DEFERRED REVENUE - Rent Paid in Advance (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 21, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Deferred revenue
Lease revenue		$ 11,473,000	$ 10,375,000	$ 22,476,000	$ 21,099,000
Tenant contribution				1,000,000.0
Total deferred revenue		5,178,851		5,178,851		$ 5,830,720
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities				138,454,504	$ 41,448,286
Master tenant funded incurred related to property acquisition from their leasing reserve escrow		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		29,000,000.0		29,000,000.0
Aspen, Colorado
Deferred revenue
Lease revenue				284,000
Tenant contribution	$ 1,500,000
Total deferred revenue		2,200,000		2,200,000
Acquisition of Property, Plant, and Equipment and Intangible Lease Assets and Liabilities	$ 28,000,000.0
Florida
Deferred revenue
Lease revenue				238,000
Tenant contribution				1,900,000
Total deferred revenue		$ 651,000		651,000
Cocina 214
Deferred revenue
Lease revenue				$ 690,000