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Commitments and Contingencies (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 19, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Apr. 22, 2024
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  |  | $ 200 |  |
Purchase Commitment, Description |  |  |  |  |  | The majority of the Company’s outstanding inventory purchase orders and preauthorized commitments to procure strategic components based on the Company’s expected demand are placed with the Company’s primary third party contract manufacturer and a semiconductor supplier. |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  |  |  |  |  | $ 25,000 |
Shares Issued |  | 106,754,588 |  | 106,754,588 |  | 48,376,052 | 17,454,353 |
Business Combination Advisory Fees | $ 1,000,000 |  |  |  |  |  |  |
Business Combination Private Placement Fee | $ 500,000 |  |  |  |  |  |  |
Duration To Pay Business Combination private placement fee | 2 days |  |  |  |  |  |  |
Threshold Limit For Sale Transaction Fee For Transaction Value | $ 3,000,000 |  |  |  |  |  |  |
Threshold Limit For Sale Transaction Fee For Transaction Value Percentage | 1.00% |  |  |  |  |  |  |
Common stock, par value per share |  | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 | $ 0.00001 |
Inventory purchases related to purchase obligations |  | $ 46 | $ 346 | $ 150 | $ 4,088 | $ 4,300 | $ 4,400 |
Deferred Offering Costs And Accrued Liabilities Associated With Contract |  |  |  |  |  | 600 |  |
Advisory fee |  |  |  |  |  | $ 800 |  |
Reset price per share |  |  |  |  |  | $ 10 |  |
Floor price per share |  |  |  |  |  | 1 |  |
Number of share price held at reset date |  |  |  |  |  | $ 10 |  |
Number of sharing share held |  |  |  |  |  | 300,000 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Stock issued during period, shares, restricted stock award, gross |  |  |  |  |  | 6,936,285 |  |
Earnout Common Stock |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Shares Issued |  |  |  |  |  |  | 16,300,000 |
accrued losses [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss Contingency, Accrual, Noncurrent |  |  |  |  |  | $ 600 | $ 3,600 |
Blaize Holdings, Inc. [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Business acquisition, share price |  |  |  |  |  | $ 10 |  |
Backstop Subscription Agreement [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Trust Amount Before Payment Of Expenses |  |  |  |  |  |  |  | $ 30,000,000
Backstop Subscription Agreement [Member] | Class A common stock [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Per Share Divided Factor Of Number Of Shares For Merger |  |  |  |  |  |  |  | 10.00%
letter agreement [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Stock Forfeited During Period Share |  |  |  |  |  |  |  | 2,000,000
New Blaize [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Common stock, par value per share |  |  |  |  |  | $ 10 |  |

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