v3.26.3
Description of Business - Additional Information (Detail)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Jul. 20, 2026
USD ($)
$ / shares
Sep. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
Segment
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Number of operating segment | Segment     1
Number of reportable segment | Segment     1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]     srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description     The CODM assesses performance and decides how to allocate resources based on consolidated net loss that is reported on the consolidated statements of operations and comprehensive loss. The CODM uses consolidated net loss to evaluate income generated from segment assets. Net loss is used to monitor budget versus actual results.
Personalis Inc [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Termination fee | $ $ 76.8    
Business combination aggregate consideration transferred | $   $ 3.7 $ 3.7
Merger Agreement [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Price per common share | $ / shares $ 16.25    
Merger Agreement [Member] | Maximum [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percentage of stock transaction 50.00%