Note 9 - Employee Retirement Plans - Allocation of Plan Assets (Details) - UNITED STATES	Dec. 31, 2022	Dec. 31, 2021
Target Allocation	100.00%
Weighted Average Allocation		100.00%
Defined Benefit Plan, Cash [Member]
Target Allocation	3.00%
Weighted Average Allocation		2.00%
Defined Benefit Plan, Debt Security [Member]
Target Allocation	28.00%
Weighted Average Allocation		34.00%
Defined Benefit Plan, Equity Securities [Member]
Target Allocation	69.00%
Weighted Average Allocation		64.00%

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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