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Note 16 - Subsequent Events | 12 Months Ended
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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.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
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