CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flow from operating activities
Net loss	$ (4,856)	$ (5,379)
Adjustments to reconcile net loss to net cash used in operating activities
Amortization	120	121
Depreciation	185	31
Stock-based compensation	675	550
Change in fair value of warrant liability	(2,374)	(1,420)
Loss on extinguishment of warrant liability	440	0
(Increase) decrease in assets
Prepaid drug product for testing	(277)	364
Other current assets	391	(733)
Increase (decrease) in liabilities
Accounts payable and accrued expenses	(36)	(71)
Net cash used in operating activities	(5,732)	(6,537)
Cash flow from investing activities
Purchases of furniture, fixtures & equipment	(538)	(25)
Net cash used in investing activities	(538)	(25)
Cash flow from financing activities
Net proceeds from sale of common stock	0	9,007
Net proceeds from exercise of warrants	1,518	0
Net cash provided by financing activities	1,518	9,007
Net increase (decrease) in cash	(4,752)	2,445
Cash, beginning of period	9,375	8,854
Cash, end of period	4,623	11,299
Non-cash financing activities
Incremental fair value of warrant liability modification	797	0
Conversion of warrant liability to equity	$ 175	$ 0