Debt (Details) - Black-Scholes option pricing model [Member]	6 Months Ended
	Jan. 31, 2019
Debt Instrument [Line Items]
Expected dividend yield	0.00%
Minimum [Member]
Debt Instrument [Line Items]
Expected stock price volatility	165.84%
Risk-free interest rate	2.21%
Expected term	6 months 29 days
Maximum [Member]
Debt Instrument [Line Items]
Expected stock price volatility	190.31%
Risk-free interest rate	2.93%
Expected term	2 years 9 months