Variable Interest Entities - Variable Interest Entities Property Asset Carrying Value and Maximum Exposure (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Available for Sale Security and Property Loan Receivable, Maximum Exposure	$ 123,290,727	$ 117,436,864
Mortgage Revenue Bonds [Member]
Accounts Notes And Loans Receivable [Line Items]
Available for Sale Security and Property Loan Receivable, Maximum Exposure	24,647,000	30,455,000
Investment in Unconsolidated Entities [Member]
Accounts Notes And Loans Receivable [Line Items]
Available for Sale Security and Property Loan Receivable, Maximum Exposure	$ 98,643,727	$ 86,981,864