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Debt - Additional Information (Detail)
3 Months Ended 12 Months Ended
Dec. 15, 2017
USD ($)
Jun. 30, 2014
USD ($)
Mar. 18, 2014
USD ($)
Oct. 31, 2018
USD ($)
d
$ / shares
Oct. 31, 2017
USD ($)
Jul. 31, 2018
USD ($)
Debt Instrument [Line Items]            
Debt instrument issued       $ 63,925,000   $ 67,625,000
Debt instrument issuance costs       150,000   252,000
Purchase of the Company's Convertible Notes       3,700,000    
Notes payable, Fair Value       63,975,000   66,658,000
Debt instrument, carrying amount       $ 62,085,000   $ 64,530,000
Convertible debt, remaining discount amortization period       4 months    
Debt instrument, interest expense       $ 1,051,000 $ 1,041,000  
PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Line of credit facility, term   5 years        
Line of credit facility, maximum credit commitment   $ 50,000,000        
Credit facility expiry date           Jun. 30, 2019
Line of credit facility, unutilized commitment fee percentage   0.25%        
Outstanding indebtedness under the Credit Facility       0   $ 0
Available borrowing capacity under Credit Facility       9,000,000    
Cerberus Credit Facility            
Debt Instrument [Line Items]            
Line of credit facility, term 5 years          
Outstanding indebtedness under the Credit Facility       0   $ 0
Available borrowing capacity under Credit Facility       25,000,000    
Term loan facility $ 393,000,000          
Revolving credit facility $ 25,000,000          
Line of credit facility, interest rate description Borrowings under the Cerberus Credit Facility bear interest, at the Borrower's option, at a Reference Rate plus 3.75% or a LIBOR Rate plus 6.5%, each as defined the Financing Agreement.          
Aggregate amount of each consecutive quarterly scheduled principal installment       $ 1,500,000    
Excess cash flow payment percentage       25.00%   50.00%
Leverage ratio       3.50%    
London Interbank Offered Rate (LIBOR) | Cerberus Credit Facility            
Debt Instrument [Line Items]            
Debt instrument, percentage points added to the reference rate 6.50%          
Base Rate | Cerberus Credit Facility            
Debt Instrument [Line Items]            
Debt instrument, percentage points added to the reference rate 3.75%          
Domestic Subsidiaries            
Debt Instrument [Line Items]            
Percentage of equity interests pledged           100.00%
Foreign Subsidiaries            
Debt Instrument [Line Items]            
Percentage of equity interests pledged           65.00%
SPHG Holdings            
Debt Instrument [Line Items]            
Debt instrument, principal amount       $ 14,900,000   $ 14,900,000
Letter of Credit Sublimit | PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Line of credit facility, maximum credit commitment   $ 5,000,000        
Uncommitted Accordion Feature | PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Line of credit facility, maximum credit commitment   $ 20,000,000        
Scenario 1 | London Interbank Offered Rate (LIBOR) | PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Debt instrument, percentage points added to the reference rate   2.25%        
Scenario 2 | London Interbank Offered Rate (LIBOR) | PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Debt instrument, percentage points added to the reference rate   1.00%        
Scenario 2 | Federal Funds Open Rate | PNC Bank Credit Facility            
Debt Instrument [Line Items]            
Debt instrument, percentage points added to the reference rate   0.50%        
5.25% Convertible Senior Notes Due 2019            
Debt Instrument [Line Items]            
Debt instrument issued     $ 100,000,000      
Debt instrument, stated interest rate     5.25% 0.50%    
Debt instrument, convertible, conversion ratio       166.2593    
Initial Conversion price | $ / shares       $ 6.01    
Debt instrument, redemption price percentage     100.00%      
Debt instrument, convertible, earliest date       Mar. 06, 2017    
Debt instrument, convertible, threshold percentage of stock price trigger       130.00%    
Debt instrument, convertible, threshold trading days | d       20    
Debt instrument, convertible, threshold consecutive trading days | d       30    
Additional interest paid       $ 200,000    
Debt instrument conversion option       28,100,000    
Debt instrument issuance costs       3,400,000    
Deferred debt instrument issuance costs       2,500,000    
Debt instrument, interest expense       $ 1,934,000 $ 2,047,000  
Debt instrument, interest rate, effective percentage       13.90%    
Notes Payable One            
Debt Instrument [Line Items]            
Face amount of purchased Notes       $ 3,700,000    
Purchase of the Company's Convertible Notes       3,700,000    
Loss on purchase of Notes       (100,000)    
Term Loan | Cerberus Credit Facility            
Debt Instrument [Line Items]            
Debt instrument issued       388,500,000   390,000,000
Current and long-term net       $ 387,406,000   $ 388,838,000