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Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Cash and Cash Equivalents [Abstract]      
Cash and cash equivalents $ 3,918,157 $ 6,293,293 $ 2,354,561
Short-term investments 1,992,538 2,480,753  
Total $ 5,910,695 $ 8,774,046