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Debt (Narrative) (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Apr. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Apr. 30, 2019
USD ($)
Jul. 31, 2019
USD ($)
Oct. 31, 2019
USD ($)
Line of Credit Facility [Line Items]          
Line Of Credit Facility, Borrowing Capacity, Term $ 15,000,000   $ 15,000,000    
Revolving credit facility bears interest increased     2.00%    
Interest rate     6.75%    
Judgments or judicial actions against the borrowers in excess     $ 250,000    
Accounts receivable [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility borrowing base limitation     85.00%    
Inventory [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility borrowing base limitation     60.00%    
Maximum [Member] | Accounts receivable [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility borrowing base limitation     85.00%    
Amendment No. 17 to Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Non-refundable Extension Fee     $ 250,000    
Amendment No. 19 to Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Non-refundable Extension Fee   $ 24,000      
Amendment No. 20 To Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Minimum EBITDA $ 5,000,000   $ 5,000,000    
Maximum fixed charge coverage ratio 1.10   1.10    
Non-refundable Extension Fee $ 125,000        
Amendment No. 20 To Credit Facility [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Covenant, Capital Expenditures Limit     $ 900,000    
Debt Instrument, Covenant, Aggregate Debt 8,000,000   8,000,000    
PNC [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity 60,000,000   60,000,000    
Line of credit facility, Equipment financing 2,500,000   2,500,000    
Remaining borrowing capacity 4,000,000   4,000,000    
PNC [Member] | Revolving Credit Facility [Member] | Amendment No. 19 to Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity   65,000,000      
Line Of Credit, Clean Down Limit   10,000,000      
Line Of Credit, Short-Term Borrowings Limit   2,000,000      
PNC [Member] | Letter of Credit [Member]          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity $ 3,000,000   $ 3,000,000    
PNC [Member] | Seasonal Advance [Member] | Amendment No. 19 to Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity   15,000,000      
PNC [Member] | Equipment Loan [Member] | Amendment No. 19 to Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity   10,000,000      
Line of credit facility, Equipment financing   $ 2,000,000      
Eurodollar [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility bears interest range of     1.75%    
Eurodollar [Member] | Maximum [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility bears interest range of     2.25%    
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility bears interest range of     0.75%    
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Maximum [Member]          
Line of Credit Facility [Line Items]          
Revolving credit facility bears interest range of     1.25%    
Scenario, Forecast [Member] | Amendment No. 20 To Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Maximum fixed charge coverage ratio       2.25  
Scenario, Forecast [Member] | Amendment No. 20 To Credit Facility [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Covenant, Capital Expenditures Limit       $ 1,900,000  
Debt Covenant Term One [Member] | Scenario, Forecast [Member] | Amendment No. 20 To Credit Facility [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Covenant, Capital Expenditures Limit         $ 3,900,000
Debt Instrument, Covenant, Capital Expenditure Limit Term On EBITDA         8,500,000
Debt Covenant Term Two [Member] | Scenario, Forecast [Member] | Amendment No. 20 To Credit Facility [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Covenant, Capital Expenditures Limit         2,900,000
Debt Instrument, Covenant, Capital Expenditure Limit Term On EBITDA         $ 8,500,000