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Property, Plant and Equipment (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Sep. 24, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | $ 162,061,000 | $ 168,638,000
Less: accumulated depreciation and amortization, including accumulated amortization of finance leases |  | (103,839,000) | (106,553,000)
Property, plant, and equipment - net |  | 58,222,000 | 62,085,000
Depreciation |  | 8,051,000 | 7,850,000
Asset impairment |  | 0 |
Discontinued Operations, Disposed of by Sale |  |  |
Property, Plant and Equipment |  |  |
Proceeds from divestiture of businesses | $ 23,902,000 |  |
Land |  |  |
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | 6,224,000 | 6,627,000
Improvements to land and leaseholds |  |  |
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | 15,416,000 | 17,573,000
Buildings |  |  |
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | 27,206,000 | 27,348,000
Machinery and equipment, including equipment under finance leases |  |  |
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | 112,021,000 | 116,175,000
Construction in progress |  |  |
Property, Plant and Equipment |  |  |
Gross property, plant, and equipment |  | $ 1,194,000 | $ 915,000

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