Cash Equivalents and Marketable Securities

6 Months Ended

Jun. 30, 2016

Cash Equivalents and Marketable Securities [Abstract]

Cash Equivalents and Marketable Securities

Cash Equivalents and Marketable Securities

Cash equivalents and marketable securities classified as available-for-sale at June 30, 2016 and at December 31, 2015 consisted of the following (in thousands):

	June 30, 2016
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Average Contractual Maturities
									(in days)
Money market funds (1)	$	11,141	$	—	$	—	$	11,141	n/a
Common shares of CO2 Solutions (2)	563		552		—		1,115		n/a
Total	$	11,704	$	552	$	—	$	12,256

	December 31, 2015
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Average Contractual Maturities
									(in days)
Money market funds (1)	$	11,120	$	—	$	—	$	11,120	n/a
Common shares of CO2 Solutions (2)	563		986		—		1,549		n/a
Total	$	11,683	$	986	$	—	$	12,669

(1) Money market funds are classified in cash and cash equivalents on our condensed consolidated balance sheets.

(2) Common shares of CO2 Solutions are classified in marketable securities on our condensed consolidated balance sheets.

There were no marketable securities in an unrealized loss position at June 30, 2016 or at December 31, 2015.