CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales	$ 13,804,000	$ 15,788,000	$ 27,423,000	$ 30,845,000
Cost of sales	8,016,000	9,336,000	15,909,000	17,960,000
Gross profit	5,788,000	6,452,000	11,514,000	12,885,000
Operating expenses:
Engineering, design and product development	1,151,000	995,000	2,381,000	2,007,000
Selling and marketing	2,257,000	1,857,000	4,222,000	3,643,000
General and administrative	2,000,000	1,736,000	3,888,000	3,770,000
Legal fees associated with lawsuit (Note 8)	35,000	57,000	47,000	256,000
	5,443,000	4,645,000	10,538,000	9,676,000
Operating income	345,000	1,807,000	976,000	3,209,000
Interest and other income (expense):
Interest, net	(12,000)		(26,000)	(1,000)
Other, net	(12,000)	(4,000)	(20,000)	33,000
	(24,000)	(4,000)	(46,000)	32,000
Income before income taxes	321,000	1,803,000	930,000	3,241,000
Income tax provision	146,000	588,000	361,000	866,000
Net income	$ 175,000	$ 1,215,000	$ 569,000	$ 2,375,000
Net income per common share:
Basic (in Dollars per share)	$ 0.02	$ 0.14	$ 0.07	$ 0.27
Diluted (in Dollars per share)	$ 0.02	$ 0.14	$ 0.07	$ 0.27
Shares used in per-share calculation:
Basic (in Shares)	8,376	8,728	8,374	8,722
Diluted (in Shares)	8,520	8,802	8,538	8,803
Dividends declared and paid per common share: (in Dollars per share)	$ 0.08	$ 0.07	$ 0.15	$ 0.13