,806
Right-of-use assets obtained in exchange for new finance lease liabilities	0	0	458	0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 3,154	$ 13,265	$ 20,206	$ 15,795
Weighted-average remaining lease term—finance leases (in years) (Year)	1 year 3 months 18 days		1 year 3 months 18 days
Weighted-average remaining lease term—operating leases (in years) (Year)	4 years 10 months 24 days		4 years 10 months 24 days
Weighted-average discount rate—finance leases	5.80%		5.80%
Weighted-average discount rate—operating leases	9.50%		9.50%