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Credit Agreements (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 21, 2017
Apr. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Jan. 28, 2017
Mar. 10, 2016
Oct. 08, 2015
Debt Instrument [Line Items]                  
Long-term debt, gross of unamortized issuance costs     $ 77,371,000   $ 77,371,000        
Long-term debt     76,748,000   76,748,000   $ 85,388,000    
Long-term credit facilities, current maturities     (3,440,000)   (3,440,000)   (3,242,000)    
Long-term credit facilities, excluding current portion     73,308,000   73,308,000   $ 82,146,000    
Principal prepayments of GACP Term Loan         11,058,000 $ 1,355,000      
Loss on extinguishment of debt     0 $ 0 (913,000) 0      
Early termination and lender fees included in loss on extinguishment of debt         199,000 0      
Unamortized debt issuance costs included in loss on extinguishment of debt         214,000 262,000      
PNC Bank, N.A. [Member]                  
Debt Instrument [Line Items]                  
Revolving line of credit facility, maximum borrowing capacity     90,000,000   90,000,000        
Revolving line of credit, accordion feature     25,000,000   25,000,000        
Proceeds from PNC Credit Facility $ 6,000,000                
Debt Instrument, Maturity Date Mar. 21, 2022           May 01, 2020    
Revolving line of credit facility, capacity available for the issuance of letters of credit     6,000,000   $ 6,000,000        
Debt instrument term         5 years        
Imputed effective interest rate         7.70%        
Interest expense     1,079,000 1,010,000 $ 2,142,000 1,867,000      
Debt instrument covenant compliance, minimum unrestricted cash plus facility requirement     10,000,000   10,000,000        
Additional cash required to be restricted under PNC Credit Facility covenants     0   $ 0        
Financial covenant, minimum fixed charge coverage ratio         1.1 to 1.0        
Minimum unrestricted cash plus facility available threshold for additional covenants     18,000,000   $ 18,000,000        
Unrestricted cash plus credit facility available     33,400,000   33,400,000        
Debt issuance costs, gross of amortization     1,369,000   1,369,000        
PNC Bank, N.A. [Member] | Original 2012 Line Of Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Debt issuance costs, gross of amortization     466,000   466,000        
PNC Bank, N.A. [Member] | Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Revolving loan     55,500,000   55,500,000   $ 59,900,000    
Remaining borrowing capacity     11,400,000   11,400,000        
PNC Bank, N.A. [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Long-term debt, gross of unamortized issuance costs     15,505,000   15,505,000   10,637,000    
Less unamortized debt issuance costs     (176,000)   (176,000)   (181,000)    
Long-term debt     15,329,000   15,329,000   10,456,000   $ 15,000,000
Long-term credit facilities, current maturities     (2,500,000)   (2,500,000)        
First security interest maximum     19,000,000   $ 19,000,000        
Debt instrument term         84 months        
Mandatory prepayment percentage of excess cash flow         50.00%        
Mandatory prepayment maximum amount         $ 2,000,000        
PNC Bank, N.A. [Member] | Year One [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         3.00%        
PNC Bank, N.A. [Member] | Year Two [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         1.00%        
PNC Bank, N.A. [Member] | Year Three [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         0.50%        
PNC Bank, N.A. [Member] | After Year Three [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         0.00%        
GACP [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Maturity Date         Mar. 09, 2021        
Debt instrument term         5 years        
Mandatory prepayment percentage of excess cash flow         50.00%        
Imputed effective interest rate         15.50%        
Interest expense     231,000 $ 592,000 $ 661,000 $ 934,000      
Debt instrument covenant compliance, minimum unrestricted cash plus facility requirement     10,000,000   $ 10,000,000        
Financial covenant, minimum fixed charge coverage ratio         1.1 to 1.0        
Minimum unrestricted cash plus facility available threshold for additional covenants     18,000,000   $ 18,000,000        
Debt issuance costs, gross of amortization     1,556,000   1,556,000        
GACP [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Long-term debt, gross of unamortized issuance costs     6,366,000   6,366,000   16,292,000    
Less unamortized debt issuance costs     (447,000)   (447,000)   (1,260,000)    
Long-term debt     $ 5,919,000   $ 5,919,000   $ 15,032,000 $ 17,000,000  
Principal prepayments of GACP Term Loan $ 9,500,000                
Loss on extinguishment of debt 913,000                
Early termination and lender fees included in loss on extinguishment of debt 199,000                
Unamortized debt issuance costs included in loss on extinguishment of debt $ 714,000                
Monthly installment amount, Repayments of principal   $ 70,833              
GACP [Member] | Alternate Base Rate [Domain]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         10.00%        
GACP [Member] | LIBOR [Member]                  
Debt Instrument [Line Items]                  
LIBOR Rate Period One         1 month        
LIBOR Rate Period Two         2 months        
LIBOR Rate Period Three         3 months        
GACP [Member] | Interest Rate Floor [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         1.00%        
GACP [Member] | Base Rate [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         11.00%        
GACP [Member] | Year Two [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         2.00%        
GACP [Member] | Year Three [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         1.00%        
GACP [Member] | After Year Three [Member]                  
Debt Instrument [Line Items]                  
Debt early termination fee, percentage         0.00%        
Minimum [Member] | PNC Bank, N.A. [Member] | LIBOR [Member] | Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         3.00%        
Minimum [Member] | PNC Bank, N.A. [Member] | LIBOR [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         5.00%        
Minimum [Member] | PNC Bank, N.A. [Member] | Base Rate [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         4.00%        
Maximum [Member] | PNC Bank, N.A. [Member] | LIBOR [Member] | Line of Credit [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         4.50%        
Maximum [Member] | PNC Bank, N.A. [Member] | LIBOR [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         6.00%        
Maximum [Member] | PNC Bank, N.A. [Member] | Base Rate [Member] | Term Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         5.00%