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Option Agreements and License Agreements (Details) - USD ($) $ in Millions | 3 Months Ended | 8 Months Ended | 9 Months Ended | 11 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2025 | Dec. 31, 2024
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Expenses | $ 9.6 | $ 13.4 | $ 33.8 | $ 15.3 |
Paruka Warrant Obligation [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Warrant purchase percentage |  |  |  |  | 1.00%
ORKA-002 [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Non-refundable milestone payments |  |  |  | 4.0 |
Milestone consideration paid | 3.0 |  |  | 3.0 |
Research and development expenses |  | 3.8 | 10.7 | 0.1 |
Milestone payment |  |  |  | 2.5 |
ORKA-001 [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Non-refundable milestone payments |  |  |  | $ 7.0 |
Development costs |  |  |  | 50.00% |
Research and development expenses |  | $ 0.8 | $ 14.0 |  |
Related Party [Member] | ORKA-002 [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Accounts payable and other current liabilities |  |  |  |  | $ 2.7
Related Party [Member] | ORKA-001 [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Accounts payable and other current liabilities |  |  |  |  | 12.4
Paragon [Member] | ORKA-002 [Member] | Research and Development Expense [Member] | Exercising Option [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Nonrefundable research initiation fee |  |  |  |  | 0.8
Paragon [Member] | ORKA-002 [Member] | Research and Development Expense [Member] | Achievement of Development Candidate [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Milestone consideration paid |  |  |  |  | $ 1.5
Paragon [Member] | Option Agreement [Member] | Antibody Products [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Royalty payable on product sales, description |  |  |  |  | low single-digit percentage royalty for antibody products
Paragon [Member] | ORKA-001 [Member] | Research and Development Expense [Member] | Exercising Option [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Nonrefundable research initiation fee |  |  |  |  | $ 0.8
Paragon [Member] | ORKA-001 [Member] | Research and Development Expense [Member] | Achievement of Development Candidate [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Milestone consideration paid |  |  |  |  | 1.5
Paragon [Member] | ORKA-001 [Member] | Research and Development Expense [Member] | First Dosing of Human Patient in Phase1Trial Milestone [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Milestone consideration paid |  |  |  |  | 2.5
Maximum [Member] | Paragon [Member] | Clinical Development Milestones [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Non-refundable milestone payments |  |  |  |  | 12.0
Maximum [Member] | Paragon [Member] | Regulatory Milestones Member [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Non-refundable milestone payments |  |  |  |  | 10.0
Maximum [Member] | Paragon [Member] | ORKA-002 [Member] | Clinical Development Milestones [Member] |  |  |  |  |
Option Agreements and License Agreements [Line Items] |  |  |  |  |
Non-refundable milestone payments |  |  |  |  | $ 12.0

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