Available-for-Sale-Securities (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation

The following table is a summary of available-for-sale securities recorded in cash and cash equivalents in our Consolidated Balance Sheets (in thousands):

	December 31, 2018									December 31, 2017
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Corporate debt securities	$	33,536	$	—	$	(32	)	$	33,504	$	42,701	$	—	$	(28	)	$	42,673
Money market funds	4,314		—		—			4,314		9,212		—		—			9,212
Total	$	37,850	$	—	$	(32	)	$	37,818	$	51,913	$	—	$	(28	)	$	51,885

Schedule of Marketable Securities

Estimated fair values of available-for-sale securities are generally based on prices obtained from commercial pricing services. The following table summarizes the classification of the available-for-sale debt securities on our Consolidated Balance Sheets (in thousands):

	December 31, 2018		December 31, 2017
Cash and cash equivalents	$	5,064	$	25,968
Marketable securities	32,754		25,917
Total	$	37,818	$	51,885

Schedule of Available-for-Sale Securities by Contractual Maturity

The following table summarizes our portfolio of available-for-sale securities by contractual maturity (in thousands):

	December 31, 2018
	Amortized Cost		Estimated Fair Value
Less than one year	$	37,850	$	37,818
Greater than one year	—		—
Total	$	37,850	$	37,818