Notes Receivable (Narrative) (Details)			12 Months Ended
	May 13, 2016 USD ($) a	Oct. 06, 2015 USD ($) a	Dec. 31, 2016 USD ($) item
Notes Receivable[Abstract]
Number of acres sold | a	24	6
Land Sales	$ 4,300,000	$ 1,459,000
Promissory note			$ 3,191,166
Number of promissory notes | item			2
Promissory notes interest			1.43%
Annual payments due on promissory notes			$ 1,094,000
Receivable, maturity date			May 01, 2019