Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 13,880,000	$ 21,924,000	$ 28,227,000
Cost of sales	10,471,000	17,672,000	23,400,000
Gross margin	3,409,000	4,252,000	4,827,000
Engineering, selling & administrative	3,991,000	4,819,000	5,559,000
Goodwill impairment	0	1,329,000	0
Operating loss	(582,000)	(1,896,000)	(732,000)
Other expense (income):
Interest	0	29,000	77,000
Other income	(3,000)	(18,000)	(10,000)
Loss before income tax	(579,000)	(1,907,000)	(799,000)
Income tax expense (benefit)	8,000	539,000	(8,000)
Net loss from continuing operations	(587,000)	(2,446,000)	(791,000)
Discontinued operations:
Earnings (loss) from discontinued operations	88,000	(916,000)	1,442,000
Loss on sale of assets	0	(2,145,000)	0
Discontinued operations, net of income taxes	88,000	(3,061,000)	1,442,000
Net (loss) income	$ (499,000)	$ (5,507,000)	$ 651,000
Basic and Diluted net earnings per common share
Continuing operations (in dollars per share)	$ (0.05)	$ (0.21)	$ (0.06)
Discontinued operations (in dollars per share)	0.01	(0.26)	0.12
Net (loss) income per share (in dollars per share)	$ (0.04)	$ (0.47)	$ 0.06
Basic common weighted shares outstanding (in shares)	11,675,674	11,738,867	11,707,043
Diluted common weighted shares outstanding (in shares)	11,675,674	11,738,867	11,707,887