Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (14,089)	$ (5,661)
Loss from discontinued operations		432
Loss from continuing operations	(14,089)	(5,229)
Adjustments to reconcile net loss from continuing operations to net cash used in continuing operating activities:
Depreciation and amortization	256
Stock based compensation expense	11,132	3,975
Change in fair value of warrant liability and embedded derivative	(3,374)	8
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	46	(204)
Security deposits – non-current	(111)
Accounts payable and accrued expenses	1,067	694
Net cash used in continuing operating activities	(5,073)	(756)
Net cash provided by discontinued operating activities		395
Net cash used in operating activities	(5,073)	(361)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(2,664)	(1,538)
Net cash used in continuing investing activities	(2,664)	(1,538)
Net cash provided by discontinued investing activities	15
Net cash used in investing activities	(2,649)	(1,538)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	45
Proceeds from the sale of common stock		2,278
Net cash provided by financing activities	45	2,278
Net decrease in cash and cash equivalents	(7,677)	379
Cash and cash equivalents - beginning of period	17,667	6,523
Cash and cash equivalents - end of period	9,990	6,902
Supplemental schedule of non-cash investing and financing activities:
Conversion of Series A preferred stock to common stock	378	297
Conversion of Series B preferred stock to common stock		513
Conversion of Series C preferred stock to common stock	201	90
Conversion of Series D preferred stock to common stock	312	721
Unpaid liability for acquisition of property and equipment	360	54
Warrant exchange for common stock shares		78
Deemed dividend – accretion of discount on preferred stock	904
Cumulative dividends on Series F preferred stock	275
Series F preferred stock dividends paid in common stock	$ 306