Summary of Significant Accounting Policies - Variable Interest Entity (Details) (Variable Interest Entity, Primary Beneficiary [Member], USD $)	3 Months Ended		6 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 31, 2014 Subsequent Event [Member]
Variable Interest Entity [Line Items]
Variable interest entity, consolidated assets	$ 300,000		$ 300,000
Variable interest entity, expense	$ 17,000	$ 0	$ 32,000	$ 0
Variable interest entity, ownership percentage					100.00%