v3.26.1
Income Tax - Additional Information (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
CNY (¥)
Dec. 31, 2022
USD ($)
Income Tax Disclosure [Line Items]          
Preferential tax rate (1.60%) 0.40% 3.10%    
Corporate tax rate 0.00% 0.00% 0.00%    
Current income taxes $ 0 $ 0 $ 0    
Deferred income taxes 0 0 0    
Net operating loss carryforwards 24,980,220        
Taxable income (32,502,645) (11,940,536) (8,083,640)    
Unrecognized uncertain tax positions 0        
Interest and penalties related to potential underpaid income tax expenses 0        
Valuation allowance 6,918,609 4,160,082 2,529,266   $ 2,295,587
Subsidiaries          
Income Tax Disclosure [Line Items]          
Taxable income 0 $ 0 $ 0    
PRC Subsidiaries [Member]          
Income Tax Disclosure [Line Items]          
Net operating loss carryforwards $ 25,000,000        
Earliest Tax Year          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year 2027        
Operating loss carryforwards second expiration year 2033        
Latest Tax Year          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year 2031        
Operating loss carryforwards second expiration year 2035        
Germany          
Income Tax Disclosure [Line Items]          
Statutory income tax rate 32.275% 32.275% 32.275%    
Corporate tax rate 15.00% 15.00% 15.00%    
Income tax solidarity surcharge 5.50% 5.50% 5.50%    
Income taxes trade tax rate 16.45% 16.45% 16.45%    
Net operating loss carryforwards $ 1,000,000        
United States          
Income Tax Disclosure [Line Items]          
Statutory income tax rate 21.00%        
Net operating loss carryforwards $ 4,900,000        
PRC Tax Administration and Collection Law          
Income Tax Disclosure [Line Items]          
Statutory income tax rate 25.00%        
Preferential tax rate 15.00%        
Operating loss carryforwards, limitations on use According to the PRC Tax Administration and Collection Law, the statute of limitation is three years if the underpayment of taxes is due to computational errors made by the taxpayer or the withholding agent. The statute of limitation is extended to five years under special circumstances where the underpayment of taxes is more than RMB100,000. In the case of transfer pricing issues, the statute of limitation is 10 years. There is no statute of limitation in the case of tax evasion.        
Income tax examination statute of limitation for underpayment of taxes period 3 years        
Income tax examination statute of limitation for underpayment of taxes above threshold limit period 5 years        
Underpayment of taxes | ¥       ¥ 100,000  
Income tax examination statute of limitation for transfer pricing 10 years        
Internal Revenue Service ("IRS")          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards, limitations on use The subsidiary in United States is subject to US federal income tax examinations by the Internal Revenue Service (“IRS”) for tax years ending December 31, 2023, 2024, and 2025. Under the Internal Revenue Code, the statute of limitations for the IRS to assess additional taxes generally expires three years from the later of the tax return filing date or its due date (including extensions). However, this period may be extended to six years in cases of substantial understatement of income (≥25% of gross income) or indefinitely in instances of fraud or failure to file a return.        
Income tax examination statute of limitation to assess additional taxes period 3 years        
Income tax examination statute of limitation to assess additional taxes extended period 6 years        
Description of period extention statute of limitations However, this period may be extended to six years in cases of substantial understatement of income (≥25% of gross income) or indefinitely in instances of fraud or failure to file a return.