FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Fair value of marketable securities and investments

    The fair-value hierarchy of the Company's cash equivalents and marketable securities at March 31, 2016, and December 31, 2015, was as follows:

	Fair Value Measurement at
	March 31, 2016
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	28,223	$	—	$	28,223
Money market funds	979		979		—
Corporate securities	90,419		—		90,419
Total	$	119,621	$	979	$	118,642

	Fair Value Measurement at
	December 31, 2015
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	21,194	$	—	$	21,194
Money market funds	104		104		—
Corporate securities	83,769		—		83,769
Total	$	105,067	$	104	$	104,963