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Fair Value Measurements
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of the following periods (in thousands):
 
March 31, 2018
 
December 31, 2017
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents
$
101,812

 
$

 
$

 
$
101,812

 
$
36,086

 
$

 
$

 
$
36,086

Total assets measured at fair value
$
101,812

 
$

 
$

 
$
101,812

 
$
36,086

 
$

 
$

 
$
36,086

Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Contingent consideration

 

 
23,284

 
23,284

 

 

 
$
24,301

 
$
24,301

Deferred consideration
$

 
$
225,952

 
$

 
$
225,952

 
$

 
$
223,158

 
$

 
$
223,158

Total liabilities measured at fair value
$

 
$
225,952

 
$
23,284

 
$
249,236

 
$

 
$
223,158

 
$
24,301

 
$
247,459


There were no transfers of assets or liabilities between Level 1, Level 2 and Level 3 categories of the fair value hierarchy during the three month periods ended March 31, 2018 and the year ended December 31, 2017.
The Company used Level 1 inputs to determine the fair value of its cash equivalents, which primarily consist of funds held in government money market accounts and commercial paper. As such, the carrying value of cash equivalents approximates fair value. As of March 31, 2018 and December 31, 2017, the carrying value of cash equivalents was $101.8 million and $36.1 million, respectively.
In connection with the acquisition of the BNP Business, the Company will pay up to $280.0 million in cash, of which $256.0 million is guaranteed and is considered deferred consideration and $24.0 million is contingent consideration. The fair value of the deferred consideration was determined to be $220.6 million on the acquisition date based on the net present value of cash payments using an estimated borrowing rate using a quoted price for a similar liability. The Company recorded $2.8 million for the accretion of interest on the deferred consideration in the first quarter of 2018. The fair value of contingent consideration on the acquisition date was $19.7 million and was calculated using a discounted probability weighted valuation model.
In conjunction with the acquisitions of BioHelix Corporation in May 2013, AnDiaTec GmbH & Co. KG in August 2013 and Immutopics, Inc. in March 2016, the Company recorded contingent consideration of $3.6 million as of March 31, 2018 and $4.6 million as of December 31, 2017. The Company assesses the fair value of contingent consideration to be settled in cash related to these prior acquisitions using a discounted revenue model. Significant assumptions used in the measurement include revenue projections and discount rates. This fair value measurement of contingent consideration is based on significant inputs not observed in the market and thus represent Level 3 measurements.
Changes in estimated fair value of contingent consideration liabilities from December 31, 2017 through March 31, 2018 are as follows (in thousands):

Contingent consideration liabilities
(Level 3 measurement)
Balance at December 31, 2017
$
24,301

Cash payments
(1,017
)
Balance at March 31, 2018
$
23,284