Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Total revenues	$ 45,577,000	$ 51,147,000	$ 51,069,000
Costs and Expenses:
Total expenses	53,483,000	54,343,000	49,126,000
Operating (loss) income	(7,906,000)	(3,196,000)	1,943,000
Other Income:
Gain on sale of real estate	1,044,000	0	0
Investment income	457,000	528,000	696,000
Other income	158,000	381,000	526,000
Total other income	1,659,000	909,000	1,222,000
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(6,247,000)	(2,287,000)	3,165,000
Equity in earnings of unconsolidated joint ventures, net	7,098,000	6,324,000	5,294,000
Income before income tax expense	851,000	4,037,000	8,459,000
Income tax expense	336,000	1,125,000	2,697,000
Net income	515,000	2,912,000	5,762,000
Net (loss) income attributable to non-controlling interest	(43,000)	(38,000)	107,000
Net income attributable to common stockholders	$ 558,000	$ 2,950,000	$ 5,655,000
Net Income (loss) Per Share	$ 0.03	$ 0.14	$ 0.27
Net income per share attributable to common stockholders, diluted (in dollars per share(	$ 0.03	$ 0.14	$ 0.27
Ranch operations
Revenues:
Total revenues		$ 3,923,000	$ 3,534,000
Costs and Expenses:
Total expenses	$ 5,734,000	6,112,000	5,998,000
Operating Segments | Real estate - commercial/industrial
Revenues:
Total revenues	9,438,000	8,272,000	7,845,000
Costs and Expenses:
Total expenses	7,100,000	6,694,000	7,206,000
Operating (loss) income	2,338,000	1,578,000	639,000
Other Income:
Equity in earnings of unconsolidated joint ventures, net	7,098,000	6,324,000	5,294,000
Operating Segments | Mineral resources
Revenues:
Total revenues	14,153,000	15,116,000	16,255,000
Costs and Expenses:
Total expenses	7,796,000	7,396,000	6,418,000
Operating (loss) income	6,357,000	7,720,000	9,837,000
Operating Segments | Real estate - resort/residential
Costs and Expenses:
Total expenses	1,630,000	2,349,000	2,608,000
Operating (loss) income	(1,630,000)	(2,349,000)	(2,608,000)
Operating Segments | Farming
Revenues:
Total revenues	18,648,000	23,836,000	23,435,000
Costs and Expenses:
Total expenses	18,673,000	18,984,000	16,250,000
Operating (loss) income	(25,000)	4,852,000	7,185,000
Operating Segments | Ranch operations
Revenues:
Total revenues	3,338,000	3,923,000	3,534,000
Costs and Expenses:
Operating (loss) income	(2,396,000)	(2,189,000)	(2,464,000)
Corporate
Costs and Expenses:
Total expenses	$ 12,550,000	$ 12,808,000	$ 10,646,000