Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales from continuing operations	$ 5,224,873	$ 5,455,526
Cost of sales	2,380,838	2,574,871
Gross profit	2,844,035	2,880,655
Operating expenses:
Research and development	823,593	955,407
Selling, general and administrative	3,574,267	3,367,884
Total operating expenses	4,397,860	4,323,291
Operating loss	(1,553,825)	(1,442,636)
Interest expense	259,693	199,248
Other income	(141)	(4,873)
Loss from continuing operations before income taxes	(1,813,377)	(1,637,011)
Income tax expense (benefit)	10,543	(1,091,246)
Loss from continuing operations	(1,823,920)	(545,765)
Discontinued operations:
(Loss) income from discontinued operations	(30,123)	175,752
Gain on sale of discontinued operations		2,942,095
Income tax (benefit) expense	(10,543)	1,091,246
(Loss) income from discontinued operations	(19,580)	2,026,601
Net (loss) income	(1,843,500)	1,480,836
Preferred stock dividend accretion	387,006	361,060
Net (loss) income applicable to common stockholders	$ (2,230,506)	$ 1,119,776
Loss per common share from continuing operations - Basic and diluted	$ (0.08)	$ (0.03)
(Loss) income per common share from discontinued operations: Basic and diluted	(0.00)	0.07
Per share basic and diluted loss applicable to common stockholders	$ (0.08)	$ 0.04
Weighted-average number of common shares outstanding: Basic and diluted	27,025,915	26,800,433