Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 52,332	$ 75,218
Short-term investments	220,788	217,258
Prepaid expenses and other current assets	9,535	10,910
Total current assets	282,655	303,386
Long-term investments	29,510	80,673
Operating lease right-of-use asset	41,966	45,205
Property and equipment, net	78,858	86,056
Deposit placed in escrow	23,484	20,773
Restricted cash	10,292	10,292
Other long-term assets	3,828	2,325
Total assets	470,593	548,710
Current liabilities:
Accounts payable	4,851	5,394
Accrued and other current liabilities	26,824	30,129
Total current liabilities	31,675	35,523
Lease liability, noncurrent	79,241	83,247
Other long-term liabilities	15,116	7,761
Total liabilities	126,032	126,531
Commitments and Contingencies (Notes 6 and 7)
Stockholders’ equity:
Preferred stock, $0.001 par value: 10,000,000 shares authorized as of June 30, 2025 and December 31, 2024; no shares were issued and outstanding as of June 30, 2025 and December 31, 2024	0	0
Common stock, $0.001 par value: 400,000,000 shares authorized as of June 30, 2025 and December 31, 2024; 220,133,876 and 212,210,597 shares issued and outstanding as of June 30, 2025 and December 31, 2024, respectively	220	212
Additional paid-in capital	2,274,885	2,241,879
Accumulated deficit	(1,930,499)	(1,819,823)
Accumulated other comprehensive loss	(45)	(89)
Total stockholders’ equity	344,561	422,179
Total liabilities and stockholders’ equity	$ 470,593	$ 548,710