Business Acquisition - Summarizes the allocation of the estimated purchase price at fair value (Details) - USD ($)			3 Months Ended	12 Months Ended
	Nov. 04, 2019	Nov. 01, 2019	Jan. 31, 2020	Oct. 31, 2019
Allocation of the estimated purchase price at fair value
Goodwill			$ 2,753,000	$ 1,340,000
Schrofftech
Business Acquisition [Line Items]
Cash consideration paid	$ 4,000,000	$ 4,000,000
Earn-out Payment, Targeted Period	2 years
Additional cash earn-out payments	$ 2,400,000	1,249,000
Total costs related to the acquisition	136,000		28,000	$ 108,000
Contributed revenue			1,100,000
Contributed pretax income			$ 83,000
Components of the purchase price at fair value
Cash consideration paid	4,000,000	4,000,000
Earn-out	$ 2,400,000	1,249,000
Total purchase price		5,249,000
Allocation of the estimated purchase price at fair value
Current assets		1,168,000
Fixed assets		58,000
Intangible assets		3,299,000
Goodwill		1,413,000
Non-interest bearing liabilities		(689,000)
Net assets		$ 5,249,000