Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2017

Investments Classified as Available-For-Sale

Marketable securities classified as available-for-sale as of December 31, 2017 and 2016 were comprised of (in thousands):

	December 31, 2017								December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Asset-backed securities	$	13,748	$	—	$	(5)	$	13,743	$	23,636	$	—	$	(4)	$	23,632
Corporate debt securities		37,265		—		(12)		37,253		67,457		43		(6)		67,494
Total	$	51,013	$	—	$	(17)	$	50,996	$	91,093	$	43	$	(10)	$	91,126

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details