Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 49,523	$ 45,619	$ 35,255
Costs and expenses:
Total expenses	50,954	45,183	42,773
Operating (loss) income	(1,431)	436	(7,518)
Other (loss) income:
Investment income	1,239	1,344	462
Other loss	(1,824)	(59)	(275)
Total other (loss) income	(585)	1,285	187
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(2,016)	1,721	(7,331)
Equity in earnings of unconsolidated joint ventures, net	16,575	3,834	4,227
Income (loss) before income taxes	14,559	5,555	(3,104)
Income tax expense (benefit)	3,980	1,320	(1,283)
Net income (loss)	10,579	4,235	(1,821)
Net loss attributable to non-controlling interest	(1)	(20)	(24)
Net income (loss) attributable to common stockholders	$ 10,580	$ 4,255	$ (1,797)
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ 0.41	$ 0.16	$ (0.08)
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.40	$ 0.16	$ (0.08)
Real estate - commercial/industrial
Revenues:
Total revenues	$ 16,792	$ 8,970	$ 9,001
Costs and expenses:
Total expenses	12,961	6,246	6,529
Other (loss) income:
Equity in earnings of unconsolidated joint ventures, net	16,575	3,834	4,227
Income (loss) before income taxes	20,406	6,558	6,699
Real estate - resort/residential
Costs and expenses:
Total expenses	2,247	1,530	1,955
Mineral resources
Revenues:
Total revenues	9,791	14,395	5,983
Costs and expenses:
Total expenses	5,818	6,223	2,964
Other (loss) income:
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	3,973	8,172	3,019
Farming
Revenues:
Total revenues	19,331	18,563	16,434
Costs and expenses:
Total expenses	15,251	16,028	16,201
Other (loss) income:
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	4,080	2,535	233
Ranch operations
Revenues:
Total revenues	3,609	3,691	3,837
Costs and expenses:
Total expenses	5,316	5,451	5,411
Other (loss) income:
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(1,707)	(1,760)	(1,574)
Operating Segments
Revenues:
Total revenues	49,523	45,619	35,255
Costs and expenses:
Operating (loss) income	7,930	10,141	2,195
Operating Segments | Real estate - commercial/industrial
Revenues:
Total revenues	16,792	8,970	9,001
Costs and expenses:
Total expenses			6,529
Operating (loss) income	3,831	2,724	2,472
Operating Segments | Real estate - resort/residential
Costs and expenses:
Operating (loss) income	(2,247)	(1,530)	(1,955)
Operating Segments | Mineral resources
Revenues:
Total revenues	9,791	14,395	5,983
Costs and expenses:
Total expenses			2,964
Operating (loss) income	3,973	8,172	3,019
Operating Segments | Farming
Revenues:
Total revenues	19,331	18,563	16,434
Costs and expenses:
Total expenses			16,201
Operating (loss) income	4,080	2,535	233
Operating Segments | Ranch operations
Revenues:
Total revenues	3,609	3,691	3,837
Costs and expenses:
Operating (loss) income	(1,707)	(1,760)	(1,574)
Corporate
Costs and expenses:
Total expenses	$ 9,361	$ 9,705	$ 9,713