Annual report pursuant to Section 13 and 15(d)

Note 1 - The Company and Summary of Significant Accounting Policies (Details)

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Note 1 - The Company and Summary of Significant Accounting Policies (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Anti-dilutive securities 8,682,368 1,164,905
Exercise of common stock warrants    
Anti-dilutive securities 1,813,053 0
Conversion of preferred stock into common stock    
Anti-dilutive securities 1,163,659 1,163,659
Conversion of convertible debentures into common stock    
Anti-dilutive securities 5,704,543 0
Exercise of common stock options    
Anti-dilutive securities 1,113 1,246