Business Segment Data - Summary of Operations in Different Segments (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 4,971,925	$ 4,429,302	$ 9,960,053	$ 8,990,477
Operating Income (Loss)	950,260	864,159	1,678,130	1,742,522
Depreciation and Amortization	714,199	520,035	1,430,908	1,022,489
Capital Expenditures	48,477	6,918,144	27,941,955	6,927,626
Identifiable Assets	201,016,878		201,016,878		184,696,900
Income Properties [Member]
Segment Reporting Information [Line Items]
Revenues	3,325,616	2,238,516	6,413,034	4,361,777
Operating Income (Loss)	2,943,544	2,063,726	5,801,453	4,042,583
Depreciation and Amortization	657,544	461,622	1,315,064	878,287
Capital Expenditures	4,498	6,890,120	27,810,674	6,890,120
Identifiable Assets	146,909,609		146,909,609		130,726,326
Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Revenues	302,977	929,717	641,325	1,995,384
Operating Income (Loss)	118,714	705,760	335,584	1,606,609
Depreciation and Amortization
Capital Expenditures
Identifiable Assets	32,781,686		32,781,686		34,161,944
Golf Operations [Member]
Segment Reporting Information [Line Items]
Revenues	1,312,826	1,253,079	2,777,511	2,582,658
Operating Income (Loss)	(112,546)	(182,227)	(55,490)	(313,578)
Depreciation and Amortization	50,318	34,293	99,993	87,207
Capital Expenditures	19,697		85,820
Identifiable Assets	3,042,257		3,042,257		3,230,225
Agriculture and Other [Member]
Segment Reporting Information [Line Items]
Revenues	30,506	7,990	128,183	50,658
Operating Income (Loss)	(24,579)	(58,342)	41,729	(87,232)
Depreciation and Amortization	6,337	24,120	15,851	56,995
Capital Expenditures	24,282	28,024	45,461	37,506
Identifiable Assets	18,283,326		18,283,326		16,578,405
General and Corporate Expense [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ (1,974,873)	$ (1,664,758)	$ (4,445,146)	$ (3,505,860)