Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Assumptions for share based compensation computation) (Details)

v2.4.0.6
Stockholders' Equity (Assumptions for share based compensation computation) (Details)
12 Months Ended
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum 52.60%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum 55.80%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum 2.00%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum 2.90%
Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share based Compensation Arrangement By Share based Payment Award Fair Value Assumptions Expected Term 1 5 years
Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share based Compensation Arrangement By Share based Payment Award Fair Value Assumptions Expected Term 1 6 years 6 months