Stock-Based Compensation (Tables)

9 Months Ended

Apr. 30, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Common stock options granted, forfeited or expired and exercised

The following is a summary of the common stock options granted, forfeited or expired and exercised under the Plan:

	Options			Weighted Average Exercise Price per Share			Weighted Average Remaining Life (Years)		Aggregate Intrinsic Value
Outstanding - July 31, 2018		232,218		$	1.46			0.22		380,247
Granted		6,650,625			0.56
Forfeited or expired		(1,364,168	)		(0.37	)
Exercised		—			—
Outstanding - April 30, 2019		5,518,675		$	0.68			9.15		3,157,178

Fair value assumptions used in Black-Scholes option-pricing

The following assumptions were used in the Black-Scholes option-pricing model:

	April 30, 2019
Exercise price	$0.64 – 1.85
Expected term	5 to 10 years
Risk-free interest rate	2.56% - 3.15	%
Estimated volatility	135.2% - 222.2	%
Expected dividend	—
Stock price at valuation date	$0.64 – $1.85