Revenue Recognition - Schedule of Cumulative Effect and Impacts of Topic 606 on Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Nov. 01, 2018	Oct. 31, 2018
ASSETS
Unbilled receivables	$ 11,078		$ 13,759
Other assets	20,251		13,505
LIABILITIES
Accrued liabilities	10,954		7,632
Deferred revenue, current portion	16,331		11,347
Long-term deferred revenue	22,470		16,793
EQUITY
Accumulated deficit	(1,034,599)		$ (990,867)
Topic 606 [Member]
ASSETS
Unbilled receivables		$ 14,230
Other assets		13,373
LIABILITIES
Accrued liabilities		8,627
Deferred revenue, current portion		11,107
Long-term deferred revenue		23,031
EQUITY
Accumulated deficit		(997,521)
Adjustments Due to Topic 606 [Member] | Topic 606 [Member]
ASSETS
Unbilled receivables	(342)	471
Other assets	(626)	(132)
LIABILITIES
Accrued liabilities	(1,509)	995
Deferred revenue, current portion	(886)	(240)
Long-term deferred revenue	(6,696)	6,238
EQUITY
Accumulated deficit	8,123	$ (6,654)
Balances Without Adoption of ASC 606 [Member] | Topic 606 [Member]
ASSETS
Unbilled receivables	10,736
Other assets	19,625
LIABILITIES
Accrued liabilities	9,445
Deferred revenue, current portion	15,445
Long-term deferred revenue	15,774
EQUITY
Accumulated deficit	$ (1,026,476)