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Note 9 - Stock Option and Stock Plans
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
9
. Stock Option and Stock Plans
 
Stock Plans *
 
Issue Date Range
 
 
Total Shares
Authorized
 
 
Share
s
Issued
 
 
Shares
Remaining
 
2008 Stock Incentive Plan
 
5/23/08 
10/11/11
     
600,000
     
463,420
     
136,580
 
 
*     The Board of Directors has approved all stock, stock option and stock warrant issuances.