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Note 7 - Preferred Stock | 12 Months Ended
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Dec. 31, 2016
Notes to Financial Statements |
Preferred Stock [Text Block] | 7 . Preferred Stock Series A Convertible Preferred Stock During 2014, 71 shares of our Series A Convertible Preferred Stock, $1,000 stated value (“Series A Preferred Stock”), were converted into 202,857 shares of common stock. As of December 31, 2016, there were no shares of Series A Preferred Stock outstanding. Series B Convertible Preferred Stock Our Series B Convertible Preferred Stock, $1,000 stated value (“Series B Preferred Stock”), has rights and privileges as set forth in the pertinent Certificate of Designation of Preferences, Rights and Limitations, including a liquidation preference equal to the stated value per share. The Series B Preferred Stock has no voting rights and is not entitled to a dividend. During 2014, 1,550 shares of Series B Preferred Stock were converted into 4,428,571 shares of common stock. As of December 31, 2016, there were 100 shares of Series B Preferred Stock outstanding, convertible at any time at the option of the holder into 285,714 shares of common stock. Series C Convertible Preferred Stock In February 2015, we issued 3,000 shares of our Series C Convertible Preferred Stock, $1,000 stated value (“Series C Preferred Stock”), and warrants to purchase up to an aggregate of 51,333,331 shares of our common stock for total net proceeds of $2,679,810. We allocated $1,695,869 of the purchase price to the fair value of the warrants issued in the transaction (recorded to Additional Paid-in Capital), and recorded the net amount of $983,941 as the initial carrying value of the Series C Preferred Stock. The Series C Preferred Stock has rights and privileges as set forth in the pertinent Certificate of Designation of Preferences, Rights and Limitations, including a liquidation preference equal to the stated value per share. The Series C Preferred Stock has no voting rights and is not entitled to a dividend. The Series C Preferred Stock is convertible at any time at the option of the holders into shares of our common stock, and contains price adjustment provisions which may, under certain circumstances, reduce the conversion price if we sell, or grant options to purchase, our common stock at a price lower than the then conversion price of the Series C Preferred Stock. During 2016, 132 shares of Series C Preferred Stock were converted into 1,400,000 shares of common stock. As of December 31, 2016, there were 2,868 shares of Series C Preferred Stock outstanding, convertible into 57,363,520 shares of common stock.

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- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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