v3.25.2
Unrestricted Net Assets - Condensed Financial Information on Results of Operations (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Condensed Financial Information on Results of Operations [Line Items]    
Revenue $ 3,437,727 $ 4,595,531
Cost or revenues 3,047,069 3,051,541
Operating expenses 2,965,315 1,216,009
Income taxes 0 0
Net (loss) income – Consolidated (2,630,729) 60,035
Northann Corp [Member]    
Condensed Financial Information on Results of Operations [Line Items]    
Revenue 0 0
Cost or revenues 0 0
Operating expenses 708,858 372,865
Income taxes 0 0
Income (loss) – Parent only (708,858) (372,865)
Income (loss) – Subsidiaries with unrestricted net assets (1,162,876) 577,523
(Loss) – Subsidiaries with restricted net assets (686,994) (144,623)
Net (loss) income – Consolidated $ (2,630,728) $ 60,035