Carrying value as of the balance sheet date of the portion of long-term debt due within one year or the operating cycle if longer identified as Convertible Notes Payable. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

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

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Amount of interest payable on debt, including, but not limited to, trade payables.

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-Topic 942

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The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

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Number of tranches.

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Convertible Notes Payable - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended
	Feb. 28, 2011	Dec. 31, 2014	Dec. 31, 2010 Tranche	Jan. 31, 2013	Oct. 31, 2012
Debt Instrument [Line Items]
Maturity date		Feb. 28, 2011
Amount of debt converted into shares	$ 4,600,000
Series B convertible preferred stock [Member]
Debt Instrument [Line Items]
Number of shares issued in exchange for Notes payable	10,238,444
2010 Notes [Member]
Debt Instrument [Line Items]
Convertible notes payable, current			4,500,000
Number of tranches			2
Fixed interest rate			5.00%
2012 Notes [Member]
Debt Instrument [Line Items]
Convertible notes payable, current					4,500,000
Fixed interest rate					8.00%
Maturity date		Jan. 31, 2013
Accrued interest				$ 88,000
2012 Notes [Member] \| Series B convertible preferred stock [Member]
Debt Instrument [Line Items]
Number of shares issued in exchange for Notes payable				10,195,552
Price per share				$ 0.45	$ 0.45