v3.24.0.1
Summary of Significant Accounting Policies - Schedule of Consolidated Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Jan. 26, 2022
Jan. 25, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Accrued expenses and other current liabilities $ 59,314 $ 85,780    
Total current liabilities 86,417 211,075    
Deferred tax liability 8,307 29,396    
Total liabilities 436,155 689,785    
Additional paid-in capital 843,112 831,566    
Accumulated deficit (707,662) (439,296)    
Accumulated other comprehensive loss (181) (260)    
Total stockholders' equity attributable to System1, Inc. 135,278 392,021    
Non-controlling interest 34,037 78,650    
Total stockholders' equity 169,315 470,671 $ 813,266 $ 466,211
Total liabilities and stockholders' equity $ 605,470 1,160,456    
As Previously Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Accrued expenses and other current liabilities   95,447    
Total current liabilities   210,285    
Deferred tax liability   43,355    
Total liabilities   687,668    
Additional paid-in capital   829,687    
Accumulated deficit   (445,301)    
Accumulated other comprehensive loss   (417)    
Total stockholders' equity attributable to System1, Inc.   383,980    
Non-controlling interest   88,808    
Total stockholders' equity   472,788 $ 813,266  
Total liabilities and stockholders' equity   1,160,456    
Revision Adjustments        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Accrued expenses and other current liabilities   790    
Total current liabilities   790    
Deferred tax liability   1,327    
Total liabilities   2,117    
Additional paid-in capital   1,879    
Accumulated deficit   6,005    
Accumulated other comprehensive loss   157    
Total stockholders' equity attributable to System1, Inc.   8,041    
Non-controlling interest   (10,158)    
Total stockholders' equity   (2,117)    
Total liabilities and stockholders' equity   0    
As Revised        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Accrued expenses and other current liabilities   96,237    
Total current liabilities   211,075    
Deferred tax liability   44,682    
Total liabilities   689,785    
Additional paid-in capital   831,566    
Accumulated deficit   (439,296)    
Accumulated other comprehensive loss   (260)    
Total stockholders' equity attributable to System1, Inc.   392,021    
Non-controlling interest   78,650    
Total stockholders' equity   470,671    
Total liabilities and stockholders' equity   1,160,456    
Impact of Reclassification of Discontinued Operations        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Accrued expenses and other current liabilities   (10,457)    
Total current liabilities   0    
Deferred tax liability   (15,286)    
Total liabilities   0    
Additional paid-in capital   0    
Accumulated deficit      
Accumulated other comprehensive loss   0    
Total stockholders' equity attributable to System1, Inc.   0    
Non-controlling interest   0    
Total stockholders' equity   0    
Total liabilities and stockholders' equity   $ 0