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Related-Party Transactions (Details) | 12 Months Ended
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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 |  |

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