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NET INCOME PER SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Oct. 24, 2020 | Oct. 26, 2019
Common Class A [Member] |  |
Numerator: |  |
Net income allocated, basic | $ 2,526 | $ 1,939
Conversion of Class B to Class A shares | 716 | 558
Effect of share-based compensation on allocated net income |  | (2)
Net income allocated, diluted | $ 3,242 | $ 2,495
Denominator: |  |
Weighted average shares outstanding, basic (in shares) | 9,850 | 9,770
Conversion of Class B to Class A shares (in shares) | 4,294 | 4,294
Weighted average shares outstanding, diluted (in shares) | 14,144 | 14,064
Common Class B [Member] |  |
Numerator: |  |
Net income allocated, basic | $ 716 | $ 558
Conversion of Class B to Class A shares | 0 | 0
Effect of share-based compensation on allocated net income |  | (1)
Net income allocated, diluted | $ 716 | $ 557
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

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