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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table summarizes the impact on MRV's results of operations of recording share-based compensation for the three and nine months ended September 30, 2014, and 2013 (in thousands):

 
Three months ended
 
Nine months ended
 
September 30,
 
September 30,
 
2014
 
2013
 
2014
 
2013
Cost of goods sold
$
34

 
$
27

 
$
87

 
$
70

Product development and engineering
49

 
21

 
122

 
46

Selling, general and administrative
148

 
161

 
497

 
395

Total share-based compensation expense (1)
$
231

 
$
209

 
$
706

 
$
511

 
 
 
 
 
 
 
 

(1)
Income tax benefits realized from stock option exercises and similar awards were immaterial in both periods.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following weighted average assumptions were used for estimating the fair value of options granted during the nine months ended September 30, 2014 and the options modified during the nine months ended September 30, 2013, respectively.
 
 
 
Nine months ended September 30,
2014
2013
Risk-free interest rate
2.0
%
1.2
%
Dividend yield (1)
—

—

Volatility
51
%
52
%
Expected life (in years)
5.9

5.7

 
 
 


(1)
As the Company does not pay a dividend on a regular basis, and dividends paid in the past have been special in nature, a dividend rate of zero was used.