Reporting Segments and Related Information - Revenue Components of Farming Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Total expenses	$ 7,558	$ 10,341	$ 19,634	$ 22,035
Operating results	(1,311)	(1,044)	(2,838)	(1,701)
Farming
Revenue from External Customer [Line Items]
Total revenues	209	886	1,161	1,701
Total expenses	1,099	825	2,801	2,423
Operating results	$ (890)	$ 61	$ (1,640)	$ (722)