Quarterly report pursuant to Section 13 or 15(d)

Note 16 - Supplemental Disclosure for Statements of Cash Flows (Details Textual)

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Note 16 - Supplemental Disclosure for Statements of Cash Flows (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Interest Paid, Excluding Capitalized Interest, Operating Activities $ 4,000 $ 3,000
Stock Issued During Period, Shares, Employee Benefit Plan   4,734
Issuance of Stock to Defined Contribution Plan for Employer Matching Contribution $ 35,980