Note 12 - Pension and Postretirement Benefit Plans - Significant Weighted Average Assumptions Used in Measurement of Pension and Postretirement Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
UNITED STATES | Pension Plan [Member]
Benefit obligations:
Discount rate	5.19%	5.56%	5.12%
Net periodic benefit cost:
Discount rate	5.28%	5.07%	5.36%
Expected return on plan assets	6.00%	5.75%	6.00%
Foreign Plan [Member] | Pension Plan [Member]
Benefit obligations:
Discount rate	5.25%	4.71%	4.39%
Net periodic benefit cost:
Discount rate	4.96%	4.82%	5.13%
Rate of compensation increase	3.59%	3.59%	3.52%
Expected return on plan assets	7.25%	7.26%	6.90%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Benefit obligations:
Discount rate	4.73%	4.99%	5.01%
Net periodic benefit cost:
Discount rate	5.43%	5.32%	5.64%
Initial health care cost trend rate	2.94%	2.91%	2.76%
Ultimate health care cost trend rate	4.11%	4.17%	4.19%
Year ultimate reached	2032	2032	2032