Note 9 - Non-pension Post-retirement Benefits - Anticipated Benefit Payments (Details) - Non-Pension Post-retirement Benefit Plans [Member] $ in Thousands	Dec. 31, 2019 USD ($)
2020	$ 3,882
2021	3,795
2022	3,791
2023	3,687
2024	3,582
2025-2029	15,615
UNITED STATES
2020	3,768
2021	3,686
2022	3,688
2023	3,594
2024	3,498
2025-2029	15,370
Foreign Plan [Member]
2020	114
2021	109
2022	103
2023	93
2024	84
2025-2029	$ 245

Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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