Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of
	December 31, 2019		Level 1	Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	4,024	—	$	4,024		—
Marketable securities		53,151	—		53,151		—
	$	57,175	—	$	57,175		—
Liabilities:
Kolltan acquisition contingent consideration	$	12,485	—		—	$	12,485
	$	12,485	—		—	$	12,485

	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

	Other Liabilities:
	Contingent
	Consideration
Balance at December 31, 2018	$	13,779
Fair value adjustments included in operating expenses		(1,294)
Balance at December 31, 2019	$	12,485