3. Cash Equivalents and Restricted Cash and Securities

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



			Unrealized		Estimated
			Holding		Market
December 31, 2014	Cost Basis		Gains (Losses)		Value
Cash equivalents:
Money market funds	$	18,213	$	--	$	18,213
Restricted cash and securities:
Cash		5,000		--		5,000
Money market funds		884		--		884

December 31, 2013
Cash equivalents:
Money market funds	$	5,349	$	--	$	5,349
Certificates of deposit		749		--		749
Restricted cash and securities:
Cash		5,000		--		5,000
Money market funds		350		--		350

As of December 31, 2014 and 2013 $884,000 and $350,000, respectively, of the Company’s 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. As of December 31, 2014 $5.0 million of the Company’s cash was designated as long-term restricted cash due to a financial covenant requirement under the Company’s credit agreement with General Electric Capital Corporation (“GE Capital”) as discussed in Note 12. This restriction lapses upon expiration of the credit agreement with GE Capital on September 26, 2019. As of December 31, 2013 $5.0 million of the Company’s cash was designated as short-term under the Company’s credit agreement with GE Capital prior to the September 26, 2014 amendment.

There were no gross realized gains or losses on cash equivalents or restricted securities for the years ended December 31, 2014, 2013, and 2012. At December 31, 2014 and 2013 $5.0 million of the Company’s restricted cash had no maturity date. At December 31, 2014 $622,000 of the Company’s restricted securities had a maturity date within three months and $262,000 had a maturity date between three months and one year. At December 31, 2013 $328,000 of the Company’s restricted securities had a maturity date within three months and $22,000 of the Company’s restricted securities had a maturity date between three months and one year.