FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair value of marketable securities and investments

The fair-value hierarchy of the Company's marketable securities at September 30, 2015, and December 31, 2014, was as follows:

	Fair Value Measurement at
	September 30, 2015
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	18,019	$	—	$	18,019
Money market funds	11,742		11,742		—
Corporate securities	78,777		—		78,777
Total	$	108,538	$	11,742	$	96,796

	Fair Value Measurement at
	December 31, 2014
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Money market funds	$	3,370	$	3,370	$	—
Corporate securities	114,575		—		114,575
Total	$	117,945	$	3,370	$	114,575