Fair Value of Financial Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Liabilities measured at fair value on a recurring basis are categorized in the tables below based upon the lowest level of significant input to the valuations:



	As of March 31, 2019
	Level 1		Level 2		Level 3
Liabilities:
Contingent consideration (1)	$	—	$	—	$	5,205
Total	$	—	$	—	$	5,205
	As of December 31, 2018
	Level 1		Level 2		Level 3
Liabilities:
Contingent consideration (1)	$	—	$	—	$	5,531
Total	$	—	$	—	$	5,531

(1)

Contingent consideration liability represents arrangements to pay the former owners of certain companies we acquired based on the former owners attaining future product release milestones. We use a probability-weighted discounted cash flow model to estimate the fair value of contingent consideration liabilities. These probability weightings are developed internally and assessed on a quarterly basis. The remaining undiscounted maximum payment under these arrangements was $5.6 million as of March 31, 2019. We paid $0.3 million as part of these arrangements during the three months ended March 31, 2019, which was the primary reason for the change in the fair value of the contingent consideration from December 31, 2018 to March 31, 2019.