Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 68,812	$ 43,777
Grant receivable	109	109
Prepaid expenses and other current assets	1,651	543
Total current assets	70,572	44,429
Property and equipment, net	6
Deferred offering costs	2,352
Other assets	13	0
Total assets	72,943	44,429
Current liabilities
Accounts payable	2,907	531
Accrued expenses and other current liabilities	1,611	423
Preferred stock tranche rights liability		5,033
Preferred stock warrant liability		380
Total liabilities	4,518	6,367
Convertible Preferred Stock, Issued	174,504	56,653
Stockholders' deficit
Additional paid-in capital	9,241	8,374
Accumulated deficit	(115,320)	(26,965)
Total stockholders' deficit	(106,079)	(18,591)
Total liabilities, convertible preferred stock and stockholders' deficit	72,943	44,429
Series A Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock, Issued	1,067	1,067
Stockholders' deficit
Total stockholders' deficit	1,067	1,067
Series A-1 Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock, Issued	22,963	16,333
Stockholders' deficit
Total stockholders' deficit	22,963	16,333
Series B Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock, Issued	150,474	39,253
Stockholders' deficit
Total stockholders' deficit	$ 150,474	$ 39,253