v3.26.1
SEGMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]        
Revenue $ 212 $ 212 $ 858 $ 636
Research and development 2,871 5,725 19,597 41,507
Segment net loss (8,278) (9,439) $ (8,978) (57,775)
Number Of Reportable Segments Not Disclosed Flag     true  
Reporting Segment        
Segment Reporting Information [Line Items]        
Revenue 212 212 $ 858 636
General and administrative, excluding personnel expenses 4,223 1,525 6,078 6,654
General and administrative, personnel expenses (including share-based compensation) 1,851 2,632 8,247 12,971
Other segment items (455) (231) (24,086) (2,721)
Segment net loss (8,278) (9,439) (8,978) (57,775)
RLYB212 | Reporting Segment        
Segment Reporting Information [Line Items]        
Research and development 56 2,438 6,291 21,287
RLYB116 | Reporting Segment        
Segment Reporting Information [Line Items]        
Research and development 396 619 3,786 4,841
Other program candidates | Reporting Segment        
Segment Reporting Information [Line Items]        
Research and development 2 (163) (29) 1,901
Personnel (including share-based compensation) | Reporting Segment        
Segment Reporting Information [Line Items]        
Research and development 2,280 2,589 8,798 12,488
Other | Reporting Segment        
Segment Reporting Information [Line Items]        
Research and development $ 137 $ 242 $ 751 $ 990