Note 3. Marketable Securities

The Company’s marketable securities consisted of the following as of March 31, 2017 and December 31, 2016:

	March 31, 2017
	Amortized Cost Basis			Unrealized Gains		Unrealized Losses			Aggregate Fair Value
	(in thousands)
Marketable securities:
Money market accounts	$	6		$	—	$	—		$	6
Corporate debt securities		40,407			—		(132	)		40,275
Less: Cash equivalents		(6	)		—		—			(6	)
Total marketable securities	$	40,407		$	—	$	(132	)	$	40,275

	December 31, 2016
	Amortized Cost Basis			Unrealized Gains		Unrealized Losses			Aggregate Fair Value
	(in thousands)
Marketable securities:
Money market accounts	$	1,580		$	—	$	—		$	1,580
Corporate debt securities		38,728			3		(163	)		38,568
Less: Cash equivalents		(1,580	)		—		—			(1,580	)
Total marketable securities	$	38,728		$	3	$	(163	)	$	38,568

As of March 31, 2017 and December 31, 2016, the contractual maturities of the Company’s marketable securities less than one year were $20.6 million and $13.0 million, respectively, and the contractual maturities of the Company’s marketable securities greater than one year and less than five years were $19.6 million and $25.6 million, respectively. Management determined that the gross unrealized losses of $132,000 on the Company’s marketable securities as of March 31, 2017 were temporary in nature. Gross unrealized losses on the Company’s marketable securities were $163,000 as of December 31, 2016. The Company currently does not intend to sell these securities prior to maturity and does not consider these investments to be other-than-temporarily impaired as of March 31, 2017. There were no sales of marketable securities in any of the periods presented.