INTANGIBLE LEASE ASSETS AND LIABILITIES - Summary of Estimated Amortization and Accretion (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Future Amortization Amount
Total Intangible Lease Assets—Net	$ 37,112,279	$ 38,758,059
Future Accretion to Income Property Revenue
Total Intangible Lease Liabilities—Net	(28,415,319)	$ (29,770,441)
Net Future Amortization of Intangible Assets and Liabilities
Remainder of 2018	814,877
2019	3,063,619
2020	2,688,926
2021	847,636
2022	183,809
2023	(178,554)
Thereafter	1,276,647
Total	8,696,960
Value of In-Place Leases and Intangible Leasing Costs
Future Amortization Amount
Remainder of 2018	1,370,307
2019	5,452,670
2020	5,011,249
2021	3,320,813
2022	2,702,885
2023	2,359,734
Thereafter	15,162,176
Total Intangible Lease Assets—Net	35,379,834
Value of Below Market, net of Above Market In-Place Leases
Future Accretion to Income Property Revenue
Remainder of 2018	(555,430)
2019	(2,389,051)
2020	(2,322,323)
2021	(2,473,177)
2022	(2,519,076)
2023	(2,538,288)
Thereafter	(13,885,529)
Total Intangible Lease Liabilities—Net	$ (26,682,874)