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Related-Party Transactions (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
board_member
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Adobe Systems | Chief Executive Officer      
Related Party Transaction [Line Items]      
Purchases from related party $ 1,700,000 $ 2,100,000 $ 3,300,000
Revenue from related parties 100,000 200,000 100,000
Due to related parties 100,000 200,000  
Receivable from related parties 0 0  
Synack Inc. | Board of Directors Member      
Related Party Transaction [Line Items]      
Purchases from related party $ 100,000 400,000 100,000
Number of board members appointed to chief executive officer of related party | board_member 1    
Zuora, Inc. | Board of Directors Member      
Related Party Transaction [Line Items]      
Purchases from related party $ 1,300,000    
Number of board members appointed to chief executive officer of related party | board_member 1    
Payment Processing Fees | PayPal Holdings, Inc. | Immediate Family Member of Management or Principal Owner      
Related Party Transaction [Line Items]      
Expenses from transactions with related party $ 2,100,000 $ 1,600,000 $ 1,300,000
Number of board members appointed to Board of Directors of related party | board_member 1