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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2014
Stock Based Compensation [Abstract]  
Information with respect to stock options
Information with respect to stock options included within this plan is as follows:

  
No. of Shares
(in thousands)
  
Weighted
Average
Exercise Price
  
Aggregate
Intrinsic Value
(in thousands)
 
Outstanding at December 31, 2013
  
1,048
  
$
5.45
  
$
270
 
Options granted
  
417
   
5.15
     
Forfeited and cancelled
  
(225
)
  
5.16
     
Outstanding at December 31, 2014
  
1,240
  
$
5.28
  
$
1,264
 
Vested and expected to vest at December 31, 2014
  
1,192
  
$
5.28
  
$
1,215
 
Total shares exercisable as of December 31, 2014
  
344
  
$
5.60
  
$
344
 
Shares remaining available for grant
  
332
         
Assumptions for fair value of options at the date of the grant
The fair value of options at the date of the grant was estimated using the Black-Scholes model with the following assumptions for the respective period ending December 31:

  
2014
  
2013
 
     
Expected option life
 
5.9 years
  
4.6 years
 
Weighted average risk-free interest rate
  
1.7
%
  
1.3
%
Weighted average expected volatility
  
31
%
  
33
%
Expected dividend yield
  
0
%
  
0
%
Share-based compensation by exercise price range
For the years ended December 31, 2014 and 2013, the expected option life was based on the Company’s historical experience with similar type options.  Expected volatility is based on historical volatility levels of the Company’s common stock over the preceding period of time consistent with the expected life.  The risk-free interest rate is based on the implied yield currently available on U.S. Treasury zero coupon issues with a remaining term equal to the expected life.  Stock options outstanding at December 31, 2014 are summarized as follows:
 
Range of
Exercise Prices
  
Number
 Outstanding
(in thousands)
 
Weighted
Average
Remaining Life
 
Weighted
Average
Exercise Price
 
      
$
4.06 - $6.25
   
1,203
 
8.62 years
 
$
5.07
 
$
6.26 - $11.40
   
37
 
1.37 years
 
$
10.04
 
$
4.06 - $11.40
   
1,240
 
8.41 years
 
$
5.28
 
Activity with respect to non-vested stock options
Current year activity with respect to the Company’s non-vested restricted stock awards is as follows:

Non-vested shares (in thousands)
 
Shares
  
Weighted
Average grant-
date fair value
 
Balance at January 1, 2014
  
277
  
$
4.65
 
Granted
  
170
   
5.24
 
Vested
  
(112
)
  
4.23
 
Forfeited and cancelled
  
(62
)
  
3.46
 
Balance at December 31, 2014
  
273
  
$
4.68