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DEBT - Revolving Credit Facility and Amendments Narrative (Details)
12 Months Ended
Sep. 13, 2024
USD ($)
Jun. 02, 2024
USD ($)
May 14, 2024
USD ($)
Jan. 09, 2023
USD ($)
Dec. 29, 2022
wk
day
Oct. 12, 2022
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Jan. 27, 2022
USD ($)
Jan. 07, 2022
USD ($)
Nov. 27, 2021
USD ($)
Nov. 05, 2021
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Aug. 07, 2024
USD ($)
Sep. 27, 2021
DEBT                              
Proceeds from Lines of Credit                     $ 26,000,000 $ 12,000,000 $ 6,000,000    
Cash and cash equivalents held on hand domestically       $ 10,000,000                      
Consideration to be paid-in-kind (as a percent)       0.50%                      
Consideration to be paid in cash upon prepayments (as a percent)       0.50%                      
Consideration to be paid in cash upon permanent reductions (as a percent)       7.00%                      
Unamortized debt issuance costs                     9,576,000 11,950,000      
Interest expense                       4,282,000 4,515,000    
Amortization of debt discount and issuance costs                     11,681,000   $ 11,089,000    
Senior Secured Second Lien PIK Notes Due 2027                              
DEBT                              
Unamortized debt issuance costs                     1,297,000 1,563,000      
Interest and debt expense                     6,290,000        
Interest expense                     3,983,000        
Accretion expense                     1,608,000        
Amortization of debt discount and issuance costs                     $ 699,000        
Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt                              
DEBT                              
Cure period 30 days                            
Threshold of aggregate principal holders (percent) 30.00%                   25.00%        
Senior Secured Second Lien PIK Notes Due 2027 | March 14, 2026 to September 13, 2026] | Secured Debt                              
DEBT                              
Redemption price (percent) 102.00%                            
Senior Secured Second Lien PIK Notes Due 2027 | After September 14, 2026 | Secured Debt                              
DEBT                              
Redemption price (percent) 100.00%                            
Senior Secured Second Lien PIK Notes Due 2027 | Prior to March 13, 2026 | Secured Debt                              
DEBT                              
Redemption price (percent) 100.00%                            
Convertible Senior Notes                              
DEBT                              
Unamortized debt issuance costs                     $ 2,093,000 3,031,000      
Interest and debt expense                 $ 11,745,000            
Interest expense                 4,529,000            
Accretion expense                 6,270,000            
Amortization of debt discount and issuance costs                 $ 946,000            
Threshold of aggregate principal holders (percent)                             25.00%
Amendment Relief Period | Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt                              
DEBT                              
Default amount under amendment provisions $ 8,625,000                            
After Amendment Relief Period | Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt                              
DEBT                              
Default amount under amendment provisions $ 17,250,000                            
Waiver period after acquisition closing 90 days                            
2024 Settlement | Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt                              
DEBT                              
Default amount under amendment provisions $ 11,500,000                            
Minimum | Secured Overnight Financing Rate (SOFR)                              
DEBT                              
Variable interest rate (as a percent)       1.00% 0.42826%                    
Maximum | Secured Overnight Financing Rate (SOFR)                              
DEBT                              
Debt instrument, adjustment rate         0.0011448                    
Revolving Credit Facility                              
DEBT                              
Line of credit outstanding                     $ 3,000,000 $ 0      
Commitment fee (as percentage)                   1.00%          
Principal amount of revolving loan facility                   $ 15,000,000          
Credit Agreement                              
DEBT                              
Basis points adjustments (as percentage)       0.50% 6.50%                    
Effective rate (as percentage)                     0.50% 1.00%      
Line of credit borrowing capacity 22,550,000                            
Debt instrument, financial statement threshold to provide cash flow forecast | day         10                    
Budgeted period | wk         13                    
Financial advisory term         6 months                    
Charges or expenses addback limit 32,000,000 $ 28,500,000 $ 26,500,000                        
Consideration fee (percent)   0.50% 0.50%                        
Cap on reinvestment of funds from extraordinary receipts and asset sales and casualty events $ 5,000,000                            
Debt instrument, financial statement threshold | day         30                    
Credit Agreement | Line Of Credit Facility, Leverage Ratio To Be Maintained Beginning Quarter Ending September 30, 2023                              
DEBT                              
Threshold secured leverage ratio                   3.75          
