v3.26.3
Stockholders' equity - Schedule of Potentially be Issued Under Each Outstanding (Parenthetical) (Detail) - $ / shares
Sep. 29, 2026
Jun. 30, 2026
Apr. 27, 2026
Class B1 B2 C1 And C2 Warrants [Member]      
Class of Stock [Line Items]      
Class of warrants or rights exercise price $ 2.4444 $ 3.0032 $ 2.4444