Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Measurements

Schedule of financial assets and liabilities subject to fair value measurements

	As of June 30, 2017		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	44,622	$	—	$	44,622	$	—
Marketable securities	87,822		—		87,822		—
	$	132,444	$	—	$	132,444	$	—
Liabilities:
Kolltan acquisition contingent consideration	$	48,600	$	—	$	—	$	48,600
	$	48,600	$	—	$	—	$	48,600

	As of December 31, 2016		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	20,445	$	—	$	20,445	$	—
Marketable securities	147,315		—		147,315		—
	$	167,760	$	—	$	167,760	$	—
Liabilities:
Kolltan acquisition contingent consideration	$	44,200	$	—	$	—	$	44,200
	$	44,200	$	—	$	—	$	44,200

Schedule of the activity for the Company's contingent consideration liabilities measured at fair value using Level 3 inputs

	Other Long-Term Liabilities: Contingent Consideration
Balance at December 31, 2016	$	44,200
Fair value adjustments included in operating expenses	4,400
Balance at June 30, 2017	$	48,600