DEFERRED REVENUE - Rent Paid in Advance (Details) - USD ($)		3 Months Ended
	Feb. 21, 2018	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Sep. 27, 2017	Dec. 31, 2011
Deferred revenue
Lease revenue		$ 11,003,000	$ 10,724,000
Tenant contribution		1,000,000
Total deferred revenue		5,634,425		$ 5,830,720
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities		137,997,353	$ 188,112
Master tenant funded incurred related to property acquisition from their leasing reserve escrow		935,000
Aggregate contributions related to total acquisition cost will be recognized into income property rental revenue over the remaining term of the lease		29,000,000
Oil exploration
Deferred revenue
Lease Payment		10,633,805
Aspen, Colorado
Deferred revenue
Lease revenue		254,000
Tenant contribution	$ 1,500,000
Total deferred revenue		2,200,000
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities	$ 28,000,000
Florida
Deferred revenue
Lease revenue		225,000
Tenant contribution		1,900,000
Total deferred revenue		$ 664,000
Maximum | Oil exploration
Deferred revenue
Lease term		8 years			13 years	8 years
Cocina 214
Deferred revenue
Lease revenue		$ 690,000