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Note 4 - Retirement Plan
12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Compensation and Employee Benefit Plans [Text Block]
4.
RETIREMENT PLAN
  
The Company has established a salary deferral plan under Section 
401
(k) of the Internal Revenue Code.  Such deferrals accumulate on a tax-deferred basis until the employee withdraws the funds.  The Company contributes up to
5%
of each eligible employee’s compensation.  Total retirement expense for the years ended
December 
31,
2019
 and
2018
 was approximately
$241,000
and
$239,000,
respectively.