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Stockholders' Equity - Incentive Plans (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 09, 2014
installment
shares
May 31, 2022
shares
Mar. 31, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
shares
Maximum          
Incentive plans          
Expiration period       10 years  
2003 Stock Incentive Plan          
Incentive plans          
Period from date of termination that any vested options shall expire       60 days  
Expiration period       10 years  
Intrinsic value of options exercised | $         $ 8,668
Cash proceeds from exercise of stock options | $         $ 4,239
Shares issued from exercise of stock options       0 3,785
2003 Stock Incentive Plan | Upon first anniversary of start date          
Incentive plans          
Percent of shares subject to option grant that will vest       25.00%  
2003 Stock Incentive Plan | Each month after the first anniversary          
Incentive plans          
Percent of shares subject to option grant that will vest       2.083%  
2013 Equity Incentive Plan          
Incentive plans          
Period from date of termination that any vested options shall expire 90 days        
Expiration period 10 years        
Unrecognized compensation expense related to unvested options | $       $ 4,197,865  
Period for unrecognized compensation expense related to unvested options yet has not been recognized       2 years 1 month 6 days  
Shares issued from exercise of stock options       0 0
Fair value of shares vested | $       $ 2,060,622 $ 3,745,954
Authorized shares          
Common stock authorized 1,000,000     9,506,767  
Shares available for future grants       1,469,324  
Maximum number of shares that may be issued pursuant to exercise of incentive stock       20,000,000  
Increase in number of shares of common stock   2,619,622      
Maximum percentage of shares of common stock issued and outstanding on the immediately preceding fiscal year, or such lesser number of shares as determined by the board of directors or the compensation committee       4.00%  
2013 Equity Incentive Plan | Upon first anniversary of start date          
Incentive plans          
Percent of shares subject to option grant that will vest 25.00%        
Number of monthly installments | installment 36        
Common Stock          
Incentive plans          
Shares issued from exercise of stock options     3,785