Income Taxes - Schedule of Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Accrued expenses	$ 889	$ 627
Allowance for credit losses	501	152
Contract overrun reserves	1,323	952
Deferred compensation	526	234
Deferred revenue	0	943
Employment-related accruals	5,022	3,932
Environmental reserves	501	501
Federal tax credit carryforwards	133	133
Inventory reserves	4,628	3,572
Operating lease liabilities	7,318	8,672
Pension obligation	553	28
Federal and state net operating loss carryforwards	2,560	3,397
Research expenses	21,822	10,620
State tax credit carryforwards	7,582	6,974
Stock-based compensation	1,852	2,420
Other	1,798	1,525
Total gross deferred tax assets	57,008	44,682
Valuation allowance	(7,464)	(7,548)
Total gross deferred tax assets, net of valuation allowance	49,544	37,134
Deferred tax liabilities:
Deferred revenue	(2,794)	0
Depreciation	(11,622)	(11,286)
Goodwill	(10,973)	(8,630)
Intangibles	(16,265)	(18,310)
Interest rate hedge	(3,659)	(3,359)
Operating lease right-of-use assets	(7,087)	(8,346)
Prepaid insurance	(770)	(609)
Other	(499)	(547)
Total gross deferred tax liabilities	(53,669)	(51,087)
Net deferred tax liabilities	$ (4,125)	$ (13,953)