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Accumulated Balances of Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance $ 43,538    
Foreign currency translation adjustment (78) $ (129) $ (190)
Unrealized holding gain arising during period (865) (1,453) 620
Reclassification adjustment for loss included in net income   (76)  
Ending balance 40,343 43,538  
Foreign currency items      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (22,087) (21,943) (21,753)
Foreign currency translation adjustment (177) (144) (190)
Ending balance (22,264) (22,087) (21,943)
Unrealized gain (loss) on securities      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (1,282) 232 (388)
Foreign currency translation adjustment 99 15  
Unrealized holding gain arising during period (865) (1,453) 620
Reclassification adjustment for loss included in net income   (76)  
Ending balance (2,048) (1,282) 232
Pension and post retirement benefit plans      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (15) (4) (80)
Pension and post retirement benefit adjustment 44 (11) 76
Ending balance 29 (15) (4)
Accumulated other comprehensive loss      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (23,384) (21,715) (22,221)
Foreign currency translation adjustment (78) (129) (190)
Pension and post retirement benefit adjustment 44 (11) 76
Unrealized holding gain arising during period (865) (1,453) 620
Reclassification adjustment for loss included in net income   (76)  
Ending balance $ (24,283) $ (23,384) $ (21,715)