Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 01, 2021
USD ($)
$ / shares
shares
Feb. 18, 2021
USD ($)
$ / shares
shares
Nov. 25, 2019
USD ($)
Sep. 30, 2021
USD ($)
Customer
Sep. 30, 2020
USD ($)
Customer
Sep. 30, 2021
USD ($)
Customer
Sep. 30, 2020
USD ($)
Customer
Dec. 31, 2020
USD ($)
Customer
Schedule Of Significant Accounting Policies [Line Items]                
Total current assets       $ 199,419,000   $ 199,419,000   $ 85,045,000 [1]
Total current liabilities       115,995,000   115,995,000   $ 88,768,000 [1]
Net assets current       83,400,000   83,400,000    
Business combination transaction related costs     $ 13,100,000     405,000    
Business combination, deferred consideration     15,000,000.0          
Obligations net under shares purchase forward agreements entered by former entity     13,200,000          
Business combination, notes payable acquired     $ 3,600,000          
Revenue       $ 84,025,000 $ 38,268,000 $ 177,731,000 $ 103,100,000  
Customers | Customer Concentration Risk | Revenue                
Schedule Of Significant Accounting Policies [Line Items]                
Concentration risk percentage       10.00% 10.00% 10.00% 10.00%  
Number of customers | Customer       1 1 0 1  
Customers | Customer Concentration Risk | Trade Receivables                
Schedule Of Significant Accounting Policies [Line Items]                
Concentration risk percentage           10.00%   10.00%
Number of customers | Customer           1   1
Customer 1 | Customer Concentration Risk | Revenue                
Schedule Of Significant Accounting Policies [Line Items]                
Revenue       $ 9,200,000 $ 4,900,000   $ 10,500,000  
Customer 1 | Customer Concentration Risk | Trade Receivables                
Schedule Of Significant Accounting Policies [Line Items]                
Revenue           $ 8,500,000   $ 4,500,000
mGage                
Schedule Of Significant Accounting Policies [Line Items]                
Business combination, deferred consideration   $ 32,284,000            
Acquisition date   Feb. 18, 2021       Feb. 18, 2021    
Business combination, purchase price $ 18,800,000              
Closing of business combination share consideration | shares 1,600,000 1,600,000            
Business combination, share price per share | $ / shares $ 11.77              
mGage | PIPE Subscription Agreements                
Schedule Of Significant Accounting Policies [Line Items]                
Business combination, purchase price   $ 200,000,000            
Closing of business combination share consideration | shares   8,400,000            
Business combination, share price per share | $ / shares   $ 12.50            
mGage | PIPE Subscription Agreements | Private Placements                
Schedule Of Significant Accounting Policies [Line Items]                
Business combination, purchase price   $ 105,000,000            
[1]

The condensed consolidated balance sheet as of December 31, 2020 has been derived from the audited consolidated financial statements as of that date.