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Note 14 - Subsequent Event	12 Months Ended
	Dec. 31, 2015
Notes to Financial Statements
Subsequent Events [Text Block]	14 . Subsequent Events During January and February 2016, we issued an aggregate of 1,400,000 shares of our common stock related to conversions of our Series C Preferred Stock. On February 15, 2016, we entered into an agreement with certain warrant holders (the “Holders”) with respect to amending the terms of our Series E Warrants. Pursuant to the agreement, we agreed to extend the term of the Series E Warrants to August 27, 2016, and we agreed to the payment to each Holder of a warrant exercise fee of $0.02916 per share for each share purchased upon exercise of the Series E Warrants. The Holders agreed to promptly exercise an aggregate of 3,664,588 Series E Warrants, for which we received $238,198 in total net proceeds (after deduction of the warrant exercise fee). We recorded non-cash general and administrative expense of $469,800 associated with the warrant modifications.

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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.

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