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CREDIT FACILITIES - Narrative (Details)
1 Months Ended 3 Months Ended
Nov. 06, 2018
USD ($)
Sep. 27, 2018
USD ($)
Sep. 18, 2018
USD ($)
Jul. 26, 2018
USD ($)
Dec. 14, 2015
Jan. 31, 2013
USD ($)
Dec. 28, 2018
USD ($)
Dec. 29, 2017
USD ($)
Sep. 30, 2018
USD ($)
Jan. 18, 2013
USD ($)
Line of Credit Facility [Line Items]                    
Maximum borrowing capacity             $ 22,000,000      
Advances from revolving credit facility             20,608,000 $ 11,593,000    
Repayments of long-term debt             20,595,000   $ 17,451,000  
Credit Agreement 2013 [Member] | Term Loan B [Member]                    
Line of Credit Facility [Line Items]                    
Long-term line of credit                   $ 14,000,000
Repayment monthly installments           120 equal monthly installments        
Line of credit facility, periodic payment, principal           $ 117,000 71,000      
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid             600,000      
Face amount             6,000,000     $ 8,000,000
Fifth Amendment [Member] | Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member]                    
Line of Credit Facility [Line Items]                    
Basis spread on variable rate         3.25%          
Revolving Credit Facility [Member]                    
Line of Credit Facility [Line Items]                    
Maximum borrowing capacity             $ 22,000,000.0      
Maturity date             May 05, 2022      
Repayments of long-term debt             $ 16,015,000   12,996,000  
Maximum borrowing capacity as percentage of eligible receivables             85.00%      
Maximum borrowing capacity based on eligible inventories             $ 8,000,000.0      
Current borrowing capacity             22,000,000.0   22,000,000.0  
Line of Credit Facility, Remaining Borrowing Capacity             6,000,000   9,000,000  
Line of Credit Facility, Average Outstanding Amount             $ 15,000,000 9,600,000    
Revolving Credit Facility [Member] | Minimum [Member]                    
Line of Credit Facility [Line Items]                    
Unused capacity, commitment fee percentage             0.25%      
Revolving Credit Facility [Member] | Maximum [Member]                    
Line of Credit Facility [Line Items]                    
Unused capacity, commitment fee percentage             0.375%      
Revolving Credit Facility [Member] | Credit Agreement 2013 [Member]                    
Line of Credit Facility [Line Items]                    
Average borrowing capacity             $ 22,000,000      
Commitment fee amount             $ 8,200 $ 6,600    
Line of Credit Facility, Covenant, Minimum Fixed Charge Coverage Ratio             1.10      
Revolving Credit Facility [Member] | Fifth Amendment [Member] | London Interbank Offered Rate (LIBOR) [Member]                    
Line of Credit Facility [Line Items]                    
Basis spread on variable rate         3.00%          
Equipment Line Advances [Member]                    
Line of Credit Facility [Line Items]                    
Maximum borrowing capacity             $ 1,500,000      
Advances from revolving credit facility $ 400,000   $ 300,000              
Repayments of long-term debt             $ 705,000   $ 314,000  
Equipment Line Advances Term Note [Member]                    
Line of Credit Facility [Line Items]                    
Debt Conversion, Converted Instrument, Amount   $ 100,000   $ 800,000            
Debt instrument, periodic payment, principal   $ 2,000   $ 21,000            
Term Loan B [Member]                    
Line of Credit Facility [Line Items]                    
Maturity date             May 05, 2022