Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share (Schedule of Antidilutive Securities) (Details)

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Net Income (Loss) Per Share (Schedule of Antidilutive Securities) (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities 26,566,815 26,566,815 12,131,613
Options to purchase common stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities 12,822,374 12,822,374 3,724,529
Warrants to purchase common stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities 13,744,441 13,744,441 8,407,084