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Marketable Securities

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Marketable Securities

Available-for-sale marketable securities as of December 31, 2018 and 2017 were as follows (in thousands):

			December 31, 2018
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
Corporate debt securities			$	12,738					$	—					$	(3)					$	12,735

			December 31, 2017
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
U.S. Treasury securities			$	3,995					$	—					$	(6)					$	3,989
Government-sponsored enterprises			11,998						—						(7)						11,991
Corporate debt securities			77,462						2						(50)						77,414
Total			$	93,455					$	2					$	(63)					$	93,394

All of the Company's available-for-sale securities held at December 31, 2018 and 2017 had maturity dates of less than one year.

All available-for-sale securities in an unrealized loss position as of December 31, 2018 and 2017 were in a loss position for less than twelve months.  There were no unrealized losses at December 31, 2018 or 2017 that the Company determined to be other-than-temporary. The Company recorded interest income of $2.3 million, $2.4 million and $2.3 million during the years ended December 31, 2018, 2017 and 2016, respectively, which is included in other income (expense) on the consolidated statements of operations and comprehensive loss.

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- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-URI http://asc.fasb.org/subtopic&trid=2209399

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-URI http://asc.fasb.org/subtopic&trid=2324412

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-URI http://asc.fasb.org/topic&trid=2196928

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-URI http://asc.fasb.org/subtopic&trid=2176304

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