Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Product revenue	$ 1,893	$ 1,808	$ 3,190	$ 3,033
Operating costs and expenses:
Cost of product revenue	537	608	1,041	1,245
Research and product development expenses	296	310	610	644
Selling, general and administrative expenses	747	781	1,635	1,616
Operating income (loss)	313	109	(96)	(472)
Other expense, net	0	(1)	(5)	(6)
Net income (loss)	$ 313	$ 108	$ (101)	$ (478)
Income (loss) per share (Basic)	$ .03	$ .02	$ (.01)	$ (.09)
Income (loss) per share (Diluted)	$ .03	$ .02	$ (.01)	$ (.09)
Weighted average shares outstanding (Basic)	9,137,497	5,248,482	9,081,451	5,250,892
Weighted average shares outstanding (Diluted)	9,398,330	5,422,842	9,081,451	5,250,892