Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 88,219		$ 53,229
Short-term marketable securities	274,997		212,481
Prepaid expenses and other current assets	6,755		5,061
Total current assets	369,971		270,771
Long-term marketable securities	26,688		7,460
Operating lease, right-of-use assets	21,057		21,998
Property and equipment, net	7,357		8,344
Other assets	4,862		4,864
Total assets	429,935		313,437
Current liabilities:
Accounts payable	8,975		10,655
Accrued expenses and other current liabilities	29,553		26,127
Operating lease liabilities	1,475		1,386
Total current liabilities	40,003		38,168
Operating lease liabilities, net of current portion	16,709		17,467
Total liabilities	56,712		55,635
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, value
Common stock, $0.001 par value; 300,000,000 shares authorized; 109,343,224 and 86,124,249 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	109		86
Additional paid-in capital	980,108		801,059
Accumulated other comprehensive income (loss)	(192)		246
Accumulated deficit	(720,922)		(603,624)
Total stockholders’ equity	373,223	$ 422,334	257,802
Total liabilities and stockholders’ equity	429,935		313,437
Series A Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value	60,035		60,035
Series B Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value	$ 54,085