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Note 10 - 401(k) Retirement Benefit Plan
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Pension and Other Postretirement Benefits Disclosure [Text Block]
Note
10
-
401(k)
Retirement Benefit Plan
 
We maintain a defined contribution
401(k)
plan covering substantially all employees. Employees can contribute a portion of their salary or wages as prescribed under Section
401(k)
of the Internal Revenue Code and, subject to certain limitations, we
may,
at the discretion of our Board of Directors, authorize an employer contribution based on a portion of the employees' contributions. Since
January
2010,
we have matched
50%
on the
first
4%
contributed by an employee, or a maximum of
2%
of the employee’s income. For
2016
and
2015,
we contributed
$191
and
$201,
respectively, to the
401(k)
plan.