v3.26.3
Related Parties Disclosure - Schedule of Condensed Consolidated Financial Statements (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 01, 2026
Dec. 31, 2025
SEALSQ France SAS [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 1,473,162    
% ownership 100.00%   100.00%
Nature of business Chip manufacturing, sales & distribution    
Sealsq Japan KK [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 1,000,000    
% ownership 100.00%   100.00%
Nature of business Sales & distribution    
SEALSQ France Taiwan Branch [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 100,000    
% ownership 100.00%   100.00%
Nature of business Sales & distribution    
SEALSQ USA Ltd [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital    
% ownership 100.00%   100.00%
Nature of business Sales & distribution    
IC’Alps SAS [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 1,100,000    
% ownership 100.00%   100.00%
Nature of business Custom ASIC design services    
Miraex SA [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 904,536    
% ownership 100.00% 100.00%
Nature of business Photonic integrated circuit (PIC) platform    
Wecan Group SA [Member]      
Schedule of Condensed Consolidated Financial Statements [Line Items]      
Share Capital $ 304,911    
% ownership 55.52%   31.87%
Nature of business Blockchain solutions for data quality and compliance in the financial sector