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Income Taxes (Tables) | 12 Months Ended
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Oct. 31, 2020
Income Tax Disclosure [Abstract] |
Schedule of Components of Loss Before Income Taxes | The components of loss before income taxes for the years ended October 31, 2020, 2019, and 2018 were as follows (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
U.S. |  | $ | (85,865 | ) |  | $ | (74,133 | ) |  | $ | (47,314 | )
Foreign |  |  | (3,196 | ) |  |  | (3,326 | ) |  |  | (3,035 | )
Loss before income taxes |  | $ | (89,061 | ) |  | $ | (77,459 | ) |  | $ | (50,349 | )
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, 2020, 2019 and 2018 was as follows:
|  | 2020 |  |  | 2019 |  |  | 2018 |
Statutory federal income tax rate |  |  | (21.0 | )% |  |  | (21.0 | )% |  |  | (23.2 | )%
Increase (decrease) in income taxes resulting from: |  |  |  |  |  |  |  |  |  |  |  |
State taxes, net of Federal benefits |  |  | (1.1 | )% |  |  | (2.9 | )% |  |  | 0.7 | %
Foreign withholding tax |  |  | 0.0 | % |  |  | 0.1 | % |  |  | 0.0 | %
Net operating loss expiration, impairment and true-ups |  |  | 129.2 | % |  |  | (1.3 | )% |  |  | 4.6 | %
Nondeductible expenditures |  |  | 1.4 | % |  |  | 0.2 | % |  |  | 1.5 | %
Change in tax rates |  |  | (0.6 | )% |  |  | (0.1 | )% |  |  | 201.6 | %
Fair value adjustment on warrants |  |  | 8.7 | % |  |  | — |  |  |  | — |
Other, net |  |  | 1.1 | % |  |  | (0.3 | )% |  |  | 0.0 | %
Deferred only adjustment |  |  | 4.4 | % |  |  | — |  |  |  | 0.0 | %
Valuation allowance |  |  | (122.1 | )% |  |  | 25.4 | % |  |  | (191.2 | )%
Effective income tax rate |  |  | — |  |  |  | 0.1 | % |  |  | (6.0 | )%
Schedule of Deferred Tax Assets and Liabilities | Our deferred tax assets and liabilities consisted of the following as of October 31, 2020 and 2019 (in thousands):
|  | 2020 |  |  | 2019 |
Deferred tax assets: |  |  |  |  |  |  |  |
Compensation and benefit accruals |  | $ | 8,157 |  |  | $ | 7,446 |
Bad debt and other allowances |  |  | 1,458 |  |  |  | 905 |
Capital loss and tax credit carry-forwards |  |  | 15,456 |  |  |  | 12,645 |
Net operating losses (domestic and foreign) |  |  | 100,791 |  |  |  | 217,430 |
Deferred license revenue |  |  | 2,093 |  |  |  | 4,264 |
Inventory valuation allowances |  |  | 116 |  |  |  | 312 |
Accumulated depreciation |  |  | 9,759 |  |  |  | 9,200 |
Grant revenue |  |  | 700 |  |  |  | 798 |
Excess business interest |  |  | 5,544 |  |  |  | - |
Operating lease liabilities |  |  | 2,387 |  |  |  | - |
Gross deferred tax assets: |  |  | 146,461 |  |  |  | 253,000 |
Valuation allowance |  |  | (142,217 | ) |  |  | (250,985 | )
Deferred tax assets after valuation allowance |  |  | 4,244 |  |  |  | 2,015 |
Deferred tax liability: |  |  |  |  |  |  |  |
In process research and development |  |  | (2,391 | ) |  |  | (2,321 | )
Right of use assets |  |  | (2,229 | ) |  |  |  |
Net deferred tax liability |  | $ | (376 | ) |  | $ | (306 | )

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