BUSINESS SEGMENTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 Segment		Dec. 31, 2011
BUSINESS SEGMENTS [Abstract]
Number of business segments	2
Business segment information [Abstract]
Net sales	$ 29,438,000		$ 31,041,000
Income (loss) before income tax provision [Abstract]
Interest expense	(124,000)		(189,000)
Investment and other income, net	144,000		149,000
(Loss) income before income tax provision	(65,000)		3,234,000
Assets [Abstract]
Assets	24,976,000		25,411,000
Elimination of intersegment receivables	0		(46,000)
Elimination of intersegment gross profit in ending inventory	(50,000)		(64,000)
Depreciation and amortization [Abstract]
Depreciation and amortization	290,000		271,000
Goodwill and intangible asset impairment charges	1,194,000		820,000
Electronics Group [Member]
Business segment information [Abstract]
Net sales	17,066,000		18,710,000
Income (loss) before income tax provision [Abstract]
(Loss) income before income tax provision	(1,592,000)	[1]	1,563,000	[1]
Assets [Abstract]
Assets	12,540,000		12,118,000
Depreciation and amortization [Abstract]
Depreciation and amortization	288,000		270,000
Power Group [Member]
Business segment information [Abstract]
Net sales	12,382,000		12,726,000
Income (loss) before income tax provision [Abstract]
(Loss) income before income tax provision	2,717,000		3,009,000
Assets [Abstract]
Assets	8,504,000		6,846,000
Depreciation and amortization [Abstract]
Depreciation and amortization	0		0
Intersegment [Member]
Business segment information [Abstract]
Net sales	(10,000)		(395,000)
Income (loss) before income tax provision [Abstract]
(Loss) income before income tax provision	14,000		(42,000)
General Corporate Not Allocated [Member]
Income (loss) before income tax provision [Abstract]
(Loss) income before income tax provision	(1,224,000)		(1,256,000)
Assets [Abstract]
Assets	3,982,000		6,557,000
Corporate [Member]
Depreciation and amortization [Abstract]
Depreciation and amortization	2,000		1,000
Domestic [Member] | Electronics Group [Member]
Business segment information [Abstract]
Net sales	15,311,000		17,657,000
Domestic [Member] | Power Group [Member]
Business segment information [Abstract]
Net sales	11,326,000		11,403,000
Foreign [Member] | Electronics Group [Member]
Business segment information [Abstract]
Net sales	1,755,000		1,053,000
Foreign [Member] | Power Group [Member]
Business segment information [Abstract]
Net sales	$ 1,056,000		$ 1,323,000

[1] Includes costs related to non-renewal of a senior officer contract and a goodwill impairment charge of $1,194,000 and $820,000, respectively, in 2012.