v3.25.2
Unrestricted Net Assets - Condensed Financial Information on Financial Position (Detail) - USD ($)
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Assets [Abstract]            
Total current assets $ 8,141,903   $ 5,913,268      
Total Assets 16,502,926   13,875,685      
Liabilities and Stockholders' Deficit            
Total current liabilities 7,987,717   9,673,053      
Total Liabilities 12,123,188   11,276,512      
Stockholders' Equity (Deficit)            
Common stock, $0.001 par value, 400,000,000 shares authorized, 95,464,000 shares issued and outstanding as of March 31, 2025 and 55,464,000 shares issued and outstanding as of December 31, 2024 95,464   55,464      
Subscription receivable (4,967,850)   (1,375,000)      
Additional Paid-in Capital 23,580,165   15,487,165      
Accrued compensation expense (2,110,500)   (2,927,250)      
Retained earnings (accumulated deficit) (14,586,105)   (9,693,818)      
Accumulated other comprehensive income (loss) 2,363,564   1,047,612      
Total Stockholders' Equity (Deficit) 4,379,738 $ 3,910,949 2,599,173 $ 968,999 $ 712,349 $ 582,612
Total Liabilities and Stockholders' Deficit 16,502,926   13,875,685      
Northann Corp [Member]            
Assets [Abstract]            
Cash 500   0      
Amounts due from subsidiaries 7,487,336   4,422,688      
Total current assets 7,487,836   4,422,688      
All other non-current assets 1,608,932   0      
Interests in a subsidiary 7,406,658   9,452,997      
Total Assets 16,502,926   13,875,685      
Liabilities and Stockholders' Deficit            
All other current liabilities 336,946   358,626      
Total current liabilities 12,123,188   11,240,620      
Non-current liabilities 0   35,892      
Total Liabilities 12,123,188   11,276,512      
Stockholders' Equity (Deficit)            
Preferred stock – Series A, $0.001 par value, 100,000,000 shares authorized, 10,000,000 shares issued and outstanding as of March 31, 2025 and December 31, 2024 5,000   5,000      
Common stock, $0.001 par value, 400,000,000 shares authorized, 95,464,000 shares issued and outstanding as of March 31, 2025 and 55,464,000 shares issued and outstanding as of December 31, 2024 95,464   55,464      
Subscription receivable (4,967,850)   (1,375,000)      
Additional Paid-in Capital 23,580,165   15,487,165      
Accrued compensation expense (2,110,500)   (2,927,250)      
Retained earnings (accumulated deficit) (14,586,105)   (9,693,818)      
Accumulated other comprehensive income (loss) 2,363,564   1,047,612      
Total Stockholders' Equity (Deficit) 4,379,738   2,599,173      
Total Liabilities and Stockholders' Deficit 16,502,926   13,875,685      
Northann Corp [Member] | Related Party [Member]            
Liabilities and Stockholders' Deficit            
Amounts due to subsidiaries $ 11,786,242   $ 10,881,994