Income Tax Expense (Income and Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Loss before Income Tax Benefit [Abstract]
U.S.	$ (22,270)	$ (26,062)	$ (4,384)
Foreign	(12,973)	(2,754)	0
Net income (loss) before income tax	(35,243)	(28,816)	(4,384)
Current:
Federal	30	(148)	49
State	176	27	20
Foreign	319	35	0
Total	525	(86)	69
Deferred:
Federal	0	0	(13,634)
State	0	0	(1,472)
Deferred Foreign Income Tax Expense (Benefit)	6	0	0
Income tax expense (benefit)	$ 531	$ (86)	$ (15,037)