Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Total revenues	$ 37,830	$ 49,523	$ 45,619
Costs and expenses:
Total expenses	44,577	50,954	45,183
Operating (loss) income	(6,747)	(1,431)	436
Other income (loss):
Investment income	884	1,239	1,344
Gain on sale of real estate	1,331	0	0
Other income (loss)	110	(1,824)	(59)
Total other income (loss)	2,325	(585)	1,285
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(4,422)	(2,016)	1,721
Equity in earnings of unconsolidated joint ventures, net	4,504	16,575	3,834
Income before income taxes	82	14,559	5,555
Income tax expense	829	3,980	1,320
Net (loss) income	(747)	10,579	4,235
Net loss attributable to non-controlling interest	(7)	(1)	(20)
Net (loss) income attributable to common stockholders	$ (740)	$ 10,580	$ 4,255
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ (0.03)	$ 0.41	$ 0.16
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ (0.03)	$ 0.40	$ 0.16
Real estate - commercial/industrial
Revenues:
Total revenues	$ 9,536	$ 16,792	$ 8,970
Costs and expenses:
Total expenses	7,122	12,961	6,246
Operating (loss) income	2,414	3,831	2,724
Other income (loss):
Equity in earnings of unconsolidated joint ventures, net	4,504	16,575	3,834
Income before income taxes	6,918	20,406	6,558
Real estate - resort/residential
Costs and expenses:
Total expenses	1,612	2,247	1,530
Operating (loss) income	(1,612)	(2,247)	(1,530)
Mineral resources
Revenues:
Total revenues	10,736	9,791	14,395
Costs and expenses:
Total expenses	6,414	5,818	6,223
Operating (loss) income	4,322	3,973	8,172
Other income (loss):
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	4,322	3,973	8,172
Farming
Revenues:
Total revenues	13,866	19,331	18,563
Costs and expenses:
Total expenses	15,103	15,251	16,028
Operating (loss) income	(1,237)	4,080	2,535
Other income (loss):
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(1,237)	4,080	2,535
Ranch operations
Revenues:
Total revenues	3,692	3,609	3,691
Costs and expenses:
Total expenses	4,896	5,316	5,451
Operating (loss) income	(1,204)	(1,707)	(1,760)
Other income (loss):
(Loss) income from operations before equity in earnings of unconsolidated joint ventures	(1,204)	(1,707)	(1,760)
Corporate expenses
Costs and expenses:
Total expenses	$ 9,430	$ 9,361	$ 9,705