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STOCK-BASED COMPENSATION - Valuation Assumptions (Details) - USD ($)
3 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Assumptions for Black-Scholes:    
Risk-free interest rate   2.09%
Expected term in years   5 years 6 months
Volatility   38.00%
Expected annual dividends   $ 0
Value of options granted:    
Number of options granted (in shares) 0 10,000
Weighted average fair value per share (in dollars per share)   $ 1.62
Fair value of options granted (000s)   $ 16,000