Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of
	December 31, 2020		Level 1	Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	35,066	—	$	35,066		—
Marketable securities		150,586	—		150,586		—
	$	185,652	—	$	185,652		—
Liabilities:
Kolltan acquisition contingent consideration	$	8,267	—		—	$	8,267
	$	8,267	—		—	$	8,267

	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

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 year ended December 31, 2020 (in thousands):

	Other Liabilities:
	Contingent
	Consideration
Balance at December 31, 2019	$	12,485
Fair value adjustments included in operating expenses		(4,218)
Balance at December 31, 2020	$	8,267