The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

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-Name Accounting Standards Codification

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

Indebtedness (Notes Payable) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		3 Months Ended
	May 31, 2011 Lilly Loan [Member]	Jun. 30, 2012 Lilly Loan [Member]	Oct. 31, 2008 Lilly Loan [Member]	Jun. 30, 2012 Lilly Loan Amendment [Member]	Dec. 31, 2011 Lilly Loan Amendment [Member]
Debt Instrument [Line Items]
Borrowing capacity under letter of credit facility			$ 165.0
Amount withdrawn from loan agreement facility	165
Debt Instrument, Interest Rate, Stated Percentage		5.51%		5.51%
Debt instrument maturity date		May 23, 2014		Jun. 30, 2016
Unamortized discount on debt instrument				$ 8.9	$ 9.9