Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Potential Dilutive Securities Excluded from the Computation of Dilutive Weighted Average Shares Outstanding (Details)

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Significant Accounting Policies - Potential Dilutive Securities Excluded from the Computation of Dilutive Weighted Average Shares Outstanding (Details) - shares
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding 7,326,871 12,613,018
Warrant [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding 1,964,250 8,896,848
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding 5,362,621 3,716,170