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Stock Incentive Compensation Activity - Stock Option, Restricted Stock and Restricted Stock Units (Details) - $ / shares
6 Months Ended 12 Months Ended
Nov. 01, 2018
Nov. 01, 2017
Apr. 30, 2019
Apr. 30, 2018
Oct. 31, 2018
Employee Stock Option [Member]          
Number of Shares          
Granted     0    
Exercised     0 (11,000)  
Canceled     0 0  
Options, Outstanding End of Period 32,500 58,166 32,500 47,166  
Weighted-Average Exercise Price          
Granted, Weighted Average Exercise Price Per Share     $ 0.00    
Exercised, Weighted Average Exercise Price Per Share     0.00 $ 2.98  
Forfeitures and Expirations in Period, Weighted Average Exercise Price     0.00 0.00  
Options, Outstanding, End of Period, Weighted Average Exercise Price Per Share $ 9.42 $ 8.16 $ 9.42 $ 9.37  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 1 year 10 months 2 days 2 years 6 months 10 days 1 year 4 months 4 days 2 years 3 months 26 days  
Restricted Stock [Member]          
Weighted-Average Exercise Price          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 1 year 10 months 13 days        
Weighted Average Grant Date Fair Value Restricted Stock and RSUs          
Stock, Granted     370,000 268,000  
Stock, Vested     (223,000) (183,000)  
Stock, Forfeited     (39,000) (8,000)  
Nonvested, End of Period 478,000 441,282 586,000 518,282  
Granted, Weighted Average Grant Date Fair Value     $ 6.86 $ 8.06  
Vested, Weighted Average Grant Date Fair Value     6.79 7.69  
Forfeited, Weighted Average Grant Date Fair Value     7.27 7.89  
Nonvested, Weighted Average Grant Date Fair Value, End of Period $ 7.45 $ 7.07 $ 7.34 $ 7.35  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms   1 year 7 months 5 days 2 years 1 month 1 year 11 months 23 days  
Restricted Stock Units (RSUs) [Member]          
Weighted Average Grant Date Fair Value Restricted Stock and RSUs          
Stock, Granted     31,000 18,000  
Stock, Vested     (14,000) (15,000)  
Stock, Forfeited     (3,000) (11,000)  
Nonvested, End of Period 27,000 35,815 41,000 27,815  
Granted, Weighted Average Grant Date Fair Value     $ 6.71 $ 7.90  
Vested, Weighted Average Grant Date Fair Value     7.98 8.30  
Forfeited, Weighted Average Grant Date Fair Value     7.35 5.96  
Nonvested, Weighted Average Grant Date Fair Value, End of Period $ 8.17 $ 7.69 $ 7.15 $ 8.14  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms 1 year 4 months 13 days 1 year 9 months 25 days 1 year 10 months 20 days 1 year 11 months 5 days  
Minimum [Member] | Employee Stock Option [Member]          
Class of Stock          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         3 years
Maximum [Member] | Employee Stock Option [Member]          
Class of Stock          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         10 years