Marketable securities	12 Months Ended
Marketable securities	Dec. 31, 2011
Marketable securities [Abstract]
Marketable securities	6. Marketable securities The Company held $18.1 million of marketable securities at December 31, 2011. The Company has classified these investments as available for sale. These investments are comprised of federally insured certificates of deposit and these three accounts detailed as follows: $5.1 million with a maturity date of January 12, 2012, $6.0 million with a maturity date of March 29, 2012, and $7.0 million with a maturity date of October 4, 2012. As at December 31, 2010, the Company held $20.6 million of marketable securities.

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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