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Components of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Oct. 31, 2012
Intangible Assets [Line Items]    
Amortizable intangible assets, net $ 1,517 $ 1,627
Non-amortizable intangible assets, trade marks 410 410
Non-compete agreements (estimated life 5 years)
    
Intangible Assets [Line Items]    
Amortizable intangible assets, gross 200 200
Amortizable intangible assets, accumulated amortization (75) (55)
Amortizable intangible assets, net 125 145
Customer relationships (estimated life 9.6 years)
    
Intangible Assets [Line Items]    
Amortizable intangible assets, gross 1,730 1,730
Amortizable intangible assets, accumulated amortization (338) (248)
Amortizable intangible assets, net 1,392 1,482
Backlog (estimated life 6 months)
    
Intangible Assets [Line Items]    
Amortizable intangible assets, gross 75 75
Amortizable intangible assets, accumulated amortization (75) (75)
Amortizable intangible assets, net $ 0 $ 0