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Note 11 - Per Share Data	6 Months Ended	12 Months Ended
Note 11 - Per Share Data	Jun. 30, 2018	Dec. 31, 2017
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 10 - PER SHARE DATA The computation of basic earnings (loss) per share of common stock is based on the weighted average number of shares outstanding during the year. The computation of diluted earnings per common share is based on the weighted average number of shares outstanding during the year plus the common stock equivalents that would arise from the exercise of stock options and warrants outstanding under the treasury method and the average market price per share during the year as well as the conversion of notes. At June 30, 2018, the weighted average shares outstanding excluded options to purchase 61,050,122 shares of common stock of the Company, warrants to purchase 24,813,373 shares of common stock of the Company and 94,413,680, shares of common stock of the Company issuable upon the conversion of notes because their effect would be anti-dilutive. At June 30, 2017, the weighted average shares outstanding excluded options to purchase 21,897,479 shares of common stock of the Company, warrants to purchase 3,744,623 shares of common stock of the Company and 40,677,826 shares of common stock of the Company issuable upon the conversion of notes payable because their effect would be anti-dilutive.	NOTE 11 - PER SHARE DATA The computation of basic earnings (loss) per share of common stock is based on the weighted average number of shares outstanding during the year. The computation of diluted earnings per common share is based on the weighted average number of shares outstanding during the year plus the common stock equivalents that would arise from the exercise of stock options and warrants outstanding under the treasury method and the average market price per share during the year as well as the conversion of notes. At December 31, 2017, the weighted average shares outstanding excluded options to purchase 57,057,768 shares of common stock of the Company, warrants to purchase 18,813,373 shares of common stock of the Company and 94,546,696, shares of common stock of the Company issuable upon the conversion of notes because their effect would be anti-dilutive. At December 31, 2016, the weighted average shares outstanding excluded options to purchase 21,277,479 shares of common stock of the Company, warrants to purchase 3,744,623 shares of common stock of the Company and 40,060,395 shares of common stock of the Company issuable upon the conversion of notes payable because their effect would be anti-dilutive..