Revenue Recognition - Schedule of Impacts of Topic 606 on Consolidated Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 22,712	$ 12,110	$ 49,711	$ 71,553
Costs of revenues	14,747	14,166	47,591	69,603
Gross profit	7,965		2,120
Administrative and selling expenses	7,058	6,100	23,622	19,327
Research and development expenses	1,977	6,318	12,435	15,385
Loss from operations	(1,070)	(14,474)	(33,937)	(32,762)
Interest expense	(3,536)	(2,434)	(7,807)	(6,634)
Other expense, net	(685)	1,042	(556)	3,138
Loss before benefit (provision) for income taxes	(5,291)	(15,866)	(42,300)	(36,258)
(Provision) benefit for income taxes	(20)	(15)	(89)	3,020
Net loss	(5,311)	$ (15,881)	(42,389)	$ (33,238)
Adjustments Due to Topic 606 [Member] | Topic 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	974		3,315
Costs of revenues	397		1,440
Gross profit	577		1,875
Loss from operations	577		1,875
Loss before benefit (provision) for income taxes	577		1,875
Net loss	577		1,875
Balances Without Adoption of ASC 606 [Member] | Topic 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	23,686		53,026
Costs of revenues	15,144		49,031
Gross profit	8,542		3,995
Administrative and selling expenses	7,058		23,622
Research and development expenses	1,977		12,435
Loss from operations	(493)		(32,062)
Interest expense	(3,536)		(7,807)
Other expense, net	(685)		(556)
Loss before benefit (provision) for income taxes	(4,714)		(40,425)
(Provision) benefit for income taxes	(20)		(89)
Net loss	$ (4,734)		$ (40,514)