Reporting Segments and Related Information - Revenue Components of Farming Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from External Customer [Line Items]
Net operating income (loss)	$ (2,013)	$ (2,235)	$ (199)	$ (5,708)
Farming Segment
Revenue from External Customer [Line Items]
Commercial/industrial revenues	542	1,501	1,737	1,932
Net operating income (loss)	(649)	243	(1,292)	(650)
Farming Segment | Almonds
Revenue from External Customer [Line Items]
Commercial/industrial revenues	250	790	1,174	790
Farming Segment | Pistachios
Revenue from External Customer [Line Items]
Commercial/industrial revenues	41	312	84	568
Farming Segment | Other
Revenue from External Customer [Line Items]
Commercial/industrial revenues	$ 251	$ 399	$ 479	$ 574