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Note 7 - Stock-based Compensation
 3 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Shareholders' Equity and Share-based Payments [Text Block]
7.
     
.
STOCK-BASED COMPENSATION
 
We recorded non-cash stock compensation expense in each period as follows:
 
   
Three-Month Periods E
nded
  
   
March 31,
    
April 1,
  
   
2019
    
2018
  
Stock Options
   $
174
     $
123
  
Restricted Stock Grants
    
11
      
16
  
Total
   $
185
     $
139
  
 
We have stock options outstanding from various stock-based employee compensation plans for which we record compensation cost relating to share-based payment transactions in our financial statements. As of
March 31, 2019,
there was
$372
of total unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted average period of
0.8
years.
 
The following table summarizes stock option activity for the
three
-month period ended
March 31, 2019:
 
   
Number of
Shares
    
Weighted
Average
Exercise
Price
    
Weighted
Average
Remaining
Contractual
Term (years)
    
Aggregate
Intrinsic
Value
  
Outstanding at January 1, 2019
    
1,576,087
     $
6.58
      
 
      
 
  
Granted
    
-
      
-
      
 
      
 
  
Exercised
    
(75,427
 )    
4.71
      
 
      
 
  
Forfeited or Expired
    
-
      
-
      
 
      
 
  
Outstanding at March 31, 2019
    
1,500,660
     $
6.68
      
3.25
     $
5,574
  
Vested and Expected to Vest at March 31, 2019
    
1,409,243
     $
6.65
      
3.12
     $
5,280
  
Exercisable at March 31, 2019
    
1,031,701
     $
5.98
      
2.47
     $
4,377
  
 
Cash received from stock option exercises under our stock-based compensation plans for the
three
-month periods ended
March 31, 2019
and
April 1, 2018
was
$356
and
$939,
respectively.
 
In
January 2018,
17,500
shares of restricted stock were awarded to certain of our employees. These shares vest in equal annual installments over
three
years. The weighted average grant date fair value of these awards was
$7.16
per share. Unrecognized compensation cost related to these restricted shares was
$42
at
March 31, 2019.