Note 15 - Employee 401(k) Plan

12 Months Ended

Dec. 31, 2017

Notes to Financial Statements

Pension and Other Postretirement Benefits Disclosure [Text Block]

1

5

.  

EMPLOYEE

401

(k)

PLAN

The Compa

ny sponsors a

401

(k) retirement savings plan for all employees in the United States who meet certain eligibility requirements. Participants

may

contribute up to the amount allowable as a deduction for federal income tax purposes. The Company is

not

required to contribute and did

not

contribute to the plan for the years ended

December 31, 2017,

2016

and

2015.