Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stockholders' Equity (Details Textual)

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Note 10 - Stockholders' Equity (Details Textual) - shares
Sep. 30, 2018
Dec. 31, 2017
Common Stock, Capital Shares Reserved for Future Issuance 5,300,854 5,111,582
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance 1,909,175 1,401,247
Other Stock Options and Warrants [Member]    
Common Stock, Capital Shares Reserved for Future Issuance 3,518,668 3,710,335
Chief Executive Officer, Chief Financial Officer and Employees [Member]    
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance 1,909,175 1,401,247