Segment Reporting (Details) Segment Information by Major Operating Segment - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total revenues (losses)	$ 266,663	$ 192,488	$ 160,181
Interest		228	1,135
Impairment loss on intangible and long-lived assets	$ 3,282	13,084	1,410
Depreciation and amortization	2,212	3,054	2,618
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate	(31,150)	(46,969)	(2,167)
Equity in loss of unconsolidated affiliate	(3,422)	(2,076)	(565)
Total assets	663,609	804,444	762,552
Capital expenditure	3,108	5,270	3,568
Water Resources and Water Storage Operations
Segment Reporting Information [Line Items]
Total revenues (losses)	4,332	1,580	25,862
Interest		18	206
Impairment loss on intangible and long-lived assets	269	5,791	993
Depreciation and amortization	1,037	1,098	1,197
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate	(3,858)	(12,584)	(867)
Total assets	185,037	186,294	193,105
Capital expenditure	76	230	271
Real Estate Operations
Segment Reporting Information [Line Items]
Total revenues (losses)	279,196	$ 191,440	$ 93,272
Interest
Impairment loss on intangible and long-lived assets	1,197	$ 2,865	$ 417
Depreciation and amortization	552	669	271
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate	6,394	(10,531)	(4,442)
Total assets	422,935	384,855	276,954
Capital expenditure	330	1,004	650
Corporate
Segment Reporting Information [Line Items]
Total revenues (losses)	(16,865)	(532)	27,398
Interest		210	629
Impairment loss on intangible and long-lived assets	1,816	4,428
Depreciation and amortization	623	1,287	1,086
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate	(33,686)	(23,854)	8,423
Equity in loss of unconsolidated affiliate	(3,422)	(2,076)	(565)
Total assets	46,844	80,741	137,488
Capital expenditure	$ 2,702	$ 4,036	$ 2,647
Discontinued Agribusiness Operations
Segment Reporting Information [Line Items]
Total revenues (losses)
Interest
Depreciation and amortization
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate
Total assets	$ 8,793	$ 152,554	$ 155,005
Capital expenditure
Enterprise Software
Segment Reporting Information [Line Items]
Total revenues (losses)			$ 13,649
Interest			300
Depreciation and amortization			64
Loss from continuing operations before income taxes and equity in loss of unconsolidated affiliate			$ (5,281)