CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flow from operating activities
Net loss	$ (4,255)	$ (5,364)
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation	329	289
Amortization of right of use assets	42	38
Depreciation	36	36
(Increase) decrease in operating assets
Prepaid drug product	(263)	(303)
Other current assets	(82)	(646)
Increase (decrease) in operating liabilities
Accounts payable and accrued expenses	14	(23)
Lease liabilities	(46)	(42)
Net cash used in operating activities	(4,225)	(6,015)
Cash flow from investing activities
Purchases of furniture, fixtures & equipment	(47)
Net cash used in investing activities	(47)
Cash flow from financing activities
Net proceeds from sale of common stock	14,453
Net proceeds from exercise of warrants	4,157
Net cash provided by financing activities	18,610
Net increase (decrease) in cash	14,338	(6,015)
Cash, beginning of period	13,755	20,426
Cash, end of period	$ 28,093	$ 14,411