Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Inventory basis difference	$ 892	$ 519
Accounts receivable reserve	240	255
Rental equipment and Property, plant and equipment	201	144
Stock based compensation	688	606
Pension liability	3,116	3,655
Employee benefit accrual	2,747	1,585
Product liability and warranty reserves	2,155	2,242
Foreign net operating loss	3,764	3,566
Lease liability	3,858	3,376
State net operating loss	157	148
Other	1,016	1,891
Total deferred income tax assets	18,834	17,987
Less: Valuation allowance	(4,129)	(3,641)
Net deferred income tax assets	14,705	14,346
Deferred income tax liabilities:
Inventory basis differences	(165)	(287)
Rental equipment and Property, plant and equipment	(13,844)	(14,818)
Lease asset	(3,794)	(3,351)
Intangible assets	(16,197)	(16,496)
Expenses not currently deductible for book purposes	(1,053)	(1,003)
Total deferred income tax liabilities	(35,053)	(35,955)
Net deferred income taxes	$ (20,348)	$ (21,609)