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Stock Warrants (Details 4)
3 Months Ended
Mar. 31, 2019
$ / shares
shares
Exercise Price 1.38 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price | $ / shares $ 1.38
Warrants Outstanding 17,999,999
Warrants Exercisable 17,999,999
Weighted Average Remaining Contractual Life 4 years 6 months 14 days
Exercise Price 18.20 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price | $ / shares $ 18.20
Warrants Outstanding 714
Warrants Exercisable 714
Weighted Average Remaining Contractual Life 3 years 8 months 26 days
Exercise Price 50.05 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price | $ / shares $ 50.05
Warrants Outstanding 714,286
Warrants Exercisable 714,286
Weighted Average Remaining Contractual Life 1 year 7 months 20 days
Exercise Price 61.25 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price | $ / shares $ 61.25
Warrants Outstanding 200,852
Warrants Exercisable 200,852
Weighted Average Remaining Contractual Life 6 months 10 days
Exercise Price 3.85 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price | $ / shares $ 3.85
Warrants Outstanding 18,915,851
Warrants Exercisable 18,915,851
Weighted Average Remaining Contractual Life 4 years 4 months 17 days