Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net revenues:
Product revenues	$ 785	$ 452	$ 1,475	$ 997
License, royalty and other revenues	74	57	118	102
Total net revenues	859	509	1,593	1,099
Cost of goods sold	342	212	621	507
Gross margin	517	297	972	592
Operating expenses:
Research and development	277	254	507	523
Depreciation and amortization	60	56	119	111
Selling, general and administrative	880	804	1,651	1,582
Total operating expenses	1,217	1,114	2,277	2,216
Loss from operations	(700)	(817)	(1,305)	(1,624)
Interest expense	(64)	(30)	(130)	(44)
Interest income	1	1	2	3
Other income (expense)	(23)	11	(33)	(6)
Net loss	(786)	(835)	(1,466)	(1,671)
Other comprehensive income (loss), foreign currency translation adjustments	7	(1)	8
Total comprehensive loss	$ (779)	$ (836)	$ (1,458)	$ (1,671)
Net loss per common share, basic and diluted	$ (0.01)	$ (0.02)	$ (0.03)	$ (0.03)
Weighted average common shares outstanding, basic and diluted	53,626,707	48,545,720	51,625,048	48,359,620