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Fair value measurements | 9 Months Ended
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Sep. 30, 2018
Fair value measurements [Abstract] |
Fair value measurements | 4. Fair value measurements Contingent consideration includes liabilities measured at fair value on a recurring basis. For the three and nine months ended September 30, 2018, the contingent purchase consideration obligations associated with RSDL increased by $0.2 million and $1.8 million, respectively. During the three and nine months ended September 30, 2017, the contingent purchase consideration obligations associated with RSDL increased by $0.9 million and $1.4 million, respectively. The changes in the fair value of the RSDL contingent consideration obligations are primarily due to the expected amount and timing of future net sales, which are inputs that have no observable market (Level 3). These changes are classified in the Company's statement of operations as cost of product sales and contract manufacturing. The following table is a reconciliation of the beginning and ending balance of the liabilities, consisting only of contingent consideration, measured at fair value, using significant unobservable inputs (Level 3) during the nine months ended September 30, 2018.
(in thousands) |  |  |
Balance at December 31, 2017 |  | $ | 12,274 |
Expense included in earnings |  |  | 1,917 |
Settlements |  |  | (2,234 | )
Balance at September 30, 2018 |  | $ | 11,957 |
Separate disclosure is required for assets and liabilities measured at fair value on a recurring basis from those measured at fair value on a non-recurring basis. As of September 30, 2018 and 2017 and for the quarters then ended, the Company had no significant assets or liabilities that were measured at fair value on a non-recurring basis.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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