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Contingent Consideration
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Contingent Consideration Contingent Consideration
Contingent consideration liabilities associated with business combinations are fair value measurement items. These liabilities represent an obligation of the Company to transfer additional assets to the selling shareholders and owners if future events occur or conditions are met. These liabilities associated with business combinations are measured at fair value at inception and at each subsequent reporting date. The changes in the fair value are primarily due to the expected amount and timing of future net sales, which are inputs that have no observable market (Level 3).

The Company also has contingent consideration associated with its asset acquisitions. These liabilities are not recorded as level 3 fair value measurements, but rather are accrued when the milestone has been achieved and is payable.

The following table is a reconciliation of the beginning and ending balance of contingent considerations and is based on level 3 significant unobservable inputs, other than the milestone accrual, which is based on achievement of contractual milestones.
 
 
Balance at December 31, 2018
$
60.0

Milestone achievement - asset acquisition
10.0

Measurement period adjustment
1.5

Change in fair value
12.4

Settlements
(13.7
)
Balance at September 30, 2019
$
70.2


During the nine months ended September 30, 2019, a contingent milestone was achieved related to the Company's acquisition of raxibacumab in October 2017. The acquisition of raxibacumab was accounted for as an asset acquisition and therefore the achievement of the $10.0 million milestone resulted in an increase to the contingent consideration liability with a corresponding increase in intangible assets.