Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock incentive plan and other information (Details)

v3.21.1
Stock-Based Compensation - Stock incentive plan and other information (Details) - USD ($)
3 Months Ended
Sep. 05, 2019
Mar. 20, 2007
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2010
Sep. 17, 2020
Sep. 24, 2018
Sep. 07, 2017
Aug. 25, 2016
May 15, 2015
Oct. 22, 2013
Nov. 02, 2010
Share-based Compensation Arrangement by Share-based Payment Award                        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options     $ 585,000                  
General and Administrative Expenses and Research and Development Expense [Member] | Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Allocated Share-based Compensation Expense     49,000,000 $ 55,000,000                
Consultant [Member] | General and Administrative Expenses and Research and Development Expense [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Allocated Share-based Compensation Expense     $ 52,000,000   $ 28,000,000              
2007 Stock Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   71,429 5,145                  
2007 Stock Plan [Member] | Maximum [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   7,143                    
2010 Stock Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number     1,540,000                 85,714
2010 Stock Plan [Member] | Board of Directors [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number     2,452,273                  
2010 Stock Plan [Member] | Maximum [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 4,000,000                      
Common Stock, Capital Shares Reserved for Future Issuance             1,000,000 500,000 400,000 228,572 171,429  
2010 Stock Plan [Member] | Minimum [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 1,000,000                      
Common Stock, Capital Shares Reserved for Future Issuance             500,000 400,000 228,572 171,429 85,714  
2020 Stock Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number           4,000,000