Credit Agreement | Line Of Credit Facility, Leverage Ratio To Be Maintained Beginning Quarter Ending March 31, 2025                              
DEBT                              
Threshold secured leverage ratio                   3.00          
Credit Agreement | Line Of Credit Facility, Minimum Fixed Charge Coverage Ratio To Be Maintained During First Anniversary                              
DEBT                              
Threshold secured leverage ratio                   1.00          
Credit Agreement | Line Of Credit Facility, Minimum Fixed Charge Coverage Ratio To Be Maintained From And After First Anniversary                              
DEBT                              
Threshold secured leverage ratio                   1.10          
Credit Agreement | Line Of Credit Facility, Leverage Ratio To Be Maintained Beginning Quarter Ending September 30, 2023                              
DEBT                              
Minimum weekly liquidity requirement                           $ 7,000,000  
Credit Agreement | Weeks ending October 11, 2024, October 18, 2024 and October 25, 2024                              
DEBT                              
Minimum weekly liquidity requirement                           17,500,000  
Credit Agreement | Each week thereafter                              
DEBT                              
Minimum weekly liquidity requirement                           $ 10,000,000  
Credit Agreement | Line Of Credit Facility, Initial Leverage Ratio                              
DEBT                              
Threshold secured leverage ratio                   4.25          
Credit Agreement | Prime Rate                              
DEBT                              
Basis points adjustments (as percentage)                   5.25%          
Credit Agreement | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)                   6.25%          
Credit Agreement | Base Rate                              
DEBT                              
Basis points adjustments (as percentage)       1.00% 0.50%                    
Credit Agreement | Minimum                              
DEBT                              
Variable interest rate (as a percent)                   1.00%          
Credit Agreement | Minimum | Prime Rate                              
DEBT                              
Basis points adjustments (as percentage)                   5.00%          
Credit Agreement | Minimum | Secured Overnight Financing Rate (SOFR)                              
DEBT                              
Basis points adjustments (as percentage)       6.75% 1.00%                    
Debt instrument, adjustment rate         6                    
Variable interest rate (as a percent)       0.11448%                      
Credit Agreement | Minimum | Base Rate                              
DEBT                              
Basis points adjustments (as percentage)       5.75% 5.00%                    
Variable interest rate (as a percent)       2.00% 1.00%                    
Effective interest rate (percent)         2.00%                    
Credit Agreement | Maximum | Prime Rate                              
DEBT                              
Basis points adjustments (as percentage)                   5.50%          
Credit Agreement | Maximum | Secured Overnight Financing Rate (SOFR)                              
DEBT                              
Basis points adjustments (as percentage)       9.50% 6.00%                    
Variable interest rate (as a percent)       0.42826%                      
Credit Agreement | Maximum | Base Rate                              
DEBT                              
Basis points adjustments (as percentage)       8.50% 5.50%                    
Delayed Draw Term Loan                              
DEBT                              
Commitment fee (as percentage)                   1.00%          
Proceeds from Lines of Credit               $ 35,000,000              
Borrowings on delayed draw term loan               $ 0.0600              
Line of credit borrowing capacity                   $ 35,000,000          
Maximum term for drawing loan facility                   18 months          
Delayed Draw Term Loan | Minimum                              
DEBT                              
Basis points adjustments (as percentage)                   6.00%          
Delayed Draw Term Loan | Minimum | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)               6.50%              
Delayed Draw Term Loan | Maximum                              
DEBT                              
Basis points adjustments (as percentage)                   6.50%          
Delayed Draw Term Loan | Maximum | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)               6.25%              
Term Loan                              
DEBT                              
Effective rate (as percentage)                     1.00%        
Volunteer principal prepayments (as percentage)             0.0100                
Line of credit borrowing capacity             $ 40,000,000     $ 165,000,000          
Maximum term for drawing loan facility             24 months                
Term Loan | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)             6.25%                
Term Loan | Minimum | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)             6.00%                
Term Loan | Maximum | London Interbank Offered Rate                              
DEBT                              
Basis points adjustments (as percentage)             6.50%                
New Delayed Draw Term Loan                              
DEBT                              
Borrowings on delayed draw term loan           $ 35,000,000