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Income Taxes (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 22, 2017
Jan. 31, 2018
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2016
Oct. 31, 2016
Income Tax Contingency [Line Items]            
Unrecognized tax benefits   $ 38,000 $ 38,000 $ 29,000 $ 31,000  
Unrecognized tax benefits that would favorably impact effective tax rate   30,000 30,000      
Liability for interest and penalties related to unrecognized tax benefits   5,000 5,000 4,000    
Unrecognized tax benefit amount that is reasonably possible to decrease   4,000 4,000      
Valuation allowance   925,000 925,000 515,000   $ 17,962,000
Federal net operating loss carryforward   13,458,000 13,458,000      
State net operating loss carryforward   30,979,000 30,979,000      
Excess tax benefit amount for share based compensation     200,000 $ 0 $ 0  
TCJA, Change in tax rate, income tax expense (benefit) $ 4,438,000 $ 4,438,000        
Accounting Standards update 2016-09 [Member]            
Income Tax Contingency [Line Items]            
Excess tax benefit amount for share based compensation     $ 172,000