Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 6 months ended Apr. 30, 2017 - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Oct. 31, 2016	$ 10,153	$ 3	$ 123,417	$ (128,176)	$ 5,397
Balance, shares at Oct. 31, 2016	7,374,454	2,782,963
Conversion of Series A preferred stock to common stock	$ (816)	$ 1	815
Conversion of Series A preferred stock to common stock, shares	(3,336,700)	613,423
Conversion of Series B preferred stock to common stock	$ (514)		514
Conversion of Series B preferred stock to common stock, shares	(6,092)	101,540
Conversion of Series C preferred stock to common stock	$ (441)		441
Conversion of Series C preferred stock to common stock, shares	(5,648)	96,346
Conversion of Series D preferred stock to common stock	$ (1,127)		1,127
Conversion of Series D preferred stock to common stock, shares	(96,332)	160,551
Issuance of Series E preferred stock for research and development intellectual property	$ 104,693				104,693
Issuance of Series E preferred stock for research and development intellectual property, shares	7,050
Proceeds from option exercises			588		588
Proceeds from option exercises, shares		121,698
Warrant exchange to common stock			78		78
Warrant exchange to common stock, shares		56,250
Stock-based compensation expense		$ 1	8,623		8,624
Stock-based compensation expense, shares		1,031,000
Shares issued for cash		$ 1	2,277		2,278
Shares issued for cash, shares		759,333
Net loss				(116,021)	(116,021)
Balance at Apr. 30, 2017	$ 111,948	$ 6	$ 137,880	$ (244,197)	$ 5,637
Balance, shares at Apr. 30, 2017	3,936,732	5,723,104