v3.25.2
SEGMENTS (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
Jun. 30, 2024
USD ($)
Segment Reporting [Abstract]        
Number of operating segments | segment     1  
Number of reportable segments | segment     1  
Segment Reporting Information [Line Items]        
Total revenue $ 212 $ 299 $ 424 $ 299
Total research and development 6,074 12,946 11,799 25,882
Net loss (9,703) (16,236) (19,142) (35,265)
Reporting Segment        
Segment Reporting Information [Line Items]        
Total revenue 212 299 424 299
Total research and development 6,074 12,946 11,799 25,882
General and administrative, excluding personnel expenses 1,472 1,821 2,997 3,732
General and administrative, personnel expenses (including share-based compensation) 2,723 2,567 5,355 7,507
Other segment items (354) (799) (585) (1,557)
Net loss (9,703) (16,236) (19,142) (35,265)
Reporting Segment | RLYB212        
Segment Reporting Information [Line Items]        
Total research and development 1,377 6,834 3,815 12,479
Reporting Segment | RLYB116        
Segment Reporting Information [Line Items]        
Total research and development 1,274 3,140 1,893 4,437
Reporting Segment | Other program candidates        
Segment Reporting Information [Line Items]        
Total research and development 95 578 (68) 1,182
Reporting Segment | Personnel expenses (including share-based compensation)        
Segment Reporting Information [Line Items]        
Total research and development 3,161 2,154 5,750 7,325
Reporting Segment | Other expenses        
Segment Reporting Information [Line Items]        
Total research and development $ 167 $ 240 $ 409 $ 459