INVESTMENTS IN UNCONSOLIDATED ENTITIES - Summarized Financial Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents and restricted cash	$ 6,936,930	$ 8,755,928	$ 4,182,755
The TIC Interest
Assets:
Real estate investments, net	30,858,240	31,668,300
Cash and cash equivalents	275,760	466,379
Other assets	228,770	117,075
Total assets	31,362,770	32,251,754
Liabilities:
Mortgage notes payable, net	13,746,635	13,994,844
Below-market lease, net	2,953,360	3,103,778
Other liabilities	68,587	61,188
Total liabilities	16,768,582	17,159,810
Total shareholders' equity	14,594,188	15,091,944
Total liabilities, redeemable common stock and shareholders' equity	31,362,770	32,251,754
Total revenue	2,705,126	2,678,110
Expenses:
Depreciation and amortization	993,564	991,621
Interest expense	574,086	584,059
Other expenses	731,044	730,448
Total expenses	2,298,694	2,306,128
Other income:
Net loss	406,432	371,982
Rich Uncles Real Estate Investment Trust I (“REIT I”)
Assets:
Real estate investments, net	0	125,075,537
Cash and cash equivalents and restricted cash	0	3,376,145
Other assets	0	3,070,475
Total assets	0	131,522,157
Liabilities:
Mortgage notes payable, net	0	61,446,068
Below-market lease, net	0	3,105,843
Other liabilities	0	3,359,618
Total liabilities	0	67,911,529
Redeemable common stock	0	163,572
Total shareholders' equity	0	63,447,056
Total liabilities, redeemable common stock and shareholders' equity	0	131,522,157
Total revenue	13,132,226	13,166,631
Expenses:
Depreciation and amortization	5,787,709	5,783,643
Interest expense	3,425,625	2,813,430
Other expenses	5,342,365	4,603,963
Impairment of real estate investment property	0	862,190
Total expenses	14,555,699	14,063,226
Other income:
Gain on sale of real estate investment property, net	(1,850,845)	0
Loss on debt restructuring	1,964,618	0
Total other income	113,773	0
Net loss	$ (1,309,700)	$ (896,595)