Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of
	March 31, 2019		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	21,432		—	$	21,432		—
Marketable securities		53,535		—		53,535		—
	$	74,967		—	$	74,967		—
Liabilities:
Kolltan acquisition contingent consideration	$	15,298		—		—	$	15,298
	$	15,298		—		—	$	15,298

	As of
	December 31, 2018		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	15,755		—	$	15,755		—
Marketable securities		69,712		—		69,712		—
	$	85,467		—	$	85,467		—
Liabilities:
Kolltan acquisition contingent consideration	$	13,779		—		—	$	13,779
	$	13,779		—		—	$	13,779

Schedule of the contingent consideration liabilities measured at fair value using Level 3 inputs

The following table reflects the activity for the Company’s contingent consideration liabilities measured at fair value using Level 3 inputs for the three months ended March 31, 2019 (in thousands):

	Other  Liabilities:
	Contingent
	Consideration
Balance at December 31, 2018	$	13,779
Fair value adjustments included in operating expenses		1,519
Balance at March 31, 2019	$	15,298