Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Details)

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Stock-Based Compensation - Summary of Stock Option Activity (Details) - 6 months ended Jun. 30, 2015 - $ / shares
Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of shares, options outstanding, at the beginning 6,850,000
Number of shares, options exercisable, at the beginning 4,675,000
Number of shares, granted 500,000
Number of shares, exercised  
Number of shares, expired (100,000)
Number of shares, options outstanding, at the end 7,250,000
Number of shares, options exercisable, at the end 7,100,000
Weighted average exercise price, options outstanding, at the beginning $ 0.582
Weighted average exercise price, options exercisable, at the beginning 0.626
Weighted average exercise price, granted $ 0.250
Weighted average exercise price, exercised  
Weighted average exercise price, expired $ 0.500
Weighted average exercise price, options outstanding, at the end 0.560
Weighted average exercise price, options exercisable, at the end $ 0.564
Weighted average remaining contractual life (in years), options outstanding 2 years 11 months 1 day
Weighted average remaining contractual life (in years), options exercisable 2 years 7 months 13 days