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 9 Months Ended
Jul. 31, 2013
Apr. 30, 2013
Mar. 31, 2013
Feb. 28, 2013
Sep. 30, 2013
Unvested Restricted Stock [Member]
         
Number of Shares          
Unvested at beginning of period         1,335,000
Granted         61,250
Vested   (85,000) (560,000) (100,000) (745,000)
Forfeited (29,250)       (29,250)
Unvested at end of period         622,000
Weighted Average Grant-Date Fair Value          
Unvested at beginning of period         $ 2.28
Granted         $ 2.91
Vested         $ 1.86
Forfeited         $ 4.23
Unvested at end of period         $ 2.75