Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 6,110,813	$ 5,785,832	$ 16,717,932	$ 17,146,135
Cost of sales	3,596,056	3,590,253	9,985,457	10,690,360
Gross profit	2,514,757	2,195,579	6,732,475	6,455,775
Operating expenses:
Research and development	906,202	996,132	2,746,023	2,513,705
Selling, general and administrative	3,131,409	3,039,552	9,136,112	8,708,299
Total operating expenses	4,037,611	4,035,684	11,882,135	11,222,004
Operating loss	(1,522,854)	(1,840,105)	(5,149,660)	(4,766,229)
Other (income) expense, net	41,898	(8,696)	10,793	(13,751)
Loss from continuing operations before income taxes	(1,564,752)	(1,831,409)	(5,160,453)	(4,752,478)
Income tax benefit		8,155		(119,389)
Loss from continuing operations	(1,564,752)	(1,839,564)	(5,160,453)	(4,633,089)
Income from discontinued operations, net of income taxes		(15,833)		231,755
Net loss	(1,564,752)	(1,855,397)	(5,160,453)	(4,401,334)
Preferred Stock Dividends	283,203	288,145	835,080	362,303
Net loss income applicable to common stockholders	$ (1,847,955)	$ (2,143,542)	$ (5,995,533)	$ (4,763,637)
Per share basic and diluted income (loss) applicable to common stockholders:
Continuing operations	$ (0.14)	$ (0.16)	$ (0.45)	$ (0.38)
Discontinued operations		$ 0.00		$ 0.02
Net (loss) income	$ (0.14)	$ (0.16)	$ (0.45)	$ (0.36)
Weighted average number of common shares outstanding:
Basic and diluted	13,313,901	13,144,326	13,264,362	13,080,766