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Share-Based Compensation
 9 Months Ended
Sep. 30, 2013
Share-Based Compensation [Abstract]  
Share-Based Compensation
9.Share-Based Compensation

Stock Options

During the first quarter of 2013, we issued to our executive officers and directors options to purchase an aggregate of 1,897,000 shares of our common stock, with four-year vesting for our officers and two-year vesting for our directors. The grant date fair value of the awards granted to our officers was $1.80 per share for options with an exercise price of $2.74 (which was the fair market value of our common stock on the date of grant) and $1.49 per share for options with an exercise price of $5.00, respectively.  The grant date fair value of the awards granted to our directors was $1.84 per share for options with an exercise price of $2.80 (which was the fair market value of our common stock on the date of grant). The resulting share-based compensation expense of $3,235,000, net of estimated forfeitures, will be recognized as expense over the respective vesting periods.

During the first quarter of 2013, we issued a grant to our non-executive employees options to purchase an aggregate of 552,350 shares of our common stock, with four-year vesting. The grant date fair value of the awards was $1.92 per share and $1.64 per share, respectively, due to the awards being granted on two different dates. The resulting share-based compensation expense of $974,000, net of estimated forfeitures, will be recognized as expense over the respective vesting periods.

During the first quarter of 2012, we issued to our directors and executive officers options to purchase an aggregate of 690,000 shares of our common stock, with four-year vesting for our officers and two-year vesting for our directors. The grant date fair value of the awards granted to our officers was $2.10 per share and to our directors was $1.35 per share. The resulting share-based compensation expense of $1,373,000, net of estimated forfeitures, will be recognized as expense over the respective vesting periods.
Restricted Stock Awards

During the first quarter of 2012, we issued to our executive officers 190,000 shares of restricted stock.  The stock award vested on January 10, 2013 and the resulting share-based compensation expense of $602,000 was recognized as expense over the vesting period.

Performance-Based Restricted Stock Awards

In January 2012, we granted 276,375 performance-based restricted stock awards under the 2004 Equity Incentive Plan.  The awards provide certain employees until December 31, 2012 to achieve certain performance goals established by the Compensation Committee. In January 2013, the Compensation Committee reviewed the employees performance against the performance goals and allowed only a portion of the awards to continue vesting based on partial achievement of the goals.  As a result of this decision, 86,229 shares with fair value of $2.74 per share will continue vesting under the terms of the grant.   Since we have not recognized any expense relating to these shares through December 31, 2012, additional compensation expense of $236,000 resulting from this grant modification will be recognized from the modification date through the vesting date of January 2014.  We recognized $92,000 and $252,000 of compensation expense related to performance-based awards during the three and nine months ended September 30, 2013, respectively.