COMMERCIAL LOAN INVESTMENTS - Summary of Commercial Loan Investments (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 41,445,000
Current Face Amount	41,445,000
Carrying Value	39,658,204
Impairment / CECL Reserve	(1,904,500)
First Mortgage, 72-Acre Land Parcel, Orlando, FL
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	8,000,000
Current Face Amount	8,000,000
Carrying Value	$ 7,967,650
Interest rate (as a percent)	12.00%
Mortgage Note, 400 Josephine Street, Austin, TX
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 8,250,000
Current Face Amount	8,250,000
Carrying Value	$ 8,228,421
Interest rate (as a percent)	11.50%
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	$ 2,053,118
Interest rate (as a percent)	7.50%
First Mortgage, Redevelopment Property Honolulu, Hawaii
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 3,500,000
Current Face Amount	3,500,000
Carrying Value	$ 3,445,067
Interest rate (as a percent)	11.00%
First Mortgage – 12-Acre Land Parcel, Daytona Beach, FL [Member]
Mortgage Loans On Real Estate [Line Items]
Original Face Amount	$ 3,375,000
Current Face Amount	3,375,000
Carrying Value	$ 3,328,939
Interest rate (as a percent)	9.50%
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	$ 16,539,509