4. Investments

Cash, cash equivalents and investments consist of the following (in thousands):


	June 30, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Cash and cash equivalents:
Cash and money market accounts	$	27,583	$	—	$	—	$	27,583
Total cash and cash equivalents	$	27,583	$	—	$	—	$	27,583
Investments:
Corporate bonds and commercial paper (due within 1 year)	$	30,340	$	6	$	(11)	$	30,335
Total investments	$	30,340	$	6	$	(11)	$	30,335
Total cash, cash equivalents, and investments	$	57,923	$	6	$	(11)	$	57,918


	December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Cash and cash equivalents:
Cash and money market accounts	$	22,349	$	—	$	—	$	22,349
Overnight repurchase agreements		10,000		—		—		10,000
Total cash and cash equivalents	$	32,349	$	—	$	—	$	32,349
Investments:
Corporate bonds and commercial paper (due within 1 year)	$	48,519	$	53	$	(24)	$	48,548
Total investments	$	48,519	$	53	$	(24)	$	48,548
Total cash, cash equivalents, and investments	$	80,868	$	53	$	(24)	$	80,897

There were no realized gains or losses on investments for the three and six months ended June 30, 2017 or 2016. There were no investments that had been in an unrealized loss position for more than 12 months as of June 30, 2017 or December 31, 2016. There were 8 debt securities in an unrealized loss position for less than 12 months at June 30, 2017 and there were 14 debt securities that had been in an unrealized loss position for less than 12 months at December 31, 2016. The aggregate unrealized loss on these securities as of June 30, 2017 and December 31, 2016 was approximately $11,000 and $24,000, respectively, and the fair value was $17.4 million and $23.6 million, respectively. The Company considered the decline in the market value for these securities to be primarily attributable to current economic conditions. As it was not more likely than not that the Company would be required to sell these securities before the recovery of their amortized cost basis, which may be at maturity, the Company did not consider these investments to be other-than-temporarily impaired as of June 30, 2017.