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Note 9 - Stock-based Compensation
 9 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Shareholders' Equity and Share-based Payments [Text Block]
9.
Stock-based Compensation
 
Employee Stock Option Plans
 
The Company’s share-based incentive plans offering stock options are offered under the Company’s
2007
Equity Incentive Plan (the
“2007
Plan”), which was restated and approved by the shareholders on
December 12, 2015.
Provisions of the restated
2007
Plan include the granting of up to
2,000,000
incentive and non-qualified stock options, stock appreciation rights, restricted stock and restricted stock units. Options
may
be granted to employees, officers, non-employee directors and other service providers and
may
be granted upon such terms as the Compensation Committee of the Board of Directors determines in their sole discretion. As of
September 30, 2019,
there were
549,011
options outstanding under the
2007
Plan. As of
September 30, 2019,
the
2007
Plan had
946,083
authorized unissued options.
 
A summary of the stock option activity under the Company’s plans for the Nine months ended
September 30, 2019
is as follows:
 
   
Number
of shares
    
Weighted
average
exercise
price
  
                 
Options outstanding at beginning of year
    
624,256
     $
8.87
  
Granted
    
—
      
—
  
Less:
                
Exercised
    
—
      
—
  
Forfeited prior to vesting
    
(574
)
    
11.97
  
Canceled or expired
    
(74,671
)
    
7.66
  
Options outstanding at September 30, 2019
    
549,011
      
9.03
  
Options exercisable at end of September 30, 2019
    
520,286
     $
8.96
  
 
As of
September 30, 2019,
the total remaining unrecognized compensation cost related to non-vested stock options, net of forfeitures, was approximately
$90,
which will be recognized over a weighted average period of
0.6
year. The total intrinsic value of options outstanding as of
September 30, 2019
was
$0.
 
Stock-based compensation expense has been recorded as follows:
 
   
Three months ended
September 30,
    
Nine months ended
September 30,
  
   
2019
    
2018
    
2019
    
2018
  
Cost of goods sold
   $
2
     $
3
     $
6
     $
12
  
Sales and marketing
    
—
      
8
      
1
      
28
  
Research and product development
    
11
      
23
      
34
      
81
  
General and administrative
    
35
      
78
      
136
      
258
  
    $
48
     $
112
     $
177
     $
379