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

Stock-Based Compensation - Additional Information (Details)

v3.21.2
Stock-Based Compensation - Additional Information (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2021
shares
Jun. 30, 2021
Mar. 31, 2021
shares
Feb. 28, 2021
shares
Jun. 30, 2021
shares
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Employees
$ / shares
shares
Dec. 31, 2019
USD ($)
Employees
shares
Sep. 09, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Expiration period               2 years 10 days 10 years    
Number of options outstanding           2,344   2,344   3,489 3,856 41,000
Total intrinsic value of options exercised | $           $ 2,400,000 $ 300,000 $ 6,800,000 $ 400,000      
Total fair value of shares vested | $               600 600 $ 1,000,000.0 $ 1,600,000  
Compensation cost | $           28,493,000 $ 550,000 29,265,000 $ 1,692,000      
Number of employees for which exercise price adjusted | Employees                   106 124  
Unrecognized compensation cost | $           $ 500   $ 500   $ 1,400,000 $ 4,400,000  
Period for recognition of Unrecognized compensation cost               2 years 4 months 24 days   1 year 10 months 24 days 2 years  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               4 years        
Share-based Payment Arrangement, Tranche Two [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     50.00%                  
Share-based Payment Arrangement, Tranche Three [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     25.00%                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     12 months                  
Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share based compensation by share based arrangement equity instruments other than options granted during the period 9,348                      
Restricted Stock Units (RSUs) [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Total intrinsic value of options exercised | $                   $ 700,000 $ 200,000  
Share based compensation by share based arrangement equity instruments other than options granted during the period               9,348        
Restricted Stock [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Unrecognized compensation cost | $                   $ 200,000    
Period for recognition of Unrecognized compensation cost               1 year 6 months   1 year 8 months 12 days    
Fair value of restricted stock units granted | $                   $ 29,000    
Share based compensation by share based arrangement equity instruments other than options granted during the period                   3,486    
Restricted Stock [Member] | Maximum [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                 4 years      
Restricted Stock [Member] | Minimum [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               3 years        
Continuing Operations [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Compensation cost | $                   $ 2,000,000.0 3,400,000  
Discontinued Operations [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Compensation cost | $                   $ 200,000 $ 600,000  
Plan Mofification Terms For One Hundred and Six Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of options outstanding                   1,600,000    
Stock option exercise price | $ / shares                   $ 0.0121    
Plan Mofification Terms For One Hundred and Twenty Four Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of options outstanding                     1,100,000  
Share-based Payment Arrangement, Plan Modification, Incremental Cost | $                     $ 500,000  
Plan Mofification for Certain Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Unrecognized compensation cost | $                   $ 100,000 $ 200,000  
Period for recognition of Unrecognized compensation cost               1 year 1 month 6 days   1 year 1 year 7 months 6 days  
Plan Mofification for Certain Employees [Member] | Restricted Stock Units (RSUs) [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage       50.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       180 days                
Two Thousand and Eleven Plan and Two Thousand Fourteen Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based compensation arrangement by share-based payment award, number of shares available for grant                   56,000,000    
Number of options outstanding                   3,400,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized               13,100,000        
Two Thousand And Fourteen Equity Incentive Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of options outstanding                       2,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           3,000,000.0   3,000,000.0        
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche One [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     50.00%                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 180 days   180 days   180 days              
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche Two [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 75.00% 25.00%                    
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share based compensation by share based arrangement equity instruments other than options granted during the period 285   229 8,533 164     9.3        
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Employees [Member] | Share-based Payment Arrangement, Tranche Two [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00% 75.00% 50.00% 50.00%                
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Consultants [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share based compensation by share based arrangement equity instruments other than options granted during the period     137                  
Two Thousand And Fourteen Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Consultants [Member] | Share-based Payment Arrangement, Tranche One [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%                      
Two Thousand And Fourteen Equity Incentive Plan [Member] | Plan Mofification for Certain Employees [Member] | Restricted Stock Units (RSUs) [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   25.00%                    
Two Thousand And Fourteen Equity Incentive Plan [Member] | Plan Mofification for Certain Employees [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche One [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     25.00%                  
Two Thousand And Twenty One Equity Incentive Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           15,000,000.0   15,000,000.0