FAIR VALUE MEASUREMENTS (Table)

12 Months Ended

Dec. 31, 2016

FAIR VALUE MEASUREMENTS

Schedule of financial assets subject to fair value measurements

	As of December 31, 2015		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Money market funds and cash equivalents	$	59,831		—	$	59,831		—
Marketable securities	$	217,781		—	$	217,781		—
	$	277,612		—	$	277,612		—

	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 acquisition-related contingent consideration

	December 31, 2016
Balance at beginning of period	$	—
Milestone payments		—
Changes in fair value		—
Kolltan acquisition contingent consideration	$	44,200
Balance at end of period	$	44,200