Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation - Restricted Stock Activity (Details)

v2.4.0.8
Stock-based compensation - Restricted Stock Activity (Details) (Restricted stock, USD $)
3 Months Ended
Mar. 31, 2014
Tecogen
 
Unvested Restricted Stock [Roll Forward]  
Unvested, Beginning (shares) 361,570
Granted (shares) 0
Vested (shares) 0
Forfeited (shares) 0
Unvested, Ending (shares) 361,570
Weighted Average Grant Date Fair Value [Roll Forward]  
Unvested, Beginning (usd per share) $ 1.31
Granted (usd per share) $ 0.00
Vested (usd per share) $ 0
Forfeited (usd per share) $ 0.00
Unvested, Ending (usd per share) $ 1.31
Ilois
 
Unvested Restricted Stock [Roll Forward]  
Unvested, Beginning (shares) 310,000
Granted (shares) 0
Vested (shares) 0
Forfeited (shares) 0
Unvested, Ending (shares) 310,000
Weighted Average Grant Date Fair Value [Roll Forward]  
Unvested, Beginning (usd per share) $ 0.10
Granted (usd per share) $ 0.00
Vested (usd per share) $ 0.00
Forfeited (usd per share) $ 0.00
Unvested, Ending (usd per share) $ 0.10