Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 5,198,300	$ 5,717,179	$ 10,607,119	$ 11,360,303
Cost of sales	3,015,656	3,591,538	6,389,401	7,100,107
Gross profit	2,182,644	2,125,641	4,217,718	4,260,196
Operating expenses:
Research and development	949,704	805,229	1,839,821	1,517,573
Selling, general and administrative	2,897,182	2,977,904	6,004,703	5,668,747
Total operating expenses	3,846,886	3,783,133	7,844,524	7,186,320
Operating loss	(1,664,242)	(1,657,492)	(3,626,806)	(2,926,124)
Other (income) expense, net	14,633	2,493	31,105	5,055
Loss from continuing operations before income taxes	(1,649,609)	(1,654,999)	(3,595,701)	(2,921,069)
Income tax benefits		107,097		127,544
Loss from continuing operations	(1,649,609)	(1,547,902)	(3,595,701)	(2,793,525)
Income from discontinued operations, net of income taxes		207,896		247,588
Net (loss) income	(1,649,609)	(1,340,006)	(3,595,701)	(2,545,937)
Preferred Stock Dividends	278,332	74,158	551,877	74,158
Net (loss) income applicable to common stockholders	$ (1,927,941)	$ (1,414,164)	$ (4,147,578)	$ (2,620,095)
Per share basic and diluted income (loss) applicable to common stockholders:
Continuing operations	$ (0.15)	$ (0.12)	$ (0.31)	$ (0.22)
Discontinued operations		$ 0.01		$ 0.02
Net (loss) income	$ (0.15)	$ (0.11)	$ (0.31)	$ (0.20)
Weighted average number of common shares outstanding:
Basic and diluted	13,260,345	13,086,493	13,239,593	13,048,845