5. CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

The following table summarizes the Company’s financial assets with maturities of less than 90 days from the date of purchase included in cash equivalents in the unaudited condensed consolidated balance sheets for each of the periods indicated:

	As of September 30, 2018		As of December 31, 2017
	(in thousands)
Money market funds	$	85,321	$	352,370
Corporate bonds		—		16,720
Government and government agency bonds		99,926		49,972
Total	$	185,247	$	419,062

It is the Company’s policy to mitigate credit risk in its financial assets by maintaining a well-diversified portfolio that limits the amount of exposure as to maturity and investment type. The weighted average maturity of the Company’s available-for-sale securities as of September 30, 2018 and December 31, 2017 was approximately two and seven months, respectively.

The following tables summarize the Company’s cash, cash equivalents and short-term investments for each of the periods indicated:

	As of September 30, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in thousands)
Cash and money market funds	$	109,776	$	—	$	—			109,776
Commercial paper		89,795		—		—			89,795
Government and government agency bonds		509,944		213		(129	)		510,028
Corporate bonds		83,337		—		(76	)		83,261
Total	$	792,852	$	213	$	(205	)		792,860
As reported:
Cash and cash equivalents	$	209,576	$	126	$	—			209,702
Short-term investments		583,276		87		(205	)		583,158
Total	$	792,852	$	213	$	(205	)		792,860

	As of December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in thousands)
Cash and money market funds	$	532,999	$	—	$	—		$	532,999
Commercial paper - current		133,368		—		—			133,368
Government and government agency bonds - current		294,915		2		(200	)		294,717
Corporate bonds
Current		118,121		—		(145	)		117,976
Non-current		10,016		—		(36	)		9,980
Total	$	1,089,419	$	2	$	(381	)	$	1,089,040
As reported:
Cash and cash equivalents	$	599,698	$	2	$	(9	)	$	599,691
Short-term investments		479,705		—		(336	)		479,369
Long-term investments		10,016		—		(36	)		9,980
Total	$	1,089,419	$	2	$	(381	)	$	1,089,040