Number of the required periodic payments applied to principal.

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- Definition

Represents the prepayment premium of a debt instrument as a percentage of outstanding principal.

+ References

No definition available.

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- Definition

Percentage points adjustment to the variable rate of the debt instrument.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Publisher FASB

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-Subparagraph (SX 210.5-02.19(b),22(b))

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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-Name Accounting Standards Codification

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Loan and Security Agreements (Details)	1 Months Ended		9 Months Ended	12 Months Ended
Loan and Security Agreements (Details)	Feb. 28, 2015 USD ($) $ / shares shares	Dec. 31, 2012 USD ($)	Sep. 30, 2015 USD ($) installment	Dec. 31, 2014 USD ($) installment
Loan and Security Agreements
Repayment of existing debt			$ 15,784,150
Value of warrants			1,184,228
Loss on extinguishment of debt			1,035,981
Secured debt \| Oxford Loan
Loan and Security Agreements
Loss on extinguishment of debt			$ 1,000,000
Secured debt \| Oxford Loan
Loan and Security Agreements
Amount borrowed		$ 15,000,000
Repayment of existing debt	$ 15,500,000
Fixed interest rate (as a percent)				9.20%
Number of consecutive monthly principal installments \| installment				30
Final payment				$ 675,000
Secured debt \| Hercules Loan
Loan and Security Agreements
Maximum borrowing capacity	25,000,000
Amount borrowed	16,500,000
Additional amount available	$ 8,500,000
Number of consecutive monthly principal installments \| installment			30
Final payment			$ 610,500
Secured debt \| Hercules Loan \| Minimum
Loan and Security Agreements
Fixed interest rate (as a percent)			9.00%
Secured debt \| Hercules Loan \| Hercules
Loan and Security Agreements
Number of warrants (in shares) \| shares	180,274
Exercise price of warrants (in dollars per share) \| $ / shares	$ 5.89
Value of warrants	$ 1,200,000
Secured debt \| Hercules Loan \| Equity financings \| Hercules \| Right to participate in future equity financings \| Maximum
Loan and Security Agreements
Equity financings amount	$ 2,000,000
Secured debt \| LIBOR \| Oxford Loan
Loan and Security Agreements
Variable rate basis				three-month U.S. Libor rate
Variable interest rate margin (as a percent)				8.73%
Secured debt \| LIBOR \| Oxford Loan \| Minimum
Loan and Security Agreements
Variable rate base (as a percent)				0.47%
Secured debt \| Prime \| Hercules Loan
Loan and Security Agreements
Variable rate basis			Prime minus 4.25%
Variable interest rate margin (as a percent)			9.00%
Variable rate adjustment (as a percent)			4.25%
Secured debt \| First year \| Hercules Loan
Loan and Security Agreements
Prepayment premium as percentage of outstanding principal			3.00%
Secured debt \| Second year \| Hercules Loan
Loan and Security Agreements
Prepayment premium as percentage of outstanding principal			2.00%
Secured debt \| After the second year \| Hercules Loan
Loan and Security Agreements
Prepayment premium as percentage of outstanding principal			1.00%