v3.26.1
Common Stock - Summary of Reserved Shares of Common Stock for Issuance (Details) - shares
shares in Thousands
Jun. 30, 2026
Dec. 31, 2025
Common Stock    
Shares of authorized but unissued common stock 66,790 69,629
Options issued and outstanding    
Common Stock    
Shares of authorized but unissued common stock 331 346
Unvested restricted stock units    
Common Stock    
Shares of authorized but unissued common stock 1,430 1,336
Vested and unreleased RSUs    
Common Stock    
Shares of authorized but unissued common stock 445 110
Shares available for future grant from 2024 Plan    
Common Stock    
Shares of authorized but unissued common stock 1,566 2,254
Shares available for future grant from 2024 ESPP    
Common Stock    
Shares of authorized but unissued common stock 600 600
Common stock warrants    
Common Stock    
Shares of authorized but unissued common stock 41,918 43,533
Legacy GCT Earnout Shares    
Common Stock    
Shares of authorized but unissued common stock 20,000 20,000
Convertible promissory notes    
Common Stock    
Shares of authorized but unissued common stock 500 1,450