Subsequent Events- Additional Information (Detail) $ / shares in Units, ¥ in Millions |
Apr. 17, 2026
$ / shares
shares
|
Apr. 01, 2026
JPY (¥)
|
Apr. 01, 2026
USD ($)
|
Mar. 19, 2026
JPY (¥)
|
Mar. 19, 2026
USD ($)
|
Jun. 30, 2026
shares
|
Dec. 31, 2025
shares
|
Dec. 31, 2024
shares
|
|---|---|---|---|---|---|---|---|---|
| Subsequent Event [Line Items] | ||||||||
| Software license fee | ¥ 15.0 | $ 9,500 | ¥ 1.5 | $ 10 | ||||
| Amount fixed consideration of software agreement | ¥ 18.0 | $ 114,000 | ¥ 18.0 | $ 114 | ||||
| Common stock, shares, issued | 5,544,050 | 5,752,800 | 5,745,000 | |||||
| Share price | $ / shares | $ 0.0001 | |||||||
| Stock issued during period, shares, new issues | 21.88 | |||||||
| Founder Share [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Common stock, shares, issued | 218,750 |