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v3.25.3

Nature of the Business and Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 8 Months Ended | 9 Months Ended | 11 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 03, 2025 | Sep. 17, 2025 | Sep. 03, 2024 | Nov. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 13, 2024
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  |  |  |  | $ 0.001 |  |  | $ 0.001 | $ 0.001 |
Additional paid-in capital transaction costs |  |  | $ 20,500 |  |  |  |  |  |  |
Gross offering proceeds |  |  |  |  |  |  |  | $ 109 |  |
Incurred net loss |  |  |  |  | $ (30,277) | $ (28,623) | (57,943) | (75,850) |  |
Net cash operating activities |  |  |  |  |  |  | (39,019) | (65,616) |  |
Cash, cash equivalents, and marketable securities |  |  |  |  | 500,900 |  |  | 500,900 |  |
Pre-funded Warrants [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate gross proceeds |  |  |  |  |  |  |  |  | $ 188,700 |
Purchase price per share (in Dollars per share) |  |  |  |  |  |  |  |  |  | $ 22.999
Net of issuance costs |  |  |  |  |  |  |  |  | $ 11,900 |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Exchange ratio |  |  |  |  |  |  |  |  | 6.8569 |
Conversion ratio |  |  |  |  |  |  |  |  | 83.3332:1 |
Prefunded warrants to purchase an aggregate shares (in Shares) |  |  |  |  |  |  |  |  | 680,000 |
ARCA [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Cash Balance |  |  |  |  | 4,940 |  |  | 4,940 |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Convertible shares (in Shares) |  |  |  | 2,439,000 |  |  |  |  |  |
Incurred net loss |  |  |  |  | $ (24,042) | $ (21,936) | $ (47,192) | (59,813) |  |
Series A Non-Voting Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price per share (in Dollars per share) |  |  |  |  |  |  |  |  |  | 23,000
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Convertible shares (in Shares) |  |  |  | 2,439 |  |  |  |  | 1,000 |
Oruka Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Reverse stock split |  |  | 1-for-12 |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  |  | $ 0.001 |  |  |  |  |  |  |
Pre-Merger Oruka [Member] | Pre-funded Warrants [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate gross proceeds |  |  | $ 275,000 |  |  |  |  |  |  |
Proceeds from issuance of convertible note |  |  | $ 25,000 |  |  |  |  |  |  |
Oruka Series A Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  |  |  |  |  |  |  |  | $ 0.0001 |
ARCA Series B non-voting convertible preferred stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  |  |  |  |  |  |  |  | 0.001 |
PIPE Financing [Member] | Pre-funded Warrants [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  | $ 14.999 |  |  |  |  |  |  |  |
Aggregate gross proceeds |  |  |  |  |  |  |  | 169,600 |  |
Net of issuance costs |  |  |  |  |  |  |  | $ 10,400 |  |
PIPE Financing [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate of purchased shares (in Shares) |  | 10,933,405 |  |  |  |  |  |  |  |
Purchase price per share (in Dollars per share) |  | $ 15 |  |  |  |  |  |  |  | $ 23
Aggregate shares (in Shares) |  | 1,066,666 |  |  |  |  |  |  |  |
PIPE Financing [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate of purchased shares (in Shares) |  |  |  |  |  |  |  |  |  | 5,600,000
PIPE Financing [Member] | Series A Non-Voting Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in Dollars per share) |  |  |  |  |  |  |  |  | $ 0.001 |
Aggregate shares (in Shares) |  |  |  |  |  |  |  |  | 2,439 |
PIPE Financing [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price per share (in Dollars per share) |  |  |  |  |  | $ 23,000 | $ 23,000 |  |  |
ATM Offering [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Nature of the Business and Basis of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Gross offering proceeds | $ 200,000 |  |  |  |  |  |  |  |  |

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