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Unrestricted Net Assets - Schedule of Condensed Financial Information on Financial Position (Parenthetical) (Detail) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Condensed Financial Information on Financial Position [Line Items]    
Preferred shares authorized 100,000,000 100,000,000
Common stock, par value $ 0.001 $ 0.001
Common shares authorized 400,000,000 400,000,000
Common shares issued 21,380,000 20,000,000
Common shares outstanding 21,380,000 20,000,000
Northann Corp [Member]    
Condensed Financial Information on Financial Position [Line Items]    
Preferred shares authorized 100,000,000 100,000,000
Northann Corp [Member] | Common Stock [Member]    
Condensed Financial Information on Financial Position [Line Items]    
Common stock, par value $ 0.001 $ 0.001
Common shares authorized 400,000,000 400,000,000
Common shares issued 21,380,000 20,000,000
Common shares outstanding 21,380,000 20,000,000
Series A Preferred Stock [Member]    
Condensed Financial Information on Financial Position [Line Items]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock shares designated 20,000,000 20,000,000
Preferred shares authorized 100,000,000  
Preferred shares issued 5,000,000 5,000,000
Preferred shares outstanding 5,000,000 5,000,000
Series A Preferred Stock [Member] | Northann Corp [Member]    
Condensed Financial Information on Financial Position [Line Items]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock shares designated 20,000,000 20,000,000
Preferred shares issued 5,000,000 5,000,000
Preferred shares outstanding 5,000,000 5,000,000