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Basis of Presentation (Detail Textuals)
6 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
USD ($)
Dec. 31, 2012
USD ($)
Apr. 19, 2013
Hypulsion Sas Joint Venture
Feb. 29, 2012
Axane
Apr. 19, 2013
Axane, S.A. ("Axane")
Hypulsion Sas Joint Venture
USD ($)
Apr. 19, 2013
Axane, S.A. ("Axane")
Hypulsion Sas Joint Venture
EUR (€)
May 08, 2013
Securities Purchase Agreement
Air Liquide
Series C Redeemable Convertible Preferred Stock
USD ($)
May 08, 2013
Securities Purchase Agreement
Air Liquide
Series C Redeemable Convertible Preferred Stock
EUR (€)
Apr. 19, 2013
Engineering Service Agreement
Hypulsion Sas Joint Venture
USD ($)
Apr. 19, 2013
Engineering Service Agreement
Hypulsion Sas Joint Venture
EUR (€)
Jun. 30, 2013
Common stock warrants
Feb. 20, 2013
Common stock warrants
May 31, 2011
Common stock warrants
Jun. 30, 2013
Common stock warrants
Dec. 31, 2012
Common stock warrants
Class of Warrant or Right [Line Items]                              
Risk-free interest rate                     1.20% 0.85% 0.75% 0.46% 0.31%
Volatility of market price                     101.80% 102.00% 94.40% 108.50% 73.50%
Expected average term of warrant                     4 years 7 months 6 days 5 years 2 years 6 months 2 years 6 months 2 years 6 months
Percentage of contribution in the JV by Axane       55.00% 25.00% 25.00%                  
Percentage of contribution in the JV by company       45.00%                      
Cash purchase price joint venture interest sale $ 3,234,717       $ 3,300,000 € 2,500,000                  
Total percentage of holding     20.00%   80.00% 80.00%                  
Percentage of profit sharing in joint venture     20.00%                        
Percentage of right to purchase interest in joint venture in 2018 at a formula price         60.00% 60.00%                  
Percentage of right to purchase interest in joint venture at a formula price at any time between February 1, 2018 and December 31, 2021         20.00% 20.00%                  
Cash paid for services to be performed                 659,000 500,000          
Number of shares agreed to issue and sell to Air Liquide 10,431 0         10,431 10,431              
Convertible preferred stock, par value (in dollars per share) $ 0.01 $ 0.01         $ 0.01                
Aggregate purchase price for agreement             $ 2,595,400 € 2,000,000