REAL ESTATE INVESTMENTS - Schedule of Real Estate Properties (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Land, Buildings and Improvements	$ 217,494,190
Tenant origination and absorption costs	17,717,819	$ 8,340,774
Accumulated Depreciation and Amortization	(10,563,664)	(3,574,739)	$ (493,185)
Total investments in real estate property, net	224,648,345	$ 135,235,616
Office | Accredo
Real Estate [Line Items]
Land, Buildings and Improvements	9,855,847
Tenant origination and absorption costs	1,053,637
Accumulated Depreciation and Amortization	(1,265,678)
Total investments in real estate property, net	9,643,806
Office | Northrop Grumman
Real Estate [Line Items]
Land, Buildings and Improvements	12,382,991
Tenant origination and absorption costs	1,341,199
Accumulated Depreciation and Amortization	(1,402,927)
Total investments in real estate property, net	12,321,263
Office | exp US Services
Real Estate [Line Items]
Land, Buildings and Improvements	5,920,121
Tenant origination and absorption costs	388,248
Accumulated Depreciation and Amortization	(389,042)
Total investments in real estate property, net	5,919,327
Office | Wyndham
Real Estate [Line Items]
Land, Buildings and Improvements	10,406,483
Tenant origination and absorption costs	669,232
Accumulated Depreciation and Amortization	(461,240)
Total investments in real estate property, net	10,614,475
Office | Williams Sonoma
Real Estate [Line Items]
Land, Buildings and Improvements	8,079,612
Tenant origination and absorption costs	550,486
Accumulated Depreciation and Amortization	(435,346)
Total investments in real estate property, net	8,194,752
Office | EMCOR
Real Estate [Line Items]
Land, Buildings and Improvements	5,960,610
Tenant origination and absorption costs	463,488
Accumulated Depreciation and Amortization	(245,453)
Total investments in real estate property, net	6,178,645
Office | Cummins
Real Estate [Line Items]
Land, Buildings and Improvements	14,465,491
Tenant origination and absorption costs	1,536,998
Accumulated Depreciation and Amortization	(562,814)
Total investments in real estate property, net	15,439,675
Office | Texas Health
Real Estate [Line Items]
Land, Buildings and Improvements	6,976,703
Tenant origination and absorption costs	713,221
Accumulated Depreciation and Amortization	(86,716)
Total investments in real estate property, net	7,603,208
Office | Bon Secours
Real Estate [Line Items]
Land, Buildings and Improvements	10,042,551
Tenant origination and absorption costs	800,356
Accumulated Depreciation and Amortization	(90,731)
Total investments in real estate property, net	10,752,176
Land | Northrop Grumman
Real Estate [Line Items]
Land, Buildings and Improvements	329,410
Tenant origination and absorption costs	0
Accumulated Depreciation and Amortization	0
Total investments in real estate property, net	329,410
Retail | Walgreens, Stockbridge, GA
Real Estate [Line Items]
Land, Buildings and Improvements	4,147,948
Tenant origination and absorption costs	705,423
Accumulated Depreciation and Amortization	(833,561)
Total investments in real estate property, net	4,019,810
Retail | Dollar General, Litchfield
Real Estate [Line Items]
Land, Buildings and Improvements	1,281,812
Tenant origination and absorption costs	116,302
Accumulated Depreciation and Amortization	(85,518)
Total investments in real estate property, net	1,312,596
Retail | Dollar General, Wilton
Real Estate [Line Items]
Land, Buildings and Improvements	1,543,776
Tenant origination and absorption costs	140,653
Accumulated Depreciation and Amortization	(109,445)
Total investments in real estate property, net	1,574,984
Retail | Dollar General, Thompsontown
Real Estate [Line Items]
Land, Buildings and Improvements	1,199,860
Tenant origination and absorption costs	106,730
Accumulated Depreciation and Amortization	(82,167)
Total investments in real estate property, net	1,224,423
Retail | Dollar General, Mt. Gilead
Real Estate [Line Items]
Land, Buildings and Improvements	1,174,188
Tenant origination and absorption costs	111,847
Accumulated Depreciation and Amortization	(78,780)
Total investments in real estate property, net	1,207,255
Retail | Dollar General, Lakeside
Real Estate [Line Items]
Land, Buildings and Improvements	1,112,872
Tenant origination and absorption costs	100,857
Accumulated Depreciation and Amortization	(80,853)
Total investments in real estate property, net	1,132,876
Retail | Dollar General, Castalia
Real Estate [Line Items]
Land, Buildings and Improvements	1,102,086
Tenant origination and absorption costs	86,408
Accumulated Depreciation and Amortization	(78,557)
Total investments in real estate property, net	1,109,937
Retail | Harley
Real Estate [Line Items]
Land, Buildings and Improvements	13,178,288
Tenant origination and absorption costs	0
Accumulated Depreciation and Amortization	(562,523)
Total investments in real estate property, net	12,615,765
Retail | 24 Hour Fitness
Real Estate [Line Items]
Land, Buildings and Improvements	11,453,337
Tenant origination and absorption costs	1,204,973
Accumulated Depreciation and Amortization	(204,887)
Total investments in real estate property, net	12,453,423
Retail | Costco
Real Estate [Line Items]
Land, Buildings and Improvements	27,263,632
Tenant origination and absorption costs	2,765,136
Accumulated Depreciation and Amortization	(54,052)
Total investments in real estate property, net	29,974,716
Industrial | Dana
Real Estate [Line Items]
Land, Buildings and Improvements	8,392,906
Tenant origination and absorption costs	1,210,874
Accumulated Depreciation and Amortization	(1,001,594)
Total investments in real estate property, net	8,602,186
Industrial | Omnicare
Real Estate [Line Items]
Land, Buildings and Improvements	7,262,747
Tenant origination and absorption costs	281,442
Accumulated Depreciation and Amortization	(343,275)
Total investments in real estate property, net	7,200,914
Industrial | Husqvarna
Real Estate [Line Items]
Land, Buildings and Improvements	11,840,200
Tenant origination and absorption costs	1,013,948
Accumulated Depreciation and Amortization	(399,615)
Total investments in real estate property, net	12,454,533
Industrial | AvAir
Real Estate [Line Items]
Land, Buildings and Improvements	27,357,900
Tenant origination and absorption costs	0
Accumulated Depreciation and Amortization	(722,991)
Total investments in real estate property, net	26,634,909
Industrial | 3M
Real Estate [Line Items]
Land, Buildings and Improvements	14,762,819
Tenant origination and absorption costs	2,356,361
Accumulated Depreciation and Amortization	(985,899)
Total investments in real estate property, net	$ 16,133,281