Schedule III-Real Estate Assets and Accumulated Depreciation and Amortization - Schedule of Properties (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Encumbrances	$ 125,022,937
Land	41,126,391
Buildings & Improvements	191,653,068
Total	232,779,459
Costs Capitalized Subsequent to Acquisition	2,432,550
Land	41,126,391
Buildings & Improvements	194,085,618
Total	235,212,009	$ 138,810,355	$ 33,245,041
Accumulated Depreciation and Amortization	(10,563,664)
Net	224,648,345
Accredo
Real Estate [Line Items]
Encumbrances	4,837,224
Land	1,706,641
Buildings & Improvements	9,003,859
Total	10,710,500
Costs Capitalized Subsequent to Acquisition	198,986
Land	1,706,641
Buildings & Improvements	9,202,843
Total	10,909,484
Accumulated Depreciation and Amortization	(1,265,678)
Net	9,643,806
Walgreens
Real Estate [Line Items]
Encumbrances	2,159,245
Land	1,033,105
Buildings & Improvements	3,820,266
Total	4,853,371
Costs Capitalized Subsequent to Acquisition	0
Land	1,033,105
Buildings & Improvements	3,820,266
Total	4,853,371
Accumulated Depreciation and Amortization	(833,561)
Net	4,019,810
Dollar General
Real Estate [Line Items]
Encumbrances	645,791
Land	293,912
Buildings & Improvements	1,104,202
Total	1,398,114
Costs Capitalized Subsequent to Acquisition	0
Land	293,912
Buildings & Improvements	1,104,202
Total	1,398,114
Accumulated Depreciation and Amortization	(85,518)
Net	1,312,596
Dollar General
Real Estate [Line Items]
Encumbrances	651,085
Land	212,036
Buildings & Improvements	1,472,393
Total	1,684,429
Costs Capitalized Subsequent to Acquisition	0
Land	212,036
Buildings & Improvements	1,472,393
Total	1,684,429
Accumulated Depreciation and Amortization	(109,445)
Net	1,574,984
Dollar General
Real Estate [Line Items]
Encumbrances	651,085
Land	217,912
Buildings & Improvements	1,088,678
Total	1,306,590
Costs Capitalized Subsequent to Acquisition	0
Land	217,912
Buildings & Improvements	1,088,678
Total	1,306,590
Accumulated Depreciation and Amortization	(82,167)
Net	1,224,423
Dollar General
Real Estate [Line Items]
Encumbrances	645,791
Land	283,578
Buildings & Improvements	1,002,456
Total	1,286,034
Costs Capitalized Subsequent to Acquisition	0
Land	283,578
Buildings & Improvements	1,002,457
Total	1,286,035
Accumulated Depreciation and Amortization	(78,780)
Net	1,207,255
Dollar General
Real Estate [Line Items]
Encumbrances	645,791
Land	176,515
Buildings & Improvements	1,037,214
Total	1,213,729
Costs Capitalized Subsequent to Acquisition	0
Land	176,515
Buildings & Improvements	1,037,214
Total	1,213,729
Accumulated Depreciation and Amortization	(80,853)
Net	1,132,876
Dollar General
Real Estate [Line Items]
Encumbrances	645,791
Land	154,676
Buildings & Improvements	1,033,817
Total	1,188,493
Costs Capitalized Subsequent to Acquisition	0
Land	154,676
Buildings & Improvements	1,033,818
Total	1,188,494
Accumulated Depreciation and Amortization	(78,557)
Net	1,109,937
Dana
Real Estate [Line Items]
Encumbrances	4,632,398
Land	1,290,863
Buildings & Improvements	8,312,917
Total	9,603,780
Costs Capitalized Subsequent to Acquisition	0
Land	1,290,863
Buildings & Improvements	8,312,917
Total	9,603,780
Accumulated Depreciation and Amortization	(1,001,594)
Net	8,602,186
Northrop Grumman | Office
Real Estate [Line Items]
Encumbrances	5,809,367
Land	1,191,024
Buildings & Improvements	12,533,166
Total	13,724,190
Costs Capitalized Subsequent to Acquisition	0
Land	1,191,024
Buildings & Improvements	12,533,166
Total	13,724,190
Accumulated Depreciation and Amortization	(1,402,927)
Net	12,321,263
Northrop Grumman | Land
Real Estate [Line Items]
Encumbrances	0
Land	329,410
Buildings & Improvements	0
Total	329,410
Costs Capitalized Subsequent to Acquisition	0
Land	329,410
Buildings & Improvements	0
Total	329,410
Accumulated Depreciation and Amortization	0
Net	329,410
exp US Services
Real Estate [Line Items]
Encumbrances	3,446,493
Land	785,801
Buildings & Improvements	5,522,567
Total	6,308,368
Costs Capitalized Subsequent to Acquisition	0
Land	785,801
Buildings & Improvements	5,522,568
Total	6,308,369
