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Stock-Based Compensation
6 Months Ended
Jun. 30, 2011
Stock-Based Compensation [Abstract]  
Stock-Based Compensation
Note 4  
- Stock-Based Compensation
The Company follows the guidance in FASB ASC Topic 718, “Compensation — Stock Compensation", (“ASC 718”). The Company issued 997,250 and 1,930,917 stock options in the three months and six months ended June 30, 2011, respectively. The Company issued 110,000 shares of restricted stock in the three months ended March 31, 2011. The Company did not issue any shares of restricted stock in the three months ended June 30, 2011. In the three and six months ended June 30, 2010, the Company issued 52,419 and 128,318 stock options, respectively. The Company issued 530,500 shares of restricted stock in the three months ended March 31, 2010. The Company did not issue any shares of restricted stock in the three months ended June 30, 2010.
In accordance with ASC 718, the Company recorded $315,000 and $584,000 of stock-based compensation expense for the three months and six months ended June 30, 2011, respectively, and $498,000 and $981,000 in the three and six months ended June 30, 2010, respectively.
Options granted under the stock incentive plans were valued utilizing the Black-Scholes model using the following assumptions and had the following fair values:
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Average risk-free interest rate
    3.02 %     2.34 %     3.06 %     2.41 %
Expected dividend yield
  None     None     None     None  
Expected life
  3.5 years     3.5 years     3.5 years     3.5 years  
Expected volatility
  67.7% to 68.0%   65.6% to 71.6%   67.7% to 69.2%   70.6% to 71.6%
Weighted average exercise price
  $ 1.20     $ 1.70     $ 1.20     $ 1.58  
Weighted average fair value
  $ 0.60     $ 0.73     $ 0.61     $ 0.64  
As of June 30, 2011, there was approximately $1,623,000 of total unrecognized compensation cost related to unvested options and restricted stock. That cost is expected to be recognized over a weighted average period of 1.36 years.
The Company’s aggregate intrinsic value of options outstanding at June 30, 2011 was approximately $6,000. The aggregate intrinsic value of restricted stock outstanding at June 30, 2011, was approximately $563,000. The Company’s aggregate intrinsic value of options outstanding at June 30, 2010 was approximately $827,000. The aggregate intrinsic value of restricted stock outstanding at June 30, 2010, was approximately $1.8 million