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Acquisitions -Summary of Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Oct. 08, 2019
Apr. 30, 2019
Jul. 31, 2018
Apr. 30, 2018
Oct. 31, 2017
May 31, 2017
Business Acquisition [Line Items]              
Goodwill $ 197,877   $ 19,846   $ 19,182    
Endgame, Inc.              
Business Acquisition [Line Items]              
Cash and cash equivalents   $ 2,220          
Restricted cash   40          
Accounts receivable   2,661          
Prepaid and other current assets   549          
Operating lease right-of-use assets   4,363          
Property and equipment   503          
Intangible assets   53,800          
Other assets   58          
Goodwill   178,764          
Accounts payable   (1,112)          
Accrued expenses and other current liabilities   (3,035)          
Accrued compensation and benefits   (5,042)          
Operating lease liabilities, current   (981)          
Deferred revenue, current   (3,532)          
Deferred revenue, non-current   (2,661)          
Operating lease liabilities, non-current   (3,551)          
Other liabilities, non-current   (8,771)          
Total purchase consideration   $ 214,273          
Lambda Lab              
Business Acquisition [Line Items]              
Goodwill       $ 1,038      
Net asset/liabilities acquired       (395)      
Total purchase consideration       1,997      
Lambda Lab | Developed technology              
Business Acquisition [Line Items]              
Intangible assets       1,339      
Lambda Lab | Trade names              
Business Acquisition [Line Items]              
Intangible assets       $ 15      
Swiftype Inc              
Business Acquisition [Line Items]              
Cash and cash equivalents           $ 1,100  
Intangible assets           5,600  
Goodwill           1,885  
Net asset/liabilities acquired           2,584  
Total purchase consideration           10,116  
Swiftype Inc | Developed technology              
Business Acquisition [Line Items]              
Intangible assets           5,392  
Swiftype Inc | Trade names              
Business Acquisition [Line Items]              
Intangible assets           97  
Swiftype Inc | Customer relationships              
Business Acquisition [Line Items]              
Intangible assets           $ 158  
Opbeat              
Business Acquisition [Line Items]              
Cash and cash equivalents             $ 100
Goodwill             4,925
Net asset/liabilities acquired             371
Total purchase consideration             7,142
Opbeat | Developed technology              
Business Acquisition [Line Items]              
Intangible assets             $ 1,846