Interest and other income/ (expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest (expense)/income	$ (23)	$ 11	$ (23)	$ 32
Other (expense)/income	0	0	(2)	0
Total	$ (23)	$ 11	$ (25)	$ 32