v3.26.3
Stock-Based Compensation (Details)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
shares
Jun. 30, 2024
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
$ / shares
Dec. 31, 2011
SFr / shares
shares
Dec. 31, 2007
SFr / shares
shares
Stock-Based Compensation [Line Items]              
Unrecognized compensation expense related to non-vested stock option-based compensation arrangements. | $            
Total charge for options granted recognized in the consolidated income statement | $ $ 278,057,000            
Ordinary Shares [Member]              
Stock-Based Compensation [Line Items]              
Options granted 1,230,670            
Exercised shares 1,588,536            
Delivery ordinary shares 1,492,005            
Equity Option [Member]              
Stock-Based Compensation [Line Items]              
Total charge for options granted recognized in the consolidated income statement | $ $ 4,247,067,000            
Board Members [Member]              
Stock-Based Compensation [Line Items]              
Non-vested options, Granted 45,000            
Total charge for options granted recognized in the consolidated income statement | $ $ 3,969,010            
Board Members [Member] | Ordinary Shares [Member]              
Stock-Based Compensation [Line Items]              
Options granted 1,179,670            
WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $ $ 610,323,000            
WISeKey SA [Member] | Ordinary Shares [Member]              
Stock-Based Compensation [Line Items]              
Options granted 6,000            
SEALSQ [Member]              
Stock-Based Compensation [Line Items]              
Exercised shares 96,531            
Class B Common Stock [Member]              
Stock-Based Compensation [Line Items]              
Exercise price | $ / shares $ 2.54     $ 2.47 $ 2.4    
Non-vested options, Granted 4,894     22,129      
Exercised shares 94,844     7,741      
Class B Common Stock [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $ $ 323,400,000            
Class A Common Stock [Member]              
Stock-Based Compensation [Line Items]              
Exercise price | $ / shares $ 0.16     $ 0.25 $ 0.25    
Non-vested options, Granted          
Exercised shares 218,180            
Class A Common Stock [Member] | Board Members [Member]              
Stock-Based Compensation [Line Items]              
Non-vested options, Granted 4,894            
Class A Common Stock [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $ $ 286,923,000            
F Shares [Member]              
Stock-Based Compensation [Line Items]              
Options granted            
Related Party [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $       $ 2,914,204      
Related Party [Member] | Class B Common Stock [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $       1,590,825      
Related Party [Member] | Class A Common Stock [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Net gain on reclassification and remeasurement of stock option from equity to liability | $       $ 1,323,379      
Options granted        
Related Party [Member] | The "ESOP 1" [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Number of convertible stock options approved             2,632,500
Exercise price | SFr / shares             SFr 0.01
Related Party [Member] | The "ESOP 2" [Member] | WISeKey SA [Member]              
Stock-Based Compensation [Line Items]              
Number of convertible stock options approved           16,698,300  
Exercise price | SFr / shares           SFr 0.01