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Note 7 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Loss Reported in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Balances | $ 349,459 | $ 331,194 | $ 329,976
Balance at December 31, 2020 | 373,800 | 349,459 | 331,194
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |
Balances | (9,688) | (10,619) | (7,851)
Reclassification adjustments | 0 | 0 | 0
Reclassification adjustments | 0 | 0 | 0
Current period benefit (charge) | 3,024 | (931) | (2,768)
Current period benefit (charge) | (3,024) | 931 | 2,768
Income tax benefit | 0 | 0 | 0
Income tax benefit | 0 | 0 | (0)
Balance at December 31, 2020 | (12,712) | (9,688) | (10,619)
Reclassification adjustments | 0 | 0 | (0)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |
Balances | (1,069) | (617) | 0
Reclassification adjustments | 1,791 | 1,630 | (43)
Reclassification adjustments | 1,791 | 1,630 | (43)
Current period benefit (charge) | (3,058) | (1,039) | 766
Current period benefit (charge) | 3,058 | 1,039 | (766)
Income tax benefit | 301 | (139) | (192)
Income tax benefit | (301) | 139 | 192
Balance at December 31, 2020 | (103) | (1,069) | (617)
Reclassification adjustments | (1,791) | (1,630) | 43
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balances | (14,180) | (13,238) | (22,479)
Reclassification adjustments | (1,424) | (1,423) | 8,519
Reclassification adjustments | (1,424) | (1,423) | 8,519
Current period benefit (charge) | (611) | 2,667 | 3,610
Current period benefit (charge) | 611 | (2,667) | (3,610)
Income tax benefit | 483 | (302) | (2,888)
Income tax benefit | (483) | 302 | 2,888
Balance at December 31, 2020 | (12,628) | (14,180) | (13,238)
Reclassification adjustments | 1,424 | 1,423 | (8,519)
AOCI Attributable to Parent [Member] |  |  |
Balances | (24,937) | (24,474) | (30,330)
Reclassification adjustments | 367 | 207 | 8,476
Reclassification adjustments | 367 | 207 | 8,476
Current period benefit (charge) | (645) | 697 | 76
Current period benefit (charge) | 645 | (697) | (76)
Income tax benefit | 784 | (441) | (2,696)
Income tax benefit | (784) | 441 | 2,696
Balance at December 31, 2020 | (25,443) | (24,937) | (24,474)
Reclassification adjustments | $ (367) | $ (207) | $ (8,476)

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