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Property, Plant, and Equipment (Tables)
 12 Months Ended
Dec. 31, 2020
Property, Plant, and Equipment  
Property, Plant, and Equipment
2020
2019
Land and land improvements
$
6,009,000
$
6,009,000
Buildings
43,545,000
43,375,000
Machinery and equipment
121,382,000
118,366,000
Tools, dies, and patterns
2,195,000
1,516,000
Additions in progress
1,422,000
1,615,000
Total
174,553,000
170,881,000
Less accumulated depreciation
(100,501,000)
(91,675,000)
Property, plant and equipment,
 
net
$
74,052,000
$
79,206,000