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Note 8 - Income Taxes Concept (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
United States |  | $ | 34,763 |  |  | $ | 6,270 |  |  | $ | 30,973 |
Foreign countries |  |  | 9,198 |  |  |  | 7,602 |  |  |  | 6,275 |
Total |  | $ | 43,961 |  |  | $ | 13,872 |  |  | $ | 37,248 |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Current expense: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 6,735 |  |  | $ | 1,581 |  |  | $ | 5,174 |
Foreign |  |  | 1,591 |  |  |  | 1,264 |  |  |  | 1,087 |
State and local |  |  | 1,098 |  |  |  | 918 |  |  |  | 1,086 |
|  | $ | 9,424 |  |  | $ | 3,763 |  |  | $ | 7,347 |
Deferred expense (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | (206 | ) |  | $ | (565 | ) |  | $ | 60 |
Foreign |  |  | 196 |  |  |  | 147 |  |  |  | 48 |
State and local |  |  | (404 | ) |  |  | (668 | ) |  |  | (58 | )
|  |  | (414 | ) |  |  | (1,086 | ) |  |  | 50 |
Income tax expense |  | $ | 9,010 |  |  | $ | 2,677 |  |  | $ | 7,397 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Income taxes at statutory rate |  | $ | 9,232 |  |  | $ | 2,913 |  |  | $ | 7,822 |
State and local income taxes, net of federal tax benefit |  |  | 620 |  |  |  | 282 |  |  |  | 898 |
Tax credits |  |  | (1,208 | ) |  |  | (627 | ) |  |  | (1,052 | )
Uncertain tax positions |  |  | (34 | ) |  |  | (99 | ) |  |  | (26 | )
Valuation allowance |  |  | (72 | ) |  |  | (85 | ) |  |  | (86 | )
GILTI/FDII |  |  | 368 |  |  |  | 608 |  |  |  | 238 |
Foreign rate differential |  |  | (145 | ) |  |  | (186 | ) |  |  | (183 | )
Other |  |  | 249 |  |  |  | (129 | ) |  |  | (214 | )
Income tax expense |  | $ | 9,010 |  |  | $ | 2,677 |  |  | $ | 7,397 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2023 |  |  | 2022 |
Deferred tax assets: |  |  |  |  |  |  |  |
Inventories |  | $ | 520 |  |  | $ | 524 |
Accrued liabilities |  |  | 3,011 |  |  |  | 3,208 |
Postretirement health benefits obligation |  |  | 5,600 |  |  |  | 5,584 |
Pension |  |  | 2,386 |  |  |  | 1,868 |
Lease liabilities |  |  | 4,916 |  |  |  | 520 |
Capitalized R&D |  |  | 2,041 |  |  |  | 1,103 |
Interest |  |  | 8,703 |  |  |  | 3,168 |
Other |  |  | 1,155 |  |  |  | 1,399 |
Total deferred tax assets |  |  | 28,332 |  |  |  | 17,374 |
Valuation allowance |  |  | (390 | ) |  |  | (462 | )
Net deferred tax assets |  |  | 27,942 |  |  |  | 16,912 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | (22,923 | ) |  |  | (16,987 | )
Leases - right of use assets |  |  | (4,922 | ) |  |  | (536 | )
Total deferred tax liabilities |  |  | (27,845 | ) |  |  | (17,523 | )
Net deferred tax assets (liabilities) |  | $ | 97 |  |  | $ | (611 | )
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Balance at beginning of year |  | $ | 754 |  |  | $ | 808 |  |  | $ | 878 |
Additions based on tax positions related to the current year |  |  | 180 |  |  |  | 117 |  |  |  | 153 |
Reductions due to lapse of applicable statute of limitations |  |  | (230 | ) |  |  | (171 | ) |  |  | (96 | )
Settlements |  |  | - |  |  |  | - |  |  |  | (127 | )
Balance at end of year |  | $ | 704 |  |  | $ | 754 |  |  | $ | 808 |

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