Related Party Arrangements - Fees and Expenses Incurred and Reimbursable to Affiliates and Related Parties (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Distribution and stockholder servicing fees				$ 1,395,460	$ 549,449
Acquisition fees and expenses				818
Total reimbursable expenses		$ 236,073	$ 227,231	764,371	680,529
Investment Service Fees	[1]	545,625		545,625	481,500
Asset Management Fees	[2]	87,488	42,800	229,088	86,060
Total reimbursable expenses, net		869,186	270,031	1,539,084	1,248,089
Operating expenses, Unpaid amount	[3]	68,844		68,844		$ 197,235
Total reimbursable expenses due	[3]	68,844		68,844		197,235
Related parties, Unpaid amount	[3]	68,844		68,844		197,235
Reimbursable Expense
Related Party Transaction [Line Items]
Operating expenses	[4]	227,393	221,415	754,188	652,824
Acquisition fees and expenses		8,680	5,816	10,183	27,705
Dealer Manager
Related Party Transaction [Line Items]
Selling commissions	[5]	121,413	138,544	343,087	481,913
Dealer manager fees	[5]	153,073	161,461	429,356	422,112
Distribution and stockholder servicing fees	[5]	307,630	239,677	822,477	462,356
Total offering expenses		582,116	$ 539,682	1,594,920	$ 1,366,381
Selling commissions, Unpaid amount	[3]	16,522		16,522		10,000
Dealer Manager fees, Unpaid amount	[3]	25,129		25,129		18,150
Distribution and stockholder servicing fees, Unpaid amount	[3]	1,395,460		1,395,460		798,524
Total offering expenses unpaid	[3]	$ 1,437,111		$ 1,437,111		$ 826,674

[1] For the quarter and nine months ended September 30, 2018 the Company incurred approximately $0.5 million in investment services fees, all of which were capitalized and included in real estate investment properties, net in the accompanying condensed consolidated balance sheets. For the nine months ended September 30, 2017, the Company incurred approximately $0.5 million in investment service fees, all of which were capitalized and included in real estate investment properties, net in the accompanying condensed consolidated balance sheets. No such fees were incurred for the quarter ended September 30, 2017.

[2] For the quarter and nine months ended September 30, 2018, the Company incurred approximately $0.1 million and $0.2 million, respectively, in asset management fees, all of which are expected to be settled in accordance with the terms of the Expense Support Agreement. For the quarter and nine months ended September 30, 2017, the Company incurred approximately $43,000 and $86,000 in asset management fees, respectively, all of which were settled in accordance with the terms of the Expense Support Agreement.

[3] Amounts are recorded as due to related parties in the accompanying condensed consolidated balance sheets.

[4] Amounts are recorded as general and administrative expenses in the accompanying condensed consolidated statements of operations unless such amounts represent prepaid expenses, which are capitalized in the accompanying condensed consolidated balance sheets. For the quarter and nine months ended September 30, 2018, approximately $0.1 million and $0.4 million, respectively, of personnel expenses of affiliates of the Advisor are expected to be settled in accordance with the terms of the Expense Support Agreement and as such our general administrative expenses were reduced by approximately $0.1 million and $0.4 million, respectively. For the quarter and nine months ended September 30, 2017, approximately $0.1 million and $0.3 million, respectively, of personnel expenses of affiliates of the Advisor were settled in accordance with the terms of the Expense Support Agreement.

[5] Amounts are recorded as stock issuance and offering costs in the accompanying condensed consolidated statements of stockholders’ equity.