v3.26.1
LICENSE AGREEMENTS AND ASSET PURCHASE AGREEMENTS (Details) - Bioprojet - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2025
Oct. 31, 2022
Mar. 31, 2022
Jan. 31, 2021
Oct. 31, 2020
Nov. 30, 2019
Aug. 31, 2019
Dec. 31, 2024
Apr. 30, 2024
Jul. 31, 2022
Feb. 28, 2019
License Agreements and Asset Purchase Agreements                      
Licensing agreement milestone fees             $ 2,000        
License agreement milestone payments paid           $ 75,000 2,000        
License agreement, additional milestone payment due             102,000        
UNITED STATES                      
License Agreements and Asset Purchase Agreements                      
Amount of Aggregate Net Sales Attaining in US     $ 500,000                
Upon Acceptance by FDA of Pitolisant's                      
License Agreements and Asset Purchase Agreements                      
License agreement, milestone payment due                     $ 50,000
License agreement, upfront non-refundable licensing fees paid   $ 30,000                  
License agreement, maximum additional milestone payment due                   $ 155,000  
Upon FDA Approval of WAKIX                      
License Agreements and Asset Purchase Agreements                      
License agreement, milestone payment due             77,000        
Licensing agreement milestone fees             $ 2,000        
License agreement milestone payments paid       $ 100,000 $ 2,000            
Orexin-2 receptor agonist (OX2R)                      
License Agreements and Asset Purchase Agreements                      
License agreement milestone payments paid $ 4,250                    
Payment of upfront license fee               $ 25,500      
Amount of fee payable upon achieving development and regulatory milestones                 $ 123,250    
Amount of fees payable upon achieving sale-based milestones                 $ 240,000    
Attaining $500,000 Aggregate Net Sales in US | Upon FDA Approval of WAKIX | UNITED STATES                      
License Agreements and Asset Purchase Agreements                      
Final payment paid     $ 40,000