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Organization and Significant Accounting Policies (Details) $ / shares in Units, $ in Millions	Aug. 17, 2017 $ / shares shares	Mar. 31, 2020 USD ($) a $ / shares	Dec. 31, 2019 USD ($) $ / shares	Aug. 10, 2017 shares
Organization and Significant Accounting Policies
Area of real estate property \| a		158,500
Common stock, par value (in dollars per share) \| $ / shares		$ 0.01	$ 0.01
Below Market Lease
Tenant relationship intangibles \| $		$ 1.3	$ 1.3
Tenant relationship intangibles, accumulated amortization \| $		$ 1.3	$ 1.2
Common Units \| Operating Partnership
Organization and Significant Accounting Policies
Ownership interest (as a percent)		94.00%
TRS
Organization and Significant Accounting Policies
Area of real estate property \| a		3,676
Series B Participating Preferred Stock
Organization and Significant Accounting Policies
Shares issued under underwriting agreement \| shares	6,037,500			6,037,500
Preference dividend (as a percent)	6.00%
Par value \| $ / shares	$ 0.01