CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flow from operating activities
Net loss	$ (3,359)	$ (2,447)
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation	217	140
Amortization of right of use assets	23	20
Depreciation	22	18
(Increase) decrease in operating assets
Prepaid drug product	(429)	298
Other current assets	433	78
Increase (decrease) in operating liabilities
Accounts payable and accrued expenses	591	344
Lease liabilities	(24)	(23)
Net cash used in operating activities	(2,526)	(1,572)
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 (decrease) increase in cash	(2,526)	17,038
Cash, beginning of period	23,774	13,755
Cash, end of period	21,248	$ 30,793
Non-cash operating activities
Right of use asset recognized in exchange for lease obligation	$ 85