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Nature of the Business and Basis of Presentation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended 11 Months Ended
Sep. 03, 2024
Nov. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Sep. 13, 2024
Aug. 29, 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 Cost $ 20,500                  
Incurred net loss     $ (24,574) $ (22,243) $ (29,320) $ (45,573)        
Net cash operating activities         (11,201) (44,014)        
Cash, cash equivalents, and marketable securities     351,500     351,500        
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      
ARCA [Member]                    
Nature of the Business and Basis of Presentation [Line Items]                    
Cash Balance                   $ 4,940
Common Stock [Member]                    
Nature of the Business and Basis of Presentation [Line Items]                    
Convertible shares (in Shares)   2,439,000                
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)                 $ 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] | 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    
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      
Incurred net loss     $ (19,327) $ (22,243) $ (29,320) $ (35,805)        
Common Stock [Member] | PIPE Financing [Member]                    
Nature of the Business and Basis of Presentation [Line Items]                    
Purchase price per share (in Dollars per share)                 $ 23