Investments

Cash, cash equivalents and investments as of December 31, 2016 included the following:



			GROSS		GROSS
	AMORTIZED		UNREALIZED		UNREALIZED			FAIR
(in thousands)	COST		GAINS		LOSSES			VALUE
Cash and cash equivalents:
Cash and money market accounts	$	196,445	$	—	$	—		$	196,445
Commercial paper	1,500		—		—			1,500
Total cash and cash equivalents	$	197,945	$	—	$	—		$	197,945
Investments:
Certificates of deposit (due within 1 year)	$	6,920	$	4	$	(1	)	$	6,923
Corporate bonds (due within 1 year)	27,615		4		(75		)	27,544
Government agencies (due within 1 year)	1,250		—		—			1,250
Total investments	$	35,785	$	8	$	(76	)	$	35,717
Total cash, cash equivalents, and investments	$	233,730	$	8	$	(76	)	$	233,662

Cash, cash equivalents and investments as of December 31, 2015 included the following:



			GROSS		GROSS
	AMORTIZED		UNREALIZED		UNREALIZED			FAIR
(in thousands)	COST		GAINS		LOSSES			VALUE
Cash and cash equivalents:
Cash and money market accounts	$	91,060	$	—	$	—		$	91,060
Total cash and cash equivalents	$	91,060	$	—	$	—		$	91,060
Investments:
Certificates of deposit (due within 1 year)	$	13,611	$	1	$	(7	)	$	13,605
Certificates of deposit (due within 2 years)	4,760		—		(10		)	4,750
Commercial paper (due within 1 year)	5,977		—		(11		)	5,966
Corporate bonds (due within 1 year)	24,002		—		(65		)	23,937
Corporate bonds (due within 2 years)	9,142		—		(84		)	9,058
Government agencies (due within 1 year)	1,997		—		(3		)	1,994
Total investments	$	59,489	$	1	$	(180	)	$	59,310
Total cash, cash equivalents, and investments	$	150,549	$	1	$	(180	)	$	150,370