Commitments and Contingencies (Narrative) (Details) $ in Thousands	1 Months Ended		6 Months Ended
	Feb. 28, 2015 USD ($) ft²	Jan. 31, 2015 USD ($) ft² option	Jun. 30, 2015 USD ($) ft²
Property Subject to or Available for Operating Lease [Line Items]
Office Space | ft²			3,713
Approximate total lease payments			$ 300
Twenty-five Month Sublease Agreement, Expiring March 31, 2017 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease agreement period		25 months
Area of space, in sqft | ft²		4,047
Total lease payments through the end of the lease		$ 93
Number of options to extend lease | option		2
Lease extension period		6 months
Thirty-two Month Sublease Agreement, Expiring October 31, 2017 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease agreement period	32 months
Area of space, in sqft | ft²	18,599
Total lease payments through the end of the lease	$ 1,466