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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets Arising from Business Acquisitions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 100,961 $ 100,461
Accumulated Amortization 33,807 26,623
Net $ 67,154 73,838
Developed technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Estimated Useful Lives 15 years  
Gross Carrying Amount $ 89,096 89,096
Accumulated Amortization 28,137 22,182
Net $ 60,959 66,914
Intellectual property    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Estimated Useful Lives 13 years  
Gross Carrying Amount $ 2,000 1,500
Accumulated Amortization 328 216
Net $ 1,672 1,284
Trade name    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Estimated Useful Lives 20 years  
Gross Carrying Amount $ 5,865 5,865
Accumulated Amortization 1,475 1,158
Net $ 4,390 4,707
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Estimated Useful Lives 5 years  
Gross Carrying Amount $ 4,000 4,000
Accumulated Amortization 3,867 3,067
Net $ 133 $ 933