Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements Of Comprehensive Income [Abstract]
Net Sales	$ 2,132	$ 1,917	$ 6,065	$ 5,379
Cost of Goods Sold	920	770	2,665	2,246
Gross Profit	1,212	1,147	3,400	3,133
Operating Expenses
Selling and marketing	368	409	1,186	1,197
General and administrative	389	327	1,194	971
Research and development	161	186	566	567
Total Operating Expenses	918	922	2,946	2,735
Operating Income	294	225	454	398
Non-operating Income (Expense)
Interest expense	(3)	(5)	(9)	(12)
Gain on sale of available-for-sale securities	0	258	1,449	1,008
Interest income	4	0	6	2
Other income	4	3	11	11
Total Non-operating Income, Net	5	256	1,457	1,009
Income before Income Taxes	299	481	1,911	1,407
Income taxes	104	168	667	492
Net Income	195	313	1,244	915
Other Comprehensive Loss
Change in unrealized value of available-for-sale securities, net of income tax	0	(67)	132	(276)
Reclassification of gains included in net income, net of income tax	0	(160)	(899)	(625)
Other comprehensive loss	0	(227)	(767)	(901)
Net Comprehensive Income	$ 195	$ 86	$ 477	$ 14
Basic
Net income per share	$ 0.06	$ 0.09	$ 0.37	$ 0.27
Weighted average shares	3,395,521	3,395,521	3,395,521	3,395,515
Diluted
Net income per share	$ 0.05	$ 0.09	$ 0.34	$ 0.25
Weighted average shares	3,653,021	3,658,751	3,653,021	3,652,761