Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 59,303	$ 45,681
Short-term investments in marketable securities	62,946	58,961
Prepaid expenses and other current assets	6,450	6,940
Total current assets	128,699	111,582
Property and equipment, net	41,396	43,277
Operating lease right-of-use assets	9,177	9,979
Other noncurrent assets	5,627	5,677
Total assets	184,899	170,515
Current liabilities:
Accounts payable	6,659	5,630
Accrued and other current liabilities	8,435	12,784
Operating lease liabilities, current	4,064	4,319
Total current liabilities	19,158	22,733
Operating lease liabilities, noncurrent	7,302	8,105
Other noncurrent liabilities	259	253
Total liabilities	26,719	31,091
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock	8	7
Additional paid-in capital	593,802	542,805
Accumulated other comprehensive loss	(120)	(106)
Accumulated deficit	(435,510)	(403,282)
Total stockholders' equity	158,180	139,424
Total liabilities and stockholders' equity	$ 184,899	$ 170,515