Commitments and Contingencies - Future Minimum Rental Payments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
2016 (remaining)	$ 294,000		$ 294,000
2017	1,429,000		1,429,000
2018	1,685,000		1,685,000
2019	1,685,000		1,685,000
2020	1,685,000		1,685,000
2021 and thereafter	36,253,000		36,253,000
Total	43,031,000		43,031,000
Other Expenses [Abstract]
Operating ground lease expense	$ 241,000	$ 224,000	$ 734,000	$ 536,000