Annual report pursuant to Section 13 and 15(d)

Joint Development Agreement with CO2 Solutions (Details)

v2.4.0.6
Joint Development Agreement with CO2 Solutions (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Dec. 15, 2009
Dec. 31, 2012
Joint Development Agreement with CO2 solutions (Textual) [Abstract]    
Recorded impairment in condensed consolidated statement of operations as sales, general and administrative expenses   $ 0
CO2 Solutions [Member]
   
Joint Development Agreement with CO2 solutions (Textual) [Abstract]    
Number of shares acquired in joint venture (shares) 10,000,000  
Percentage of common shares outstanding at the time of investment (percent) 16.60%  
Statutory resale restriction, expiry period (months) 4 months  
Statutory resale restriction, expiry date Apr. 15, 2010  
Expiration period of extended joint development agreement (months)   9 months
Recorded impairment in condensed consolidated statement of operations as sales, general and administrative expenses   $ 0.8
Expiration period of original joint development agreement   2011-01