Commitments and Contingencies - Additional Information (Detail) - USD ($)
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1 Months Ended |
9 Months Ended |
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Jan. 09, 2017 |
Oct. 31, 2017 |
Jul. 31, 2017 |
Apr. 30, 2017 |
Oct. 31, 2016 |
Jul. 31, 2016 |
Apr. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Apr. 13, 2017 |
| Commitments and Contingencies [Line Items] |
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| Redemptions of common stock, value |
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$ 116
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| Distribution Reinvestment Plan |
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| Commitments and Contingencies [Line Items] |
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| Amendment, suspension or termination period for distribution reinvestment Plan |
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10 days
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| Sales commissions, dealer manager fee, or stockholder servicing fee payable |
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$ 0
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| Share Redemption Program |
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| Commitments and Contingencies [Line Items] |
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| Amendment, suspension or termination period of share |
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30 days
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| Maximum weighted-average number of shares outstanding percentage |
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5.00%
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| Redemptions of common stock (in shares) |
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160,000
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110,000
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| Redemptions of common stock, value |
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$ 460,000
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$ 380,000
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$ 370,000
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$ 160,000
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$ 530,000
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$ 1,500,000
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$ 1,100,000
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| Share Redemption Program | Subsequent Event |
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| Commitments and Contingencies [Line Items] |
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| Redemptions of common stock, value |
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$ 650,000
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| Share Redemption Program | Minimum |
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| Commitments and Contingencies [Line Items] |
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| Shareholders share holding period |
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1 year
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| Operating Partnership Redemption Rights |
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| Commitments and Contingencies [Line Items] |
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| Number of shares issuable upon conversion of partnership units |
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1
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| Requisite minimum outstanding period for conversion eligibility |
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1 year
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| Class A and Class T Common Stock | Distribution Reinvestment Plan |
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| Commitments and Contingencies [Line Items] |
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| Estimated value per share under distribution reinvestment plan |
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$ 10.22
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| Class A Common stock | Distribution Reinvestment Plan |
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| Commitments and Contingencies [Line Items] |
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| Shares issued pursuant to distribution reinvestment plan |
1,100,000
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1,000,000
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| Class T Common stock | Distribution Reinvestment Plan |
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| Commitments and Contingencies [Line Items] |
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| Shares issued pursuant to distribution reinvestment plan |
100,000
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200,000
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