Revenue Recognition - Schedule of Cumulative Effect and Impacts of Topic 606 on Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Nov. 01, 2018	Oct. 31, 2018
ASSETS
Unbilled receivables	$ 12,387		$ 13,759
Other assets	23,067		13,505
LIABILITIES
Accrued liabilities	11,051		7,632
Deferred revenue, current portion	17,213		11,347
Long-term deferred revenue	22,769		16,793
EQUITY
Accumulated deficit	(1,015,069)		$ (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	(226)	471
Other assets	(942)	(132)
LIABILITIES
Accrued liabilities	(2,310)	995
Deferred revenue, current portion	(495)	(240)
Long-term deferred revenue	(6,472)	6,238
EQUITY
Accumulated deficit	8,109	$ (6,654)
Balances Without Adoption of ASC 606 [Member] | Topic 606 [Member]
ASSETS
Unbilled receivables	12,161
Other assets	22,125
LIABILITIES
Accrued liabilities	8,741
Deferred revenue, current portion	16,718
Long-term deferred revenue	16,297
EQUITY
Accumulated deficit	$ (1,006,960)