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Short-term Investments - Summary of Available-for-sale Securities (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Cost $ 58,067,588  
Gross Unrealized Gains 0  
Gross Unrealized Losses (528,736)  
Fair Market Value 57,538,852  
Mutual funds    
Debt Securities, Available-for-sale [Line Items]    
Cost 57,842,955 $ 66,599,219
Gross Unrealized Gains 0 754,709
Gross Unrealized Losses (528,084) (15,911)
Fair Market Value 57,314,871 $ 67,338,017
US corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cost 224,633  
Gross Unrealized Gains 0  
Gross Unrealized Losses (652)  
Fair Market Value $ 223,981  
Maximum | US corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Contractual maturity 2 years