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Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($)
$ in Thousands
Dec. 28, 2018
Apr. 28, 2018
Jan. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money Market Funds (included in Cash and Cash Equivalents)   $ 4 $ 1,798
State and Municipal Obligations (included in Securities Available for Sale)     1,511
Swap Contracts (included in Other Assets)   176 101
Total assets   180 3,410
Swap Contracts (included in Other Liabilities) $ 1,513 1,166  
Earnout liability (included in Other Liabilities) 15 15  
Total liabilities 1,528 1,181  
Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money Market Funds (included in Cash and Cash Equivalents)   4 1,798
Total assets   4 1,798
Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
State and Municipal Obligations (included in Securities Available for Sale)     1,511
Swap Contracts (included in Other Assets)   176 101
Total assets   176 $ 1,612
Swap Contracts (included in Other Liabilities) 1,513 1,166  
Total liabilities 1,513 1,166  
Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Earnout liability (included in Other Liabilities) 15 15  
Total liabilities $ 15 $ 15