Summary of Significant Accounting Policies

The Company’s significant accounting policies are described in Note 2 to its audited consolidated financial statements for the year ended December 31, 2014, which are included in the Company’s Annual Report on Form 10-K that was filed with the SEC on February 26, 2015. Except as discussed below, these accounting policies have not significantly changed during the nine months ended September 30, 2015.

Goodwill

The Company accounts for goodwill in accordance with authoritative guidance which requires that goodwill be tested for impairment at least annually. The Company tests goodwill for impairment as of December 31 of each year, or more frequently if events and circumstances warrant. These assets are impaired if the Company determines that their carrying values may not be recoverable based on an assessment of certain events or changes in circumstances. If the assets are considered to be impaired, the Company recognizes the amount by which the carrying value of the assets exceeds the fair value of the assets as an impairment loss. In the third quarter of 2015, the market value of the Company’s common stock substantially declined. As a result of this decline, the Company determined that it had an indicator of impairment of its goodwill, and an interim test of goodwill impairment was required. As a result, the Company reviewed its goodwill for impairment under a two-part test in accordance with authoritative guidance.

The Company estimated the fair value in step one of the goodwill impairment test based on a combination of the income approach which included discounted cash flows as well as a market approach that utilized the guideline company market information. The fair value measurements utilized to perform the impairment analysis are categorized within Level 3 of the fair value hierarchy. The Company’s discounted cash flows required management judgment with respect to forecasted sales, launch of new products, gross margin, selling, general and administrative expenses, capital expenditures and the selection and use of an appropriate discount rate and terminal rate. For purposes of calculating the discounted cash flows, the Company used estimated revenue growth rates between 3% and 13% for the discrete forecast period. Cash flows beyond the discrete forecast period were estimated using a terminal value calculation, which incorporated historical and forecasted financial trends and considered long-term earnings growth rates for publicly traded peer companies. Future cash flows were then discounted to present value at a discount rate of 13.5%, and terminal value growth rate of 3%. The Company's market capitalization was also considered in assessing the reasonableness of the Company’s fair value as determined in step one of the goodwill impairment test. The Company’s assessment resulted in a fair value that was lower than the Company’s carrying value of net assets at September 30, 2015.

Based upon step one of the test, the Company determined that its goodwill was impaired and that step two of the test was required to measure the amount of goodwill impairment. As a result of step two, in the third quarter of 2015 the Company recorded a charge of $164.3 million, representing the write-off of the remaining balance of goodwill. Due to the length of time necessary to measure impairment of goodwill, the goodwill impairment analysis was not completed as of the time of the filing of this Quarterly Report on Form 10-Q and is subject to change. The Company expects to complete the step two impairment analysis prior to reporting its financial results for the fourth quarter of 2015 and will record any adjustments to this preliminary estimate at that time.

Fair Value Measurements

The carrying amount of financial instruments consisting of cash, restricted cash, trade accounts receivable, prepaid expenses and other current assets, accounts payable, accrued expenses, accrued compensation and current portion of long-term debt included in the Company’s consolidated financial statements are reasonable estimates of fair value due to their short maturities. Based on the borrowing rates currently available to the Company for loans with similar terms, management believes the fair value of long-term debt approximates its carrying value.

Authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:



Level 1:	Observable inputs such as quoted prices in active markets;
Level 2:	Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and
Level 3:	Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

The Company does not maintain any financial instruments that are considered to be Level 1 or Level 2 instruments as of September 30, 2015 or December 31, 2014. The Company classifies its common stock warrant liabilities within Level 3 of the fair value hierarchy because they are valued using valuation models with significant unobservable inputs. The following table provides a reconciliation of liabilities measured at fair value using significant unobservable inputs (Level 3) for the nine months ended September 30, 2015 (in thousands):



	Common Stock Warrant Liabilities
Balance at December 31, 2014	$	8,702
Changes in fair value	(8,015		)
Balance at September 30, 2015	$	687

Common stock warrant liabilities are measured at fair value using the Black-Scholes option pricing valuation model. The assumptions used in the Black-Scholes option pricing valuation model for the common stock warrant liabilities were: (a) a risk-free interest rate based on the rates for U.S. Treasury zero-coupon bonds with maturities similar to those of the remaining contractual term of the warrants; (b) an assumed dividend yield of zero based on the Company’s expectation that it will not pay dividends in the foreseeable future; (c) an expected term based on the remaining contractual term of the warrants; and (d) an expected volatility based upon the Company's historical volatility over the remaining contractual term of the warrants. The significant unobservable input used in measuring the fair value of the common stock warrant liabilities associated with the Deerfield Facility Agreement (described in Note 5 below) is the expected volatility. Significant increases in volatility would result in a higher fair value measurement.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued new accounting guidance related to revenue recognition. This new standard will replace all current U.S. GAAP guidance on this topic and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. On August 12, 2015, the FASB issued guidance deferring the effective date by one year to December 15, 2017 for annual reporting periods beginning after that date. The FASB also permitted early adoption of the standard, but not before the original effective date of December 15, 2016. The Company is currently evaluating the impact, if any, the adoption of this standard will have on its financial statements.

In August 2014, the FASB issued guidance related to disclosures of uncertainties about an entity’s ability to continue as a going concern. The guidance requires management to evaluate whether there are conditions and events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the financial statements are issued. Management will be required to make this evaluation for both annual and interim reporting periods and will have to make certain disclosures if it concludes that substantial doubt exists or when its plans alleviate substantial doubt about the entity’s ability to continue as a going concern. Substantial doubt exists when relevant conditions and events, considered in the aggregate, indicate that it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. The guidance is effective for annual periods ending after December 15, 2016 and for interim reporting periods within annual periods beginning after December 15, 2016, with early adoption permitted. The Company is currently evaluating the impact of this guidance and expects to adopt the standard for the annual reporting period ending December 31, 2016.

In April 2015, the FASB issued guidance that amends existing guidance to require the presentation of debt issuance costs in the balance sheet as a deduction from the carrying amount of the related debt liability instead of a deferred charge. The guidance will not change the amortization of debt issuance costs, which will continue to follow the existing accounting guidance. The guidance is effective for annual reporting periods beginning after December 15, 2015, but early adoption is permitted. The Company is currently evaluating the impact of adopting this new accounting standard on its financial statements.