Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss	$ (8,567)	$ (7,346)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	39	26
Operating lease right of use asset amortization	99	88
Financing lease right of use asset amortization	638	0
Stock-based compensation	1,585	1,578
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(341)	(527)
Accounts payable	96	(31)
Accrued expenses	10	(27)
Accrued payroll expenses	(91)	(383)
Operating lease liability	(83)	(12)
Net cash used in operating activities	(6,615)	(6,634)
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of property and equipment	(19)	(79)
Net cash used in investing activities	(19)	(79)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from at-the-market sale of stock, net of commissions and expenses	185	243
Proceeds from exercise of stock options	166	2,869
Payments on principal of financing lease	(578)	0
Net cash provided (used) by financing activities	(227)	3,112
Net decrease in cash and cash equivalents	(6,861)	(3,601)
Cash and cash equivalents at beginning of period	28,699	37,942
Cash and cash equivalents at end of period	21,838	34,341
Supplemental information:
Cash paid for interest	140	0
Cash paid for taxes	$ 0	$ 66