COMMERCIAL LOAN INVESTMENTS - Summary of Commercial Loan Investments (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 18,320,000
Current Face Amount	18,320,000	$ 34,570,000
Carrying Value	18,488,912	$ 34,625,173
LPGA Buyer Loan - Daytona Beach, FL
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	2,070,000
Current Face Amount	2,070,000
Carrying Value	$ 1,853,839
Interest rate (as a percent)	7.50%
Carpenter Hotel-400 Josephine Street, Austin, TX
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 16,250,000
Current Face Amount	16,250,000
Carrying Value	$ 16,635,073