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Shareholder Equity and Noncontrolling Interests - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2017
Aug. 04, 2017
Class Of Stock [Line Items]        
Dividends paid   $ 0 $ 126,000  
OP Units issued 166,604 166,604 166,604  
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable $ 1,654,000      
OP Units outstanding 3,035,654 3,035,654 3,035,654  
OP Units redemption value $ 29,962,000 $ 29,962,000 $ 29,962,000  
Stock price $ 9.87 $ 9.87 $ 9.87  
Subsequent Event        
Class Of Stock [Line Items]        
At-the-market sales agreement, common stock par value per share       $ 0.01
At-the-market agreement to sell common shares, maximum offer price       150,000
At-the-market agreement to sell common shares, compensation to sales agents       2.00%
At-the-market sales agreement, obligation to sell common shares       $ 0