Balance Sheets - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 232,545,000	$ 138,483,000
Restricted cash		34,650,000
Grant receivables	183,000	471,000
Prepaid research and development expenses		12,014,000
Prepaid expenses and other current assets	3,387,000	3,106,000
Total current assets	236,115,000	188,724,000
Property and equipment, net	10,528,000	9,114,000
Operating lease right-of-use-assets	12,907,000	567,000
Other long-term assets	6,278,000
Total assets	265,828,000	198,405,000
Current liabilities:
Accounts payable	5,122,000	4,906,000
Accrued compensation	6,369,000	2,739,000
Accrued liabilities	6,383,000	7,693,000
Operating lease liabilities, current portion	1,232,000	693,000
Total current liabilities	19,106,000	16,031,000
Operating lease liabilities, long-term portion	12,745,000
Total liabilities	31,851,000	16,031,000
Commitments and contingencies (Note 6)
Convertible preferred stock, $0.0001 par value-no shares authorized as of December 31, 2021 and 229,296,908 shares authorized as of December 31, 2020; no shares issued and outstanding as of December 31, 2021 and 53,509,351 shares issued and outstanding as of December 31, 2020; no aggregate liquidation preference as of December 31, 2021 and $475,617 as of December 31, 2020		290,945,000
Stockholders’ equity (deficit):
Common stock, $0.0001 par value; 200,000,000 and 230,000,000 shares authorized at December 31, 2021 and December 31, 2020, respectively; 26,408,031 and 2,126,254 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	3,000
Additional paid-in capital	598,913,000	64,335,000
Accumulated deficit	(364,942,000)	(172,906,000)
Total stockholders’ equity (deficit)	233,977,000	(108,571,000)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	265,828,000	$ 198,405,000
Series 1 Convertible Preferred Stock
Stockholders’ equity (deficit):
Series 1 convertible preferred stock, $0.0001 par value-60,000,000 and 57,324,227 shares authorized as of December 31, 2021 and December 31, 2020, respectively; 29,863,674 and no shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively; aggregate liquidation preference of $3 as of December 31, 2021 and none as of December 31, 2020	$ 3,000