INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details 2) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS:
Cash and cash equivalents and restricted cash	$ 4,182,755	$ 4,182,755	$ 3,677,373	$ 200,815
RuMartin Street Santa Clara [Member]
ASSETS:
Real estate investments, net	32,587,034	32,587,034
Cash and cash equivalents	615,436	615,436
Other assets	103,700	103,700
Total assets	33,306,170	33,306,170
LIABILITIES
Mortgage notes payable, net	14,235,256	14,235,256
Below-market lease, net	3,247,480	3,247,480
Other liabilities	246,085	246,085
Total liabilities	17,728,821	17,728,821
TOTAL EQUITY	15,577,349	15,577,349
TOTAL LIABILITIES AND EQUITY	33,306,170	33,306,170
TOTAL STOCKHOLDER EQUITY	15,577,349	15,577,349
TOTAL LIABILITIES, REDEEMABLE COMMON STOCK AND STOCKHOLDER'S EQUITY	33,306,170	33,306,170
TOTAL REVENUE	757,850
EXPENSES:
Interest expense	154,339
Depreciation and amortization	410,722
Other expense	151,477
Total expenses	716,538
NET INCOME	41,312
OTHER INCOME:
NET INCOME (LOSS)	41,312
Rich Uncles Real Estate Investment Trust 1 [Member]
ASSETS:
Real estate investments, net	131,166,670	131,166,670	105,462,499
Cash and cash equivalents and restricted cash	6,027,807	6,027,807	13,465,152
Other assets	2,658,777	2,658,777	2,479,919
Total assets	139,853,254	139,853,254	121,407,570
LIABILITIES
Mortgage notes payable, net	62,277,387	62,277,387	38,705,103
Below-market lease, net	3,966,008	3,966,008	4,841,757
Other liabilities	2,937,247	2,937,247	3,266,878
Total liabilities	69,180,642	69,180,642	46,813,738
TOTAL EQUITY	70,086,370	70,086,370	73,364,188
TOTAL LIABILITIES AND EQUITY	139,853,254	139,853,254	121,407,570
REDEEMABLE COMMON STOCK	586,242	586,242	1,229,644
TOTAL STOCKHOLDER EQUITY	70,086,370	70,086,370	73,364,188
TOTAL LIABILITIES, REDEEMABLE COMMON STOCK AND STOCKHOLDER'S EQUITY	$ 139,853,254	139,853,254	121,407,570
TOTAL REVENUE		12,816,460	6,414,592
EXPENSES:
Interest expense		2,503,810	768,122
Depreciation and amortization		5,654,451	3,134,979
Other expense		4,033,242	4,403,040
Total expenses		12,191,503	8,306,141
NET INCOME		1,395,047	(1,891,388)
OTHER INCOME:
Gain on sale of real estate investment property, net		747,957	0
Other income		22,133	161
Total other income		770,090	161
NET INCOME (LOSS)		$ 1,395,047	$ (1,891,388)