Cash Equivalents And Restricted Cash And Securities

3 Months Ended

Mar. 31, 2019

Cash Equivalents And Restricted Cash And Securities [Abstract]

Cash Equivalents And Restricted Cash And Securities

3. Cash Equivalents and Restricted Securities

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


			Unrealized		Estimated
			Holding		Market
March 31, 2019	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	1,450	$	--	$	1,450
Restricted securities:
Money market funds		731		--		731

			Unrealized		Estimated
			Holding		Market
December 31, 2018	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	1,445	$	--	$	1,445
Restricted securities:
Money market funds		747		--		747

As of March 31, 2019 and December 31, 2018 $731,000 and $747,000, respectively, all 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 months ended March 31, 2019 and 2018. As of March 31, 2019 $731,000 of our restricted securities had a maturity date within three months. As of December 31, 2018 $512,000 of our restricted securities had a maturity date within three months and $235,000 had a maturity date between three months and one year.