Note 8 - Lease Obligations - Lease Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Amortization of right-of-use assets	$ 632	$ 915	$ 1,320	$ 1,922
Interest on lease liabilities	98	159	222	333
Operating lease cost	7,210	5,853	12,647	11,764
Variable lease cost	88	28	109	91
Total lease cost	8,028	6,955	14,298	14,110
Operating cash flows from finance leases	98	159	222	333
Operating cash flows from operating leases	7,298	5,881	12,756	11,855
Financing cash flows from finance leases	3,002	848	4,295	1,481
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	$ 16,999	$ 2,305	$ 17,052	$ 2,530
Weighted-average remaining lease term—finance leases (in years) (Year)	1 year 4 months 24 days		1 year 4 months 24 days
Weighted-average remaining lease term—operating leases (in years) (Year)	5 years		5 years
Weighted-average discount rate—finance leases	5.50%		5.50%
Weighted-average discount rate—operating leases	9.40%		9.40%