Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements Of Comprehensive Income [Abstract]
Net Sales	$ 2,009	$ 2,048	$ 3,725	$ 3,933
Cost of Goods Sold	835	922	1,617	1,745
Gross Profit	1,174	1,126	2,108	2,188
Operating Expenses
Selling and marketing	448	411	875	818
General and administrative	331	399	813	805
Research and development	188	189	361	405
Total Operating Expenses	967	999	2,049	2,028
Operating Income	207	127	59	160
Non-operating Income (Expense)
Interest expense	0	(2)	(1)	(6)
Gain on sale of available-for-sale securities	0	634	0	1,449
Interest income	4	1	15	2
Other income	6	4	9	7
Total Non-operating Income, Net	10	637	23	1,452
Income before Income Taxes	217	764	82	1,612
Income taxes	77	268	31	563
Net Income	140	496	51	1,049
Other Comprehensive Income (Loss)
Change in unrealized value of available-for-sale securities, net of income tax	4	63	4	132
Reclassification of gains included in net income, net of income tax	0	(394)	0	(899)
Other Comprehensive Income (Loss)	4	(331)	4	(767)
Net Comprehensive Income	$ 144	$ 165	$ 55	$ 282
Basic
Net income per share	$ 0.04	$ 0.15	$ 0.01	$ 0.31
Weighted average shares	3,395,521	3,395,521	3,395,521	3,395,521
Diluted
Net income per share	$ 0.04	$ 0.14	$ 0.01	$ 0.29
Weighted average shares	3,692,032	3,653,021	3,703,021	3,653,021