Summary of Significant Accounting Policies - Allowance For Mortgage Loans Receivable (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounting Policies [Abstract]
Balance at beginning of the period	$ 1,429,487
Provisions for loan losses	48,157	$ 73,105
Loan charge-offs		(100,537)
Balance the end of the period	$ 1,477,644	$ 1,644,571