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Investment in ClearSign (Details Textual) (USD $)	9 Months Ended		1 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Apr. 25, 2012 Clearsign Combustion Corporation [Member]	Apr. 20, 2011 Clearsign Combustion Corporation [Member]	Sep. 30, 2012 Clearsign Combustion Corporation [Member]	Apr. 24, 2012 Clearsign Combustion Corporation [Member]
Equity Method Investments Shares Acquired				363,636
Equity Method Investment, Aggregate Cost				$ 1,000,000
Equity Method Investments Per Share Value Of Shares Acquired				$ 2.75
Stock Issued During Period, Value, Private Offering Issues				3,000,000
Stockholders' Equity Note, Stock Split, Conversion Ratio					1.25
Equity Method Investments Shares Acquired After Stock Split					454,545
Equity Method Investment, Ownership Percentage	20.00%				20.00%
Sale of Stock, Number of Shares Issued in Transaction			3,000,000
Sale of Stock, Price Per Share			$ 4
Common Stock Dividend Declared						450,000
Common Stock Dividend Rate Percentage						$ 0.05513475
Shares Issuable For One Share Of Equity Method Investee						18,137
Common Stock Dividends, Shares					450,952
Common Stock Dividend Rounding Shares	952
Equity Method Investment, Realized Gain (Loss) on Disposal					811,713
Equity Method Investment Measured Cost Basis			1,803,808
Equity Method Investment Shares Retained After Dividend Distribution					3,539
Equity Method Investment Value Retained After Dividend Distribution					25,295
Available-for-sale Securities, Gross Unrealized Gains	$ 29,655	$ 12,787			$ 934

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