Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Convertible Security

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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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- Definition

The fair value of notes issued in noncash investing and financing activities.

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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Convertible Note Payable - Additional Information (Detail) (USD $)	1 Months Ended
	Oct. 31, 2012	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Conversion date	Oct. 09, 2015
Conversion price per shares		$ 4.00
Convertible note payable, at fair value		$ 10,665,000	$ 11,279,000
Convertible Debt \| GSK
Debt Instrument [Line Items]
Convertible notes issued	$ 5,400,000