CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) [Abstract]
Net sales	$ 6,447,000	$ 6,162,000
Cost of sales	3,956,000	3,775,000
Gross profit	2,491,000	2,387,000
Selling, general and administrative expenses	2,531,000	2,597,000
Costs related to non-renewal of senior officer contract	0	1,194,000
Interest expense	17,000	34,000
Investment and other income, net	(3,000)	(93,000)
Loss before income tax provision	(54,000)	(1,345,000)
Income tax provision	26,000	30,000
NET LOSS	(80,000)	(1,375,000)
Change in unrealized gains and (losses) on marketable securities, net of income tax	4,000	15,000
Comprehensive loss	$ (76,000)	$ (1,360,000)
Net loss per common share:
Basic (in dollars per share)	$ (0.02)	$ (0.30)
Diluted (in dollars per share)	$ (0.02)	$ (0.30)