The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Income Tax (Details Textual)									12 Months Ended
Income Tax (Details Textual)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2009 EUR (€)	Dec. 31, 2007 USD ($)	Dec. 31, 2007 EUR (€)	Dec. 31, 2011 UNITED KINGDOM [Member] USD ($)	Dec. 31, 2011 SPAIN [Member] USD ($)	Dec. 31, 2011 SPAIN [Member] EUR (€)	Dec. 31, 2011 LUXEMBOURG [Member] USD ($)	Dec. 31, 2011 LUXEMBOURG [Member] EUR (€)
Income Tax (Textual) [Abstract]
Taxation loss carryforwards	$ 35,554,000		$ 38,914,000					$ 26,800,000	$ 82,400,000	€ 63,600,000	$ 92,300,000	€ 71,200,000
Maximum Period of tax losses of Spain to be carried forward for offset against future taxable income									15 years	15 years
Additional Income Tax (Textual) [Abstract]
Unrecognized Tax Benefits						5,400,000	3,400,000
Recognized Tax liability	5,500,000	4,200,000		4,700,000	3,400,000
Accrued interest and penalties	$ 300,000		$ 1,000,000	$ 500,000