CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 7,088	$ 10,790
Cost of revenue	5,024	5,093
Total gross profit	2,064	5,697
Operating expenses:
Research and development	61,345	49,750
Selling, general and administrative	25,379	24,457
Total operating expenses	86,724	74,207
Loss from operations	(84,660)	(68,510)
Other income (expense), net
Interest expense	0	(3,255)
Interest income	16,561	5,113
Change in fair value of derivative warrant liabilities	(150,629)	(90,168)
Change in fair value of earn-out liabilities	2,518	(43,742)
Loss on extinguishment of debt	0	(426)
Total other expense, net	(131,550)	(132,478)
Net loss before provision for income taxes	(216,210)	(200,988)
Provision for income taxes	0	0
Net loss	$ (216,210)	$ (200,988)
Net loss per share attributable to common stockholders - basic (in $ per share)	$ (0.7)	$ (1.09)
Net loss per share attributable to common stockholders - diluted (in $ per share)	$ (0.7)	$ (1.09)
Weighted average shares used to compute net loss per share attributable to common stockholders - basic (in shares)	309,763	184,666
Weighted average shares used to compute net loss per share attributable to common stockholders - diluted (in shares)	309,763	184,666

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Cash flows from operating activities:
Net loss	$ (216,210)	$ (200,988)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	8,169	6,906
Stock-based compensation	17,605	13,069
Change in fair value of earn-out liabilities	(2,518)	43,742
Change in fair value of derivative warrant liabilities	150,629	90,168
Accretion of available-for-sale securities	(9,918)	(3,622)
Loss on extinguishment of debt	0	426
Amortization of debt issuance costs, commitment fees and accretion of final payment fees	0	844
Non-cash lease expense	1,582	1,909
Changes in operating assets and liabilities:
Accounts receivable	(124)	2,602
Prepaid expenses, other current assets and other assets	(4,440)	(2,434)
Deferred revenue	734	468
Accounts payable	111	(1,036)
Accrued expenses and operating lease liabilities	(4,163)	(2,681)
Net cash used in operating activities	(58,543)	(50,627)
Cash flows from investing activities:
Purchases of property and equipment	(18,676)	(11,098)
Purchases of available-for-sale securities	(635,652)	(224,764)
Maturities of available-for-sale securities	251,000	157,500
Net cash used in investing activities	(403,328)	(78,362)
Cash flows from financing activities:
Payments of principal of notes payable	0	(23,328)
Proceeds from sale of common stock through Common Stock Purchase Agreement	0	12,838
Proceeds from sale of common stock through ATM Offerings	346,719	97,500
Proceeds from sale of common stock through registered direct offering	0	96,000
Proceeds from sale of common stock from Quanta private placement transaction	35,000	0
Payments of offering costs	(888)	(1,833)
Net proceeds (payments) from tax withholdings on sell-to-cover equity award transactions	6,272	(6,272)
Proceeds from issuance of common stock upon exercise of stock options	1,992	552
Proceeds from issuance of common stock upon exercise of warrants	49,991	2
Net cash provided by financing activities	439,086	175,459
Effects of exchange rate changes on cash and cash equivalents	(38)	(188)
Net decrease in cash and cash equivalents	(22,823)	46,282
Cash and cash equivalents - beginning of period	67,674	21,392
Cash and cash equivalents - end of period	44,851	67,674
Supplemental disclosures of other cash flow information:
Cash paid for interest	0	2,350
Non-cash investing and financing activities:
Purchases of property and equipment recorded in accounts payable	2,254	466
Purchases of property and equipment recorded in accrued expenses	259	150
Non-cash addition to operating lease right-of-use asset and liability	0	2,268
Reclassification of earn-out liabilities to additional paid-in capital for vesting of Sponsor Vesting Shares	43,379	0
Reclassification of derivative liabilities to additional paid-in capital due to exercise of Public Warrants	141,130	0
Unrealized gain on short term investments	$ 923	$ 66

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 44,851	$ 67,674
Available-for-sale investments - short-term	398,660	124,420
Accounts receivable	2,551	2,427
Prepaid expenses	3,186	3,156
Other current assets	5,512	9,081
Total current assets	454,760	206,758
Available-for-sale investments - long-term	146,321	25,068
Property and equipment, net	57,051	44,643
Operating lease right-of-use assets	6,411	7,993
Other assets	2,031	325
Total assets	666,574	284,787
Current liabilities:
Accounts payable	3,488	1,590
Accrued expenses and other current liabilities	5,582	8,005
Current portion of deferred revenue	847	113
Current portion of operating lease liabilities	2,235	2,159
Total current liabilities	12,152	11,867
Deferred revenue, less current portion	698	698
Operating lease liabilities, less current portion	4,932	6,641
Derivative warrant liabilities	102,593	93,095
Earn-out liabilities	0	45,897
Total liabilities	120,375	158,198
Commitments and contingencies (Note 19)
Stockholders' equity:
Preferred stock, par value $0.0001 per share, 10,000,000 shares authorized, none outstanding	0	0
Common stock, par value $0.0001 per share, 1,000,000,000 shares authorized, 331,282,895 shares issued and outstanding at December 31, 2025 and 283,546,871 shares issued and outstanding at December 31, 2024	33	29
Additional paid-in capital	1,316,126	681,202
Accumulated other comprehensive income	997	105
Accumulated deficit	(770,957)	(554,747)
Total stockholders' equity	546,199	126,589
Total liabilities and stockholders' equity	$ 666,574	$ 284,787