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Benefit Plans (Tables) | 12 Months Ended
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Oct. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Share-Based Compensation Reflected in Consolidated Statement of Operations and Comprehensive Loss | Share-based compensation was reflected in the Consolidated Statements of Operations and Comprehensive Loss as follows (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
Cost of revenues |  | $ | 344 |  |  | $ | 593 |  |  | $ | 543 |
General and administrative expense |  |  | 1,424 |  |  |  | 1,865 |  |  |  | 2,256 |
Research and development expense |  |  | 54 |  |  |  | 272 |  |  |  | 355 |
|  | $ | 1,822 |  |  | $ | 2,730 |  |  | $ | 3,154 |
Schedule of Fair Value of Stock Options Estimated on Grant Date | The fair value of stock options is estimated on the grant date using the Black-Scholes option valuation model as follows:
|  | 2018 |
Expected life (in years) |  |  | 7.0 |
Risk free interest rate |  |  | 2.8 | %
Volatility |  |  | 72.7 | %
Dividend yield |  |  | — | %
Summary of Stock Option Activity | The following table summarizes our stock option activity for the year ended October 31, 2020:
|  |  |  |  |  | Weighted- Average Option |
Options |  | Shares |  |  | Price |
Outstanding as of October 31, 2019 |  |  | 24,927 |  |  | $ | 104.73 |
Cancelled and forfeited |  |  | (1,036 | ) |  | $ | 416.16 |
Outstanding as of October 31, 2020 |  |  | 23,891 |  |  | $ | 91.23 |
Summary of Information about Stock Options Outstanding and Exercisable | The following table summarizes information about stock options outstanding and exercisable as of October 31, 2020:
|  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Average |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  |  |  |  |  | Remaining |  |  | Average |  |  |  |  |  |  | Average |
Range of |  | Number |  |  | Contractual |  |  | Exercise |  |  | Number |  |  | Exercise |
Exercise Prices |  | outstanding |  |  | Life |  |  | Price |  |  | exercisable |  |  | Price |
$0.00 — $38.76 |  |  | 13,192 |  |  |  | 6.9 |  |  | $ | 19.16 |  |  |  | 13,192 |  |  | $ | 19.16 |
$38.77 — $416.16 |  |  | 10,699 |  |  |  | 3.1 |  |  | $ | 180.09 |  |  |  | 10,699 |  |  | $ | 180.09 |
|  |  | 23,891 |  |  |  | 5.2 |  |  | $ | 91.23 |  |  |  | 23,891 |  |  | $ | 91.23 |
Summary of RSA and RSU Activity | The following table summarizes our RSA and RSU activity for the year ended October 31, 2020:
|  |  |  |  |  | Weighted- Average |
Restricted Stock Awards and Units |  | Shares |  |  | Fair Value |
Outstanding as of October 31, 2019 |  |  | 191,115 |  |  |  | 16.11 |
Granted |  |  | 1,978,108 |  |  |  | 2.84 |
Vested |  |  | (95,127 | ) |  |  | 17.15 |
Forfeited |  |  | (6,956 | ) |  |  | 17.79 |
Outstanding as of October 31, 2020 |  |  | 2,067,140 |  |  |  | 5.06 |

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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of activity for outstanding award under share-based payment arrangement excluding share and unit options and nonvested award. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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