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Short-Term Borrowings And Credit Arrangements - Additional Information (Details)
12 Months Ended
Mar. 07, 2019
USD ($)
bank
Mar. 31, 2020
Feb. 01, 2020
USD ($)
Nov. 30, 2019
USD ($)
Oct. 04, 2019
USD ($)
Sep. 30, 2019
USD ($)
Sep. 24, 2019
USD ($)
Sep. 10, 2019
USD ($)
May 23, 2019
USD ($)
Mar. 31, 2019
USD ($)
Mar. 06, 2019
USD ($)
bank
Sep. 30, 2018
USD ($)
Debt Instrument [Line Items]                        
Long-term debt, net of current portion           $ 7,000       $ 13,000   $ 40,111,000
Capital Lease Obligations                        
Debt Instrument [Line Items]                        
Current portion of long-term debt           12,000       145,000   73,000
Long-term debt, net of current portion           7,000       13,000   84,000
Long term debt           19,000       158,000   157,000
Financed Computer Equipment                        
Debt Instrument [Line Items]                        
Current portion of long-term debt           27,000       173,000   158,000
Long-term debt, net of current portion           0       0   27,000
Long term debt           27,000       173,000   185,000
ABL Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity $ 125,000,000               $ 100,000,000      
Revolving credit facility agreement with number of banks | bank 3                      
Reduction in borrowing capacity             $ 11,000,000 $ 10,000,000 $ 15,000,000      
Fixed charge coverage ratio                 1.00      
Capital expenditures                 $ 8,000,000      
Unused commitment fee percentage 0.25%                      
Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Borrowings outstanding           $ 50,381,000       $ 26,139,000    
Prior Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity                     $ 50,000,000  
Revolving credit facility agreement with number of banks | bank                     2  
Borrowings outstanding                       $ 61,185,000
Federal Funds Effective Swap Rate | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Variable rate 0.50%                      
London Interbank Offered Rate (LIBOR) | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Variable rate 1.00%                      
Subsequent Event | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Reduction in borrowing capacity         $ 12,500,000              
Forecast | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Reduction in borrowing capacity     $ 25,000,000 $ 20,000,000                
Forecast | London Interbank Offered Rate (LIBOR) | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Variable rate   2.50%                    
Forecast | Base Rate | ABL Credit Facility                        
Debt Instrument [Line Items]                        
Variable rate   1.50%