Leases - Additional Information (Details) - USD ($)	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Nov. 01, 2019	Oct. 31, 2019
Lessee Lease Description [Line Items]
Operating lease ROU asset	$ 10,276,000		$ 10,100,000
Operating lease liability	10,615,000		10,300,000
Adoption of new lease accounting standard, impact on accumulated deficit			0
Finance lease ROU assets	$ 100,000
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Finance lease, liability	$ 111,000
Finance Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Operating lease expense	$ 156,000	$ 0
Operating lease, weighted average remaining lease term	20 years
Operating lease, weighted average discount rate	6.20%
Operating lease, payments	$ 211,000	0
Long-term non-cancelable operating leases, Fiscal Year 2020				$ 1,100,000
Long-term non-cancelable operating leases, Fiscal Year 2021				1,400,000
Long-term non-cancelable operating leases, Fiscal Year 2022				1,300,000
Long-term non-cancelable operating leases, Fiscal Year 2023				900,000
Long-term non-cancelable operating leases, Fiscal Year 2024				700,000
Long-term non-cancelable operating leases, Thereafter				14,600,000
Long-term non-cancelable operating leases, rental commitments on an undiscounted lease payment				$ 19,900,000
ASC 842 [Member]
Lessee Lease Description [Line Items]
Operating lease ROU asset			10,100,000
Operating lease liability			$ 10,300,000
Operating lease expense		$ 200,000
Minimum [Member]
Lessee Lease Description [Line Items]
Operating and finance lease, remaining lease term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating and finance lease, remaining lease term	26 years