DEFERRED REVENUE - Rent Paid in Advance (Details) - USD ($)			3 Months Ended		6 Months Ended
	Feb. 21, 2018	Oct. 11, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 31, 2017	Sep. 20, 2017	Dec. 31, 2011
Deferred revenue
Rent payment received		$ 807,000
Period over which rent received in advance is recognized		12 months
Deferred Revenue			$ 6,868,665		$ 6,868,665			$ 2,030,459
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities					28,908,410	$ 46,621,871
Lease Revenue			9,948,000	$ 7,778,000	19,336,000	15,053,000
Master tenant funded incurred related to property acquisition from their leasing reserve escrow	$ 2,250,000		935,000		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		29,000,000
Oil exploration
Deferred revenue
Lease term									13 years
Lease Revenue			201,000	$ 201,000	400,000	$ 400,000
Aspen, Colorado
Deferred revenue
Deferred Revenue			2,400,000		2,400,000
Tenant Contributions	1,500,000				1,500,000
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities	$ 28,000,000
Lease Revenue					41,000
Florida
Deferred revenue
Deferred Revenue			1,800,000		1,800,000
Tenant Contributions					1,900,000
Lease Revenue					54,000
Maximum | Oil exploration
Deferred revenue
Lease term		13 years								8 years
Buc'ees - East of I-95
Deferred revenue
Escrow reserve			831,000		831,000		$ 831,000
Remaining gain to be recognized			$ 831,000		$ 831,000		831,000
Deferred Revenue							$ 25,000