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REVENUE RECOGNITION - Contract Balances (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Sep. 30, 2022
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]      
Contract assets, current $ 7,420 $ 6,273 $ 5,125
Contract assets, non-current 7,050 4,218  
Contract liabilities (deferred revenue), current 12,786 13,394 13,647
Contract liabilities (deferred revenue), non-current $ 2,056 $ 1,775 $ 1,409