Summary of Significant Accounting Policies - Allowance for Mortgage Loan Losses (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accounting Policies [Abstract]
Balance at beginning of the period	$ 1,429,487	$ 1,672,003
Provisions for loan losses		18,278
Loan charge-offs		(100,537)
Balance the end of the period	$ 1,429,487	$ 1,589,744