v3.25.2
Unrestricted Net Assets - Condensed Financial Information on Cash Flows (Detail) - USD ($)
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Condensed Financial Information on Cash Flows [Line Items]    
Cash (used in) provided by operating activities $ (3,829,935) $ 175,674
Cash (used in) provided by investing activities (785,240) (326,829)
Cash (used in) provided by financing activities 4,450,938 (889,558)
Effect of exchange rates on cash 981,112 159,585
Net cash flows 816,875 (881,128)
Cash and cash equivalents, beginning of period 245,164 1,105,214
Cash and cash equivalents, end of period 1,062,038 224,086
Northann Corp [Member]    
Condensed Financial Information on Cash Flows [Line Items]    
Cash (used in) provided by operating activities (1,050,859) (251)
Cash (used in) provided by investing activities
Cash (used in) provided by financing activities 1,051,359 0
Effect of exchange rates on cash 0 0
Net cash flows 500 (251)
Cash and cash equivalents, beginning of period 0 370
Cash and cash equivalents, end of period $ 500 $ 119