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Note 13 - Subsequent Events | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Subsequent Events [Text Block] | NOTE 1 3 – SUBSEQUENT EVENTS In November 2018, the Company entered into an At Market Issuance Sales Agreement under which the Company could issue and sell shares of its common stock having an aggregate offering price of up to $25 million from time to time in an “at-the-market” offering (the “November 2018 ATM Offering”). From January 1, 2019, to February 28, 2019, the Company has issued 782,814 shares of common stock in the November 2018 ATM Offering for gross proceeds of $8.08 million and aggregate net proceeds of approximately $7.92 million. In March 2019, the Company entered into option agreements with parties holding 95% of its Convertible Senior Notes that allow the Company, at its sole option, at any time prior to December 5, 2019, to extend the maturity date of the Convertible Senior Notes to September 5, 2021

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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -URI http://asc.fasb.org/topic&trid=2122774 + Details
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