Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Components of property, plant and equipment

Ranges of estimated useful lives for computing depreciation are as follows:

Land improvements	20 years
Buildings and improvements	20 - 40 years
Machinery and equipment	3 - 15 years
Tools, dies and patterns	3 - 5 years

Property, plant, and equipment consisted of the following at December 31:

	2016			2015
Land and land improvements	$	5,958,000		$	5,958,000
Buildings	42,593,000			41,417,000
Machinery and equipment	89,692,000			87,482,000
Tools, dies, and patterns	808,000			808,000
Additions in progress	1,607,000			2,331,000
Total	140,658,000			137,996,000
Less accumulated depreciation	(70,057,000		)	(63,893,000		)
Property, plant, and equipment - net	$	70,601,000		$	74,103,000