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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)

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