Schedule III - Real Estate and Related Depreciation (Details)	Dec. 31, 2019 USD ($) ft²
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	817,133
Initial cost, Land	$ 6,122,065
Initial cost, Buildings & Improvements	53,470,167
Costs Subsequent to Acquisition	3,191,592
Gross Carrying Amount, Land	6,122,065
Gross Carrying Amount, Buildings & Improvements	56,661,759
Total	62,783,824
Accumulated Depreciation	$ 4,851,946
Clinton, CT
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	30,408	[1]
Initial cost, Land	$ 356,040	[1]
Initial cost, Buildings & Improvements	3,108,285	[1]
Costs Subsequent to Acquisition	14,197	[1]
Gross Carrying Amount, Land	356,040	[1]
Gross Carrying Amount, Buildings & Improvements	3,122,482	[1]
Total	3,478,522	[1]
Accumulated Depreciation	$ 232,486	[1]
Bolingbrook, IL
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	113,700	[2]
Initial cost, Land	$ 633,914	[2]
Initial cost, Buildings & Improvements	5,491,409	[2]
Costs Subsequent to Acquisition	2,439,850	[2]
Gross Carrying Amount, Land	633,914	[2]
Gross Carrying Amount, Buildings & Improvements	7,931,259	[2]
Total	8,565,173	[2]
Accumulated Depreciation	$ 798,681	[2]
Dolton, IL
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	86,590	[2]
Initial cost, Land	$ 614,413	[2]
Initial cost, Buildings & Improvements	5,227,313	[2]
Costs Subsequent to Acquisition	9,611	[2]
Gross Carrying Amount, Land	614,413	[2]
Gross Carrying Amount, Buildings & Improvements	5,236,924	[2]
Total	5,851,337	[2]
Accumulated Depreciation	$ 558,103	[2]
McCordsville, IN
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	82,011	[1]
Initial cost, Land	$ 770,000	[1]
Initial cost, Buildings & Improvements	6,776,000	[1]
Costs Subsequent to Acquisition	46,578	[1]
Gross Carrying Amount, Land	770,000	[1]
Gross Carrying Amount, Buildings & Improvements	6,822,578	[1]
Total	7,592,578	[1]
Accumulated Depreciation	$ 556,094	[1]
Merrillville, IN
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	80,570	[2]
Initial cost, Land	$ 597,229	[2]
Initial cost, Buildings & Improvements	5,104,011	[2]
Costs Subsequent to Acquisition	464,324	[2]
Gross Carrying Amount, Land	597,229	[2]
Gross Carrying Amount, Buildings & Improvements	5,568,335	[2]
Total	6,165,564	[2]
Accumulated Depreciation	$ 565,840	[2]
Millbrook, NY
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	12,676	[1]
Initial cost, Land	$ 423,960	[1]
Initial cost, Buildings & Improvements	2,900,895	[1]
Costs Subsequent to Acquisition	56,250	[1]
Gross Carrying Amount, Land	423,960	[1]
Gross Carrying Amount, Buildings & Improvements	2,957,145	[1]
Total	3,381,105	[1]
Accumulated Depreciation	$ 203,530	[1]
Rochester, NY
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	68,106	[2]
Initial cost, Land	$ 571,583	[2]
Initial cost, Buildings & Improvements	5,227,630	[2]
Costs Subsequent to Acquisition	12,983	[2]
Gross Carrying Amount, Land	571,583	[2]
Gross Carrying Amount, Buildings & Improvements	5,240,613	[2]
Total	5,812,196	[2]
Accumulated Depreciation	$ 517,652	[2]
Lima, OH
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	98,265	[1]
Initial cost, Land	$ 530,000	[1]
Initial cost, Buildings & Improvements	4,664,000	[1]
Costs Subsequent to Acquisition	99,237	[1]
Gross Carrying Amount, Land	530,000	[1]
Gross Carrying Amount, Buildings & Improvements	4,763,237	[1]
Total	5,293,237	[1]
Accumulated Depreciation	$ 395,563	[1]
Sadsburyville, PA
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	78,847	[2]
Initial cost, Land	$ 462,749	[2]
Initial cost, Buildings & Improvements	5,146,579	[2]
Costs Subsequent to Acquisition	28,362	[2]
Gross Carrying Amount, Land	462,749	[2]
Gross Carrying Amount, Buildings & Improvements	5,174,941	[2]
Total	5,637,690	[2]
Accumulated Depreciation	$ 544,462	[2]
West Henrietta, NY
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	48,250	[1]
Initial cost, Land	$ 628,251	[1]
Initial cost, Buildings & Improvements	5,229,481	[1]
Gross Carrying Amount, Land	628,251	[1]
Gross Carrying Amount, Buildings & Improvements	5,229,481	[1]
Total	5,857,732	[1]
Accumulated Depreciation	$ 16,074	[1]
SSG Summerville I LLC | Summerville, SC
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	74,500	[2],[3]
Initial cost, Land	$ 345,160	[2]
Initial cost, Buildings & Improvements	2,989,159	[2]
Costs Subsequent to Acquisition	5,475	[2]
Gross Carrying Amount, Land	345,160	[2]
Gross Carrying Amount, Buildings & Improvements	2,994,634	[2]
Total	3,339,794	[2]
Accumulated Depreciation	$ 300,260	[2]
SSG Summerville II LLC | Summerville, SC
Real Estate And Accumulated Depreciation [Line Items]
Square Footage | ft²	43,210	[2],[4]
Initial cost, Land	$ 188,766	[2]
Initial cost, Buildings & Improvements	1,605,405	[2]
Costs Subsequent to Acquisition	14,725	[2]
Gross Carrying Amount, Land	188,766	[2]
Gross Carrying Amount, Buildings & Improvements	1,620,130	[2]
Total	1,808,896	[2]
Accumulated Depreciation	$ 163,201	[2]

[1] This property is held as collateral under the Revolver with an outstanding balance of $4,914,000 as of December 31, 2019

[2] This property is held as collateral under the Loan Agreement with an outstanding balance of $19,338,556 as of December 31, 2019.

[3] SSG Summerville I LLC.

[4] SSG Summerville II LLC