Note 16 - Pension and Other Benefits (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2014
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	$ 331	$ 0	$ (81)
The 401(k) Plan [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match				100.00%	50.00%
Defined Benefit Plan, Plan Assets, Contributions by Employer	2,200	1,600	1,600
Pension Plan [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	9,300	14,600
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	300
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	0
Supplemental Employee Retirement Plan [Member]
Pension Cost (Reversal of Cost)	$ 1,400	$ 1,000	$ 400