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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of impact on results of operations of recording share-based compensation
The following table summarizes the impact on MRV's results of operations of recording share-based compensation for the three and six months ended June 30, 2017 and 2016 (in thousands):
 
 
Three months ended
 
Six months ended
 
 
June 30,
 
June 30,
 
 
2017
 
2016
 
2017
 
2016
Cost of goods sold
 
$
21

 
$
28

 
$
36

 
$
70

Product development and engineering
 
39

 
63

 
98

 
139

Selling, general and administrative
 
329

 
259

 
670

 
488

Total share-based compensation expense (1)
 
$
389

 
$
350

 
$
804

 
$
697


(1)
Income tax benefits realized from stock option exercises and similar awards were immaterial in all periods.
Valuation Assumptions for Fair value of Options
The following weighted average assumptions were used for estimating the fair value of options granted during the six months ended June 30, 2017 and 2016:
Six Months Ended June 30:
 
2017
 
2016
Risk-free interest rate
 
1.9
%
 
1.4
%
Dividend yield (1)
 
—

 
—

Volatility
 
48
%
 
46
%
Expected life (in years)
 
5.8

 
5.9


(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.