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Mortgage Notes Payable (Scheduled Principal Payments of Mortgage Notes Payable) (Detail) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
2017 $ 1,597,374 $ 3,771,756
2018 3,881,723 7,366,855
2019 18,780,323 19,917,067
2020 29,358,104 5,066,806
2021 14,494,462 12,081,874
Thereafter 93,669,685 112,624,246
Total 161,781,671 160,828,604
NetREIT Inc [Member]    
Debt Instrument [Line Items]    
2017 871,226 1,927,307
2018 1,931,368 6,213,089
2019 2,286,504 3,153,040
2020 21,157,086 2,569,269
2021 14,494,462 12,081,874
Thereafter 93,669,685 112,624,246
Total 134,410,331 138,568,825
Model Home [Member]    
Debt Instrument [Line Items]    
2017 726,148 1,844,449
2018 1,950,355 1,153,766
2019 16,493,819 16,764,027
2020 8,201,018 2,497,537
Total $ 27,371,340 $ 22,259,779