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STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (3,147)	$ (3,272)	$ (5,676)	$ (4,712)	$ (4,834)	$ (4,100)	$ (6,419)	$ (8,934)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation							11	6
Amortization of right-of-use asset - operating							46	30
Share-based compensation							339	274
Loss from disposal of property and equipment							2
Change in operating assets and liabilities:
Other current assets							(156)	(697)
Other assets								(6)
Accounts payable							(7)	661
Accrued compensation and employee benefits							(601)	(609)
Accrued expenses and other liabilities							(135)	330
Net cash used in operating activities							(6,920)	(8,945)
Cash flows from investing activities:
Purchases of property and equipment							(2)	(22)
Net cash used in investing activities							(2)	(22)
Cash flows from financing activities:
Proceeds from the issuance of common stock								24,070
Common stock offering costs								(977)
Net cash provided by financing activities								23,093
Net (decrease) increase in cash and cash equivalents							(6,922)	14,126
Cash and cash equivalents, beginning of period		$ 53,359		$ 63,197		$ 49,071	53,359	49,071	$ 49,071
Cash and cash equivalents, end of period	$ 46,437		$ 53,359		$ 63,197		$ 46,437	63,197	$ 53,359
Supplemental disclosure of noncash investing and financing transactions:
Leased assets obtained in exchange for operating lease liabilities								84
Purchases of property and equipment in accrued liabilities								$ 8

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