Quarterly report pursuant to Section 13 or 15(d)

Subsequent events (Details)

v2.4.0.8
Subsequent events (Details) (USD $)
0 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Mar. 31, 2014
Chief Executive Officer (John N. Hatsopoulos)
Mar. 26, 2014
Chief Executive Officer (John N. Hatsopoulos)
Oct. 03, 2013
Demand notes
Chief Executive Officer (John N. Hatsopoulos)
Nov. 30, 2012
Demand notes
Chief Executive Officer (John N. Hatsopoulos)
Sep. 07, 2011
Demand notes
Chief Executive Officer (John N. Hatsopoulos)
Sep. 10, 2008
Demand notes
Chief Executive Officer (John N. Hatsopoulos)
Sep. 24, 2001
Convertible debentures
Chief Executive Officer (John N. Hatsopoulos)
Sep. 24, 2001
Convertible debentures
Member of board of directors
Oct. 18, 2013
Convertible debentures
Common stock
Dec. 31, 2012
Convertible debentures
Common stock
Oct. 18, 2013
Conversion of Accrued Interest Amount in 2012 [Member]
Convertible debentures
Member of board of directors
Sep. 30, 2012
Conversion of accrued interest
Convertible debentures
Oct. 18, 2013
Conversion of accrued interest
Convertible debentures
Member of board of directors
Sep. 24, 2011
Conversion of accrued interest
Convertible debentures
Member of board of directors
May 11, 2009
Conversion of accrued interest
Convertible debentures
Member of board of directors
Subsequent Event [Line Items]                              
Principal amount     $ 450,000 $ 300,000 $ 750,000 $ 250,000 $ 100,000 $ 200,000              
Related party debt, stated interest rate     6.00% 6.00% 6.00% 5.00%                  
Debt conversion, amount converted                 90,967     6,100   72,960 90,967
Debt conversion, number of shares issued                 75,806     85,242      
Current portion of convertible debentures, related party                     6,913   4,367    
Common stock issuable upon conversion                   555,556 2,161   970    
Maximum borrowing capacity $ 1,500,000 $ 3,500,000                          
Conversion price in usd per share                 $ 1.20   $ 3.20   $ 4.50