Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Percentage of real estate investment trust taxable income distributed for exemption of federal income tax	90.00%
Unrecognized tax benefits	$ 0
Accounts Payable and Accrued Expenses
Summary Of Significant Accounting Policies [Line Items]
Contingent payment	$ 900,000		$ 900,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of buildings and improvements	5 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of buildings and improvements	39 years
ASU 2016-18
Summary Of Significant Accounting Policies [Line Items]
Restricted cash		$ 51,250