Quarterly report pursuant to Section 13 or 15(d)

Fair value of financial instruments (Details 1)

v3.19.2
Fair value of financial instruments (Details 1)
 12 Months Ended
Dec. 31, 2018
$ / shares
Fair Market Value of Common Stock | $ / shares $ 0.16
Issuance Date [Member]  
Term 5 years
Fair Market Value of Common Stock | $ / shares $ 0.3275
Risk-Free Interest Rate [Member]  
Derivative Asset, Measurement Input 2.41
Risk-Free Interest Rate [Member] | Issuance Date [Member]  
Derivative Asset, Measurement Input 2.47
Risk-Free Interest Rate [Member] | Issuance Date [Member] | Maximum [Member]  
Derivative Asset, Measurement Input 2.47
Risk-Free Interest Rate [Member] | Issuance Date [Member] | Minimum [Member]  
Derivative Asset, Measurement Input 2.41
Expected Dividend Yield [Member]  
Derivative Asset, Measurement Input 0
Expected Dividend Yield [Member] | Issuance Date [Member]  
Derivative Asset, Measurement Input 0
Probability of Conversion into Equity [Member]  
Derivative Asset, Measurement Input 90
Probability of Conversion into Equity [Member] | Issuance Date [Member] | Maximum [Member]  
Derivative Asset, Measurement Input 90
Probability of Conversion into Equity [Member] | Issuance Date [Member] | Minimum [Member]  
Derivative Asset, Measurement Input 50
Expected Volatility [Member]  
Derivative Asset, Measurement Input 91.95
Expected Volatility [Member] | Issuance Date [Member]  
Derivative Asset, Measurement Input 91.95
Measurement Input, Expected Term [Member]  
Term 1 month 2 days
Measurement Input, Expected Term [Member] | Issuance Date [Member]  
Term 5 years
Measurement Input, Expected Term [Member] | Issuance Date [Member] | Maximum [Member]  
Term 7 months 2 days
Measurement Input, Expected Term [Member] | Issuance Date [Member] | Minimum [Member]  
Term 1 month 2 days