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Stock Based Compensation
 3 Months Ended
Mar. 31, 2012
Stock-Based Compensation [Abstract]  
Stock Based Compensation
Note 7 - Stock-Based Compensation

We account for equity instruments issued to employees in accordance with the fair value method which requires that such issuances be recorded at their fair value on the grant date.  The recognition of the expense is subject to periodic adjustment as the underlying equity instrument vests.

Stock-based compensation expense included in general and administrative expenses was $873 and $643 for the three months ended March 31, 2012 and 2011, respectively.

As of March 31, 2012, the unrecognized stock-based compensation expense related to non-vested stock options was $8,673 which will be amortized as expense over an estimated weighted average vesting amortization period of approximately 0.6 years, as compared to $3,384 and 1 year for 2011.