Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of
	June 30, 2019		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	13,867		—	$	13,867		—
Marketable securities		61,598		—		61,598		—
	$	75,465		—	$	75,465		—
Liabilities:
Kolltan acquisition contingent consideration	$	14,281		—		—	$	14,281
	$	14,281		—		—	$	14,281

	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 six months ended June 30, 2019 (in thousands):

	Other  Liabilities:
	Contingent
	Consideration
Balance at December 31, 2018	$	13,779
Fair value adjustments included in operating expenses		502
Balance at June 30, 2019	$	14,281