v3.26.1
COMMITMENTS AND CONTINGENCIES (Details)
1 Months Ended
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Sep. 15, 2022
USD ($)
May 09, 2022
USD ($)
Mar. 31, 2026
USD ($)
May 07, 2026
USD ($)
Feb. 26, 2025
lawsuit
Dec. 04, 2024
lawsuit
Sep. 29, 2022
USD ($)
Loss Contingencies [Line Items]                  
Litigation settlements $ 9,750,000 $ 9,750,000              
Pending Litigation                  
Loss Contingencies [Line Items]                  
Number of pending lawsuits | lawsuit             2    
Appian Corp. v. Pegasystems Inc. & Youyong Zou                  
Loss Contingencies [Line Items]                  
Outstanding letters of credit                 $ 25,000,000
Letters of credit, canceled           $ 25,000,000      
Appian Corp. v. Pegasystems Inc. & Youyong Zou | Pending Litigation                  
Loss Contingencies [Line Items]                  
Litigation settlement loss   9,750,000              
Appian Corp. v. Pegasystems Inc. & Youyong Zou | Pending Litigation | Special Dividend to Shareholders                  
Loss Contingencies [Line Items]                  
Litigation settlement loss   $ 7,000,000              
Appian Corp. v. Pegasystems Inc. & Youyong Zou | Judicial Ruling                  
Loss Contingencies [Line Items]                  
Loss contingency, damages awarded, value     $ 2,060,479,287            
Appian Corp. v. Pegasystems Inc. & Youyong Zou | Settled Litigation | Special Dividend to Shareholders                  
Loss Contingencies [Line Items]                  
Litigation settlement loss 7,000,000                
Litigation settlement, payment of plaintiff attorney fees $ 2,750,000                
Class Action, Case 12999 and Case 11220 | Pending Litigation                  
Loss Contingencies [Line Items]                  
Percentage of settlement class that opted out of court approved settlement               3.00%  
Number of pending lawsuits | lawsuit               2  
Case 2584CV00541-BLS1 and Case 2584CV00539-BLS1 | Pending Litigation                  
Loss Contingencies [Line Items]                  
Number of pending lawsuits | lawsuit             2    
Pegasystems v. Appian Defamation Litigation                  
Loss Contingencies [Line Items]                  
Gain contingency, litigation damages claimed         $ 41,900,000        
Loss contingency, litigation damages sought by other party         2,330,000,000        
Pegasystems v. Appian Defamation Litigation | Lost Profits of Third Party                  
Loss Contingencies [Line Items]                  
Loss contingency, litigation damages sought by other party         31,800,000        
Pegasystems v. Appian Defamation Litigation | Disgorge of Company Profits                  
Loss Contingencies [Line Items]                  
Loss contingency, litigation damages sought by other party         $ 109,500,000        
Trade Secret Misappropriation | Appian Corp. v. Pegasystems Inc. & Youyong Zou                  
Loss Contingencies [Line Items]                  
Legal fees, post-judgement interest rate, percentage     6.00%            
Trade Secret Misappropriation | Appian Corp. v. Pegasystems Inc. & Youyong Zou | Judicial Ruling                  
Loss Contingencies [Line Items]                  
Loss contingency, damages awarded, value       $ 2,036,860,045          
Violation of the Virginia Computer Crimes Act | Appian Corp. v. Pegasystems Inc. & Youyong Zou | Judicial Ruling                  
Loss Contingencies [Line Items]                  
Loss contingency, damages awarded, value       $ 1.00