Fair Value Measurements

6 Months Ended

Jun. 30, 2015

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Fair Value of Financial Instruments

The following table presents the financial instruments that were measured at fair value on a recurring basis at June 30, 2015 by level within the fair value hierarchy (in thousands):



	June 30, 2015
	Level 1		Level 2		Level 3		Total
Money market funds	$	12,612	$	—	$	—	$	12,612
Common shares of CO2 Solutions	—		1,942		—		1,942
Total	$	12,612	$	1,942	$	—	$	14,554

The following table presents the financial instruments that were measured at fair value on a recurring basis at December 31, 2014 by level within the fair value hierarchy (in thousands):



	December 31, 2014
	Level 1		Level 2		Level 3		Total
Money market funds	$	14,602	$	—	$	—	$	14,602
Common shares of CO2 Solutions	—		688		—		688
Total	$	14,602	$	688	$	—	$	15,290

We estimated the fair value of our investment in 10,000,000 common shares of CO2 Solutions using the market value of common shares as determined by trading on the TSX Venture Exchange.