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STOCK OPTIONS - Schedule of stock options, activity (Details) - USD ($)
 12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Shares    
Outstanding, beginning of period (in shares) 626,500 363,500
Granted (in shares) 110,750 266,500
Exercised (in shares) (49,149) (3,500)
Canceled or expired (in shares) (91,625) 0
Outstanding and expected to vest, end of period (in shares) 596,476 626,500
Outstanding and expected to vest, end of period (in shares) 246,976 351,750
Shares available for future grant (in shares) 63,750 174,500
Weighted Average Exercise Price    
Outstanding, beginning of period (in dollars per share) $ 20.41 $ 19.25
Granted (in dollars per share) 10.65 21.90
Exercised (in dollars per share) 14.40 14.40
Canceled or expired (in dollars per share) 19.64
Outstanding and expected to vest, end of period (in dollars per share) 19.21 20.41
Exercisable, end of period (in dollars per share) $ 20.33 $ 19.28
Weighted Average Contractual Term    
Outstanding 6 years 3 months 18 days 6 years 1 month 6 days
Exercisable 3 years 1 month 6 days  
Aggregate Intrinsic Value    
Outstanding and expected to vest, end of period $ 583,000 $ 0
Exercisable, end of period $ 61,000 $ 0