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STOCK-BASED COMPENSATION AND STOCK OWNERSHIP PLANS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 02, 2017
Mar. 31, 2023
Apr. 01, 2022
Mar. 31, 2023
Apr. 01, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for grant (in shares)   451,211   451,211  
Award performance period (in years)       3 years  
Employee stock purchase plan, purchase price (in percent) 85.00%        
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Bonus achievement target level (in percent)       80.00%  
Bonus payout as a percentage of target award       50.00%  
Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Bonus achievement target level (in percent)       120.00%  
Bonus payout as a percentage of target award       150.00%  
Class A          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Employee stock purchase plan shares issued (in shares)   0 0 0 0
Non-Vested Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares tendered for tax withholding (in shares)       2,289 1,778
Stock-based compensation expense, net of forfeitures   $ 489 $ 266 $ 945 $ 561
Unrecognized stock-based compensation expense   3,249   3,249  
Fair value of vested restricted stock       $ 1,029 1,053
Non-Vested Stock | Director | Class A          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       1 year  
Non-Vested Stock | Employees | Class A          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       4 years  
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense, net of forfeitures   449 597 $ 925 1,325
Unrecognized stock-based compensation expense   2,202   2,202  
Fair value of vested restricted stock       $ 2,555 $ 2,849
Shares tendered back to company (in shares)       5,324 2,799
Restricted Stock Units (RSUs) | Vesting Period 1          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       1 year  
Restricted Stock Units (RSUs) | Vesting Period 2          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       3 years  
Employee Stock | Class A          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense, net of forfeitures   $ 33 $ 96 $ 54 $ 199