Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Schedule of Unvested Restricted Stock) (Details)

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Stock-Based Compensation (Schedule of Unvested Restricted Stock) (Details) (Unvested Restricted Stock [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Unvested Restricted Stock [Member]
   
Number of Shares    
Unvested at beginning of year 1,556,000  
Granted 405,000  
Vested (30,000) (1,050,000)
Forfeited     
Expired (596,000)  
Unvested at end of year 1,335,000 1,556,000
Weighted Average Grant-Date Fair Value    
Unvested at beginning of year $ 2.48  
Granted $ 3.14  
Vested $ 2.86  
Forfeited     
Expired $ 3.36  
Unvested at end of year $ 2.28 $ 2.48