Note 13 - Segment and Geographical Information (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

Revenues:	For the years ended December 31,
		2009		2010		2011
		(in thousands)
United States	$	49,634	$	147,918	$	298,056
Canada		—		9,710		21,271
United Kingdom		—		5,883		78,533
Total	$	49,634	$	163,511	$	397,860

Disclosure on Geographic Areas, Long-Lived Assets

Long-lived assets: (1)	December 31,
		2010		2011
		(in thousands)
United States	$	126,772	$	340,955
Canada		24,028		42,377
United Kingdom		7,616		72,452
Total	$	158,416	$	455,784