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Note 14 - Employee Benefit Plan	12 Months Ended
Note 14 - Employee Benefit Plan	Dec. 31, 2018
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	1 4 . Employee Benefit Plan The Company has established a 401 (k) tax-deferred savings plan (the “Plan”) which permits participants to make contributions by salary deduction pursuant to Section 401 (k) of the Internal Revenue Code of 1986, as amended. The Company may, at its discretion, make matching contributions to the Plan. Furthermore, the Company is responsible for administrative costs of the Plan. The Company accrued $1,800 contribution to the Plan for the year ended December 31, 2018. The Company accrued $1,137 contribution to the Plan for the year ended December 31, 2017. The Company accrued $2,625 contribution to the Plan for the year ended December 31, 2016.