CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 76,076	$ 31,360
Marketable securities	9,862	105,815
Prepaid expenses	4,046	3,153
Other current assets	272	475
Total current assets	90,256	140,803
Restricted cash equivalents	2,413	2,413
Property and equipment, net	8,291	10,050
Operating lease right-of-use assets	37,565	40,048
Other assets	3,063	4,812
Total assets	141,588	198,126
Current liabilities:
Accounts payable	2,007	815
Accrued liabilities	7,656	10,877
Operating lease liabilities	4,113	3,830
Other current liabilities	25	50
Total current liabilities	13,801	15,572
Long-term liabilities:
Operating lease liabilities—non-current	29,707	31,830
Total liabilities	43,508	47,402
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 0 shares issued and outstanding as of June 30, 2024 and December 31, 2023
Common stock, $0.0001 par value; 400,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 68,363,034, and 67,901,610 shares issued and 68,357,884 and 67,891,311 shares outstanding as of June 30, 2024 and December 31, 2023, respectively	7	7
Additional paid-in capital	496,866	490,874
Accumulated other comprehensive loss	(70)	(77)
Accumulated deficit	(398,723)	(340,080)
Total stockholders' equity	98,080	150,724
Total liabilities and stockholders' equity	$ 141,588	$ 198,126