Statements Of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statements Of Comprehensive Loss [Abstract]
Net Sales	$ 1,650	$ 1,716
Cost of Goods Sold	751	782
Gross Profit	899	934
Operating Expenses
Selling and marketing	377	427
General and administrative	444	482
Research and development	221	173
Total Operating Expenses	1,042	1,082
Operating Loss	(143)	(148)
Non-operating Income (Expense)
Interest expense	0	(1)
Interest income	8	11
Other income	3	3
Total Non-operating Income, Net	11	13
Loss before Income Taxes	(132)	(135)
Benefit from Income Taxes	(48)	(46)
Net Loss	(84)	(89)
Other Comprehensive Loss
Change in unrealized value of available-for-sale securities, net of income tax	0	0
Other Comprehensive Loss	0	0
Net Comprehensive Loss	$ (84)	$ (89)
Basic
Net loss per share	$ (0.02)	$ (0.03)
Weighted average shares	3,395,521	3,395,521
Diluted
Net loss per share	$ (0.02)	$ (0.03)
Weighted average shares	3,395,521	3,395,521