Accumulated Depreciation and Amortization	(389,042)
Net	5,919,327
Harley
Real Estate [Line Items]
Encumbrances	6,868,255
Land	1,145,196
Buildings & Improvements	12,033,092
Total	13,178,288
Costs Capitalized Subsequent to Acquisition	0
Land	1,145,196
Buildings & Improvements	12,033,092
Total	13,178,288
Accumulated Depreciation and Amortization	(562,523)
Net	12,615,765
Wyndham
Real Estate [Line Items]
Encumbrances	5,820,600
Land	4,144,069
Buildings & Improvements	5,972,433
Total	10,116,502
Costs Capitalized Subsequent to Acquisition	959,213
Land	4,144,069
Buildings & Improvements	6,931,646
Total	11,075,715
Accumulated Depreciation and Amortization	(461,240)
Net	10,614,475
Williams-Sonoma
Real Estate [Line Items]
Encumbrances	4,615,800
Land	3,546,744
Buildings & Improvements	4,028,821
Total	7,575,565
Costs Capitalized Subsequent to Acquisition	1,054,532
Land	3,546,744
Buildings & Improvements	5,083,354
Total	8,630,098
Accumulated Depreciation and Amortization	(435,346)
Net	8,194,752
Omnicare
Real Estate [Line Items]
Encumbrances	4,349,963
Land	800,772
Buildings & Improvements	6,523,599
Total	7,324,371
Costs Capitalized Subsequent to Acquisition	219,818
Land	800,772
Buildings & Improvements	6,743,417
Total	7,544,189
Accumulated Depreciation and Amortization	(343,275)
Net	7,200,914
EMCOR
Real Estate [Line Items]
Encumbrances	2,911,577
Land	427,589
Buildings & Improvements	5,996,509
Total	6,424,098
Costs Capitalized Subsequent to Acquisition	0
Land	427,589
Buildings & Improvements	5,996,509
Total	6,424,098
Accumulated Depreciation and Amortization	(245,453)
Net	6,178,645
Husqvarna
Real Estate [Line Items]
Encumbrances	6,379,182
Land	974,663
Buildings & Improvements	11,879,485
Total	12,854,148
Costs Capitalized Subsequent to Acquisition	0
Land	974,663
Buildings & Improvements	11,879,485
Total	12,854,148
Accumulated Depreciation and Amortization	(399,615)
Net	12,454,533
AvAir
Real Estate [Line Items]
Encumbrances	14,575,000
Land	3,493,673
Buildings & Improvements	23,864,226
Total	27,357,899
Costs Capitalized Subsequent to Acquisition	0
Land	3,493,673
Buildings & Improvements	23,864,227
Total	27,357,900
Accumulated Depreciation and Amortization	(722,991)
Net	26,634,909
3M
Real Estate [Line Items]
Encumbrances	8,360,000
Land	758,780
Buildings & Improvements	16,360,400
Total	17,119,180
Costs Capitalized Subsequent to Acquisition	0
Land	758,780
Buildings & Improvements	16,360,400
Total	17,119,180
Accumulated Depreciation and Amortization	(985,899)
Net	16,133,281
Cummins
Real Estate [Line Items]
Encumbrances	8,530,000
Land	3,347,960
Buildings & Improvements	12,654,529
Total	16,002,489
Costs Capitalized Subsequent to Acquisition	0
Land	3,347,960
Buildings & Improvements	12,654,529
Total	16,002,489
Accumulated Depreciation and Amortization	(562,814)
Net	15,439,675
24 Hour Fitness
Real Estate [Line Items]
Encumbrances	8,900,000
Land	3,121,985
Buildings & Improvements	9,536,325
Total	12,658,310
Costs Capitalized Subsequent to Acquisition	0
Land	3,121,985
Buildings & Improvements	9,536,325
Total	12,658,310
Accumulated Depreciation and Amortization	(204,887)
Net	12,453,423
Texas Health
Real Estate [Line Items]
Encumbrances	4,842,500
Land	1,827,914
Buildings & Improvements	5,862,010
Total	7,689,924
Costs Capitalized Subsequent to Acquisition	0
Land	1,827,914
Buildings & Improvements	5,862,010
Total	7,689,924
Accumulated Depreciation and Amortization	(86,716)
Net	7,603,208
Bon Secours
Real Estate [Line Items]
Encumbrances	5,250,000
Land	1,658,659
Buildings & Improvements	9,184,248
Total	10,842,907
Costs Capitalized Subsequent to Acquisition	0
Land	1,658,659
Buildings & Improvements	9,184,248
Total	10,842,907
Accumulated Depreciation and Amortization	(90,731)
Net	10,752,176
Costco
Real Estate [Line Items]
Encumbrances	18,850,000
Land	8,202,915
Buildings & Improvements	21,825,853
Total	30,028,768
Costs Capitalized Subsequent to Acquisition	0
Land	8,202,915
Buildings & Improvements	21,825,853
Total	30,028,768
Accumulated Depreciation and Amortization	(54,052)
Net	$ 29,974,716