Cash, Cash Equivalents and Short-Term Investments - Equity Investments (Details)	9 Months Ended
	Sep. 30, 2020 USD ($)
Cash, Cash Equivalents and Short-Term Investments
Net losses recognized during the nine months on equity securities	$ (367,010)
Less: net gains (losses) recognized during the period on equity securities sold during the period	(804,772)
Unrealized gains recognized during the nine months on equity securities still held at September 30, 2020	$ 437,762