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Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets:    
Pension and other postretirement costs $ 1,082 $ 1,775
Inventories 4,102 4,057
Net operating/capital loss and interest carryforwards 10,800 9,060
Tax credit carryforwards 1,390 2,372
Deferred compensation 2,845 2,921
Research and development costs 4,707 2,940
Other accruals and reserves 3,709 2,228
Total gross deferred tax assets 28,635 25,353
Less: valuation allowance (13,136) (10,726)
Deferred tax assets, net of valuation allowance 15,499 14,627
Deferred tax liabilities:    
Tax over book depreciation (2,151) (1,453)
Investment in subsidiary (2,121) (2,137)
Intangible assets, including tax deductible goodwill (10,843) (10,675)
Total gross deferred tax liabilities (15,115) (14,265)
Net deferred tax assets $ 384 $ 362