CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
License revenue		$ 84		$ 130
Sales	10		17
Total revenue	10	84	17	130
Cost of sales	12		16
Gross profit	(2)	84	1	130
Operating expenses:
Research and development	973	665	1,796	1,135
General and administrative	2,632	1,352	5,271	3,327
Total operating expenses	3,605	2,017	7,067	4,462
Net operating loss	(3,607)	(1,933)	(7,066)	(4,332)
Other income (expense):
Interest income	1		11
Interest expense	(8)	(12)	(21)	(43)
Interest expense, related parties	0	(17)	(1)	(34)
Loss on extinguishment of unsecured promissory note		(103)		(112)
Other income (expense)	31	83	39	51
Total other income (expense)	24	(49)	28	(138)
Net loss	(3,583)	(1,982)	(7,038)	(4,470)
Series A convertible preferred stock dividends		(30)		(60)
Net loss and comprehensive loss	$ (3,583)	$ (2,012)	$ (7,038)	$ (4,530)
Weighted average common shares outstanding - basic and fully diluted (in shares)	10,205,601	6,219,154	10,183,383	5,080,762
Net loss per common share - basic and fully diluted (in dollars per shares)	$ (0.35)	$ (0.31)	$ (0.69)	$ (0.89)