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STOCK-BASED COMPENSATION - Valuation Assumptions (Details) - USD ($)
6 Months Ended
Mar. 31, 2017
Apr. 01, 2016
Assumptions for Black-Scholes:    
Risk-free interest rate 1.48%  
Expected term in years 4 years  
Volatility 40.00%  
Expected annual dividends $ 0  
Value of options granted:    
Number of options granted (in shares) 50,000 0
Weighted average fair value per share (in dollars per share) $ 1.18 $ 0.00
Fair value of options granted (000s) $ 59,000