Organization and Significant Accounting Policies - Inventory and income taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Deferred Financing Fees
Financing fees capitalized	$ 413,000
Accumulated amortization of deferred financing fees	300,000	$ 700,000
Deferred offering costs incurred	78,543	0
Inventory
Cost of harvested crop included in property operating expenses	200,000	$ 100,000
Harvested crop	198,000		$ 283,000
Total inventory	$ 198,000		$ 283,000