Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 12,159	$ 13,397	$ 38,346	$ 41,746
Total profit from segments	5,065	6,004	15,954	15,630
Multifamily Segment [Member]
Revenues	3,683	3,383	10,943	10,077
Operating expenses	(2,412)	(2,243)	(6,466)	(6,363)
Profit from segment	1,271	1,140	4,477	3,714
Commercial Segment [Member]
Revenues	7,770	8,024	23,518	24,275
Operating expenses	(3,976)	(3,160)	(12,041)	(12,359)
Profit from segment	$ 3,794	$ 4,864	$ 11,477	$ 11,916