Basis of Presentation	6 Months Ended
Jun. 30, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting [Text Block]	Note A. Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP") for interim financial information. Accordingly, they do not include all of the information and footnotes required by US GAAP for annual financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the six-month period ended June 30, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012. The balance sheet as at December 31, 2011 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by US GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company's annual report on Form 20-F for the year ended December 31, 2011.

Basis of Presentation

6 Months Ended

Jun. 30, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note A. Basis of presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP") for interim financial information. Accordingly, they do not include all of the information and footnotes required by US GAAP for annual financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the six-month period ended June 30, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012.

The balance sheet as at December 31, 2011 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by US GAAP for complete financial statements.

For further information, refer to the consolidated financial statements and footnotes thereto included in the Company's annual report on Form 20-F for the year ended December 31, 2011.