v3.26.1
Segment Information - Summary of Segment Performance and Make Decisions About Resource Allocation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]            
Operating expenses $ 26,890   $ 22,810   $ 51,320 $ 44,982
Other income, net 1,885   1,556   2,799 3,417
Net loss (25,005) $ (23,516) (21,254) $ (20,311) (48,521) (41,565)
AB-101 (AlloNK) [Member]            
Segment Reporting Information [Line Items]            
Operating expenses 11,861   8,686   21,793 16,342
Other programs [Member]            
Segment Reporting Information [Line Items]            
Operating expenses 18   0   26 0
Personnel-related [Member]            
Segment Reporting Information [Line Items]            
Operating expenses 10,878   9,640   21,225 19,205
Other [Member]            
Segment Reporting Information [Line Items]            
Operating expenses $ 4,133   $ 4,484   $ 8,276 $ 9,435