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Revenue Recognition - Contract Balances (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Sep. 30, 2022
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]      
Contract assets, current $ 8,845 $ 6,273 $ 4,503
Contract assets, non-current portion 6,839 4,218  
Contract liabilities (deferred revenue), current 11,969 13,394 10,360
Contract liabilities (deferred revenue), non-current $ 1,211 $ 1,775 $ 1,053