v3.26.1
SEGMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]            
Revenue $ 0 $ 212 $ 212 $ 424 $ 858 $ 636
Research and development 758 6,074 3,629 11,799 19,597 41,507
Segment net income (loss) 43,665 (9,703) 35,387 (19,142) $ (8,978) (57,775)
Number Of Reportable Segments Not Disclosed Flag         true  
Reporting Segment            
Segment Reporting Information [Line Items]            
Revenue 0 212 212 424 $ 858 636
General and administrative, excluding personnel expenses 3,726 1,472 7,949 2,997 6,078 6,654
General and administrative, personnel expenses (including share-based compensation) 1,169 2,723 3,020 5,355 8,247 12,971
Other segment items (49,318) (354) (49,773) (585) (24,086) (2,721)
Segment net income (loss) 43,665 (9,703) 35,387 (19,142) (8,978) (57,775)
Reporting Segment | Candid [Member]            
Segment Reporting Information [Line Items]            
Termination fee     50,000      
RLYB212 | Reporting Segment            
Segment Reporting Information [Line Items]            
Research and development (48) 1,377 8 3,815 6,291 21,287
RLYB116 | Reporting Segment            
Segment Reporting Information [Line Items]            
Research and development 525 1,274 921 1,893 3,786 4,841
Other program candidates | Reporting Segment            
Segment Reporting Information [Line Items]            
Research and development 5 95 7 (68) (29) 1,901
Personnel expenses (including share-based compensation) | Reporting Segment            
Segment Reporting Information [Line Items]            
Research and development 180 3,161 2,460 5,750 8,798 12,488
Other expenses | Reporting Segment            
Segment Reporting Information [Line Items]            
Research and development $ 96 $ 167 $ 233 $ 409 $ 751 $ 990