Commitments and Contingencies - Future Minimum Rental Payments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
2015	$ 393,000		$ 393,000
2016	785,000		785,000
2017	785,000		785,000
2018	785,000		785,000
2019	785,000		785,000
2020 through 2034	8,013,000		8,013,000
Total	11,546,000		11,546,000
Other Expenses [Abstract]
Operating ground lease expense	$ 156,000	$ 91,000	$ 312,000	$ 175,000