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Stock-Based Compensation
6 Months Ended
Jun. 30, 2011
Stock-Based Compensation [Abstract]  
STOCK-BASED COMPENSATION
NOTE 3 — STOCK-BASED COMPENSATION
Under the Merger Agreement, holders of our outstanding stock options, whether or not then exercisable or vested, elected to receive, at the effective time of the Merger, either cash or fully exercisable and vested stock options to purchase Archer common shares. In addition, all restrictions on time-lapse and performance-based restricted stock awards were deemed to have lapsed and each restricted share was deemed to be an unrestricted share of our common stock. Our Incentive Stock Plans were terminated in connection with the Merger. Our net loss for the two months ended February 28, 2011 includes approximately $6.1 million of compensation costs related to share-based payments with approximately $5.4 million of this amount relating to the acceleration of stock based compensation expense associated with the Merger.
We recognize all share-based payments to employees and directors in the financial statements based on their grant-date fair values. We utilize the Black-Scholes model to determine fair value, which incorporates assumptions to value stock-based awards. The dividend yield on our common stock is assumed to be zero as we have historically not paid dividends and have no current plans to do so in the future. The expected volatility is based on historical volatility of our common stock. The risk-free interest rate is the related United States Treasury yield curve for periods within the expected term of the option at the time of grant. We estimate forfeiture rates based on our historical experience.
The following summarizes the Black-Scholes model assumptions used for the options granted in the three and six months ended June 30, 2010 (no options were granted during the three and six months ended June 30, 2011):
                 
    Three Months     Six Months  
    Ended     Ended  
    June 30,     June 30,  
    2010     2010  
Expected dividend yield
           
Expected price volatility
    88.54 %     89.81 %
Risk free interest rate
    1.51 %     1.41 %
Expected life of options
  5 years     5 years  
Weighted average fair value of options granted at market value
  $ 2.70     $ 2.63  
A summary of our stock option activity and related information is as follows:
                 
            Weighted  
    Shares     Average  
    Under     Exercise  
    Option     Price  
Balance at December 31, 2010
    1,751,018     $ 4.74  
Granted
           
Converted at Merger
    (1,750,018 )     4.74  
Exercised
    (1,000 )     1.23  
 
             
Outstanding at June 30, 2011
           
 
             
Restricted stock awards, or RSAs, activity during the three months ended June 30, 2011 is as follows:
                 
            Weighted  
            Average Grant-  
            Date Fair Value  
    Number of Shares     Per Share  
Nonvested at December 31, 2010
    1,702,067     $ 6.09  
Granted
           
Vested
    (1,702,067 )     6.09  
Forfeited
           
 
             
Nonvested at June 30, 2011
        $