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Income Taxes (Tables) | 12 Months Ended
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Oct. 31, 2022
Income Taxes |
Schedule of Components of Loss Before Income Taxes | The components of loss before income taxes for the years ended October 31, 2022, 2021, and 2020 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
U.S. | ​ | $ | (145,439) | ​ | $ | (96,959) | ​ | $ | (85,865)
Foreign |  | ​ | (974) |  | ​ | (4,064) |  | ​ | (3,196)
Loss before income taxes | ​ | $ | (146,413) | ​ | $ | (101,023) | ​ | $ | (89,061)
Schedule of Reconciliation of Federal Statutory Income Tax Rate To Effective Income Tax Rate | The reconciliation of the federal statutory income tax rate to our effective income tax rate for the years ended October 31, 2022, 2021 and 2020 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020 |
Statutory federal income tax rate |  | (21.0) | % | (21.0) | % | (21.0) | %
Increase (decrease) in income taxes resulting from: |  | ​ | ​ | ​ | ​ |  |
State taxes, net of Federal benefits |  | (3.6) | % | (5.2) | % | (1.1) | %
Foreign withholding tax |  | 0.6 | % | 0.2 | % | — | %
Net operating loss expiration, impairment and true-ups |  | 8.7 | % | 3.6 | % | 129.2 | %
Nondeductible expenditures |  | 1.4 | % | 1.9 | % | 1.4 | %
Change in tax rates |  | 0.3 | % | (1.3) | % | (0.6) | %
Fair value adjustment on warrants |  | — | % | 3.3 | % | 8.7 | %
Other, net |  | 0.7 | % | — | % | 1.1 | %
Deferred only adjustment |  | (0.1) | % | 0.8 | % | 4.4 | %
Valuation allowance |  | 13.6 | % | 17.9 | % | (122.1) | %
Effective income tax rate |  | 0.6 | % | 0.2 | % | — | %
Schedule of Deferred Tax Assets and Liabilities | Our deferred tax assets and liabilities consisted of the following as of October 31, 2022 and 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Deferred tax assets: |  | ​ |  |  | ​ |
Compensation and benefit accruals | ​ | $ | 8,523 | ​ | $ | 7,891
Bad debt and other allowances | ​ |  | 2,453 | ​ |  | 1,081
Capital loss and tax credit carry-forwards | ​ |  | 14,310 | ​ |  | 15,191
Net operating losses (domestic and foreign) | ​ |  | 123,825 | ​ |  | 113,733
Deferred license revenue | ​ |  | 1,548 | ​ |  | 1,885
Accumulated depreciation | ​ |  | 20,229 | ​ |  | 12,379
Grant revenue | ​ |  | 475 | ​ |  | 609
Excess business interest | ​ |  | 10,424 | ​ |  | 9,695
Operating lease liabilities | ​ |  | 2,085 | ​ |  | 2,211
Gross deferred tax assets: | ​ |  | 183,872 | ​ |  | 164,675
Valuation allowance | ​ |  | (180,048) | ​ |  | (160,530)
Deferred tax assets after valuation allowance | ​ |  | 3,824 | ​ |  | 4,145
Deferred tax liability: | ​ |  | ​ | ​ |  | ​
In process research and development | ​ |  | (2,475) | ​ |  | (2,510)
Right of use assets | ​ |  | (1,809) | ​ |  | (1,964)
Net deferred tax liability | ​ | $ | (460) | ​ | $ | (329)

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