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Reverse Merger - Schedule of Merger and After Redemptions (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2025
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Cash – GAMC trust and cash (net of redemption) (in Dollars) |  | $ 567 |  |
Cash – PIPE Financing (in Dollars) |  | 4,701 |  |
Total gross proceeds (in Dollars) |  | $ 5,268 |  |
Common stock - GAMC common stock |  | 7,273,159 |  |
Common stock - upon issuance to vendor for services rendered related to the Merger |  | 25,000 |  |
The Merger and PIPE shares |  | 8,393,279 |  |
Common stock - Legacy Bolt |  | 3,335,864 |  |
Total shares of the Company’s Common stock outstanding immediately after the Merger |  | 1,714,792 | 166,793 | 2,061,779
Golden Arrow Merger Corp. (“GAMC”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Less: redemption of GAMC common stock |  | (492,278) |  |
Common stock - upon of settlement of GAMC liability for underwriting commission |  | 625,000 |  |
Total shares of the Company’s Common stock outstanding immediately after the Merger | [1] | 32,315,550 |  |
Bolt Threads, Inc. (“Legacy Bolt”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock - upon of settlement of Legacy Bolt liability for contract termination |  | 750,000 |  |
Bolt Threads, Inc. (“Legacy Bolt”) [Member] | Convertible Notes [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock - net exercise of Legacy Bolt Bridge Warrants |  | 10,451,111 |  |
Bolt Threads, Inc. (“Legacy Bolt”) [Member] | Bridge Warrant [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock - net exercise of Legacy Bolt Bridge Warrants |  | 1,336,723 |  |
Class A Common Stock [Member] | Golden Arrow Merger Corp. (“GAMC”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock, shares outstanding |  | 7,047,500 |  |
Class B Common Stock [Member] | Golden Arrow Merger Corp. (“GAMC”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock, shares outstanding |  | 140,000 |  |
Class A Redeemable Common Stock [Member] | Golden Arrow Merger Corp. (“GAMC”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Common stock, shares outstanding |  | 577,937 |  |
Convertible Preferred Stock [Member] | Bolt Threads, Inc. (“Legacy Bolt”) [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Shares issued in PIPE Financing |  | 8,048,573 |  |
PIPE Financing [Member] |  |  |  |
Reverse Merger - Schedule of Merger and After Redemptions (Details) [Line Items] |  |  |  |
Shares issued in PIPE Financing |  | 470,120 |  |
[1] | Presented without giving effect to the Reverse Stock Split. After giving effect to the 1-for-20 Reverse Stock Split discussed in Note 1, the total shares of the Company's Common stock outstanding immediately after the Merger was 1,616,355.

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