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Shareholders Equity (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 19, 2021
USD ($)
shares
Jun. 11, 2021
shares
Apr. 20, 2020
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
$ / shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
$ / shares
Dec. 31, 2020
$ / shares
shares
May 27, 2021
USD ($)
item
$ / shares
shares
Apr. 24, 2020
shares
Apr. 19, 2020
$ / shares
shares
Jan. 31, 2017
Common shares                        
Reverse stock split ratio     50                  
Common shares, shares authorized     16,000,000 32,000,000   32,000,000   32,000,000   32,000,000 800,000,000  
Fractional common shares issued     0                  
Common shares, par value (in dollars per share) | $ / shares     $ 0.05 $ 0.05   $ 0.05   $ 0.05     $ 0.001  
Common stock shares authorized increase percentage     100.00%                  
Common stock shares authorized amount | $     $ 1,600,000                  
Shares issued in connection with acquisition of carbon capture and hydrogen technologies 147,974                      
Value of shares issued in connection with acquisition of carbon capture and hydrogen technologies | $ $ 12,900,000     $ 12,872,000   $ 12,872,000            
Number of shares that are forfeitable if certain milestones are not achieved over the next two years 71,280                      
Preferred stock, rate (as a percent)           6.00%   6.00%        
Preferred shares, par value (in dollars per share) | $ / shares       $ 0.001   $ 0.001   $ 0.001        
Preferred stock, liquidation preference (in dollars per share) | $ / shares       $ 50   50   $ 50        
Preferred Stock, Dividends Per Share, Declared | $ / shares         $ 0.75 $ 0.75 $ 2.25          
Number of right share for each outstanding common share                 1      
Number of warrants received per common share held   0.40                    
Number of warrants issued   3,200,000                    
Exercise price (in dollars per share) | $ / shares                 $ 166.66667      
Number of additional securities                 0.333      
Multiplying factor for exercise of warrants | item                 3      
Percentage volume weighted average price of stock times factor must exceed sum of volume weighted average prices of second, third and fourth days before exercise                 6.00%      
Conversion price percentage                 95.00%      
Fair value of the Warrants | $       $ 100,000   $ 100,000     $ 2,700,000      
Gain for the decrease in liability | $           $ 2,600,000            
Preferred stock, shares outstanding       0   0   4,870,000        
5.10% senior notes due September 2023                        
Common shares                        
Interest rate (as a percent)       5.10%   5.10%            
0.75% senior exchangeable notes due January 2024                        
Common shares                        
Interest rate (as a percent)       0.75%   0.75%           0.75%
5.75% senior notes due February 2025                        
Common shares                        
Interest rate (as a percent)       5.75%   5.75%            
7.25% senior notes due January 2026                        
Common shares                        
Interest rate (as a percent)       7.25%   7.25%            
Minimum                        
Common shares                        
Reverse stock split ratio     15                  
Maximum                        
Common shares                        
Reverse stock split ratio     50                  
Common Stock                        
Common shares                        
Shares issued in connection with acquisition of carbon capture and hydrogen technologies       148   148            
Value of shares issued in connection with acquisition of carbon capture and hydrogen technologies | $       $ 7,000   $ 7,000