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Note 6 - Debt And Capital Leases (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended 58 Months Ended 61 Months Ended
Sep. 03, 2013
USD ($)
Mar. 31, 2018
Subsidiary
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2018
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Debt And Capital Leases [Line Items]                      
Percentage of Stock of Material Domestic Subsidiaries Securing Credit Agreement                     100.00%
Percentage of Stock of Material First Tier Foreign Subsidiaries Securing Credit Agreement                     65.00%
Term Credit Agreements, U.S. Liquidity, Threshold Below which No Prepayment is Required                   $ 100,000,000  
Term Credit Agreements, Prepayments Required in Next Fiscal Year               $ 0      
Term Credit Agreements, First Lien Term Credit Agreement, Maximum Secured Leverage Ratio     2.75   2.75     2.75 2.75   2.75
Number of subsidiaries designated as unrestricted subsidiaries | Subsidiary   5                  
Total Sales     $ 366,000,000 $ 379,000,000 $ 1,095,000,000 $ 1,117,000,000          
Aggregate assets of designated subsidiaries     $ 1,540,000,000   $ 1,540,000,000     $ 1,707,000,000 $ 1,707,000,000   $ 1,540,000,000
Percentage of aggregate sales of unrestricted subsidiaries to consolidated sales of entity     1.00%   1.00%            
Percentage of aggregate assets of unrestricted subsidiaries to consolidated assets of entity     2.00%   2.00%           2.00%
Excess Availability Percentage of Lender Commitments Threshold Triggering Cash Dominion Control     12.50%   12.50%     12.50% 12.50%   12.50%
Unrestricted Subsidiaries [Member]                      
Debt And Capital Leases [Line Items]                      
Total Sales     $ 3,000,000   $ 8,000,000            
Aggregate assets of designated subsidiaries     25,000,000   25,000,000           $ 25,000,000
Amended Credit Agreement [Member]                      
Debt And Capital Leases [Line Items]                      
Excess Availability Amount     24,000,000   24,000,000     $ 20,000,000 $ 20,000,000   24,000,000
Line of Credit Facility, Maximum Borrowing Capacity     150,000,000   $ 150,000,000     150,000,000 150,000,000   150,000,000
Termination date         Jun. 05, 2019            
Long-term Line of Credit     85,000,000   $ 85,000,000     $ 96,000,000 $ 96,000,000   85,000,000
Fixed Charged Coverage Ratio Required               0.0100 0.0100    
Lender Commitments, Threshold Trigger, Excess Availability Amount     $ 18,750,000   $ 18,750,000     $ 18,750,000 $ 18,750,000   $ 18,750,000
Amended Credit Agreement [Member] | Period one [Member]                      
Debt And Capital Leases [Line Items]                      
Termination date         May 26, 2021            
Amended Credit Agreement [Member] | Period two [Member]                      
Debt And Capital Leases [Line Items]                      
Number of days prior to the earliest scheduled maturity date         90 days            
Earliest maturity date         Sep. 03, 2019            
Prior Credit Agreement [Member]                      
Debt And Capital Leases [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity $ 200,000,000                    
Amended Credit Facility [Member]                      
Debt And Capital Leases [Line Items]                      
Excess Availability, Calculation, Percentage of Eligible Receivables Less a Dilution Reserve     85.00%   85.00%           85.00%
Excess Availability, Calculation, Percentage of Net Orderly Liquidation Value     85.00%   85.00%           85.00%
Excess Availability, Calculation, Percentage of Eligible Inventory     75.00%   75.00%           75.00%
Excess Availability, Net Orderly Liquidation Equipment Amount     $ 12,000,000   $ 12,000,000           $ 12,000,000
Excess Availability, Calculation, Percentage of Eligible Equipment     75.00%   75.00%           75.00%
Decrease in excess availability net orderly liquidation equipment amount     $ 1,000,000   $ 1,000,000           $ 1,000,000
Maximum [Member]                      
Debt And Capital Leases [Line Items]                      
Secured leverage ratio             2.25%        
Maximum [Member] | Amended Credit Agreement [Member]                      
Debt And Capital Leases [Line Items]                      
Percentage of aggregate consolidated sales to qualify Restricted Subsidiaries to be designated as Unrestricted Subsidiaries         7.50%            
Percentage of aggregate consolidated assets to qualify Restricted Subsidiaries to be designated as Unrestricted Subsidiaries         7.50%            
Maximum [Member] | Amended Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         2.75%     2.75%      
Maximum [Member] | Amended Credit Facility [Member] | Base Rate [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         1.75%     1.75%      
Minimum [Member]                      
Debt And Capital Leases [Line Items]                      
Excess Availability Percentage of Lender Commitments Threshold Triggering Cash Dominion Control     12.50%   12.50%     12.50% 12.50%   12.50%
Minimum [Member] | Amended Credit Agreement [Member]                      
Debt And Capital Leases [Line Items]                      
Proforma fixed charge coverage ratio         1.00%     1.00%      
Minimum [Member] | Amended Credit Agreement [Member] | Pro Forma [Member]                      
Debt And Capital Leases [Line Items]                      
Excess Availability Amount     $ 30,000,000   $ 30,000,000           $ 30,000,000
Minimum [Member] | Amended Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         2.25%     2.25%      
Minimum [Member] | Amended Credit Facility [Member] | Base Rate [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         1.25%     1.25%      
First Lien Term Loan [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         6.25%     6.25%      
LIBOR Floor Percentage     1.00%   1.00%     1.00% 1.00%   1.00%
Alternate Base Rate     5.25%   5.25%     5.25% 5.25%   5.25%
Prepayment of principal amount                 $ 11,000,000    
First installment principal payments 4,000,000                    
Term Credit Agreement [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument Face Amount 695,000,000                    
Proceeds from Issuance of Other Long-term Debt 664,000,000                    
Debt Instrument Unamortized Discount 15,000,000                    
Debt Issuance Cost 16,000,000                    
First Lien Term Loan [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument Face Amount $ 420,000,000   $ 395,000,000   $ 395,000,000           $ 395,000,000
Debt Instrument, Maturity Date, Description The loans made under the First Lien Term Credit Agreement become due on the earlier to occur of                    
Debt Instrument, Maturity Date Sep. 03, 2019       Sep. 03, 2019            
Second Lien Note Holders [Member]                      
Debt And Capital Leases [Line Items]                      
Debt Instrument Face Amount $ 275,000,000                    
Debt Instrument, Termination Date Nov. 15, 2016