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Note 9 - Stock-based Compensation Expense
9 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
NOTE
9:
     STOCK-BASED COMPENSATION EXPENSE
 
During the
three
and
nine
months ended
September 30, 2018
and
September 30, 2017,
the Company recorded compensation expense as part of selling and general administrative expense, of approximately
$280,000
and
$242,000
and
$704,000
and
$678,000,
respectively, for the cost of employee and director services received in exchange for equity instruments based on the grant-date fair value of those instruments. This expense was recorded based upon the guidance of ASC
718,
“Compensation-Stock Compensation.”