Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Total revenues	$ 45,619	$ 35,255	$ 45,979
Costs and Expenses:
Total expenses	45,183	42,773	52,744
Operating income (loss)	436	(7,518)	(6,765)
Other Income:
Gain on sale of real estate	0	0	1,044
Investment income	1,344	462	457
Other loss	(59)	(275)	(581)
Total other income	1,285	187	920
Income (loss) from operations before equity in earnings of unconsolidated joint ventures	1,721	(7,331)	(5,845)
Equity in earnings of unconsolidated joint ventures, net	3,834	4,227	7,098
Income (loss) before income taxes	5,555	(3,104)	1,253
Income tax expense (benefit)	1,320	(1,283)	496
Net income (loss)	4,235	(1,821)	757
Net loss attributable to non-controlling interest	(20)	(24)	(43)
Net income (loss) attributable to common stockholders	$ 4,255	$ (1,797)	$ 800
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ 0.16	$ (0.08)	$ 0.04
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.16	$ (0.08)	$ 0.04
Real estate - commercial/industrial
Revenues:
Total revenues	$ 8,970	$ 9,001	$ 9,840
Real estate - resort/residential
Costs and Expenses:
Total expenses	1,530	1,955	1,630
Mineral resources
Revenues:
Total revenues	14,395	5,983	14,153
Ranch operations
Revenues:
Total revenues	3,691	3,837	3,338
Costs and Expenses:
Total expenses	5,451	5,411	5,734
Operating Segments
Revenues:
Total revenues	45,619	35,255	45,979
Costs and Expenses:
Operating income (loss)	10,141	2,195	5,046
Operating Segments | Real estate - commercial/industrial
Revenues:
Total revenues	8,970	9,001	9,840
Costs and Expenses:
Total expenses	6,246	6,529	7,100
Operating income (loss)	2,724	2,472	2,740
Operating Segments | Real estate - resort/residential
Costs and Expenses:
Operating income (loss)	(1,530)	(1,955)	(1,630)
Operating Segments | Mineral resources
Revenues:
Total revenues	14,395	5,983	14,153
Costs and Expenses:
Total expenses	6,223	2,964	7,796
Operating income (loss)	8,172	3,019	6,357
Operating Segments | Farming
Revenues:
Total revenues	18,563	16,434	18,648
Costs and Expenses:
Total expenses	16,028	16,201	18,673
Operating income (loss)	2,535	233	(25)
Operating Segments | Ranch operations
Revenues:
Total revenues	3,691	3,837	3,338
Costs and Expenses:
Operating income (loss)	(1,760)	(1,574)	(2,396)
Corporate
Costs and Expenses:
Total expenses	$ 9,705	$ 9,713	$ 11,811