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Equity (Tables) | 12 Months Ended
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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 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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