XML 54 R40.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Additional Information (Detail)
 6 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
Customer
$ / shares
shares
Dec. 31, 2020
USD ($)
Customer
$ / shares
shares
Dec. 31, 2019
USD ($)
Customer
shares
Dec. 31, 2018
USD ($)
Customer
Summary Of Significant Accounting Policies [Line Items]        
Short-term investments $ 0 $ 0 $ 108,919,000  
Purchases of digital assets, amount $ 1,125,000,000 1,125,000,000 0 $ 0
Additions to capitalized software development costs   0 0 0
Capitalized computer software, amortization   $ 0 0 2,500,000
Payment terms   The Company’s standard payment terms are generally within 180 days of invoicing. If extended payment terms are granted to customers, those terms generally do not exceed one year.    
Description of warranty   The standard software assurance warranty period is generally less than one year.    
Amortization period for capitalized contract costs 3 years 3 years    
Product support period   1 year    
Capitalized cost to obtain customer contracts net $ 6,100,000 $ 6,100,000 4,800,000  
Advertising costs   100,000 900,000 7,100,000
Prepaid advertising costs $ 0 $ 0 $ 0  
Common stock, conversion ratio   one    
Preferred stock, shares outstanding | shares 0 0 0  
Cumulative foreign currency translation amount $ (3,900,000) $ (3,900,000) $ (9,800,000) (9,800,000)
Foreign currency translation adjustments, tax   0 0 0
Transaction gains (losses) arising from transactions denominated in foreign currencies   $ (7,600,000) $ (1,000,000.0) $ 4,700,000
Customer Concentration Risk | Sales Revenue, Goods, Net        
Summary Of Significant Accounting Policies [Line Items]        
Number of individual customer accounted for 10% or more of net accounts receivable | Customer 0 0 0  
Number of individual customer accounted for 10% or more of total revenues | Customer   0 0 0
Class A        
Summary Of Significant Accounting Policies [Line Items]        
Common stock, voting rights, per share   one    
Class A | Convertible Debt        
Summary Of Significant Accounting Policies [Line Items]        
Common stock, convertible, conversion price | $ / shares $ 397.99 $ 397.99    
Class B Convertible        
Summary Of Significant Accounting Policies [Line Items]        
Common stock, voting rights, per share   ten    
Sales and Marketing        
Summary Of Significant Accounting Policies [Line Items]        
Amortization expenses related to capitalized cost   $ 3,100,000 $ 2,900,000 $ 2,300,000
Computer Equipment And Purchased Software        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives of assets, years   3 years    
Office Equipment        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives of assets, years   5 years    
Office Furniture        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives of assets, years   10 years    
Corporate Aircraft        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives of assets, years   19 years    
Estimated salvage value 21.00% 21.00%    
Software Development        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives of assets, years   3 years