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v3.25.3

Merger and Reverse Recapitalization - Additional Information (Details) |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 13, 2025 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) Days $ / shares shares | Dec. 31, 2024 shares | Dec. 31, 2023 shares
Business Acquisition [Line Items] |  |  |  |  |
Warrants outstanding at merger |  |  |  | 756,172,000 | 1,096,730,000
Common stock shares issued |  | 106,754,588 | 106,754,588 | 48,376,052 | 17,454,353
Shares pledged to secure note receivable | 2,000,000 |  |  |  |
Shareholder note, outstanding principal | $ |  | $ 8,600,000 | $ 8,600,000 |  |
Payment of Shareholder note receivable | $ |  | 0 | $ 200,000 |  |
Cash escrow held for redemption | $ | $ 11.57 |  |  |  |
Earnout Shares |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Earnout commencement period |  |  | Jan. 13, 2025 |  |
Earnout ending period |  |  | Jan. 13, 2030 |  |
Number of consecutive trading days | Days |  |  | 30 |  |
Number of trading days | Days |  |  | 20 |  |
Fair value of earnout shares | $ |  |  | $ 82,900,000 |  |
Stock based compensation expense | $ |  | $ 3,800,000 | $ 11,400,000 |  |
Shares forfeited during the period |  | 182,180 | 237,669 |  |
Service period |  |  | 5 years |  |
Uunrecognized compensation cost | $ |  | $ 68,600,000 | $ 68,600,000 |  |
Put Option |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Redemption value per share | $ / shares | $ 13.07 |  |  |  |
Common Stock [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares issued for common stock |  | 769,231 | 873,486 |  |
Common stock shares issued |  |  |  | 17,519,999 |
Redemption value per share | $ / shares | $ 11.57 |  |  |  |
Common Stock [Member] | Earnout Shares | Tranche One |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock price per share | $ / shares |  | $ 12.5 | $ 12.5 |  |
Common Stock [Member] | Earnout Shares | Tranche Two |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock price per share | $ / shares |  | 15 | 15 |  |
Common Stock [Member] | Earnout Shares | Tranche Three |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock price per share | $ / shares |  | 17.5 | 17.5 |  |
Common Stock [Member] | Earnout Shares | Tranche Four |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock price per share | $ / shares |  | $ 20 | $ 20 |  |
Public Warrants |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Warrants outstanding at merger | 28,750,000 |  |  |  |
Private Placement Warrants |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Warrants outstanding at merger | 898,250 |  |  |  |
Non Redemption Agreement Shares |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Guaranteed redemption value per share | $ / shares | $ 13.07 |  |  |  |
PIPE Subscription Agreements [Member] | Blaize Class A Common Stock |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares issued for common stock | 1,529,500 |  |  |  |
Price per share of PIPE issuance | $ / shares | $ 10 |  |  |  |
BurTech LP |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shareholder note receivable, principal amount | $ | $ 8,800,000 |  |  |  |
Common stock shares issued | 750,000 |  |  |  |
Interest rate on shareholder note | 7.00% |  |  |  |
Sponsor Gurantee |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Incremental redemption guarantee per share | $ / shares | $ 1.5 |  |  |  |
Sponsor [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Incremental redemption guarantee per share | $ / shares | $ 1.5 |  |  |  |
Burkhan [Member] | Earnout Shares | Tranche One |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of earnout share awards |  |  | 650,000 |  |
Burkhan [Member] | Earnout Shares | Tranche Two |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 650,000 |  |
Burkhan [Member] | Earnout Shares | Tranche Three |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 650,000 |  |
Burkhan [Member] | Earnout Shares | Tranche Four |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 650,000 |  |
Bur Tech |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Merger exchange ratio | 0.78 |  |  |  |
Legacy Blaize Shareholders [Member] | Earnout Shares | Tranche One |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of earnout share awards |  |  | 3,750,000 |  |
Legacy Blaize Shareholders [Member] | Earnout Shares | Tranche Two |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 3,750,000 |  |
Legacy Blaize Shareholders [Member] | Earnout Shares | Tranche Three |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 3,750,000 |  |
Legacy Blaize Shareholders [Member] | Earnout Shares | Tranche Four |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Issuance of additional earnout share awards |  |  | 3,750,000 |  |

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