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Nature of the Business and Basis of Presentation (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 11 Months Ended
Sep. 03, 2024
$ / shares
Apr. 03, 2024
USD ($)
Sep. 30, 2024
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Feb. 06, 2024
$ / shares
Nature of the Business and Basis of Presentation [Line Items]          
Common stock, par value (in Dollars per share) | $ / shares       $ 0.001 $ 0.001
Additional paid-in capital transaction costs (in Dollars) | $   $ 20,500      
Pre-funded warrants of common stock shares | shares       5,522,207  
Warrants exchange | shares       9,664,208  
Net loss (in Dollars) | $       $ (83,724)  
Net cash operating activities (in Dollars) | $       (57,837)  
Cash, cash equivalents, and marketable securities (in Dollars) | $       393,700  
Pre-funded Warrants [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Aggregate gross proceeds (in Dollars) | $       $ 188,700  
Purchase price per share (in Dollars per share) | $ / shares       $ 22.999  
Net of issuance costs (in Dollars) | $       $ 11,900  
Series B Preferred Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Conversion ratio       83:3332:1  
Net loss (in Dollars) | $ [1]       $ (16,769)  
Common Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Investors shares | shares       22,784,139  
Exchange shares | shares       4,764,032  
Issuance of shares | shares       2,722,207  
Prefunded warrants to purchase an aggregate shares | shares       680,000  
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) | $ / shares       $ 23,000  
Series A Preferred Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Purchase price per share (in Dollars per share) | $ / shares     $ 23,000    
Net loss (in Dollars) | $ [2]       $ (1,918)  
Common Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Net loss (in Dollars) | $       $ (65,037)  
Common Stock [Member] | Series A Preferred Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Convertible shares | shares       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) | $ / shares $ 0.001        
Pre-Merger Oruka [Member] | Pre-funded Warrants [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Aggregate gross proceeds (in Dollars) | $   275,000      
Proceeds from Issuance of convertible note (in Dollars) | $   $ 25,000      
Pre-Merger Oruka [Member] | Common Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Exchange shares | shares       39,873,706  
ARCA common stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Exchange ratio       6.8569  
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) | $ / shares       $ 0.0001  
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) | $ / shares       $ 0.001  
PIPE Financing [Member] | Common Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Aggregate of purchased shares | shares       5,600,000  
Purchase price per share (in Dollars per share) | $ / shares       $ 23  
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) | $ / shares       $ 0.001  
Aggregate shares | shares       2,439  
PIPE Financing [Member] | Series A Preferred Stock [Member]          
Nature of the Business and Basis of Presentation [Line Items]          
Exchange shares | shares     2,439    
[1] The weighted-average number of shares of as-converted Company Series B Preferred Stock used in the loss allocation was 4,328,844 for the period from February 6, 2024 (inception) to December 31, 2024.
[2] The weighted-average number of shares of as-converted Company Series A Preferred Stock used in the loss allocation was 495,191 for the period from February 6, 2024 (inception) to December 31, 2024.