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Equity (Tables)

12 Months Ended

Jul. 31, 2022

Stockholders' Equity Note [Abstract]

Schedule of stock option activity

		Number of Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value (in thousands)
Outstanding at July 31, 2020			580,874			$	4.90				2.65			$	2,846
Granted			118,409				40.85				—				—
Exercised			(14,546	)			4.90				—				—
Cancelled / Forfeited			(1,323	)			4.90				—				—
Outstanding at July 31, 2021			683,414			$	11.13				3.05			$	26,982
Granted			518,304				20.54				9.25				—
Cancelled / Forfeited			(180,441	)			—				—				—
Outstanding at July 31, 2022			1,021,277			$	12.11				4.47			$	—
Exercisable at July 31, 2022			594,607			$	6.69				1.06			$	—

		Number of Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value (in thousands)
Outstanding at July 31, 2021			—			$	—				—			$	—
Granted			5,266				3.82				9.76				—
Outstanding at July 31, 2022			5,266			$	3.82				9.76				—
Exercisable at July 31, 2022			1,316			$	3.82				9.76			$	—

Schedule of Black-Scholes option pricing model

		July 31, 2022				July 31, 2021
Risk-free interest rate			0.67% - 1.7	%			1	%
Expected term (in years)			6.04 - 6.11				6.04
Expected volatility			75% - 93	%			75	%
Expected dividend yield			—	%			—	%

Risk-free interest rate			3.0	%
Expected term (in years)			5.63
Expected volatility			97.0	%
Expected dividend yield			—	%

Schedule of grants of restricted shares of Class B common stock

		Number of Non-vested Shares				Weighted Average Grant Date Fair Value
Outstanding at July 31, 2020			123,104			$	10.80
Granted			956,317				48.34
Vested			(69,347	)			(10.76	)
Cancelled / Forfeited			(2,099	)			(13.54	)
Outstanding at July 31, 2021			1,007,975			$	46.77
Granted			1,533,311				4.24
Vested			(90,608	)			16.86
Cancelled / Forfeited			(943,305	)			(48.50	)
Non-vested shares at July 31, 2022			1,507,373			$	4.22

Schedule of general and administrative expense

		Year Ended July 31,
		2022				2021
		(in thousands)
Selling, general and administrative		$	17,270			$	6,110
Research and development			791				523
Forfeiture of RSUs within selling, general and administrative			(18,978	)			—
Net stock-based compensation (credit) expense		$	(917	)		$	6,633

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- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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