Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Net revenues	$ 416		$ 432
Cost of sales	229		231
Gross profit	187		201
Operating costs and expenses
Product research and development	2,339	1,641	14,563	3,424
Research and development - intellectual property acquired				104,693
General and administrative	15,239	3,629	32,074	12,757
Operating costs and expenses total	17,578	5,270	46,637	120,874
Operating loss	(17,391)	(5,270)	(46,436)	(120,874)
Other (expenses) income
Interest income	146	3	189	10
Change in fair value of derivatives			3,814	(8)
Loss on extinguishment of warrant liability			(520)
Net loss from continuing operations	(17,245)	(5,267)	(42,953)	(120,872)
Gain (loss) from discontinued operations		(33)		(449)
Gain on sale of discontinued operations		100		100
Gain (loss) from discontinued operations, net		67		(349)
Net loss	(17,245)	(5,200)	(42,953)	(121,221)
Deemed dividend - accretion of discount on Series F preferred stock			(1,290)
Deemed dividend - exchange of Series F preferred stock			(7,057)
Cumulative dividends on Series F preferred stock			(373)
Net loss attributable to common stockholders	$ (17,245)	$ (5,200)	$ (51,673)	$ (121,221)
Net loss per share, basic and diluted:
Loss from continuing operations	$ (0.86)	$ (0.94)	$ (3.24)	$ (26.65)
Gain (loss) from discontinued operations		0.01		(0.08)
Deemed dividend - accretion of discount on preferred stock			(0.10)
Deemed dividend - exchange of Series F preferred stock			(0.53)
Cumulative dividends on Series F preferred stock			(0.03)
Net loss attributable to common stockholders	$ (0.86)	$ (0.93)	$ (3.90)	$ (26.73)
Weighted average shares outstanding, basic and diluted:	20,092,848	5,568,072	13,256,693	4,534,967