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STOCK-BASED COMPENSATION - Valuation Assumptions (Details) - USD ($)
9 Months Ended
Jun. 28, 2019
Jun. 29, 2018
Assumptions for Black-Scholes:    
Risk-free interest rate 2.35% 2.31%
Expected term in years 5 years 6 months 5 years 6 months
Volatility 37.00% 38.00%
Expected annual dividends $ 0 $ 0
Value of options granted:    
Number of options granted (in shares) 20,000 20,000
Weighted average fair value per share (in dollars per share) $ 2.33 $ 1.53
Fair value of options granted (000s) $ 47,000 $ 31,000