Note 16 - Subsequent Events	12 Months Ended
Dec. 31, 2012
Subsequent Events [Text Block]	16. Subsequent Events During the first quarter of 2013, the Company has embarked on a program to raise up to $3.8 million in convertible debt and already has raised $1.7 million through March 6, 2013. The Company anticipates that a significant portion of the total amount will come from strategic investors and a multinational corporation involved in clean energy. The structure of the financing consists of unsecured, subordinated, convertible promissory notes that mature on December 31, 2016, have a five percent annual interest rate, and are convertible into common stock of the Company at the rate of $0.23 per share. This conversion price represents an approximately 12% premium to the average closing price of the common stock during the period from February 1 to March 6, 2013. The terms of this financing are substantially the same as those the Company entered into on December 13, 2012 as part of its $1.5 million convertible debt issuance. The Company’s Board of Directors has approved this financing.

Note 16 - Subsequent Events

12 Months Ended

Dec. 31, 2012

16. Subsequent Events

During the first quarter of 2013, the Company has embarked on a program to raise up to $3.8 million in convertible debt and already has raised $1.7 million through March 6, 2013. The Company anticipates that a significant portion of the total amount will come from strategic investors and a multinational corporation involved in clean energy. The structure of the financing consists of unsecured, subordinated, convertible promissory notes that mature on December 31, 2016, have a five percent annual interest rate, and are convertible into common stock of the Company at the rate of $0.23 per share. This conversion price represents an approximately 12% premium to the average closing price of the common stock during the period from February 1 to March 6, 2013. The terms of this financing are substantially the same as those the Company entered into on December 13, 2012 as part of its $1.5 million convertible debt issuance. The Company’s Board of Directors has approved this financing.