This company has a float of 20 million shares and is 56.5% owned by insiders and 38.9% owned by institutions. The short interest is 2 million shares. Either institutions and/or insiders are allowing their shares to be shorted or there is alot of naked short selling going on here.
I'd love to invest in alternative energy but have gotten seriously burned by JPM and GS naked short selling before. Where is a regulator when you need one?