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Schedule II - Valuation and Qualifying Accounts and Reserves (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]      
Receivable write-offs $ 312 $ 204 $ 13
Recoveries on accounts previously written off     2
Allowance for Doubtful Accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 608 497 809
Charged to Costs and Expenses 88 315 (301)
Charged to Other Accounts         
Deductions 312 204 11
Balance at End of Period 384 608 497
Accrued Warranty Expenses [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 1,725 1,591 1,286
Charged to Costs and Expenses 3,465 3,127 2,180
Charged to Other Accounts         
Deductions 3,567 2,993 1,875
Balance at End of Period 1,623 1,725 1,591
Income Tax Valuation Allowance [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 487 961 163
Charged to Costs and Expenses 360 72 826
Charged to Other Accounts         
Deductions (387) (546) (28)
Balance at End of Period $ 460 $ 487 $ 961