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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Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. 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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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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.

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

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Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Section 55

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair Value of Financial Instruments (Details 3) (USD $)	3 Months Ended
Fair Value of Financial Instruments (Details 3) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Warrant and Interest Make-Whole Liability
Reduction due to conversion of debt to equity	$ 21,176,000	$ 10,418,000
Note Liability
Carrying value of the convertible notes	11,708,000us-gaap_ConvertibleLongTermNotesPayable		26,947,000us-gaap_ConvertibleLongTermNotesPayable
Amount issued	14,700,000us-gaap_DebtInstrumentFaceAmount
Estimated fair value of the convertible notes	35,800,000
Significant Unobservable Inputs (Level 3) \| Derivative Financial Instruments, Liabilities
Warrant and Interest Make-Whole Liability
Balance at the beginning of the period	6,564,000
Changes in fair value of derivative liabilities included in earnings	49,000
Reduction due to conversion of debt to equity	(3,922,000)
Balance at the end of the period	$ 2,691,000