v3.25.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2025
Aug. 19, 2025
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Entity File Number 001-41816  
Entity Registrant Name NORTHANN CORP.  
Entity Central Index Key 0001923780  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 88-1513509  
Entity Address, Address Line One 2251 Catawba River Rd  
Entity Address, City or Town Fort Lawn  
Entity Address, State or Province SC  
Entity Address, Postal Zip Code 29714  
City Area Code 916  
Local Phone Number 573 3803  
Title of 12(b) Security Common Stock, $0.001 par value  
Trading Symbol NCL  
Security Exchange Name NYSEAMER  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   95,464,000
Series A Preferred Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   5,000,000