Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 112,044	$ 386,200
Short-term investments	166,532
Prepaid expenses and other current assets	24,373	2,804
Total current assets	302,949	389,004
Property and equipment, net	6,626	3,272
Operating lease right-of-use assets	307
Long-term investments	39,735
Restricted cash	871
Other assets	3,580	550
Total noncurrent assets	51,119	3,822
Total assets	354,068	392,826
Current liabilities:
Accounts payable	25,713	29,785
Accrued compensation	2,075	284
Accrued manufacturing expenses	7,033	13,012
Accrued expenses (including related party accrual of $0 and $677 as of September 30, 2021 and December 31, 2020, respectively)	12,027	3,766
Deferred rent — current		14
Operating lease liabilities — current	613
Total current liabilities	47,461	46,861
Deferred rent — long-term		10
Operating lease liabilities — long-term	553
Other liabilities	98	112
Total liabilities	48,112	46,983
Commitments and contingencies (Note 6)
Stockholders' Equity
Preferred stock, $0.001 par value — 10,000,000 shares authorized at September 30, 2021 and December 31, 2020; no shares issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.001 par value — 500,000,000 shares authorized at September 30, 2021 and December 31, 2020; 52,587,855 and 51,071,593 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	56	54
Additional paid-in capital	575,990	544,353
Accumulated other comprehensive loss	(12)
Accumulated deficit	(270,078)	(198,564)
Total stockholders' equity	305,956	345,843
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 354,068	$ 392,826