CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 31,360	$ 57,706
Marketable securities	105,815	172,539
Prepaid expenses	3,153	4,368
Other current assets	475	2,337
Total current assets	140,803	236,950
Restricted cash equivalents	2,413	2,413
Property and equipment, net	10,050	12,634
Operating lease right-of-use assets	40,048	44,444
Other assets	4,812	2,925
Total assets	198,126	299,366
Current liabilities:
Accounts payable	815	1,772
Accrued liabilities	10,877	7,889
Operating lease liabilities	3,830	3,272
Other current liabilities	50	186
Total current liabilities	15,572	13,119
Long-term liabilities:
Operating lease liabilities—non-current	31,830	35,640
Total liabilities	47,402	48,759
Stockholders' equity :
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of December 31, 2023 and December 31, 2022; 0 shares issued and outstanding as of December 31, 2023 and December 31, 2022
Common stock, $0.0001 par value; 400,000,000 shares authorized as of December 31, 2023 and December 31, 2022; 67,901,610, and 66,079,597 shares issued and 67,891,311 and 65,996,138 outstanding as of December 31, 2023 and December 31, 2022, respectively	7	7
Additional paid-in capital	490,874	473,587
Accumulated other comprehensive loss	(77)	(770)
Accumulated deficit	(340,080)	(222,217)
Total stockholders' equity	150,724	250,607
Total liabilities and stockholders' equity	$ 198,126	$ 299,366