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Warrants (Details 1)
 3 Months Ended
Mar. 31, 2018
$ / shares
shares
Warrants (Equity) [Member]  
Summary of outstanding debt and equity warrants [Line Items]  
Number of Shares, Warrants, Beginning Balance | shares 33,004,011
Number of Shares, Warrants issued with revolver loan | shares 1,851,852
Number of Shares, Warrants expired | shares 530,513
Number of Shares, Warrants, Ending Balance | shares 34,325,350
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 0.47
Weighted Average Exercise Price, Warrants issued with revolver loan | $ / shares 0.27
Weighted Average Exercise Price, Warrants expired | $ / shares 10.73
Weighted Average Exercise Price, Ending Balance | $ / shares $ 0.30
Weighted Average Remaining Contractual Life, Beginning Period 3 years 6 months 18 days
Weighted Average Remaining Contractual Life, Warrants issued with revolver loan 4 years 9 months 18 days
Weighted Average Remaining Contractual Life, Ending Period 3 years 5 months 5 days
Warrants (Liability) [Member]  
Summary of outstanding debt and equity warrants [Line Items]  
Number of Shares, Warrants, Beginning Balance | shares 6,487,500
Number of Shares, Warrants issued with revolver loan | shares
Number of Shares, Warrants expired | shares
Number of Shares, Warrants, Ending Balance | shares 6,487,500
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 0.35
Weighted Average Exercise Price, Warrants issued with revolver loan | $ / shares
Weighted Average Exercise Price, Warrants expired | $ / shares
Weighted Average Exercise Price, Ending Balance | $ / shares $ 0.35
Weighted Average Remaining Contractual Life, Beginning Period 1 year 7 months 21 days
Weighted Average Remaining Contractual Life, Ending Period 1 year 4 months 20 days