Intangible assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2015	Oct. 31, 2014
Intangible Assets [Line Items]
Amortizable intangible assets, net	$ 4,268	$ 1,187
Non-amortizable intangible assets, trade marks	1,387	410
Non-compete agreements (estimated lives 3 - 5 years)
Intangible Assets [Line Items]
Amortizable intangible assets, gross	310	200
Amortizable intangible assets, accumulated amortization	(212)	(135)
Amortizable intangible assets, net	98	65
Customer relationships (estimated lives 7 - 15 years)
Intangible Assets [Line Items]
Amortizable intangible assets, gross	5,099	1,730
Amortizable intangible assets, accumulated amortization	(1,101)	(608)
Amortizable intangible assets, net	3,998	1,122
Backlog (estimated life 1 year)
Intangible Assets [Line Items]
Amortizable intangible assets, gross	134	75
Amortizable intangible assets, accumulated amortization	(100)	(75)
Amortizable intangible assets, net	34	0
Patents (estimated life 14 years)
Intangible Assets [Line Items]
Amortizable intangible assets, gross	142	0
Amortizable intangible assets, accumulated amortization	(4)	0
Amortizable intangible assets, net	$ 138	$ 0

Intangible Assets [Line Items]

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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