Cash Equivalents, Marketable Securities and Other Investments

At December 31, 2013, cash equivalents, marketable securities and other investments consisted of the following (in thousands):



	December 31, 2013
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Average Contractual Maturities
									(in days)
Money market funds	$	16,089	$	—	$	—	$	16,089	n/a
Corporate bonds	1,002		3		—		1,005		140
U.S. Treasury obligations	2,000		—		—		2,000		59
Common shares of CO2 Solutions	563		232		—		795		n/a
Total	$	19,654	$	235	$	—	$	19,889

The total cash and cash equivalents balance of $22,130,000 as of December 31, 2013 was comprised of money market funds of $16,089,000 and cash of $6,041,000 held with major financial institutions worldwide. At December 31, 2013, the Company had no marketable security in an unrealized loss position.

At December 31, 2012, cash equivalents, marketable securities and other investments consisted of the following (in thousands):



	December 31, 2012
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Average Contractual Maturities
									(in days)
Money market funds	$	24,789	$	—	$	—	$	24,789	n/a
Commercial paper	1,499		1		—		1,500		70
Corporate bonds	9,512		10		—		9,522		156
U.S. Treasury obligations	5,511		5		—		5,516		262
Common shares of CO2 Solutions	563		47		—		610		n/a
Total	$	41,874	$	63	$	—	$	41,937

The total cash and cash equivalents balance of $32,003,000 as of December 31, 2012 was comprised of money market funds of $24,789,000 and $7,214,000 held as cash primarily with major financial institutions in North America. At December 31, 2012, the Company had no marketable security in an unrealized loss position.