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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Oct. 31, 2018
Oct. 31, 2017
Income Tax Disclosure [Abstract]      
Impairment of development costs $ 7
Depreciation and amortization (533) (546) 95
Compensation expense not deductible until options are exercised 12,543 10,529 4,553
All other temporary differences 236 382 248
Net operating loss carry forward 10,526 8,455 3,158
Less valuation allowance (22,772) (18,827) (8,054)
Deferred tax asset (liability)