CONDENSED CONSOLIDATED STATEMENT OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (UNAUDITED) - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Beginning Balance, Shares at Dec. 31, 2015	694,397
Beginning Balance, Amount at Dec. 31, 2015	$ 694	$ 229,456	$ (62,556)	$ 167,594
Exercise of warrants, Shares	27
Exercise of warrants, Amount		35		35
Exercise of common stock options, Shares	20
Exercise of common stock options, Amount		3		3
Stock-based compensation		1,436		1,436
Sale of common shares, Shares	9,812
Sale of common shares, Amount	$ 10	4,994		5,004
Net loss			(7,239)	(7,239)
Ending Balance, Shares at Jun. 30, 2016	704,256
Ending Balance, Amount at Jun. 30, 2016	$ 704	$ 235,924	$ (69,795)	$ 166,833