Note 13 - Segment and Geographical Information (Tables)

6 Months Ended

Jun. 30, 2012

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

	For the three months ended June 30,				For the six months ended June 30,
	2011		2012		2011		2012
Revenues:
United States	$	82,685	$	88,463	$	139,543	$	175,657
Canada		5,597		7,018		10,297		13,904
United Kingdom		18,460		32,296		23,490		61,954
Total	$	106,742	$	127,777	$	173,330	$	251,515

Disclosure on Geographic Areas, Long-Lived Assets

	December 31, 2011		June 30, 2012
Long-lived assets: (1)
United States	$	340,955	$	329,191
Canada		42,377		36,970
United Kingdom		72,452		70,944
Total	$	455,784	$	437,105