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Debt - Additional Information (Detail) - USD ($)
$ in Millions
Sep. 07, 2018
Oct. 31, 2020
Feb. 01, 2020
Debt Instrument [Line Items]      
Long-term line of credit   $ 30.0 $ 0.0
Subsidiaries [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 75.0    
Increase (decrease) in aggregate credit facility principal amount $ 25.0    
Unused capacity, commitment fee percentage 0.20%    
Debt instrument, fixed charge coverage ratio 1.0    
Available borrowings $ 7.5 $ 45.0 $ 75.0
Subsidiaries [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member] | Base Rate [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 10.00%    
Subsidiaries [Member] | Minimum [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate (1.00%)    
Subsidiaries [Member] | Minimum [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member] | Adjusted London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.00%    
Subsidiaries [Member] | Maximum [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate (1.50%)    
Subsidiaries [Member] | Maximum [Member] | Revolving Credit Facility [Member] | New Credit Agreement [Member] | Adjusted London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.30%