Basis of Presentation and Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Money market accounts – cash equivalents	$ 26,518,566	$ 32,150,342
Cash	19,040,385	18,404,749
Total cash and cash equivalents	45,558,951	50,555,091	$ 34,171,062
Restricted cash	2,500,000	2,500,000	2,500,000
Total cash, cash equivalents and restricted cash	$ 48,058,951	$ 53,055,091	$ 36,671,062	$ 56,114,735