Consolidated Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements Of Operations And Comprehensive Income [Abstract]
Net Sales	$ 6,115	$ 5,794
Cost of Goods Sold	2,613	2,442
Gross Profit	3,502	3,352
Operating Expenses
Selling and marketing	1,369	1,141
General and administrative	956	1,022
Research and development	437	470
Total Operating Expenses	2,762	2,633
Operating Income	740	719
Non-operating Income (Expense):
Gain on sale of investment securities	73	0
Interest income	6	2
Loss on disposal of fixed assets	(18)	0
Other income	8	9
Total Non-operating Income	69	11
Income from Continuing Operations before Income Taxes	809	730
Income Taxes	211	190
Income before Discontinued Operations	598	540
Loss from Discontinued Operations, Net of Income Taxes	(50)	(13)
Net Income	548	527
Other Comprehensive Income:
Change in Unrealized Value of Available for Sale Securities, Net of Tax	218	321
Total Comprehensive Income	$ 766	$ 848
Net Income per share data
Net income per share continuing operations	$ 0.17	$ 0.16
Net loss per share discontinued operations	$ (0.01)	$ 0.00
Net income per share	$ 0.16	$ 0.16
Weighted average shares	3,387,192	3,381,905
Diluted
Net income per share continuing operations	$ 0.17	$ 0.15
Net loss per share discontinued operations	$ (0.01)	$ 0.00
Net income per share	$ 0.16	$ 0.15
Weighted average shares	3,405,738	3,404,443
Dividends paid per common share	$ 0.16	$ 0.16