Income Tax (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 639	$ 562	$ 774	$ 744
Net loss before income tax	(7,332)	$ (7,929)	(12,070)	$ (17,099)
Unrecognized tax benefits	6,000		6,000		$ 5,500
Unrecognized tax benefits that would impact effective tax rate	5,100		5,100
Effect on income tax expense net of valuation allowance	$ 600		$ 600