Revenue Recognition - Schedule of Cumulative Effect and Impacts of Topic 606 on Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Nov. 01, 2018	Oct. 31, 2018
ASSETS
Unbilled receivables	$ 8,186		$ 13,759
Other assets	10,019		13,505
LIABILITIES
Accrued liabilities	8,582		7,632
Deferred revenue, current portion	15,650		11,347
Long-term deferred revenue	22,190		16,793
EQUITY
Accumulated deficit	(1,039,910)		$ (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	(110)	471
Other assets	(901)	(132)
LIABILITIES
Accrued liabilities	(939)	995
Deferred revenue, current portion	(1,518)	(240)
Long-term deferred revenue	(7,083)	6,238
EQUITY
Accumulated deficit	8,529	$ (6,654)
Balances Without Adoption of ASC 606 [Member] | Topic 606 [Member]
ASSETS
Unbilled receivables	8,076
Other assets	9,118
LIABILITIES
Accrued liabilities	7,643
Deferred revenue, current portion	14,132
Long-term deferred revenue	15,107
EQUITY
Accumulated deficit	$ (1,031,381)