General form of registration statement for all companies including face-amount certificate companies

Acquisitions - Additional Information (Detail)

v3.21.2
Acquisitions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Apr. 06, 2021
Jan. 11, 2021
Jun. 30, 2021
Dec. 31, 2020
Business Acquisition [Line Items]        
Share based compensation arrangement share based payment award vesting period     6 years  
Goodwill     $ 4,880  
Research and Development Expense [Member]        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration, Asset       $ 5,000
Uber Elevate [Member]        
Business Acquisition [Line Items]        
Business Combination, Consideration Transferred   $ 77,600    
Non cash compensation expense   $ 7,500    
Convertible preferred note interest rate   5.00%    
Business combination, estimated fair value of acquiree   $ 20,000    
Business combination fair return on investments   35.00%    
Decrease in preliminary value percentage of intangible assets   23.00%    
Preliminary value percentage of intangible assets   37.00%    
Discount rate   25.00%    
Goodwill     4,900  
Uber Elevate [Member] | Contractual Agreement Assets [Member]        
Business Acquisition [Line Items]        
Business combinagtion, fair value assets acquired   $ 49,500    
Estimated fair value of contractual agreement asset   $ 49,500    
Uber Elevate [Member] | Contractual Agreement Assets [Member] | Acquired Current Liabilities [Member]        
Business Acquisition [Line Items]        
Payment to acquire research and development of assets in process $ 100      
Uber Elevate [Member] | Contractual Agreement Assets [Member] | Acquired Current Assets [Member]        
Business Acquisition [Line Items]        
Payment to acquire research and development of assets in process $ 100      
Uber Elevate [Member] | Other Non Cash Expense [Member]        
Business Acquisition [Line Items]        
Non cash compensation expense     3,700  
Uber Elevate [Member] | Research and Development Expense [Member]        
Business Acquisition [Line Items]        
Non cash compensation expense     3,300  
Uber Elevate [Member] | Selling, General and Administrative Expenses [Member]        
Business Acquisition [Line Items]        
Non cash compensation expense     $ 400  
Uber Elevate [Member] | Series C redeemable convertible preferred stock [Member]        
Business Acquisition [Line Items]        
Stock Issued During Period, Shares, Acquisitions   2,581,285    
Business combination, share price   $ 30.07    
Debt Conversion, Converted Instrument, Amount   $ 75,000    
Convertible preferred note interest rate   5.00%    
Convertible perferred note maturity term   2 years    
Convertible preferred note, face amount   $ 74,500    
Convertible preferred note, premium   $ 500    
Share based compensation arrangement share based payment award vesting period       6 years
Uber Elevate [Member] | Series C redeemable convertible preferred stock [Member] | Contractual Agreement Assets [Member]        
Business Acquisition [Line Items]        
Stock Issued During Period, Shares, Acquisitions 774,385      
Cash payments $ 5,000      
Compensation for future employment 23,900      
Fair Value Of Aggregate With Business Acquisitions $ 23,900