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Cover
Aug. 29, 2024
Entity Addresses [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 29, 2024
Current Fiscal Year End Date --12-31
Entity File Number 000-22873
Entity Registrant Name Oruka Therapeutics, Inc.
Entity Central Index Key 0000907654
Entity Tax Identification Number 36-3855489
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 855 Oak Grove Avenue
Entity Address, Address Line Two Suite 100
Entity Address, City or Town Menlo Park
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94025
City Area Code 650
Local Phone Number 606-7910
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol ORKA
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Former Address [Member]  
Entity Addresses [Line Items]  
Entity Registrant Name ARCA biopharma, Inc.
Entity Address, Address Line One 10170 Church Ranch Way
Entity Address, Address Line Two Suite 100
Entity Address, City or Town Westminster
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80021