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 6 Months Ended
Apr. 30, 2013
Mar. 31, 2013
Feb. 28, 2013
Jun. 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)
Unvested at end of period       651,250
Weighted Average Grant-Date Fair Value        
Unvested at beginning of period       $ 2.28
Granted       $ 2.91
Vested       $ 1.86
Unvested at end of period       $ 2.82