SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021
Numerator:
Net income allocated, diluted	$ 26,053	$ 19,368
Class A Common Stock
Numerator:
Net income allocated, basic	20,311	15,095
Conversion of Class B to Class A shares	5,742	4,273
Net income allocated, diluted	$ 26,053	$ 19,368
Denominator:
Weighted average shares outstanding, basic (in shares)	9,869	9,853
Conversion of Class B to Class A shares (in shares)	4,294	4,294
Weighted average shares outstanding, diluted (in shares)	14,163	14,147
Net income per share
Basic (in dollars per share)	$ 2.06	$ 1.53
Diluted (in dollars per share)	$ 1.84	$ 1.37
Class B Common Stock
Numerator:
Net income allocated, basic	$ 5,742	$ 4,273
Conversion of Class B to Class A shares	0	0
Net income allocated, diluted	$ 5,742	$ 4,273
Denominator:
Weighted average shares outstanding, basic (in shares)	4,294	4,294
Conversion of Class B to Class A shares (in shares)	0	0
Weighted average shares outstanding, diluted (in shares)	4,294	4,294
Net income per share
Basic (in dollars per share)	$ 1.34	$ 1.00
Diluted (in dollars per share)	$ 1.34	$ 1.00