COMPREHENSIVE INCOME - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Reclassification adjustments out of accumulated other comprehensive loss
Other expense, net	$ (105)	$ (444)
Earnings before provision for income taxes	32,032	39,836
Provision for income taxes	(8,954)	(9,516)
Net Income (Loss)	23,078	30,320
Amortization of defined benefit pension items | Reclassification out of Accumulated Other Comprehensive Income
Reclassification adjustments out of accumulated other comprehensive loss
Earnings before provision for income taxes	148	416
Provision for income taxes	(39)	(108)
Net Income (Loss)	109	308
Prior service cost | Reclassification out of Accumulated Other Comprehensive Income
Reclassification adjustments out of accumulated other comprehensive loss
Other expense, net	(20)	(20)
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income
Reclassification adjustments out of accumulated other comprehensive loss
Other expense, net	$ 128	$ 396