Conversion of Stock Conversion Payment

No definition available.

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- Definition

Debt Instrument, Convertible, Conversion Ratio Denominator

+ References

No definition available.

+ Details

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- Definition

Debt Instrument Convertible Number Of Shares Issuable Upon Conversion

+ References

No definition available.

+ Details

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

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-Subparagraph (a)

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

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-Subparagraph (a)

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- Definition

Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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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.

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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.

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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.

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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.

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- Definition

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

+ Details

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- Definition

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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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.

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Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		3 Months Ended		3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Level 2	Mar. 31, 2013 Embedded derivative financial instruments	Jan. 24, 2013 Embedded derivative financial instruments Early Conversion Payment	Mar. 31, 2013 Fair Value, Measurements, Recurring	Mar. 31, 2012 Fair Value, Measurements, Recurring	Mar. 31, 2013 Fair Value, Measurements, Recurring Level 2	Mar. 31, 2013 Fair Value, Measurements, Nonrecurring	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, fair value disclosure								$ 0	$ 0
Liabilities, fair value disclosure					4,642,000			0	0
Fair value of available-for-sale securities with unrealized losses					0	0
Conversion price of per principal amount				83.33
Principal amount of convertible notes, denominator				1,000
Conversion rate of convertible note into shares of common stock			121.1240
Conversion price of per share			$ 8.26
Increase in estimated fair value of embedded derivative issue represents unrealized loss	737,000		737,000
Estimated fair value Notes		$ 128,800,000