Debt - Schedule of principal balances of mortgage loans payable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	May 31, 2022	Jul. 23, 2021
Debt Instrument [Line Items]
Outstanding balance	$ 248,890	$ 241,988
Unamortized deferred financing costs	(1,275)	(1,364)
Total Debt	$ 247,615	240,624
Loan
Debt Instrument [Line Items]
Interest rate	2.80%
Revolving Credit Facility(1) | Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Outstanding balance	$ 16,000	9,000
Revolving Credit Facility(1) | Revolving credit facility | Line of credit | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.48%
2021 Credit Facility | Unsecured debt | Line of credit
Debt Instrument [Line Items]
Outstanding balance	$ 75,000	75,000
2021 Credit Facility | Unsecured debt | Line of credit | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.43%
Vision Bank | Loan
Debt Instrument [Line Items]
Outstanding balance	$ 1,409	1,409
Interest rate	3.69%
First Oklahoma Bank loan
Debt Instrument [Line Items]
Interest rate				3.625%
First Oklahoma Bank loan | Loan
Debt Instrument [Line Items]
Outstanding balance	$ 312	316
Interest rate	3.63%
Vision Bank – 2018 | Loan
Debt Instrument [Line Items]
Outstanding balance	$ 844	844
Interest rate	3.69%
Seller Financing | Loan
Debt Instrument [Line Items]
Outstanding balance	$ 100	194
Interest rate	6.00%
AIG – December 2020 | Loan
Debt Instrument [Line Items]
Outstanding balance	$ 30,225	30,225
Interest rate	2.80%
2022 Credit Facility | Unsecured debt | Line of credit
Debt Instrument [Line Items]
Outstanding balance	$ 125,000	$ 125,000
Total Debt			$ 25,000