v3.26.1
Collaboration Agreements, License Agreement and Revenues - Roll-forward of Related Contract Liabilities (Detail) - Drug Product Revenue, Net [Member] - Astellas Agreement [Member] - Europe [Member]
$ in Thousands
6 Months Ended
Jun. 30, 2026
USD ($)
Contract with Customer Liability [Line Items]  
Balance at December 31, 2025 $ (5,569)
Additions (6,164)
Recognized as Revenue 2,862
Reclassified to Accrued Liability / Accounts Payable 833
Balance at March 31, 2026 $ (8,038)