Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of
	September 30, 2018		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	24,145		—	$	24,145		—
Marketable securities		72,795		—		72,795		—
	$	96,940		—	$	96,940		—
Liabilities:
Kolltan acquisition contingent consideration	$	15,432		—		—	$	15,432
	$	15,432		—		—	$	15,432

	As of
	December 31, 2017		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	24,061		—	$	24,061		—
Marketable securities		99,139		—		99,139		—
	$	123,200		—	$	123,200		—
Liabilities:
Kolltan acquisition contingent consideration	$	43,400		—		—	$	43,400
	$	43,400		—		—	$	43,400

Schedule of the Company's 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 nine months ended September 30, 2018 (in thousands):

	Other  Liabilities:
	Contingent
	Consideration
Balance at December 31, 2017	$	43,400
Fair value adjustments included in operating expenses		(27,968)
Balance at September 30, 2018	$	15,432