Investments

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



(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	74,266	$	—	$	—		$	74,266
Total cash and cash equivalents	$	74,266	$	—	$	—		$	74,266
Investments:
Certificates of deposit (due within 1 year)	$	11,559	$	6	$	—		$	11,565
Certificates of deposit (due within 2 years)	3,320		4		(1		)	3,323
Commercial paper (due within 1 year)	5,986		—		(3		)	5,983
Corporate bonds (due within 1 year)	22,986		1		(45		)	22,942
Corporate bonds (due within 2 years)	8,187		3		(32		)	8,158
Government agencies (due within 1 year)	4,533		—		(1		)	4,532
Total investments	$	56,571	$	14	$	(82	)	$	56,503
Total cash, cash equivalents, and investments	$	130,837	$	14	$	(82	)	$	130,769

Cash, cash equivalents and investments as of December 31, 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	$	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