Segments (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Revenue for each segment recognized based on customer location
Long-lived assets	$ 6,466	$ 5,300
Total assets	110,319	97,833
North America
Revenue for each segment recognized based on customer location
Long-lived assets	4,550	3,389
Total assets	103,873	92,139
Europe
Revenue for each segment recognized based on customer location
Long-lived assets	1,916	1,911
Total assets	37,429	36,595
Elimination
Revenue for each segment recognized based on customer location
Long-lived assets	0	0
Total assets	$ (30,983)	$ (30,901)