Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents		$ 46,750	$ 50,761
Marketable securities		104,306	69,908
Accounts receivable		512	879
Prepaid expenses and other current assets		4,967	4,464
Total current assets		156,535	126,012
Restricted cash		984	1,450
Property and equipment, net		31,301	26,553
Operating lease right-of-use assets		5,447	5,261
Other assets		117	131
Total assets		194,384	159,407
Current liabilities:
Accounts payable		1,011	1,455
Accrued expenses and other current liabilities		12,432	11,354
Operating lease liabilities, current		2,153	1,916
Debt, current portion		656	1,065
Second lien loans		12,025	10,872
Total current liabilities		28,277	26,662
Liabilities, redeemable convertible preferred stock and stockholders’ deficit
Debt, net of current portion		29,460	29,878
Operating lease liabilities, noncurrent		3,509	3,584
Common stock warrants		97,734	158,346
Other liabilities		1,137	804
Total liabilities		160,117	219,274
Commitments and contingencies (Note 9)
Redeemable convertible preferred stock		223,185	223,185
Stockholders’ deficit
Common stock, $0.0001 par value; 1,980,000 shares authorized; 194,1731 and 175,4401 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively	[1]	19	17
Additional paid-in capital		625,883	570,578
Accumulated other comprehensive (loss) income		(118)	22
Accumulated deficit		(814,702)	(853,669)
Total stockholders’ deficit		(188,918)	(283,052)
Total liabilities, redeemable convertible preferred stock and stockholders’ deficit		$ 194,384	$ 159,407

[1] 1 Excludes 6,250,000 shares legally issued and outstanding related to sponsor earn out securities (see Note 3).