Note 6

– Marketable Securities

The Company invests in short-term and long-term agency, municipal, corporate and other debt securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-maturity is based on the Company

’s ability and intent to hold these securities to maturity. Information regarding the Company’s short-term and long-term marketable securities as of September 30, 2016 and December 31, 2015 is as follows:

	September 30, 2016
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	42,718	$	7	$	(76	)	$	42,649
Corporate debt securities		32,745		18		(33	)		32,730
U.S. government agency securities		24,770		4		(25	)		24,749
Certificates of deposit/time deposits		7,182		32		-			7,214
Total marketable securities	$	107,415	$	61	$	(134	)	$	107,342

	December 31, 2015
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	35,667	$	8	$	(56	)	$	35,619
Corporate debt securities		28,133		-		(114	)		28,019
U.S. government agency securities		26,784		2		(99	)		26,687
Certificates of deposit/time deposits		5,909		2		(11	)		5,900
Commercial paper		1,497		-		(2	)		1,495
Total marketable securities	$	97,990	$	12	$	(282	)	$	97,720

Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1). Fair values for the U.S. municipal securities, U.S. government agency securities and certificates of deposit are primarily determined using dealer quotes or quoted market prices for similar securities (Level 2).

The Company tests for other-than-temporary losses on a quarterly basis and has considered the unrealized losses indicated above, which are the result of changes in interest rates, to be temporary in nature. In reaching this conclusion, the Company considered the credit quality of the issuers of the debt securities as well as the Company

’s intent to hold the investments to maturity and recover the full principal.

Classification of marketable securities as current or non-current is based upon the security

’s maturity date as of the date of these financial statements.

The September

30, 2016 balance of held-to-maturity debt securities by contractual maturity is shown in the following table at amortized cost. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

	September 30,
(in thousands)	2016
Due in one year or less	$	39,028
Due after one year through five years		68,387
Total marketable securities	$	107,415