Note 9 - Employee Retirement Plans - Allocation of Plan Assets (Details) - UNITED STATES	Dec. 31, 2023	Dec. 31, 2022
Target Allocation	100.00%
Weighted Average Allocation		100.00%
Defined Benefit Plan, Cash [Member]
Target Allocation	3.00%
Weighted Average Allocation		3.00%
Defined Benefit Plan, Debt Security [Member]
Target Allocation	33.00%
Weighted Average Allocation		28.00%
Defined Benefit Plan, Equity Securities [Member]
Target Allocation	64.00%
Weighted Average Allocation		69.00%

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

Name:	us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant