Revenue Recognition - Schedule of Impacts of Topic 606 on Consolidated Statements of Operations and Comprehensive Loss (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 9,216,000	$ 20,830,000	$ 26,999,000	$ 59,443,000
Costs of revenues	12,856,000	21,459,000	32,844,000	55,437,000
Gross (loss) profit	(3,640,000)	(629,000)	(5,845,000)	4,006,000
Administrative and selling expenses	9,805,000	7,085,000	16,564,000	13,227,000
Research and development expenses	4,178,000	5,021,000	10,458,000	9,067,000
Loss from operations	(17,623,000)	(12,735,000)	(32,867,000)	(18,288,000)
Interest expense	(1,807,000)	(2,059,000)	(4,271,000)	(4,200,000)
Other income (expense), net	(31,000)	1,620,000	129,000	2,096,000
Loss before benefit (provision) for income taxes	(19,461,000)	(13,174,000)	(37,009,000)	(20,392,000)
(Provision) benefit for income taxes	(69,000)	0	(69,000)	3,035,000
Net loss	(19,530,000)	$ (13,174,000)	(37,078,000)	$ (17,357,000)
Adjustments Due to Topic 606 [Member] | Topic 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	792,000		2,340,000
Costs of revenues	767,000		1,042,000
Gross (loss) profit	25,000		1,298,000
Loss from operations	25,000		1,298,000
Loss before benefit (provision) for income taxes	25,000		1,298,000
Net loss	25,000		1,298,000
Balances Without Adoption of ASC 606 [Member] | Topic 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	10,008,000		29,339,000
Costs of revenues	13,623,000		33,886,000
Gross (loss) profit	(3,615,000)		(4,547,000)
Administrative and selling expenses	9,805,000		16,564,000
Research and development expenses	4,178,000		10,458,000
Loss from operations	(17,598,000)		(31,569,000)
Interest expense	(1,807,000)		(4,271,000)
Other income (expense), net	(31,000)		129,000
Loss before benefit (provision) for income taxes	(19,436,000)		(35,711,000)
(Provision) benefit for income taxes	(69,000)		(69,000)
Net loss	$ (19,505,000)		$ (35,780,000)