Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 133,118	$ 133,359
Marketable securities	138,002	58,685
Prepaid expenses and other current assets	2,965	2,193
Total current assets	274,085	194,237
Property and equipment, net	7,461	7,742
Right-of-use assets	59,643	63,492
Restricted cash	5,031	5,031
Long-term deposit and other assets	1,807	1,647
Total assets	348,027	272,149
Current liabilities:
Accounts payable	3,647	2,374
Accrued expenses and other current liabilities	11,181	10,716
Operating lease liability, current portion	3,898	3,246
Deferred revenue, current portion	9,934	10,137
Current portion of long-term debt		3,347
Total current liabilities	28,660	29,820
Deferred revenue, net of current portion	3,676	5,622
Operating lease liability, net of current portion	55,811	59,140
Long-term debt and accrued interest	30,647	26,700
Other long term liabilities	146
Total liabilities	118,940	121,282
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding at September 30, 2024 and December 31, 2023	0	0
Additional paid-in capital	568,368	398,459
Accumulated deficit	(339,287)	(247,597)
Total stockholders' equity	229,087	150,867
Total liabilities and stockholders' equity	348,027	272,149
Voting Common Stock
Stockholders' equity:
Common stock	5	4
Non-voting Common Stock
Stockholders' equity:
Common stock	$ 1	$ 1