Investments

Investments in marketable securities as of December 31, 2016 consisted of the following:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value

	(in thousands)
Available-for-sale — short-term:
U.S. Treasury, government and agency debt securities	$	23,237	$	1	$	(2	)	$	23,236
Corporate debt securities	17,314		—		—			17,314
Total	$	40,551	$	1	$	(2	)	$	40,550

As of December 31, 2016, the Company's available-for-sale securities had a weighted remaining contractual maturity of 0.3 years. For the year ended December 31, 2016, there were no realized gains (losses) and there were no unrealized holding gains (losses) reclassified out of accumulated other comprehensive income (loss) into the consolidated statements of operations for the sale of available-for-sale investments.

Investments in marketable securities as of December 31, 2015 consisted of the following:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value

	(in thousands)
Available-for-sale — short-term:
U.S. Treasury, government and agency debt securities	$	10,485	$	—	$	(22	)	$	10,463
Corporate debt securities	12,786		—		—			12,786
Total	$	23,271	$	—	$	(22	)	$	23,249
Available-for-sale — long-term:
U.S. Treasury, government and agency debt securities	$	13,529	$	—	$	(46	)	$	13,483

The amortized cost and fair value of the Company's marketable securities at December 31, 2016, by contractual years-to-maturity are as follows:



	Amortized Cost		Fair Value

	(in thousands)
Due in less than 1 year	$	40,551	$	40,550
Due within 1-2 years	—		—
Total	$	40,551	$	40,550