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STOCK-BASED COMPENSATION - Valuation Assumptions (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Jul. 02, 2021
Jun. 26, 2020
Assumptions for Black-Scholes:    
Risk-free interest rate 0.62% 0.49%
Expected term in years 5.5 5.5
Volatility 40.00% 40.00%
Expected annual dividends $ 0 $ 0
Value of options granted:    
Number of options granted 65,000 37,500
Weighted average fair value per share $ 3.92 $ 2.65
Fair value of options granted (000s) $ 255 $ 99