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Note 4 - Accumulated Other Comprehensive Loss - Changes in Each Component of Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Balance $ 73,074 $ 72,220
Other comprehensive loss, net (1,480) 862
Balance 63,340 73,074
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Balance (9,885) (11,392)
Other comprehensive loss, net (1,405) 1,507
Balance (11,290) (9,885)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Balance (4,106) (3,660)
Other comprehensive loss, net (175) (446)
Balance (4,281) (4,106)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Balance (199) 0
Other comprehensive loss, net 100 (199)
Balance (99) (199)
AOCI Attributable to Parent [Member]    
Balance (14,190) (15,052)
Other comprehensive loss, net (1,480) 862
Balance $ (15,670) $ (14,190)