Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net loss			$ (13,324)	$ (5,413)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	$ 22	$ 22	38	44
Non-cash stock-based compensation			1,648	753
Amortization of financing lease right-of-use assets	102	138	251	250
Amortization of operating lease right-of-use assets			217	61
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			702	(62)
Other current assets			(88)
Accounts payable			7	(372)
Accrued expenses and other current liabilities			290	(221)
Short-term operating lease liabilities			27	62
Long-term operating lease liabilities			(199)	(70)
Net cash used in operating activities			(10,431)	(4,968)
Investing activities
Purchases of property and equipment			(9)
Construction in progress			(669)
Net cash used in investing activities			(678)
Financing activities
Principal payments on financing leases			(230)	(248)
Exercise of common stock			61
Deferred offering costs paid				(779)
Net cash used in financing activities			(169)	(1,027)
Net increase in cash and restricted cash			(11,278)	(5,995)
Cash and restricted cash at beginning of period			37,272	17,994
Cash and restricted cash at end of period	25,994	11,999	25,994	11,999
Cash, end of period	25,742	11,999	25,742	11,999
Restricted cash, end of period	252		252
Cash and restricted cash, end of period	$ 25,994	$ 11,999	25,994	11,999
Supplemental disclosure of non-cash operating, financing and investing information
Purchase of construction in progress in accounts payable			484
Purchase of property and equipment in accounts payable			$ 1
Deferred offering costs included in accounts payable and accrued expenses				1,020
Initial measurement of operating lease right-of-use assets and liabilities				$ 3,483