Segment Reporting and Geographic Information Customer Reporting (Details)	6 Months Ended
	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	18.40%	8.60%
Major Customers Two [Domain]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.50%	0.70%
Major Customer Three [Domain]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	7.50%	13.10%
Major Customer Four [Domain]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	7.10%	13.60%