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Income Taxes (Tables) | 12 Months Ended
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Oct. 31, 2018
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, 2018, 2017, and 2016 were as follows (in thousands):
|  | 2018 |  |  | 2017 |  |  | 2016 |
U.S. |  | $ | (47,314 | ) |  | $ | (49,723 | ) |  | $ | (46,708 | )
Foreign |  |  | (3,035 | ) |  |  | (4,136 | ) |  |  | (3,981 | )
Loss before income taxes |  | $ | (50,349 | ) |  | $ | (53,859 | ) |  | $ | (50,689 | )
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, 2018, 2017 and 2016 was as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
Statutory federal income tax rate |  |  | (23.2 | )% |  |  | (34.0 | )% |  |  | (34.0 | )%
Increase (decrease) in income taxes resulting from: |  |  |  |  |  |  |  |  |  |  |  |
State taxes, net of Federal benefits |  |  | 0.7 | % |  |  | (1.3 | )% |  |  | (0.2 | )%
Foreign withholding tax |  |  | 0.0 | % |  |  | 0.1 | % |  |  | 1.1 | %
Net operating loss expiration and true-ups |  |  | 4.6 | % |  |  | (4.6 | )% |  |  | 3.3 | %
Nondeductible expenditures |  |  | 1.5 | % |  |  | 1.9 | % |  |  | 0.9 | %
Change in tax rates |  |  | 201.6 | % |  |  | (0.8 | )% |  |  | (0.3 | )%
Other, net |  |  | 0.0 | % |  |  | 0.6 | % |  |  | 0.2 | %
Valuation allowance |  |  | (191.2 | )% |  |  | 38.2 | % |  |  | 30.1 | %
Effective income tax rate |  |  | (6.0 | )% |  |  | 0.1 | % |  |  | 1.1 | %
Schedule of Deferred Tax Assets and Liabilities | Our deferred tax assets and liabilities consisted of the following at October 31, 2018 and 2017 (in thousands):
|  | 2018 |  |  | 2017 |
Deferred tax assets: |  |  |  |  |  |  |  |
Compensation and benefit accruals |  | $ | 7,767 |  |  | $ | 11,158 |
Bad debt and other allowances |  |  | 426 |  |  |  | 605 |
Capital loss and tax credit carry-forwards |  |  | 12,295 |  |  |  | 13,398 |
Net operating losses (domestic and foreign) |  |  | 202,643 |  |  |  | 282,022 |
Deferred license revenue |  |  | 4,765 |  |  |  | 7,850 |
Inventory valuation allowances |  |  | 238 |  |  |  | 111 |
Accumulated depreciation |  |  | 4,374 |  |  |  | 5,095 |
Grant revenue |  |  | 910 |  |  |  | 1,522 |
Gross deferred tax assets: |  |  | 233,418 |  |  |  | 321,761 |
Valuation allowance |  |  | (231,403 | ) |  |  | (321,761 | )
Deferred tax assets after valuation allowance |  |  | 2,015 |  |  |  | — |
Deferred tax liability: |  |  |  |  |  |  |  |
In process research and development |  |  | (2,356 | ) |  |  | (3,377 | )
Net deferred tax liability |  | $ | (341 | ) |  | $ | (3,377 | )

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