Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements Of Comprehensive Income [Abstract]
Net Sales	$ 1,885	$ 1,702
Cost of Goods Sold	823	732
Gross Profit	1,062	970
Operating Expenses
Selling and marketing	407	389
General and administrative	406	351
Research and development	216	165
Total Operating Expenses	1,029	905
Operating Income	33	65
Non-operating Income (Expense)
Gain on sale of available-for-sale securities	815	547
Other income	3	4
Interest income	1	1
Interest expense	(4)	(2)
Total Non-operating Income, Net	815	550
Income before Income Taxes	848	615
Provision for income taxes	295	215
Net Income	553	400
Other Comprehensive Loss
Change in unrealized value of available-for-sale securities, net of income tax	69	(52)
Reclassification of gains included in net income, net of income tax	(505)	(339)
Other comprehensive loss	(436)	(391)
Net Comprehensive Income	$ 117	$ 9
Basic
Net income per share	$ 0.16	$ 0.12
Weighted average shares	3,395,521	3,395,503
Diluted
Net income per share	$ 0.15	$ 0.11
Weighted average shares	3,653,021	3,642,094