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Fair Value Measurements
12 Months Ended
Dec. 31, 2016
Fair Value Disclosures [Abstract]  
Fair Value Measurements
4. Fair Value Measurements
Fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date.
 
Fair Value Measurements at December 31, 2015
 
Level 1
 
Level 2
 
Level 3
 
Total
Liabilities:
 
 
 
 
 
 
 
Earnout consideration liability
$

 
$

 
$
500

 
$
500

 
Fair Value Measurements at December 31, 2016
 
Level 1
 
Level 2
 
Level 3
 
Total
Liabilities:
 
 
 
 
 
 
 
Earnout consideration liability
$

 
$

 
$
2,500

 
$
2,500


The following table presents additional information about liabilities measured at fair value on a recurring basis and for which we have utilized significant unobservable (Level 3) inputs to determine fair value:
Ending balance at December 31, 2014
$
500

Ending balance at December 31, 2015
500

Additions - stock earnouts
2,400

Additions - cash earnouts
2,500

Settlements - stock earnouts
(2,400
)
Settlements - cash earnouts
(500
)
Ending balance at December 31, 2016
$
2,500


The fair value of the earnout consideration was determined using the Binary Option model based on the present value of the probability-weighted earnout consideration.
Debt
The Company believes the carrying value of its long-term debt at December 31, 2016 approximates its fair value based on the variable interest rate feature or based upon interest rates currently available to the Company.
The estimated fair value of our debt at December 31, 2016 and 2015 is $49.4 million and $24.9 million, respectively,  based on valuation methodologies using interest rates currently available to the Company which are Level 2 inputs.