CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 32,212	$ 57,706
Marketable securities	154,690	172,539
Prepaid expenses	3,952	4,368
Other current assets	539	2,337
Total current assets	191,393	236,950
Restricted cash equivalents	2,413	2,413
Property and equipment, net	11,458	12,634
Operating lease right-of-use assets	42,454	44,444
Other assets	3,268	2,925
Total assets	250,986	299,366
Current liabilities:
Accounts payable	1,648	1,772
Accrued liabilities	7,256	7,889
Operating lease liabilities	3,691	3,272
Other current liabilities	122	186
Total current liabilities	12,717	13,119
Long-term liabilities:
Operating lease liabilities—non-current	33,819	35,640
Total liabilities	46,536	48,759
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of March 31, 2023 and December 31, 2022; 0 shares issued and outstanding as of March 31, 2023 and December 31, 2022
Common stock, $0.0001 par value; 400,000,000 shares authorized as of March 31, 2023 and December 31, 2022; 66,991,060 and 66,079,597 shares issued and 66,934,897 and 65,996,138 outstanding as of March 31, 2023 and December 31, 2022, respectively	7	7
Additional paid-in capital	485,508	473,587
Accumulated other comprehensive loss	(436)	(770)
Accumulated deficit	(280,629)	(222,217)
Total stockholders' equity	204,450	250,607
Total liabilities and stockholders' equity	$ 250,986	$ 299,366