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Fair Value (Details 3) (Scottish Enterprise Agreement) | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2009 tranche | Dec. 31, 2012 USD ($) | Dec. 31, 2012 GBP (£) | Dec. 31, 2011 USD ($) | Dec. 31, 2011 GBP (£) | Jan. 06, 2010 USD ($) | Jan. 06, 2010 GBP (£) | Dec. 31, 2009 USD ($) | Jul. 02, 2009 USD ($) | Jul. 02, 2009 GBP (£) | Jun. 22, 2009 USD ($) | Jun. 22, 2009 GBP (£)
Scottish Enterprise Agreement |  |  |  |  |  |  |  |  |  |  |  |
Maximum guaranteed amount potentially due to SE |  | $ 6,500,000 |  | $ 6,200,000 | £ 4,000,000 |  |  | $ 8,000,000 |  |  |  | £ 5,000,000
Modified payment for which parties agreed |  |  |  |  |  |  |  |  |  |  | 1,700,000 | 1,000,000
Number of tranches in which modified payment will be paid | 2 |  |  |  |  |  |  |  |  |  |  |
Amount paid |  |  |  |  | 4,000,000 | 800,000 | 500,000 |  | 800,000 | 500,000 |  |
Potential amount to be paid if staffing levels reduced below the prescribed levels |  | 6,100,000 | 3,800,000 | 5,900,000 | 3,800,000 |  |  |  |  |  |  |
Fair value of the liability |  | $ 20,000 |  | $ 20,000 |  |  |  |  |  |  |  |
Expected volatility (as a percent) |  | 30.00% | 30.00% | 30.00% | 30.00% |  |  |  |  |  |  |
Probability of falling below a minimum staffing level within prescribed time period (as a percent) |  | 1.00% | 1.00% | 1.00% | 1.00% |  |  |  |  |  |  |

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- Definition Represents the probability assumption of falling staffing level below minimum prescribed levels within prescribed time period used in valuing an instrument. + References No definition available. + Details
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- Definition Represents the amount paid by the entity under the guarantee or each group of similar guarantees. + References No definition available. + Details
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- Definition Represents the modified payment that will be paid by the entity for which the parties agreed. + References No definition available. + Details
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- Definition Represents the potential amount to be paid, if staffing levels reduced below the prescribed levels. + References No definition available. + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of contractual guarantees to which the Company is obligated as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 3, 8, 15 -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. + Details
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