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v3.25.1

Business Combination - Earnout Awards (Details) |  |  | 8 Months Ended | 12 Months Ended
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May 09, 2024 tranche D $ / shares shares | May 08, 2024 shares | Dec. 31, 2024 USD ($) D shares | Dec. 31, 2024 USD ($) D | Dec. 31, 2023 USD ($)
Reverse Recapitalization [Line Items] |  |  |  |  |
Recapitalization, equity subjected | 10.00% |  |  |  |
Recapitalization vesting period | 5 years |  |  |  |
Contingent consideration, (in shares) | shares | 15,000,000 | 78,996,459 |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 10 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Stock-based compensation | $ |  |  |  | $ 12,484,000 | $ 777,000
Reverse recapitalization, shares forfeited, consideration issued | $ |  |  | $ 0 |  |
Reverse recapitalization, shares forfeited, shares issued | shares |  |  | 0 |  |
Recapitalization exchange ratio | 6.062 |  |  |  |
Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reserved for future issuance (in shares) | shares | 10,432,749 |  |  |  |
Common Class A | Employee Stock Option |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reserved for future issuance (in shares) | shares | 10,432,749 |  |  |  |
Earnout Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Vesting tranches | tranche | 3 |  |  |  |
Earnout shares fair value | $ |  |  | $ 261,716,000 | 261,716,000 |
Stock-based compensation | $ |  |  |  | 7,784,000 |
Earnout Shares | Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reverse recapitalization, number of shares forfeited during period (in shares) | shares |  |  | 300,000 |  |
Founder Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Recapitalization vesting period | 5 years |  |  |  |
Contingent consideration, (in shares) | shares | 1,450,000 |  |  |  |
Vesting tranches | tranche | 4 |  |  |  |
Vesting per triggering event (in shares) | shares | 12,500,000 |  |  |  |
Earnout shares fair value | $ |  |  | $ 226,219,000 | $ 226,219,000 |
Earnout Shares and Founder Shares | Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Trading day threshold |  |  | 20 | 20 |
Trading day period |  |  | 60 | 60 |
Reverse Recapitalization Earnout Triggering Event One | Earnout Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 7,500,000 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 12 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event One | Founder Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 6,250,000 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 10 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event Two | Earnout Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 5,000,000 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 14 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event Two | Founder Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 3,125,000 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 12 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event Three | Earnout Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 2,500,000 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 16 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event Three | Founder Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 1,562,500 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 14 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization Earnout Triggering Event Four | Founder Shares |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Contingent consideration, (in shares) | shares | 1,562,500 |  |  |  |
Stock price threshold (in dollars per share) | $ / shares | $ 16 |  |  |  |
Trading day threshold | 20 |  |  |  |
Trading day period | 60 |  |  |  |
Reverse Recapitalization, Earnout Triggering Events met between November 12, 2024 and November 13, 2024 | Earnout Shares | Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reveres recapitalization, shares issued (in shares) | shares |  |  | 14,266,446 |  |
Reverse Recapitalization, Earnout Shares Attributable to Legacy Oklo Vested Options | Earnout Shares | Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reveres recapitalization, shares issued (in shares) | shares |  |  | 433,348 |  |
Reverse Recapitalization, Earnout Shares Attributable to Legacy Oklo Vested Options | Founder Shares | Common Class A |  |  |  |  |
Reverse Recapitalization [Line Items] |  |  |  |  |
Reveres recapitalization, shares issued (in shares) | shares |  |  | 12,500,000 |  |

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