Long-Term Debt (Schedule of Long-term Debt) (Details) In Thousands, unless otherwise specified	Jun. 30, 2012 USD ($)	Jun. 30, 2012 CAD	Dec. 31, 2011 USD ($)	Jun. 30, 2012 BMO Credit Agreement [Member] USD ($)	Dec. 31, 2011 BMO Credit Agreement [Member] USD ($)	Jun. 30, 2012 Edmonton Mortgage [Member] USD ($)	Dec. 31, 2011 Edmonton Mortgage [Member] USD ($)
Debt Instrument [Line Items]
Long-term Debt, Total	$ 3,631	3,700	$ 9,100	$ 3,631	$ 0	$ 0	$ 9,100
Less: current maturities of long-term debt obligations	(333)		(9,100)
Long-term debt, less current portion	$ 3,298		$ 0