Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 238,173	$ 68,985
Short-term investments	116,326	176,985
Prepaid expenses and other current assets	9,226	10,378
Total current assets	363,725	256,348
Property and equipment, net	10,176	7,954
Operating lease right-of-use assets	24,556	27,958
Long-term investments	6,862	27,117
Restricted cash	871	871
Other assets	5,429	4,089
Total noncurrent assets	47,894	67,989
Total assets	411,619	324,337
Current liabilities:
Accounts payable	7,039	6,758
Accrued compensation	2,060	3,455
Accrued manufacturing expenses	4,830	4,440
Accrued expenses	9,894	8,787
Operating lease liabilities — current	6,644	5,276
Total current liabilities	30,467	28,716
Operating lease liabilities — long-term	14,560	11,507
Other liabilities	92	96
Total liabilities	45,119	40,319
Commitments and contingencies (Note 6)
Stockholders' Equity
Preferred stock, $0.001 par value - 10,000,000 shares authorized at June 30, 2022 and December 31, 2021; no shares issued and outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock, $0.001 par value - 500,000,000 shares authorized at June 30, 2022 and December 31, 2021; 58,624,294 and 53,031,978 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	62	56
Additional paid-in capital	753,501	582,844
Accumulated other comprehensive loss	(904)	(241)
Accumulated deficit	(386,159)	(298,641)
Total stockholders' equity	366,500	284,018
Total liabilities and stockholders' equity	$ 411,619	$ 324,337