Cash, cash equivalents and short-term investments

The following tables summarize our cash, cash equivalents and short-term investments at June 30, 2016 and December 31, 2015 (in thousands):



June 30, 2016	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and money market funds	$	95,894	$	—	$	—		$	95,894
Corporate debt securities	0		0		0			0
Due in one year or less	50,549		17		(10		)	50,556
Due in two years or less	1,201		2		—			1,203
Total	$	147,644	$	19	$	(10	)	$	147,653
Reported as:
Cash and cash equivalents	$	95,894	$	—	$	—		$	95,894
Short-term investments	51,750		19		(10		)	51,759
Total	$	147,644	$	19	$	(10	)	$	147,653



December 31, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and money market funds	$	43,224	$	—	$	—		$	43,224
Corporate debt securities	0		0		0			0
Due in one year or less	68,898		—		(107		)	68,791
Due in two years or less	14,710		—		(63		)	14,647
Total	$	126,832	$	—	$	(170	)	$	126,662
Reported as:
Cash and cash equivalents	$	43,224	$	—	$	—		$	43,224
Short-term investments	83,608		—		(170		)	83,438
Total	$	126,832	$	—	$	(170	)	$	126,662

At June 30, 2016 and December 31, 2015 we held six and forty-three debt securities that had been in an unrealized loss position for less than 12 months, respectively. At June 30, 2016 we also held five investments that had been in a continuous unrealized loss position for 12 months or longer. The losses related to these five investments are immaterial at June 30, 2016 and we believe that we will receive our full principal investment when these securities mature in the next 9 months. At December 31, 2015 we held no investments that had been in a continuous unrealized loss position for 12 months or longer.

At June 30, 2016 and December 31, 2015 the aggregate fair value of the securities in an unrealized loss position for less than 12 months was $10.8 million and $81.4 million, respectively. At June 30, 2016 the aggregate fair value of the securities in an unrealized loss position for longer than 12 months was $6.6 million. We evaluated our securities for other-than-temporary impairments based on quantitative and qualitative factors, and we considered the decline in market value for the eleven debt securities in an unrealized loss position as of June 30, 2016 to be primarily attributable to the then current economic and market conditions. We will likely not be required to sell these securities, and we do not intend to sell these securities before the recovery of their amortized cost bases, which recovery is expected within the next 12 months. Based on our analysis, we do not consider these investments to be other-than-temporarily impaired as of June 30, 2016.

As of June 30, 2016, we held $5.3 million in financial institution debt securities and other corporate debt securities located in Canada and Australia. As of December 31, 2015, we held $11.7 million in financial institution debt securities and other corporate debt securities located in Canada, the United Kingdom and Australia. Based on our analysis, we do not consider these investments to be other-than-temporarily impaired as of June 30, 2016.

We had immaterial realized gains and no realized losses or other-than-temporary impairments on our short-term investments for the three and six months ended June 30, 2016. We had immaterial realized gains and no realized losses or other-than-temporary impairments on our short-term investments for the three and six months ended June 30, 2015.