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Stockholders' Equity - Inducement Plan (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 09, 2014
installment
shares
May 31, 2022
shares
Jan. 31, 2022
USD ($)
shares
Aug. 31, 2021
shares
Jan. 31, 2020
installment
shares
Mar. 31, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
shares
Dec. 31, 2021
shares
Inducement Plan                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Period from date of termination that any vested options shall expire         90 days        
Expiration period         10 years        
Unrecognized compensation expense related to unvested options | $             $ 1,645,467    
Period for unrecognized compensation expense related to unvested options yet has not been recognized             3 years 2 months 12 days    
Increase in number of shares of common stock     3,000,000 2,000,000          
Shares available for future grants             848,424    
Stock options granted             335,000    
Fair value of shares vested | $             $ 20,002 $ 17,591  
Inducement Plan | Upon first anniversary of start date                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Vesting percentage         25.00%        
Inducement Plan | Each month after the first anniversary                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Number of monthly installments | installment         36        
2013 Equity Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Period from date of termination that any vested options shall expire 90 days                
Expiration period 10 years                
Common stock authorized 1,000,000           9,506,767    
Period for unrecognized compensation expense related to unvested options yet has not been recognized             2 years 1 month 6 days    
Increase in number of shares of common stock   2,619,622              
Shares available for future grants             1,469,324    
Stock options granted             1,980,800    
Fair value of shares vested | $             $ 2,060,622 $ 3,745,954  
Options exercised             0 0  
2013 Equity Incentive Plan | Stock options vesting based on performance                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Vesting percentage     50.00%            
Maximum fair value of option excluded from the unrecognized compensation expense | $             $ 825,353    
2013 Equity Incentive Plan | Stock options vesting based on performance | Employees                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Stock options granted     202,600            
Maximum fair value of option excluded from the unrecognized compensation expense | $     $ 162,080            
2013 Equity Incentive Plan | Stock options vesting based on performance | Newly hired employees                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Stock options granted             584,200   584,200
2013 Equity Incentive Plan | Upon first anniversary of start date                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Vesting percentage 25.00%                
Number of monthly installments | installment 36                
2013 Equity Incentive Plan | Vesting upon FDA Approval | Stock options vesting based on performance                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Vesting percentage     50.00%            
Common Stock                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Options exercised           3,785      
Common Stock | Inducement Plan                  
Share-based Compensation Arrangement by Share-based Payment Award                  
Common stock authorized         500,000