Income Taxes - Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Pension and other retiree obligations	$ 265	$ 323
Inventory	0	482
Other accruals and reserves	6,132	5,020
Loss and credit carryforwards	43,737	39,172
Interest expense deduction limitation carryforward	8,975	8,147
Investments	2,075	2,137
Right-of-use asset	1,574	1,410
Other	3,527	2,326
Valuation allowance	(61,677)	(55,996)
Deferred tax assets	4,608	3,021
Deferred tax liabilities:
Inventory	(432)	0
Intangible assets other than goodwill	(24,508)	(24,404)
Property, plant and equipment	(376)	(1,315)
Unrealized foreign currency gains	(5,236)	(3,862)
Lease liability	(1,497)	(1,575)
Deferred tax liabilities	(32,049)	(31,156)
Net deferred tax (liabilities) assets	$ (27,441)	$ (28,135)