CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 27,763	$ 44,851
Available-for-sale investments - short-term	365,946	398,660
Accounts receivable	3,865	2,551
Prepaid expenses	4,215	3,186
Other current assets	12,601	5,512
Total current assets	414,390	454,760
Available-for-sale investments - long-term	147,586	146,321
Property and equipment, net	75,302	57,051
Operating lease right-of-use assets	6,929	6,411
Other assets	4,026	2,031
Total assets	648,233	666,574
Current liabilities:
Accounts payable	14,001	3,488
Accrued expenses and other current liabilities	6,676	5,582
Current derivative warrant liabilities	78,407
Current portion of deferred revenue	3,316	847
Current portion of operating lease liabilities	2,657	2,235
Total current liabilities	105,057	12,152
Deferred revenue, less current portion	698	698
Operating lease liabilities, less current portion	5,044	4,932
Derivative warrant liabilities		102,593
Total liabilities	110,799	120,375
Commitments and contingencies (Note 16)
Stockholders' equity:
Preferred stock, par value $0.0001 per share, 10,000,000 shares authorized, none outstanding
Common stock, par value $0.0001 per share, 1,000,000,000 shares authorized, 333,676,881 shares issued and outstanding at June 30, 2026 and 331,282,895 shares issued and outstanding at December 31, 2025	33	33
Additional paid-in capital	1,329,607	1,316,126
Accumulated other comprehensive (loss) income	(1,752)	997
Accumulated deficit	(790,454)	(770,957)
Total stockholders' equity	537,434	546,199
Total liabilities and stockholders' equity	$ 648,233	$ 666,574