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Note 14 - Employee Retirement Plan	12 Months Ended
Note 14 - Employee Retirement Plan	Dec. 31, 2019
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	1 4 . Employee Retirement Plan The Company sponsors an Employee Retirement Plan, generally available to all employees, in accordance with Section 401 (k) of the Internal Revenue Code. Employees may elect to contribute up to the Internal Revenue Service annual contribution limit. Under this Plan, at the discretion of the Company’s Board of Directors, the Company may match a portion of the employees’ contributions. The Company made no discretionary or matching contributions to the Plan for the year ended December 31, 2019 and year ended December 31, 2018.