Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 5,576	$ 5,432	$ 17,713	$ 17,057
Cost of goods sold	3,399	3,531	11,010	10,471
Gross profit	2,177	1,901	6,703	6,586
Operating expenses:
Selling	631	645	1,941	1,961
General and administrative	956	959	2,802	2,906
Research and development	605	711	1,877	2,098
Total operating expenses	2,192	2,315	6,620	6,965
Earnings (loss) from operations	(15)	(414)	83	(379)
Other Expense - net	(138)	(107)	(581)	(285)
Change in derivative liability		(121)	(142)	(194)
Loss before income taxes	(153)	(642)	(640)	(857)
Provision (benefit) for income taxes
Net loss	$ (153)	$ (642)	$ (640)	$ (857)
Basic and diluted net loss per share	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.12)
Basic weighted averages shares outstanding	8,122	7,738	8,122	7,179
Diluted weighted average shares outstanding	8,122	7,738	8,122	7,179