Nil Coupon Non-Redeemable Convertible Unsecured Loan Notes (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Principal Amount	$ 76	$ 76
Number of Equity Instruments (in shares)	6,715
Share Price (in dollars per share)	$ 7.09
Carrying Amount of Equity Component	$ 48
Minimum
Debt Instrument [Line Items]
Conversion Price	$ 6.50
Maximum
Debt Instrument [Line Items]
Conversion Price	$ 11.43

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Paragraph 4

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details