v3.20.1
Summary of Significant Accounting Policies (Details)
1 Months Ended 12 Months Ended
Jun. 14, 2019
USD ($)
shares
Feb. 01, 2019
USD ($)
Jul. 31, 2019
USD ($)
Sep. 30, 2018
unit_Standard_installment
unit_Standard_tranche
Jan. 31, 2020
USD ($)
segment
unit_Standard_installment
reportingUnit
Jan. 31, 2019
USD ($)
Jan. 31, 2018
USD ($)
Feb. 01, 2020
USD ($)
Concentration Risk [Line Items]                
Capital contributions         $ 1,000,000 $ 0 $ 0  
Allowance for doubtful accounts         1,100,000 1,000,000.0    
Deferred offering costs   $ 3,000,000.0       2,900,000    
Payments Of Deferred Offering Costs         5,872,000 0 0  
Capitalized computer software impairments         0 0 0  
Capitalized computer software additions         8,100,000 6,800,000 6,500,000  
Capitalized computer software amortization         6,200,000 5,200,000 3,200,000  
Capitalized computer software net         $ 13,400,000 11,500,000    
Commission amortization period         4 years      
Professional service contract amortization period         6 months      
Capitalization of contract acquisition costs         $ 86,594,000 45,073,000    
Contract acquisition cost amortization expense         35,500,000 28,600,000 12,500,000  
Impairment losses         0 0 0  
Advertising expense         $ 8,000,000.0 3,100,000 1,600,000  
Vesting period         4 years      
Number of reporting units | reportingUnit         1      
Goodwill impairment loss         $ 0 0 0  
Tax expense         $ 1,997,000 1,367,000 929,000  
Number of reportable segments | segment         1      
Number of operating segments | segment         1      
ASC 2014-09                
Concentration Risk [Line Items]                
Cumulative effect adjustment to opening accumulated deficit, net of tax   23,400,000            
Reduction in the amortization of deferred contract acquisition costs   23,700,000            
ASC 2014-09 | Impact of Adoption                
Concentration Risk [Line Items]                
Reduction in revenue   $ 300,000            
RSUs                
Concentration Risk [Line Items]                
Vesting period         4 years      
Number of vesting schedules       3 3      
Performance Based RSUs                
Concentration Risk [Line Items]                
Deferred compensation expense $ 17,300,000              
PSUs                
Concentration Risk [Line Items]                
Vesting period         4 years      
Restatement Adjustment                
Concentration Risk [Line Items]                
Tax expense         $ 0 $ 0 $ 0  
Tranche One | RSUs                
Concentration Risk [Line Items]                
Vesting percentage       25.00%        
Number of quarterly installments | unit_Standard_installment       12 12      
Tranche Two | RSUs                
Concentration Risk [Line Items]                
Number of quarterly installments | unit_Standard_installment       16 16      
Tranche Three | RSUs                
Concentration Risk [Line Items]                
Number of quarterly installments | unit_Standard_installment       8 8      
Capitalized internal-use software                
Concentration Risk [Line Items]                
Useful life         3 years      
Crowdstrike Falcon Fund Llc                
Concentration Risk [Line Items]                
Sharing percentage     50.00%          
Duration of fund     10 years          
Additional extendable duration of fund     3 years          
Capital contributions         $ 500,000      
Crowdstrike Falcon Fund Llc | Accel                
Concentration Risk [Line Items]                
Sharing percentage     50.00%          
Capital contributions         500,000      
Class B Common Stock                
Concentration Risk [Line Items]                
Shares issued upon conversion of warrants (in shares) | shares 336,386              
Shares issued (in shares) | shares 322,278              
Class B Common Stock | IPO                
Concentration Risk [Line Items]                
Warrants Issued (in shares) | shares 336,386              
Warrants conversion ratio 1              
Series B                
Concentration Risk [Line Items]                
Capital contribution         $ 1,000,000.0      
Minimum                
Concentration Risk [Line Items]                
Useful life         3 years      
Subscription fees payable term         30 days      
Subscription term         1 year      
Right of use asset               $ 35,500,000
Minimum | Accel                
Concentration Risk [Line Items]                
Percentage Of capital stock held     5.00%          
Maximum                
Concentration Risk [Line Items]                
Useful life         5 years      
Subscription fees payable term         60 days      
Subscription term         3 years      
Right of use asset               $ 39,500,000
Maximum | Crowdstrike Falcon Fund Llc                
Concentration Risk [Line Items]                
Amount agreed to commit     $ 10,000,000.0          
Maximum | Crowdstrike Falcon Fund Llc | Accel                
Concentration Risk [Line Items]                
Amount agreed to commit     $ 10,000,000.0