FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2018

Assets and Liabilities Measured at Fair Value

The Company’s assets and liabilities measured at fair value on a recurring basis were as follows:

	September 30, 2018
(in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	10,212	$	15,212	$	—	$	25,424
Marketable securities:
Municipal bonds	$	—	$	46,366	$	—	$	46,366
Corporate bonds		—		53,416		—		53,416
Total marketable securities	$	—	$	99,782	$	—	$	99,782
Investments in privately-held companies(1)	$	—	$	—	$	2,890	$	2,890

  ⁽¹⁾ Included in other long-term assets.

	December 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	2,720	$	40,051	$	—	$	42,771
Marketable securities:
Municipal bonds	$	—	$	32,848	$	—	$	32,848
Corporate bonds		—		28,621		—		28,621
Total marketable securities	$	—	$	61,469	$	—	$	61,469
Investments in privately-held companies(1)	$	—	$	—	$	1,030	$	1,030

  ⁽¹⁾ Included in other long-term assets.