Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Consolidated Statements Of Comprehensive Income [Abstract]
Net Sales	$ 1,837	$ 2,132	$ 5,562	$ 6,065
Cost of Goods Sold	835	920	2,452	2,665
Gross Profit	1,002	1,212	3,110	3,400
Operating Expenses
Selling and marketing	387	368	1,262	1,186
General and administrative	386	389	1,199	1,194
Research and development	200	161	561	566
Total Operating Expenses	973	918	3,022	2,946
Operating Income	29	294	88	454
Non-operating Income (Expense)
Interest expense	0	(3)	(1)	(9)
Gain on sale of available-for-sale securities	0	0	0	1,449
Interest income	3	4	18	6
Other income	3	4	12	11
Total Non-operating Income, Net	6	5	29	1,457
Income before Income Taxes	35	299	117	1,911
Income taxes	12	104	43	667
Net Income	23	195	74	1,244
Other Comprehensive Income (Loss)
Change in unrealized value of available-for-sale securities, net of income tax	2	0	6	132
Reclassification of gains included in net income, net of income tax	0	0	0	(899)
Other Comprehensive Income (Loss)	2	0	6	(767)
Net Comprehensive Income	$ 25	$ 195	$ 80	$ 477
Basic
Net income per share	$ 0.01	$ 0.06	$ 0.02	$ 0.37
Weighted average shares	3,395,521	3,395,521	3,395,521	3,395,521
Diluted
Net income per share	$ 0.01	$ 0.05	$ 0.02	$ 0.34
Weighted average shares	3,703,021	3,653,021	3,695,722	3,653,021