Cash Equivalents And Restricted Securities

9 Months Ended

Sep. 30, 2018

Cash Equivalents And Restricted Securities [Abstract]

Cash Equivalents And Restricted Securities

3. Cash Equivalents and Restricted Securities

The following is a summary of cash equivalents and restricted securities (in thousands):


			Unrealized		Estimated
			Holding		Market
September 30, 2018	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	1,237	$	--	$	1,237
Restricted securities:
Money market funds		753		--		753

			Unrealized		Estimated
			Holding		Market
December 31, 2017	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	372	$	--	$	372
Restricted securities:
Money market funds		776		--		776

As of September 30, 2018 and December 31, 2017 $753,000 and $776,000, respectively, of our money market funds were designated as short-term restricted securities due to a contractual commitment to hold the securities as pledged collateral relating primarily to international tax obligations.

There were no gross realized gains or losses on cash equivalents in the three and nine months ended September 30, 2018 and 2017. As of September 30, 2018 $231,000 of our restricted securities had a maturity date within three months and $522,000 of our restricted securities had a maturity date between three months and one year. As of December 31, 2017 $537,000 of our restricted securities had a maturity date within three months and $239,000 had a maturity date between three months and one year.