CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Real estate accumulated depreciation	$ 25,655	$ 24,094
Deferred mortgage costs	$ 1,090	$ 1,160
Preferred shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred shares, authorized (in shares)	2,000,000	2,000,000
Preferred shares, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	300,000,000	300,000,000
Common stock, outstanding (in shares)	16,432,000	15,638,000
Mortgages payable
Debt Instrument [Line Items]
Deferred mortgage costs	$ 758	$ 823
Junior subordinated notes
Debt Instrument [Line Items]
Deferred mortgage costs	332	337
Credit Facility, Maturing 2021 | Revolving Credit Facility | Valley National Bank, Affiliate
Debt Instrument [Line Items]
Deferred mortgage costs	$ 0	$ 0