Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Total revenues	$ 5,070	$ 5,963	$ 18,539	$ 11,665
Costs and Expenses:
Total expenses	7,419	8,018	19,343	17,282
Operating loss	(2,349)	(2,055)	(804)	(5,617)
Other Income:
Investment income	346	95	629	198
Other loss, net	(10)	(275)	(24)	(289)
Total other income (loss)	336	(180)	605	(91)
Loss from operations before equity in earnings of unconsolidated joint ventures	(2,013)	(2,235)	(199)	(5,708)
Equity in earnings of unconsolidated joint ventures, net	652	1,560	819	1,788
(Loss) income before income tax expense	(1,361)	(675)	620	(3,920)
Income tax (benefit) expense	(348)	(472)	178	(1,804)
Net (loss) income	(1,013)	(203)	442	(2,116)
Net loss attributable to non-controlling interest	(16)	(27)	(18)	(38)
Net (loss) income attributable to common stockholders	$ (997)	$ (176)	$ 460	$ (2,078)
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ (0.04)	$ (0.01)	$ 0.02	$ (0.10)
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ (0.04)	$ (0.01)	$ 0.02	$ (0.10)
Real estate - commercial/industrial
Other Income:
Equity in earnings of unconsolidated joint ventures, net	$ 652	$ 1,560	$ 819	$ 1,788
(Loss) income before income tax expense	1,453	1,741	2,455	2,415
Real estate - resort/residential
Costs and Expenses:
Total expenses	433	500	848	1,130
Mineral resources
Other Income:
Loss from operations before equity in earnings of unconsolidated joint ventures	905	990	5,805	1,667
Ranch operations
Other Income:
Loss from operations before equity in earnings of unconsolidated joint ventures	(509)	(601)	(909)	(1,013)
Operating Segments | Real estate - commercial/industrial
Revenues:
Total revenues	2,189	2,083	4,343	4,272
Costs and Expenses:
Total expenses	1,388	1,902	2,707	3,645
Operating Segments | Mineral resources
Revenues:
Total revenues	1,500	1,519	10,631	3,520
Costs and Expenses:
Total expenses	595	529	4,826	1,853
Operating Segments | Farming
Revenues:
Total revenues	542	1,501	1,737	1,932
Costs and Expenses:
Total expenses	1,191	1,258	3,029	2,581
Operating Segments | Ranch operations
Revenues:
Total revenues	839	860	1,828	1,941
Costs and Expenses:
Total expenses	1,348	1,461	2,737	2,954
Corporate expenses
Costs and Expenses:
Total expenses	$ 2,464	$ 2,368	$ 5,196	$ 5,119