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DEBT - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Jul. 31, 2021
Jul. 25, 2020
Dec. 29, 2017
Debt Instrument [Line Items]      
Total debt, excluding obligations under leases $ 73,803 $ 80,615  
Less current portion 6,976 6,421  
Long-term debt 66,827 74,194 $ 6,563
Line of Credit | Revolving Credit Facility      
Debt Instrument [Line Items]      
Total debt, excluding obligations under leases 0 50,000  
Line of Credit | Secured Debt      
Debt Instrument [Line Items]      
Total debt, excluding obligations under leases 47,025 0  
Line of Credit | Medium-term Notes      
Debt Instrument [Line Items]      
Total debt, excluding obligations under leases 21,104 24,694  
New Market Tax Credit Financing      
Debt Instrument [Line Items]      
Total debt, excluding obligations under leases $ 5,674 $ 5,921