CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Operating activities
Net loss	$ (595,909)	$ (199,203)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	16,314	11,313
Loss on disposal of property and equipment	2,473	591
Loss on issuance of convertible preferred stock	355,551	0
Stock based compensation	16,819	9,172
Warrant expense	308	0
Non-cash interest expense	1,508	1,586
Non-cash lease expense	185	330
Changes in operating assets and liabilities:
Accounts receivable	(5,531)	(2,626)
Prepaid expenses and other current assets	3,653	3,858
Other assets and liabilities	(6)	19
Accounts payable, accrued expenses and current liabilities	17,990	7,564
Operating lease liabilities	(27)	(226)
Deferred revenue	3,286	2,360
Net cash used in operating activities	(183,386)	(165,262)
Investing activities
Purchases of property and equipment	(25,663)	(51,681)
Proceeds from sale of property and equipment	1,296	380
Net cash used in investing activities	(24,367)	(51,301)
Financing activities
Proceeds from sale-leaseback transaction	32,658	0
Proceeds from the issuance of promissory note	0	15,501
Payment of debt issuance costs	0	(150)
Repayment of borrowings	(2,103)	(685)
Issuance of common stock	2,095	1,231
Principal payments on finance lease obligations	(46)	(39)
Stock issuance costs	(7,005)	0
Repurchase of common stock	0	(530)
Net cash provided by financing activities	598,380	15,328
Effect of currency translation on cash, cash equivalents and restricted cash	(20)	(24)
Increase (decrease) in cash, cash equivalents and restricted cash	390,607	(201,259)
Cash, cash equivalents and restricted cash at beginning of period	302,025	254,136
Cash, cash equivalents and restricted cash at end of period	692,632	52,877
Supplemental disclosure of cash flow information
Cash paid for interest	7,946	6,842
Cash paid for taxes	117	34
Non-cash investing and financing activities
Right-of-use assets recognized for new leases	1,243	796
Right-of-use assets modified for amendments	6	(1,138)
Property and equipment recorded in accounts payable	4,147	12,319
Stock issuance costs recorded in accounts payable and accrued liabilities	1,773	1,405
Deferred offering costs included in accounts payable and accrued expenses and other liabilities	6,181	0
Series C Preferred Stock
Financing activities
Proceeds from convertible preferred stock	150,406	0
Series C-1 Preferred Stock
Financing activities
Proceeds from convertible preferred stock	$ 422,375	$ 0