Acquisitions (Details 1) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Business Combinations [Abstract]
Investment properties		$ 2,050	$ 2,055
Investment in other company		351	$ 1,806
Less: Non-controlling interest	[1]	(182)
Total assets acquired at fair value		$ 5,118

[1] Attributable to the 25% non-controlling membership interest in a limited liability company that owns a vacant land site located in Northern California.