Intangibles, net - Schedule of Estimated Future Amortization of Intangibles (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Finite Lived Intangible Assets And Liabilities [Line Items]
2018	$ 323,774
2019	1,166,441
2020	751,100
2021	313,680
2022	228,155
Thereafter	2,524,222
Intangible assets, net	5,307,372	$ 4,653,504
2018	7,638
2019	30,553
2020	27,103
2021	25,953
2022	25,953
Thereafter	200,294
Below-market lease intangibles	317,494	$ 340,390
2018	7,638
2019	30,553
2020	27,103
2021	25,953
2022	25,953
Thereafter	200,294
Finite-lived intangible liabilities	317,494
In-Place Lease Intangibles
Finite Lived Intangible Assets And Liabilities [Line Items]
2018	56,939
2019	227,754
2020	198,365
2021	188,568
2022	188,568
Thereafter	1,178,248
Intangible assets, net	2,038,442
In-Place Resident Agreement Intangibles
Finite Lived Intangible Assets And Liabilities [Line Items]
2018	256,938
2019	899,100
2020	513,148
2021	85,525
Intangible assets, net	1,754,711
Below-Market Ground Leases
Finite Lived Intangible Assets And Liabilities [Line Items]
2018	9,897
2019	39,587
2020	39,587
2021	39,587
2022	39,587
Thereafter	1,345,974
Intangible assets, net	$ 1,514,219