CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues	$ 28	$ 73	$ 28	$ 73
Cost of revenues	44	37	44	37
Gross profit (deficit)	(16)	36	(16)	36
Operating expenses:
Research and development	1,676	1,053	3,054	2,235
Selling, general and administrative	1,230	3,482	2,324	4,920
Total operating expenses	2,906	4,535	5,378	7,155
Operating loss	(2,922)	(4,499)	(5,394)	(7,119)
Other income (expense):
Change in fair value of warrant liability, net of issuance costs $129	210	0	210	0
Other expense	0	0	0	(3)
Other Nonoperating Income (Expense)	210	0	210	(3)
Loss before income taxes	(2,712)	(4,499)	(5,184)	(7,122)
Income taxes	0	0	0	0
Net loss	$ (2,712)	$ (4,499)	$ (5,184)	$ (7,122)
Basic and diluted net loss per share	$ (0.17)	$ (0.44)	$ (0.35)	$ (0.74)
Weighted average common shares, basic and diluted	15,535	10,303	14,822	9,592
Comprehensive loss:
Net loss	$ (2,712)	$ (4,499)	$ (5,184)	$ (7,122)
Foreign currency translation adjustments	0	1	0	(8)
Total comprehensive loss	$ (2,712)	$ (4,498)	$ (5,184)	$ (7,130)