Marketable Securities Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2018

Available-for-sale Securities [Table Text Block]

The schedule of maturities at March 31, 2018 and December 31, 2017 is as follows:

Note D – Marketable Securities (continued)



	Maturities as of March 31, 2018				Maturities as of December 31, 2017
	1 Year or Less		1 to 4 Years		1 Year or Less		1 to 4 Years
Corporate bonds	$	13,077	$	20,507	$	11,979	$	29,523
Certificates of deposit	41,592		—		52,048		—
Total	$	54,669	$	20,507	$	64,027	$	29,523

- 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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