Fair Value - Schedule of Fair Value of Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Financial assets:
Cash and cash equivalents	$ 49,581	$ 27,913
Restricted cash	973	1,400	$ 1,283	$ 986
Rent and other receivables	1,103	569
Financial liabilities:
Dividends payable	1,602	1,333
Accounts payable and accrued expenses	4,327	5,234
Secured revolving credit facility	0	40,000
Term loan payable		50,000
Mortgage notes payable	502,927	379,187
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	49,581	27,913
Restricted cash	973	1,400
Rent and other receivables	1,103	569
Financial liabilities:
Dividends payable	1,602	1,333
Accounts payable and accrued expenses	4,327	5,234
Secured revolving credit facility		40,000
Term loan payable		50,000
Mortgages [Member]
Financial liabilities:
Mortgage notes payable	502,927	379,187
Mortgages [Member] | Estimate of Fair Value Measurement [Member]
Financial liabilities:
Mortgage notes payable	$ 464,358	$ 345,009