Annual report pursuant to Section 13 and 15(d)

Fair Value (Textual) (Details)

v2.4.0.6
Fair Value (Textual) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair Value (Textual) [Abstract]    
Investment impairment recorded $ 0  
CO2 Solutions [Member]
   
Fair Value (Textual) [Abstract]    
Number of common shares fair value (shares) 10,000,000  
Estimated fair value of investment in common stock 600,000 1,200,000
Unrealized loss on investment 47,000 155,000
Investment impairment recorded 800,000  
Gain (loss) on investments, tax expense $ 69,000 $ 0