v3.26.3
Summary of Significant Accounting Policies - Additional information (Detail)
¥ in Millions
3 Months Ended 9 Months Ended
Mar. 19, 2026
USD ($)
Mar. 19, 2026
JPY (¥)
Sep. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
Segment
Sep. 30, 2026
JPY (¥)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Accounting Policies [Line Items]              
Deposits in federal deposit insurance corporation     $ 3,000,000 $ 3,000,000     $ 800,000
FDIC Indemnification Asset     29,700,000 29,700,000     15,400,000
Deposits in deposit insurance corporation of japan     64,000 64,000 ¥ 10.0    
Deferred Transaction Costs     0 $ 0   $ 700,000 0
Number of operating segments | Segment       1      
Deposit Insurance Corporation of Japan [Member]              
Accounting Policies [Line Items]              
Cash     100,000 $ 100,000     100,000
Deposit Insurance Corporation of Japan [Member] | Over The Limit [Member]              
Accounting Policies [Line Items]              
Cash     30,000.00 30,000.00     $ 40,000.00
Two Thousand Twenty Six Agreement [Member]              
Accounting Policies [Line Items]              
Revenue from Contract with Customer, Including Assessed Tax     $ 28,000 $ 57,000      
Software license fee $ 10,000 ¥ 1.5          
Amount fixed consideration of software agreement $ 114,000 ¥ 18.0