Segmented Information (Details 1) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Geographical Information
Geographical Information, Domestic	$ 36,240	$ 38,087	$ 61,720	$ 93,882
Total	57,232	55,598	102,392	128,381
Canada [Member]
Geographical Information
Geographical Information, foreign	4,626	874	5,627	2,771
Russia and the CIS [Member]
Geographical Information
Geographical Information, foreign	5,086	1,987	9,003	3,626
Western Europe [Member]
Geographical Information
Geographical Information, foreign	4,193	3,245	6,475	7,937
Rest of Europe [Member]
Geographical Information
Geographical Information, foreign	317	230	2,641	562
Asia excluding greater China [Member]
Geographical Information
Geographical Information, foreign	3,554	6,142	5,873	8,655
Greater China [Member]
Geographical Information
Geographical Information, foreign	1,890	1,112	8,662	4,434
Mexico [Member]
Geographical Information
Geographical Information, foreign	302	475	658	1,735
Rest of the world [Member]
Geographical Information
Geographical Information, foreign	$ 1,024	$ 3,446	$ 1,733	$ 4,779