Quarterly report pursuant to Section 13 or 15(d)

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

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Stock-Based Compensation (Unvested Restricted Stock) (Details) (Unvested Restricted Stock [Member], USD $)
1 Months Ended 3 Months Ended
Mar. 31, 2013
Feb. 28, 2013
Mar. 31, 2013
Unvested Restricted Stock [Member]
     
Number of Shares      
Unvested at beginning of period     1,335,000
Granted     61,250
Vested (560,000) (100,000) (660,000)
Forfeited       
Expired       
Unvested at end of period 736,250   736,250
Weighted Average Grant-Date Fair Value      
Unvested at beginning of period     $ 2.28
Granted     $ 2.91
Vested     $ 1.74
Forfeited       
Expired       
Unvested at end of period $ 2.81   $ 2.81