Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

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

Summary of financial instruments measured at fair value on a recurring basis

The following table presents the financial instruments that were measured at fair value on a recurring basis at June 30, 2014 by level within the fair value hierarchy (in thousands):

	June 30, 2014
	Level 1		Level 2		Level 3		Total
Money market funds	$	15,598	$	—	$	—	$	15,598
Common shares of CO2 Solutions	—		1,453		—		1,453
Total	$	15,598	$	1,453	$	—	$	17,051

The following table presents the financial instruments that were measured at fair value on a recurring basis at December 31, 2013 by level within the fair value hierarchy (in thousands):

	December 31, 2013
	Level 1		Level 2		Level 3		Total
Money market funds	$	16,089	$	—	$	—	$	16,089
Corporate bonds	—		1,005		—		1,005
U.S. Treasury obligations	—		2,000		—		2,000
Common shares of CO2 Solutions	—		795		—		795
Total	$	16,089	$	3,800	$	—	$	19,889

Disclosure of Long Lived Assets Held-for-sale

The fair value of assets held for sale at June 30, 2014, measured on a nonrecurring basis, is as follows (in thousands):

	June 30, 2014
	Level 1		Level 2		Level 3		Total
Assets held for sale	$	—	$	—	$	292	$	292

The fair value of assets held for sale at December 31, 2013 , measured on a nonrecurring basis, is as follows (in thousands):

	December 31, 2013
	Level 1		Level 2		Level 3		Total
Assets held for sale	$	—	$	—	$	2,179	$	2,179

Total assets reclassified as Assets Held for Sale at June 30, 2014, were (in thousands):

Assets Held for Sale	Adjusted Carrying Value
Research & development equipment classified as held for sale at December 31, 2013	$	2,179
Hungarian assets sold for the three months ended March 31, 2014	(779		)
U.S. assets sold for the three months ended March 31, 2014	(6		)
Research & development equipment classified as held for sale at March 31, 2014	$	1,394
Research & development equipment reclassified as held for use	(333		)
U.S. assets sold for the three months ended June 30, 2014	(13		)
Loss on exchange of assets	(188		)
Change in estimated fair value of research equipment during three months ended June 30, 2014	(568		)
Research & development equipment classified as held for sale at June 30, 2014	$	292