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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2016
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 5. Fair Value Measurements The Company records its financial assets and liabilities at fair value. The carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, trade receivable and accounts payable, approximate their fair value due to their short maturities. Fair value is defined as the exchange price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The accounting guidance for fair value establishes a framework for measuring fair value and a fair value hierarchy that prioritizes the inputs used in valuation techniques. The accounting standard describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value, which are the following: Level 1 – Observable inputs, such as quoted prices in active markets for identical assets or liabilities. Level 2 – Observable inputs, either directly or indirectly, other than quoted prices in active markets for similar assets or liabilities, that are not active or other inputs that are not observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities; therefore, requiring an entity to develop its own valuation techniques and assumptions. The following tables set forth the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as follows (in thousands):
|  | Fair Value Measurements at March 31, 2016 Using |
|  | Quoted Prices in Active Markets for Identical Assets |  |  | Significant Other Observable Inputs |  |  | Significant Unobservable Inputs |  |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds (1) |  | $ | 43,110 |  |  | $ | — |  |  | $ | — |  |  | $ | 43,110 |
Marketable securities |  |  | 454 |  |  |  | — |  |  |  | — |  |  |  | 454 |
|  | $ | 43,564 |  |  | $ | — |  |  | $ | — |  |  | $ | 43,564 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent warrant liabilities |  | $ | — |  |  | $ | — |  |  | $ | 3,532 |  |  | $ | 3,532 |
|  | Fair Value Measurements at December 31, 2015 Using |
|  | Quoted Prices in Active Markets for Identical Assets |  |  | Significant Other Observable Inputs |  |  | Significant Unobservable Inputs |  |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds (1) |  | $ | 42,590 |  |  | $ | — |  |  | $ | — |  |  | $ | 42,590 |
Marketable securities |  |  | 496 |  |  |  | — |  |  |  | — |  |  |  | 496 |
Total |  | $ | 43,086 |  |  | $ | — |  |  | $ | — |  |  | $ | 43,086 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent warrant liabilities |  | $ | — |  |  | $ | — |  |  | $ | 10,464 |  |  | $ | 10,464 |
(1) | Included in cash and cash equivalents
During the three month period ended March 31, 2016, there were no transfers between Level 1, Level 2, or Level 3 assets or liabilities reported at fair value on a recurring basis and the valuation techniques used did not change compared to the Company’s established practice. The estimated fair value of the contingent warrant liabilities at March 31, 2016 and December 31, 2015, was determined using the Black-Scholes Model, which requires inputs such as the expected term of the warrants, volatility and risk-free interest rate. These inputs are subjective and generally require significant analysis and judgment to develop. The Company’s common stock price represents a significant input that affects the valuation of the warrants. The change in the estimated fair value is recorded as a gain or loss in the revaluation of contingent warrant liabilities line of the condensed consolidated statements of comprehensive loss. The estimated fair value of the contingent warrant liabilities was estimated using the following range of assumptions at March 31, 2016, and December 31, 2015:
|  | March 31, 2016 |  | December 31, 2015
Expected volatility |  | 115% - 186% |  | 166% - 183%
Risk-free interest rate |  | 0.50% - 0.60% |  | 0.64% - 0.74%
Expected term |  | 0.69 - 0.94 |  | 0.94 - 1.19
The following table provides a summary of changes in the estimated fair value of the Company’s Level 3 financial liabilities for the three months ended March 31, 2016 (in thousands):
Balance at December 31, 2015 |  | $ | 10,464 |
Decrease in estimated fair value of contingent warrant liabilities upon revaluation |  |  | (6,932 | )
Balance at March 31, 2016 |  | $ | 3,532 |
The estimated fair value of the Company’s outstanding interest-bearing obligations is estimated using the net present value of the payments, discounted at an interest rate that is consistent with market interest rates, which is a Level 2 input. The carrying amount and the estimated fair value of the Company’s outstanding interest-bearing obligations at March 31, 2016, and December 31, 2015, are as follows (in thousands):
|  | March 31, 2016 |  |  | December 31, 2015 |
|  | Carrying Amount |  |  | Estimated Fair Value |  |  | Carrying Amount |  |  | Estimated Fair Value |
Hercules term loan |  | $ | 19,849 |  |  | $ | 21,231 |  |  | $ | 19,653 |  |  | $ | 21,231 |
Novartis note |  |  | 13,683 |  |  |  | 13,450 |  |  |  | 13,683 |  |  |  | 13,394 |
Servier loan |  |  | 12,719 |  |  |  | 12,626 |  |  |  | 15,331 |  |  |  | 15,185 |
Total |  | $ | 46,251 |  |  | $ | 47,307 |  |  | $ | 48,667 |  |  | $ | 49,810 |

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13504-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + Details
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