v3.26.1
Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Income Tax [Line Items]    
Provision for income taxes $ 0 $ 0
Income taxes paid $ 0 $ 0
At statutory rate, Percent 21.00% 21.00%
Operating loss carryforwards, federal $ 534,500,000 $ 502,200,000
Operating loss carryforwards, state 501,900,000 487,800,000
Increase in valuation allowance 6,699,000 12,156,000
Legacy Millendo    
Income Tax [Line Items]    
Operating loss carryforwards, federal 455,800  
Research Tax Credit Carryforward | Domestic Tax Jurisdiction [Member]    
Income Tax [Line Items]    
Tax credit carryforwards 14,700,000 14,100,000
Research Tax Credit Carryforward | State and Local Jurisdiction [Member]    
Income Tax [Line Items]    
Tax credit carryforwards 4,400,000 $ 4,100,000
Orphan Drug Credit    
Income Tax [Line Items]    
Tax credit carryforwards 7,400,000  
Not Subject to Expiration    
Income Tax [Line Items]    
Operating loss carryforwards, federal 313,300,000  
Not Subject to Expiration | Research Tax Credit Carryforward | State and Local Jurisdiction [Member]    
Income Tax [Line Items]    
Tax credit carryforwards $ 3,300,000