Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2018

Available-for-sale Securities [Table Text Block]


(4)	Marketable Securities

Marketable securities as of June 30, 2018 and December 31, 2017 consisted of the following:



June 30, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market mutual funds	$	335	$	—	$	—	$	335
Total marketable securities designated as available-for-sale	$	335	$	—	$	—	$	335



December 31, 2017	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Money market mutual funds	$	7,318	$	—	$	—		$	7,318
Certificates of deposit	1,002		—		(1		)	1,001
Total marketable securities designated as available-for-sale	$	8,320	$	—	$	(1	)	$	8,319

Available-for-sale Securities, Debt Maturities, Amortized Cost And Fair Value Basis [Table Text Block]

The amortized costs and fair value of marketable securities as of June 30, 2018 and December 31, 2017 are shown below by effective maturity. Effective maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.



June 30, 2018	Amortized Cost		Fair Value
Due in less than one year	$	—	$	—
December 31, 2017	Amortized Cost		Fair Value
Due in less than one year	$	1,002	$	1,001

- 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.

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