Income Taxes (Components of Provision for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current provision (benefit):
Federal	$ 0	$ 0	$ 3
State	5	7	7
Foreign	(45)	178	82
Total current provision	(40)	185	92
Deferred provision (benefit):
Federal	(59)	(62)	0
State	(7)	(7)	0
Foreign	19	154	149
Total deferred provision	(47)	85	149
Total provision for (benefit from) income taxes	$ (87)	$ 270	$ 241