Summary of Significant Accounting Policies - Reclassification Adjustments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue, Major Customer [Line Items]
Segment revenues		$ 45,577,000	$ 51,147,000	$ 51,069,000
Segment losses		53,483,000	54,343,000	49,126,000
Modified share-based awards	$ 1,065,000	0	1,065,000
Ranch operations
Revenue, Major Customer [Line Items]
Segment revenues			3,923,000	3,534,000
Segment losses		$ 5,734,000	$ 6,112,000	$ 5,998,000