Basis of Presentation and Summary of Significant Accounting Policies (Textual) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) operating_segment reporting_unit	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Accounting Policies [Abstract]
Maturity Date of Highly Liquid Investments			3 months
Cash and Cash Equivalents, at Carrying Value	$ 16,598,000	$ 20,090,000	$ 16,598,000	$ 20,090,000	$ 26,487,000	$ 22,130,000
Cash	4,000,000		4,000,000
Money market funds	12,600,000		$ 12,600,000
Number of Operating Segments | operating_segment			1
Number of Reportable Segments | reporting_unit			1
Goodwill Impairment					0
Benefit from income taxes	(430,000)	$ (437,000)	$ (418,000)	$ (567,000)
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	1,379,000		1,379,000		125,000
Common shares of CO2 Solution [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	$ 1,379,000		$ 1,379,000		$ 125,000