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Note 9 - Pensions and Other Postretirement Benefits - Amounts Recognized in the Company's Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Plan assets at beginning of year | $ 50,649 |  |
Plan assets at end of year | 55,130 | $ 50,649 |
Plan assets at beginning of year | 50,649 |  |
Plan assets at end of year | 55,130 | 50,649 |
Plan assets at beginning of year | 50,649 |  |
Plan assets at end of year | 55,130 | 50,649 |
Pension Plan [Member] |  |  |
Accumulated benefit obligation at end of year | 49,918 | 50,114 |
Current liabilities | 0 |  |
Benefit obligation at beginning of year | 62,149 |  |
Plan assets at beginning of year | 50,649 | 46,600 |
Actual return on plan assets | 2,586 |  |
Employer contributions | 5,089 | 2,250 |
Benefits paid | (2,589) | (1,646) |
Settlement Payments | (455) | 0 |
Actual expenses | (150) | (161) |
Plan assets at end of year | 55,130 | 50,649 | $ 46,600
Funded status at end of year | (6,629) | (11,500) |
Noncurrent liabilities | (6,629) | (11,500) |
Service cost | 1,998 | 2,180 | 2,400
Total assets (liabilities) | (6,629) | (11,500) |
Interest cost | 2,737 | 2,652 | 2,326
Net actuarial loss |  | 19,084 |
Plan Changes | 0 | 0 |
Deferred tax (benefit) expense | (4,202) | (4,803) |
Settlement | (1) | 0 |
After tax actuarial loss | 12,357 | 14,281 |
Benefits paid | (2,589) | (1,646) |
Settlement Payments | (455) | 0 |
Effect of foreign exchange | 0 | 0 |
Actual expenses | (150) | (161) |
Actuarial (gain)/ loss | (1,930) | 3,194 |
Benefit obligation at end of year | 61,759 | 62,149 |
Plan assets at beginning of year | 50,649 | 46,600 |
Actual return on plan assets | 2,586 |  |
Employer contributions | 5,089 | 2,250 |
Benefits paid | (2,589) | (1,646) |
Settlement Payments | (455) | 0 |
Actual expenses | (150) | (161) |
Plan assets at end of year | 55,130 | 50,649 | 46,600
Funded status at end of year | (6,629) | (11,500) |
Change in plan assets: | 61,759 | 62,149 |
Plan assets at beginning of year | 50,649 | 46,600 |
Actual return on plan assets | 2,586 |  |
Employer contributions | 5,089 | 2,250 |
Benefits paid | (2,589) | (1,646) |
Settlement Payments | (455) | 0 |
Actual expenses | (150) | (161) |
Plan assets at end of year | 55,130 | 50,649 | 46,600
Funded status at end of year | (6,629) | (11,500) |
Postemployment Retirement Benefits [Member] |  |  |
Accumulated benefit obligation at end of year | 23,758 | 24,276 |
Current liabilities | (1,580) |  |
Benefit obligation at beginning of year | 24,276 |  |
Plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 2,084 | 1,796 |
Benefits paid | (2,084) | (1,796) |
Settlement Payments | 0 | 0 |
Actual expenses | 0 | 0 |
Plan assets at end of year | 0 | 0 | 0
Funded status at end of year | (23,758) | (24,276) |
Noncurrent liabilities | (22,178) | (22,786) |
Service cost | 851 | 835 | 1,146
Total assets (liabilities) | (23,758) | (24,276) |
Interest cost | 1,123 | 1,196 | 760
Net actuarial loss |  | (236) |
Plan Changes | (394) | 0 |
Deferred tax (benefit) expense | 19 | 135 |
Settlement | 0 | 0 |
After tax actuarial loss | 271 | (101) |
Benefits paid | (2,084) | (1,796) |
Settlement Payments | 0 | 0 |
Effect of foreign exchange | (23) | 6 |
Actual expenses | 0 | 0 |
Actuarial (gain)/ loss |  | 81 |
Benefit obligation at end of year | 23,758 | 24,276 |
Plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 2,084 | 1,796 |
Benefits paid | (2,084) | (1,796) |
Settlement Payments | 0 | 0 |
Actual expenses | 0 | 0 |
Plan assets at end of year | 0 | 0 | 0
Funded status at end of year | (23,758) | (24,276) |
Change in plan assets: | 23,758 | 24,276 |
Plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 2,084 | 1,796 |
Benefits paid | (2,084) | (1,796) |
Settlement Payments | 0 | 0 |
Actual expenses | 0 | 0 |
Plan assets at end of year | 0 | 0 | $ 0
Funded status at end of year | $ (23,758) | $ (24,276) |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References 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 (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(10) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References 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)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References 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)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References 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 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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