Income Taxes (Components of the Provision(Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal									$ 0	$ 0	$ 0
State									37	(100)	54
Foreign									964	932	163
Total Current									1,001	832	217
Deferred
Federal									727	293	300
State									131	31	10
Foreign									(329)	(117)	(605)
Total Deferred									529	207	(295)
Provision (benefit) for income taxes	$ 961	$ 308	$ 158	$ 103	$ 854	$ 190	$ 238	$ (243)	$ 1,530	$ 1,039	$ (78)