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Business Combinations - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 13, 2018
Feb. 17, 2017
Feb. 28, 2017
Jul. 31, 2018
Oct. 31, 2018
Oct. 31, 2017
[1]
Jan. 31, 2018
[2]
Business Acquisition [Line Items]              
Payments for business acquisition, net of cash acquired         $ 15,616 $ 0  
Goodwill         18,074   $ 6,282
Stormpath Inc.              
Business Acquisition [Line Items]              
Total purchase price   $ 3,700          
Shares included in total consideration (in shares)   200,000          
Stormpath Inc. | Restricted common stock              
Business Acquisition [Line Items]              
Incremental shares issued (in shares)   800,000 800,000        
Incremental shares issued   $ 8,600 $ 8,600        
Stormpath Inc. | Stormpath Investors              
Business Acquisition [Line Items]              
Total purchase price   2,200          
Stormpath Inc. | Stormpath Workforce              
Business Acquisition [Line Items]              
Total purchase price   1,500          
Incremental shares issued   $ 9,100          
ScaleFT, Inc.              
Business Acquisition [Line Items]              
Payments for business acquisition, net of cash acquired $ 15,600            
Cash acquired from acquisition 600            
Purchased developed technology 4,600            
Goodwill $ 11,800       11,800    
Acquisition related costs       $ 1,100      
ScaleFT, Inc. | Purchased developed technology              
Business Acquisition [Line Items]              
Purchased developed technology         $ 4,600    
Useful life of acquired intangible assets 3 years            
[1] See Note 2 for a summary of adjustments.
[2] See Note 2 for a summary of adjustments.