Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Reserve for receivables and inventory	$ 2,959	$ 2,972
Accrued compensation	4,069	2,209
Reserves and payables	2,509	2,340
Accrued post-retirement medical benefits	971	1,054
Net operating loss and credit carryforwards	4,948	2,827
Deferred compensation	1,269	1,139
Accrued qualified plan benefits	988	1,193
Accrued stock-based compensation	1,166	1,120
Deferred revenue	8,128	4,793
Operating lease liabilities	1,071	1,262
Research and development costs	5,744	2,625
Other	1,359	987
Total gross deferred tax assets	35,181	24,521
Less: valuation allowance	(2,683)	(2,690)
Total net deferred tax assets	32,498	21,831
Deferred tax liabilities:
Property, plant and equipment	4,323	4,454
Intangible assets	8,361	7,247
Prepaids	394	238
Operating lease assets	1,020	1,258
Other	746	525
Total deferred tax liabilities	14,844	13,722
Net deferred tax assets	$ 17,654	$ 8,109