Note 10 - Segment Reporting - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Total revenues	$ 35,128	$ 32,800	$ 103,338	$ 96,737
Assets	1,239,759		1,239,759		$ 1,229,631
Interest expense	11,527	10,086	32,996	30,076
Capital expenditures	10,756	9,800	28,343	42,404
Property operating expenses	7,930	7,267	22,811	21,734
Real estate taxes and insurance	7,374	8,252	24,610	24,069
General and administrative	3,340	3,209	10,029	9,348
Depreciation and amortization	7,282	6,784	21,376	20,221
Transaction pursuit costs	0	(10)	357	506
Total operating expenses	25,926	25,502	79,183	75,878
Income from operations	9,202	7,298	24,155	20,859
Rental Income [Member]
Total revenues	35,128	32,800	103,338	96,737
Commercial Segment [Member]
Total revenues	9,627	9,692	28,857	29,570
Assets	312,029		312,029		312,404
Interest expense	2,577	2,533	7,584	7,537
Capital expenditures	689	917	2,929	2,545
Property operating expenses	1,248	1,240	3,511	3,567
Real estate taxes and insurance	2,540	2,228	7,069	6,264
General and administrative	606	598	1,792	1,745
Depreciation and amortization	1,457	1,386	4,346	4,108
Transaction pursuit costs		0	0	81
Total operating expenses	5,851	5,452	16,718	15,765
Income from operations	3,776	4,240	12,139	13,805
Commercial Segment [Member] | Rental Income [Member]
Total revenues	9,627	9,692	28,857	29,570
Residential Segment [Member]
Total revenues	25,501	23,108	74,481	67,167
Assets	927,730		927,730		$ 917,227
Interest expense	8,950	7,553	25,412	22,539
Capital expenditures	10,067	8,883	25,414	39,859
Property operating expenses	6,682	6,027	19,300	18,167
Real estate taxes and insurance	4,834	6,024	17,541	17,805
General and administrative	2,734	2,611	8,237	7,603
Depreciation and amortization	5,825	5,398	17,030	16,113
Transaction pursuit costs		(10)	357	425
Total operating expenses	20,075	20,050	62,465	60,113
Income from operations	5,426	3,058	12,016	7,054
Residential Segment [Member] | Rental Income [Member]
Total revenues	$ 25,501	$ 23,108	$ 74,481	$ 67,167