Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Sep. 30, 2026 |
May 27, 2026 |
Dec. 31, 2025 |
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| Allowance for doubtful accounts | $ 2,998 | $ 460 | |||||||||||||||||||||
| Common stock, par value (in dollars per share) | $ 0.0001 | $ 0.0001 | |||||||||||||||||||||
| Common stock, authorized (in shares) | 600,000,000 | 600,000,000 | |||||||||||||||||||||
| Common stock, issued (in shares) | 295,537,217 | 280,045,459 | |||||||||||||||||||||
| Common stock, outstanding (in shares) | 295,537,217 | 280,045,459 | |||||||||||||||||||||
| Accounts receivable, current | [1],[2] | $ 634,743 | $ 371,796 | ||||||||||||||||||||
| Contract assets, current | [3] | 792,833 | 178,928 | ||||||||||||||||||||
| Prepaid expenses and other current assets | [1],[4] | 178,244 | 49,805 | ||||||||||||||||||||
| Contract assets, non-current | [5] | 65,813 | 62,258 | ||||||||||||||||||||
| Other long-term assets | [1],[6] | 372,115 | 57,203 | ||||||||||||||||||||
| Accrued warranty, current | [7] | 70,267 | 20,013 | ||||||||||||||||||||
| Operating lease liabilities, current | [1],[8] | 479,782 | 222,254 | ||||||||||||||||||||
| Deferred revenue and customer deposits, current | [9] | 278,985 | 100,975 | ||||||||||||||||||||
| Deferred cost of revenue, current | [10] | 95,743 | $ 30,651 | ||||||||||||||||||||
| Class B common stock | |||||||||||||||||||||||
| Common stock, authorized (in shares) | 470,092,742 | ||||||||||||||||||||||
| Common stock, issued (in shares) | 0 | ||||||||||||||||||||||
| Common stock, outstanding (in shares) | 0 | ||||||||||||||||||||||
| Related Party | |||||||||||||||||||||||
| Accounts receivable, current | 195,531 | $ 151,932 | |||||||||||||||||||||
| Contract assets, current | 73,685 | 2,967 | |||||||||||||||||||||
| Prepaid expenses and other current assets | 0 | 1,247 | |||||||||||||||||||||
| Contract assets, non-current | 51,749 | 48,763 | |||||||||||||||||||||
| Other long-term assets | 0 | 5,968 | |||||||||||||||||||||
| Accrued warranty, current | 5,002 | 799 | |||||||||||||||||||||
| Operating lease liabilities, current | 2,069 | 39 | |||||||||||||||||||||
| Deferred revenue and customer deposits, current | 8,096 | 6,879 | |||||||||||||||||||||
| Deferred cost of revenue, current | $ 20,494 | $ 0 | |||||||||||||||||||||
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