Property Loans, Net of Loan Loss Allowances - Additional Information (Details) - USD ($)		1 Months Ended		12 Months Ended
		Aug. 31, 2019	Jan. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Property Loans Net Of Loan Loss Allowance [Line Items]
Provision for loans loss allowance	[1]			$ 911,232
Contingent interest income				12,043	3,045,462
Live 929 Apartments [Member]
Property Loans Net Of Loan Loss Allowance [Line Items]
Provision for loans loss allowance				911,000
Secured property loan advances				505,000
Total property loan amount		$ 1,000,000.0
Property loan maturity date		Jul. 31, 2049
Ohio Properties [Member]
Property Loans Net Of Loan Loss Allowance [Line Items]
Interest earned on property loan principal				$ 983,000	$ 983,000
Scharbauer Flats Apartments [Member]
Property Loans Net Of Loan Loss Allowance [Line Items]
Percentage of payment of principal and accrued interest on GILs at origination				100.00%
Percentage of decrease in principal and interest payment upon receipt of the certificate of occupancy				50.00%
Percentage of decrease in principal and interest payment upon achievement of 90% occupancy				25.00%
Vantage at Brooks LLC [Member]
Property Loans Net Of Loan Loss Allowance [Line Items]
Contingent interest income			$ 3,000,000.0

[1] ^{The provision for loan loss is related to the Live 929 Apartments property loan.}