Geographical Information (Schedule of Geographical Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013
Revenues from External Customers [Line Items]
Revenues	$ 21,064	$ 21,995	$ 41,957	$ 44,546
Number of material operating segments			1
Canada [Member]
Revenues from External Customers [Line Items]
Revenues	11,968	12,336	22,542	26,632
United States [Member]
Revenues from External Customers [Line Items]
Revenues	9,088	8,841	19,407	16,239
Others
Revenues from External Customers [Line Items]
Revenues	$ 8	$ 818	$ 8	$ 1,675