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STOCK-BASED COMPENSATION (Tables)
3 Months Ended
Mar. 31, 2013
STOCK-BASED COMPENSATION  
Schedule of principal assumptions used in applying the Black-Scholes option pricing model for the awards

 

 

 

 

March 31, 2013

 

March 31, 2012

 

Risk-free interest rate

 

 

0.97%

 

Dividend yield

 

 

n/a

 

Volatility factor of the expected market price of common stock

 

 

75%

 

Weighted-average expected life of option

 

 

6.0 years

 

Weighted-average grant date fair value

 

 

$3.80