Segment and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Total revenues summarized by geographic area
Total Revenues	$ 25,037	$ 23,457	$ 43,797	$ 55,771
United States [Member]
Total revenues summarized by geographic area
Total Revenues	20,390	21,057	37,503	49,246
United Kingdom & Other [Member]
Total revenues summarized by geographic area
Total Revenues	$ 4,647	$ 2,400	$ 6,294	$ 6,525