Investments

Cash, cash equivalents and investments as of September 30, 2015 included the following:



(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	106,946	$	—	$	—		$	106,946
Total cash and cash equivalents	$	106,946	$	—	$	—		$	106,946
Investments:
Certificates of deposit (due within 1 year)	$	20,241	$	9	$	—		$	20,250
Certificates of deposit (due within 2 years)	3,840		1		(1		)	3,840
Commercial paper (due within 1 year)	4,477		—		(2		)	4,475
Corporate bonds (due within 1 year)	20,582		—		(24		)	20,558
Corporate bonds (due within 2 years)	3,882		—		(15		)	3,867
Government agencies (due within 1 year)	3,009		—		—			3,009
Total investments	$	56,031	$	10	$	(42	)	$	55,999
Total cash, cash equivalents, and investments	$	162,977	$	10	$	(42	)	$	162,945

Cash, cash equivalents and investments as of December 31, 2014 included the following:



(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	84,613	$	—	$	—		$	84,613
Certificates of deposit	472		—		—			472
Corporate bonds	501		—		—			501
Total cash and cash equivalents	$	85,586	$	—	$	—		$	85,586
Investments:
Certificates of deposit (due within 1 year)	$	25,823	$	—	$	(9	)	$	25,814
Certificates of deposit (due within 2 years)	4,429		1		(3		)	4,427
Commercial paper (due within 1 year)	5,988		1		(3		)	5,986
Corporate bonds (due within 1 year)	16,487		—		(24		)	16,463
Corporate bonds (due within 2 years)	13,912		—		(64		)	13,848
Government agencies (due within 1 year)	6,082		—		(6		)	6,076
Total investments	$	72,721	$	2	$	(109	)	$	72,614
Total cash, cash equivalents, and investments	$	158,307	$	2	$	(109	)	$	158,200